# Measurement differences over IPv4 vs IPv6 **URL:** \ **Category:** Server operators\ **Created:** [June 2, 2021, 12:00pm UTC](https://community.ntppool.org/t/measurement-differences-over-ipv4-vs-ipv6/2023 "2021-06-02T12:00:17Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![hugo](https://avatars.discourse-cdn.com/v4/letter/h/b38774/32.png) [@hugo](https://community.ntppool.org/u/hugo)\ **Post date:** [June 2, 2021, 12:00pm UTC](https://community.ntppool.org/t/measurement-differences-over-ipv4-vs-ipv6/2023/1 "2021-06-02T12:00:18Z")
I noticed that our comