# IPv4 / 6 Statistics

**URL:** <https://community.ntppool.org/t/ipv4-6-statistics/3841>\
**Category:** Pool Development\
**Created:** [May 30, 2025, 7:04pm UTC](https://community.ntppool.org/t/ipv4-6-statistics/3841 "2025-05-30T19:04:49Z")\
**Posts on this page:** 20\
**Page:** 2

<div class="post-metadata">

**Author:** ![davehart](https://sea2.discourse-cdn.com/flex016/user_avatar/community.ntppool.org/davehart/32/1411_2.png) [@davehart](https://community.ntppool.org/u/davehart)\
**Post date:** [June 28, 2025, 11:26pm UTC](https://community.ntppool.org/t/ipv4-6-statistics/3841/21 "2025-06-28T23:26:41Z")

</div>

So some population of IPv6 client(s) is flooding your server. In your position, I’d want to know more about how many different addresses, and see if they are also serving NTP, or, more likely, it’s some broken SNTP client you might be able to get fixed by the operator with help from their ISP and/or the responsible software developer. If you share some offending IP addresses here, others can see if they’re getting hit as well.

You can use packet capture, or if you happen to use ntpd/ntpsec, `ntpq -ncmru | head -50` after disabling the firewall rule.

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<div class="post-metadata">

**Author:** ![rhbvkleef](https://sea2.discourse-cdn.com/flex016/user_avatar/community.ntppool.org/rhbvkleef/32/1726_2.png) [@rhbvkleef](https://community.ntppool.org/u/rhbvkleef)\
**Post date:** [July 6, 2025, 9:07am UTC](https://community.ntppool.org/t/ipv4-6-statistics/3841/22 "2025-07-06T09:07:20Z")

</div>

Where do you get these statistics from? My vantage point (DNS-level information) paints an entirely different picture (although Belgium is hard for me to research), with usually only about 5% of NTP servers operating IPv6. I suspect Belgium will be higher though.

Your personal traffic measurements are encouraging, though.

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<div class="post-metadata">

**Author:** ![microchip8](https://sea2.discourse-cdn.com/flex016/user_avatar/community.ntppool.org/microchip8/32/1388_2.png) [@microchip8](https://community.ntppool.org/u/microchip8)\
**Post date:** [July 6, 2025, 2:33pm UTC](https://community.ntppool.org/t/ipv4-6-statistics/3841/23 "2025-07-06T14:33:06Z")

</div>

I get them from my MikroTik router, which reports packets/s and also shows a graph. I’ve seen combined IPv4/6 peaks of up to 2200 packets/s. My IPv4 speed is set to 1 Gbps relative to others but a few days ago I changed the IPv6 speed to 2 Gbps (from 1 Gbps) relative to others.

In this pool, Belgium currently has 22 IPv4 servers and 18 IPv6-enabled ones.

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<div class="post-metadata">

**Author:** ![microchip8](https://sea2.discourse-cdn.com/flex016/user_avatar/community.ntppool.org/microchip8/32/1388_2.png) [@microchip8](https://community.ntppool.org/u/microchip8)\
**Post date:** [July 6, 2025, 2:56pm UTC](https://community.ntppool.org/t/ipv4-6-statistics/3841/24 "2025-07-06T14:56:31Z")

</div>

Here is what I’m seeing:

IPv4: [Imgur: The magic of the Internet](https://imgur.com/a/zWuv7rb)

IPv6: [Imgur: The magic of the Internet](https://imgur.com/a/3l31oL3)

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<div class="post-metadata">

**Author:** ![FAU-NTP](https://sea2.discourse-cdn.com/flex016/user_avatar/community.ntppool.org/fau-ntp/32/1517_2.png) [@FAU-NTP](https://community.ntppool.org/u/FAU-NTP)\
**Post date:** [July 16, 2025, 1:11pm UTC](https://community.ntppool.org/t/ipv4-6-statistics/3841/25 "2025-07-16T13:11:58Z")

</div>

Our statistics for ntp[0-3].fau.de (resp. ntp[0-3].ipv6.fau.de) go back quite a long time, and although they have some holes or errors, I think they’re still quite useful. And they paint a dire picture: IPv6 percentage has not only stagnated, it seems to go down ever so slightly.

 ![ntpALL-percentipv6-10years](https://us1.discourse-cdn.com/flex016/uploads/ntppool/original/2X/a/acb6a139b82767b0bc74116ad3c043a94575f2ea.png)

Regarding misbehaving clients (that run into our ratelimits): We see a lot less of these on IPv6, and I mean an order of magnitude less. They’re almost nonexistant on IPv6.

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<div class="post-metadata">

**Author:** ![marco.davids](https://sea2.discourse-cdn.com/flex016/user_avatar/community.ntppool.org/marco.davids/32/767_2.png) [@marco.davids](https://community.ntppool.org/u/marco.davids)\
**Post date:** [July 16, 2025, 1:20pm UTC](https://community.ntppool.org/t/ipv4-6-statistics/3841/26 "2025-07-16T13:20:44Z")

</div>

> [@FAU-NTP](#):
>
> ntp[0-3].fau.de

Excuse me, but… Where are the AAAA records for these FQDN’s ?

UPDATE:

Oh wait, you probably meant ntp[0-3].ipv6.fau.de ?

I wonder what would happen if you got rid of the ‘ipv6’ subdomain and just add the AAAA records to ntp[0-3].fau.de ?

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<div class="post-metadata">

**Author:** ![MagicNTP](https://avatars.discourse-cdn.com/v4/letter/m/858c86/32.png) [@MagicNTP](https://community.ntppool.org/u/MagicNTP)\
**Post date:** [July 16, 2025, 2:14pm UTC](https://community.ntppool.org/t/ipv4-6-statistics/3841/27 "2025-07-16T14:14:56Z")

</div>

> [@marco.davids](#):
>
> got rid of the ‘ipv6’ subdomain and just add the AAAA records to ntp[0-3].fau.de

Yeah, I was surprised to find that at first sight, those servers seemed not to support IPv6 even in 2025 (wouldn’t have been the only ones, though…). Took me a while to realize IPv6 addresses are behind a separate name. Where relevant, I now have two entries for this otherwise good (and NTS-enabled) upstream, rather than having just one entry and letting the daemon decide, or rotate over time. A bit of waste of resources on both ends.

> [@FAU-NTP](#):
>
> IPv6 percentage has not only stagnated, it seems to go down ever so slightly.

Like Marco, I also wonder what the picture would look like if the more intuitive names would also serve IPv6, rather than requiring the user to grasp that IPv6 is behind a different name, understand what the choice is all about, and then explicitly decide to configure a client accordingly with what are ultimately redundant entries.

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<div class="post-metadata">

**Author:** ![FAU-NTP](https://sea2.discourse-cdn.com/flex016/user_avatar/community.ntppool.org/fau-ntp/32/1517_2.png) [@FAU-NTP](https://community.ntppool.org/u/FAU-NTP)\
**Post date:** [July 16, 2025, 2:31pm UTC](https://community.ntppool.org/t/ipv4-6-statistics/3841/28 "2025-07-16T14:31:18Z")

</div>

> I also wonder what the picture would look like if the more intuitive names would also serve IPv6, rather than requiring the user to grasp that IPv6 is behind a different name, understand what the choice is all about, and then explicitly decide to configure a client accordingly with what are ultimately redundant entries.

It probably would not change much: Because most clients come from the ntppool, and NOT from our own hostnames.

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<div class="post-metadata">

**Author:** ![MagicNTP](https://avatars.discourse-cdn.com/v4/letter/m/858c86/32.png) [@MagicNTP](https://community.ntppool.org/u/MagicNTP)\
**Post date:** [July 16, 2025, 3:59pm UTC](https://community.ntppool.org/t/ipv4-6-statistics/3841/29 "2025-07-16T15:59:40Z")

</div>

Fair point. Unfortunately, the pool itself contributes to distorting the picture by only having one subdomain return IPv6 addresses.

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<div class="post-metadata">

**Author:** ![MagicNTP](https://avatars.discourse-cdn.com/v4/letter/m/858c86/32.png) [@MagicNTP](https://community.ntppool.org/u/MagicNTP)\
**Post date:** [July 26, 2025, 3:02pm UTC](https://community.ntppool.org/t/ipv4-6-statistics/3841/30 "2025-07-26T15:02:34Z")

</div>

EDIT: Regarding trustworthiness of NL figures, see EDIT after the figure. [end EDIT]

The Netherlands seem rather advanced in _actual_ IPv6 usage _of the pool_, with IPv6 traffic share currently at about 40% for an instance I recently added there, vs. just 26% IPv6 adoption rate according to Google (though there is _some_ skew _in favor_ of IPv6 in this case as I enabled IPv6 full throttle well before enabling IPv4 as well, and then ramped up the netspeed setting slowly only for IPv4 to [probe the conditions in this zone I didn’t have prior first-hand experience with](https://community.ntppool.org/t/many-probably-all-ntp-servers-in-the-philippines-dont-work/3440/14)). Maybe @marco.davids had a hand in promoting IPv6 NTP in the Netherlands despite the pool-side imbalance? 😉

 ![Screenshot from 2025-07-26 16-57-47](https://us1.discourse-cdn.com/flex016/uploads/ntppool/original/2X/f/f511f5ed7034bc10b6ebbd09ea8fc69ed95e1bd1.png)

The NL zone seems to be extremely well served in general, with a bitrate/packet rate of typically less than 400 kbit/s / 500 pps for both IPv6 and IPv4 at full throttle being the lowest by some margin among the country zones I have/had servers in so far. The best so far had been Germany, with typically less than about 1.3Mbit/s / 1900 pps with IPv6 and IPv4 both at full throttle, and after being in the pool for some time.

EDIT: I need to revisit my numbers for the Netherlands. They are too good to be true. Triggered by some other oddities, I now realize that the provider seems to employ some sort of DDoS protection, and likely for IPv4 only. It started with three monitors on the production system not getting through anymore, which I initially put down to some routing/connectivity issues. But now with the server added to the beta system with its much higher number of monitors, even more of them fail. It looks suspiciously as if a portion of the IPv4 NTP traffic might fall prey to the DDoS system, noticeably impacting the absolute number for IPv4 NTP, thus potentially and significantly skewing the IPv6/IPv4 ratio in favor of IPv6. Need to dig deeper, e.g., contact the provider. Also, for a “reality check”, I’d be interested to hear from other people with servers in the NL zone as to how much traffic they see, for both IPv6 and IPv4 in absolute numbers, as well as what their derived IPv6 share is. [end EDIT[

Neither is anything in comparison to, e.g., some Asian zones. E.g., SG with sustained bursts easily exceeding 10Mbit/s at a 12Mbit setting for IPv4 (IPv6 essentially negligible in comparison, even at full throttle netspeed setting). I faintly remember South Korea being similar, or even higher.

Which still is nothing compared to what has been reported for China, where a 512kbit netspeed setting, the lowest officially\* available, can apparently easily result in [double- or even triple-digit Mbit/s actual traffic](https://community.ntppool.org/t/the-issue-of-ntp-requests-exceeding-bandwidth-load/3588). Which would overwhelm any basic server not only in the Asia/Pacific region, where [not only bandwidth, but especially traffic volume is generally more expensive](https://community.ntppool.org/t/under-provisioned-countries/3727/5) than, e.g., in North America or Europe. It is interesting to see those differences in traffic costs based on cloud service provider offers. There is an [older explanation by Cloudflare](https://blog.cloudflare.com/bandwidth-costs-around-the-world/) as to the why, but a web search will also yield more recent examples and explanations.

E.g., I had to take an instance out of the MY zone recently as both its bandwidth limit as well as monthly traffic quota were easily exceeded even at a 1kbit netspeed setting for both IPv6 and IPv4. Malaysia as such seems to have a relatively high IPv6 adoption rate, but there are only 3 or 4 IPv6 servers in the zone. Which results in them being overloaded much of the busier time of the day. (I’ve seen short sustained peaks of above 3Mbit/s, which artificial bandwidth limits aside is ok for typical cloud infrastructure, but the corresponding packet rate may be [challenging, e.g., for typical consumer Internet routers](https://community.ntppool.org/t/joining-the-pool-kills-my-internet/1237).) I.e., the IPv6 servers are constantly phasing out of and into the pool so that there often is only a single server in the zone, or the pool even falls back to the Asia continent zone because there is _no_ active server in the country zone. And obviously, when a server is the only one active in a zone, the [netspeed setting is essentially irrelevant](https://community.ntppool.org/t/scores-increase-since-the-server-is-scheduled-for-deletion/3837)…

I was surprised, though, to see that a 12 Mbit IPv4 netspeed setting in India yields an average of slightly above 2Mbit/s only (and almost unnoticeable traffic at a 1kbit netspeed setting), given that some older threads in this forum referred to the IN zone as being underserverd as well (but maybe I misunderstood/misremember). Unfortunately (and strangely), none of my instances in India comes/came with IPv6. Would have been interesting to see what the IPv6 traffic share is in India, given the generally high IPv6 adoption rate there.

Typically less than 200kbit/s / 200 pps for IPv6 full throttle in Japan, with an IPv6 adoption rate of about 55% (according to Google), but I don’t have IPv4 there, so can’t say what the IPv6/IPv4 relation is, nor what the NTP traffic situation is overall. I got 800GB monthly traffic quota (in+out) for pretty much the lowest-end VPS conceivable there, but at just a few Euro more per year, I could easily get (and have) upper single- or double-digit TB traffic volume, or even unmetered, in Europe or North America.

\* I.e., from among the values offered by the server management page, without resorting to [low-level access to pool internal mechanisms](https://community.ntppool.org/t/under-provisioned-countries/3727/11).

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<div class="post-metadata">

**Author:** ![ChrisJ](https://sea2.discourse-cdn.com/flex016/user_avatar/community.ntppool.org/chrisj/32/1822_2.png) [@ChrisJ](https://community.ntppool.org/u/ChrisJ)\
**Post date:** [July 26, 2025, 5:44pm UTC](https://community.ntppool.org/t/ipv4-6-statistics/3841/31 "2025-07-26T17:44:03Z")

</div>

Another data point…

My server is in the UK, which apparently has around 51% IPv6 adoption and a similar level of ‘IPv6 preferred’. It has one IPv4 and one IPv6 address registered with the pool both with the default netspeed. I just monitored it for 10 minutes analysing the external NTP traffic (excluding traffic originating from my server or my local network). During that period there were:

8209 IPv4 requests  
989 IPv6 requests

So for that period ~12% of requests were via IPv6.

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<div class="post-metadata">

**Author:** ![richard](https://sea2.discourse-cdn.com/flex016/user_avatar/community.ntppool.org/richard/32/1473_2.png) [@richard](https://community.ntppool.org/u/richard)\
**Post date:** [July 28, 2025, 1:23am UTC](https://community.ntppool.org/t/ipv4-6-statistics/3841/32 "2025-07-28T01:23:32Z")

</div>

Another data point:

[APNIC ipv6 capability](https://blog.apnic.net/2025/04/23/ipv6-capability-reaches-50-in-the-asia-pacific-region/)

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<div class="post-metadata">

**Author:** ![marco.davids](https://sea2.discourse-cdn.com/flex016/user_avatar/community.ntppool.org/marco.davids/32/767_2.png) [@marco.davids](https://community.ntppool.org/u/marco.davids)\
**Post date:** [July 28, 2025, 6:27am UTC](https://community.ntppool.org/t/ipv4-6-statistics/3841/33 "2025-07-28T06:27:05Z")

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> [@ChrisJ](#):
>
> the UK, which apparently has around 51% IPv6 adoption
> 
> for that period ~12% of requests were via IPv6.

4 \* 12 = 48% if all DNS records in the pool would have had an AAAA record instead of just one ? 🤔

(or am I to optimistic now?)

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<div class="post-metadata">

**Author:** ![ChrisJ](https://sea2.discourse-cdn.com/flex016/user_avatar/community.ntppool.org/chrisj/32/1822_2.png) [@ChrisJ](https://community.ntppool.org/u/ChrisJ)\
**Post date:** [July 28, 2025, 7:18am UTC](https://community.ntppool.org/t/ipv4-6-statistics/3841/34 "2025-07-28T07:18:08Z")

</div>

@marco.davids That is the real question! Sadly we don’t know the answer. Definitely worth IPv6 enabling another one of the pools I think. Maybe 3? Or 0?

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<div class="post-metadata">

**Author:** ![ChrisJ](https://sea2.discourse-cdn.com/flex016/user_avatar/community.ntppool.org/chrisj/32/1822_2.png) [@ChrisJ](https://community.ntppool.org/u/ChrisJ)\
**Post date:** [July 31, 2025, 4:49pm UTC](https://community.ntppool.org/t/ipv4-6-statistics/3841/35 "2025-07-31T16:49:58Z")

</div>

I’ve been monitoring this for a while now and overall the percentage of IPv6 requests is actually only 8%, so a bit less than for the much smaller sample I did earlier.

A bit off topic but something else that I noticed is that while ~54% of requests originate from the UK (which is where my server is located), around 29% come from China, which seems insane. I’m guessing lazy people and/or device vendors just using [pool.ntp.org](http://pool.ntp.org) instead of [cn.pool.ntp.org](http://cn.pool.ntp.org) maybe.

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<div class="post-metadata">

**Author:** ![MagicNTP](https://avatars.discourse-cdn.com/v4/letter/m/858c86/32.png) [@MagicNTP](https://community.ntppool.org/u/MagicNTP)\
**Post date:** [July 31, 2025, 5:05pm UTC](https://community.ntppool.org/t/ipv4-6-statistics/3841/36 "2025-07-31T17:05:54Z")

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> [@ChrisJ](#):
>
> I’m guessing lazy people and/or device vendors just using [pool.ntp.org](http://pool.ntp.org) instead of [cn.pool.ntp.org](http://cn.pool.ntp.org) maybe.

Actually, from within China, they essentially amount to the same thing. [pool.ntp.org](http://pool.ntp.org) will give a client servers from the country zone the pool’s DNS server thinks the client is in. [cn.pool.ntp.org](http://cn.pool.ntp.org) will give a client servers from the CN zone, regardless of where the client is.

Also note that the pool itself _recommends_ for people to use the global zone rather than country zones ([“In most cases it’s best to use pool.ntp.org to find an NTP server”](https://www.ntppool.org/zone/cn/)).

Similarly for vendors of devices or software using the pool, [whom the pool urges to register a vendor zone](https://www.ntppool.org/vendors.html). Those vendor zones currently actually are kind of an alias for the global pool only, they just have their own name so that they _could_ get different handling should the need arise. But such differentiated handling would yet need to be implemented.

In fact, one of the reasons for not yet having IPv6 in more zones is that some legacy vendor zones are explicitly set up to _not_ have IPv6 in them, and adding IPv6 to more numbered subzones, or even the unnumbered zones, would implicitly change that. So the handling of vendor zones would need to be revamped to decouple them from the general zones before IPv6 can be added to additional general numbered subzones, or even the unnumbered general zones.

> [@ChrisJ](#):
>
> around 29% come from China, which seems insane

I guess this is for IPv4. The CN country zone is severely underserved, so I guess instead of getting very crappy service from servers in the local zone, people opt to explicitly solicit servers from better-served zones, even if those are far away.

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<div class="post-metadata">

**Author:** ![marco.davids](https://sea2.discourse-cdn.com/flex016/user_avatar/community.ntppool.org/marco.davids/32/767_2.png) [@marco.davids](https://community.ntppool.org/u/marco.davids)\
**Post date:** [August 1, 2025, 6:17am UTC](https://community.ntppool.org/t/ipv4-6-statistics/3841/37 "2025-08-01T06:17:24Z")

</div>

> [@ChrisJ](#):
>
> the percentage of IPv6 requests is actually only 8%

Again, with my poor math skills, I’d guess this would add up to ~32% if all pool names had an AAAA record.

Such a missed opportunity…

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<div class="post-metadata">

**Author:** ![jnd](https://sea2.discourse-cdn.com/flex016/user_avatar/community.ntppool.org/jnd/32/1594_2.png) [@jnd](https://community.ntppool.org/u/jnd)\
**Post date:** [August 5, 2025, 4:57pm UTC](https://community.ntppool.org/t/ipv4-6-statistics/3841/38 "2025-08-05T16:57:23Z")

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The clients are adapting to this reality. I find that recent Debian installs with chrony from various VPS providers tend to have default

```auto
pool 2.debian.pool.ntp.org iburst

```

so the end users are steered towards IPv6 when possible.

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<div class="post-metadata">

**Author:** ![MagicNTP](https://avatars.discourse-cdn.com/v4/letter/m/858c86/32.png) [@MagicNTP](https://community.ntppool.org/u/MagicNTP)\
**Post date:** [August 5, 2025, 6:05pm UTC](https://community.ntppool.org/t/ipv4-6-statistics/3841/39 "2025-08-05T18:05:13Z")

</div>

> [@jnd](#):
>
> recent Debian installs with chrony from various VPS providers tend to have default

Yes, fortunately, this is being picked up by more and more distributions, so at least new installations will have this.

At the same time, NTPsec shipped with Debian (and probably Ubuntu as well) [uses all four numbered zones](https://salsa.debian.org/debian/ntpsec/-/blob/debian/unstable/debian/ntp.conf?ref_type=heads#L35), with only a `tos maxclock 11` stance limiting the number of servers solicited. So somewhat biased against IPv6.

[Same for the standard BusyBox-based `sysntpd` on OpenWrt](https://github.com/openwrt/openwrt/blob/bf917ea792d890f7ea431bd3dffb763c231857e0/package/base-files/files/bin/config_generate#L326), which I believe is also picked up by the `ntpd` classic package, and the `ntpdate` package derived from the `ntpd` classic sources. The latter has [all four numbered vendor zones as fallback](https://github.com/openwrt/packages/blob/e9861d554c810d2b89f79beacaecfa64edfcc001/net/ntpd/files/ntpdate.init#L6), while `chronyd` on the other hand comes with [its own IPv6-enabled default configuration](https://github.com/openwrt/packages/blob/e9861d554c810d2b89f79beacaecfa64edfcc001/net/chrony/files/chrony.config#L2).

Tasmota is using [IPv6-enabled zones as default](https://github.com/arendst/Tasmota/blob/5bd9414012d547c63f7e939468aaa4dd34ebf08c/tasmota/my_user_config.h#L251). Which is interesting as [only a subset of devices has support for IPv6 enabled](https://tasmota.github.io/docs/IPv6/) in default builds. Interesting as well that they don’t seem to have a vendor zone (see last paragraph below). And they don’t only use the global zone, but additionally the `2.europe.pool.ntp.org` and `2.nl.pool.ntp.org` continent/country zones, I guess to ensure the devices get time wherever they are in the world, even in severely underserved or [somewhat broken country zones](https://community.ntppool.org/t/many-probably-all-ntp-servers-in-the-philippines-dont-work/3440).

Would be interesting to see what systems coming with `systemd-timesyncd` use by default, probably depends on the distribution and how they customize this. I currently don’t have such a system at hand I could quickly check for this (replacing `timesyncd` typically is one of the very first things I do on a new system, will check next time this comes up).

Anyone installing OpenNTPD from the Debian repositories probably is getting [pool.ntp.org by default](https://salsa.debian.org/debian/openntpd/-/blob/master/ntpd.conf?ref_type=heads#L5) (seems the package hasn’t been updated in quite a while, though…).

Default in `ntpd-rs` seems to be the [un-numbered vendor zone](https://github.com/pendulum-project/ntpd-rs/blob/main/ntp.toml) as well, though they at least mention which numbered generic, i.e., non-vendor pool zone to use for getting IPv6 servers as well (though misleadingly mentioning this with reference to IPv6-only machines only), as the vendor zone does not support IPv6 at all (see next paragraph).

And new vendor zones, [if one can be obtained at all](https://community.ntppool.org/t/drop-the-vendor-zone-requirement/3184), apparently are [IPv4-only by default](https://community.ntppool.org/t/ipv6-addresses-for-new-vendor-zone-are-not-responding/3785/4), and it seems [somewhat difficult to get IPv6 added later on even on request](https://community.ntppool.org/t/ipv6-addresses-for-new-vendor-zone-are-not-responding/3785/9). So if vendors take the vendor zone topic seriously, potentially a lot of _new_ devices/software installations will be IPv4 only.

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<div class="post-metadata">

**Author:** ![marco.davids](https://sea2.discourse-cdn.com/flex016/user_avatar/community.ntppool.org/marco.davids/32/767_2.png) [@marco.davids](https://community.ntppool.org/u/marco.davids)\
**Post date:** [August 5, 2025, 6:50pm UTC](https://community.ntppool.org/t/ipv4-6-statistics/3841/40 "2025-08-05T18:50:37Z")

</div>

> [@MagicNTP](#):
>
> Default in `ntpd-rs` seems to be the [un-numbered vendor zone](https://github.com/pendulum-project/ntpd-rs/blob/main/ntp.toml) as well, though they at least mention which numbered generic, i.e., non-vendor pool zone to use for getting IPv6 servers as well (though misleadingly mentioning this with reference to IPv6-only machines only), as the vendor zone does not support IPv6 at all (see next paragraph).

Interesting, I am learning things here that I didn’t know!

> [@](#):
>
> And new vendor zones, [if one can be obtained at all](https://community.ntppool.org/t/drop-the-vendor-zone-requirement/3184), apparently are [IPv4-only by default](https://community.ntppool.org/t/ipv6-addresses-for-new-vendor-zone-are-not-responding/3785), and it seems [not possible to get IPv6 added later on even on request](https://community.ntppool.org/t/ipv6-addresses-for-new-vendor-zone-are-not-responding/3785/9). So if vendors take the vendor zone topic seriously, potentially a lot of _new_ devices/software installations will be IPv4 onl

Shocked to hear this - why is it? 🙁

I’ll give it a try anyway and just created [this issue](https://github.com/pendulum-project/ntpd-rs/issues/1943).

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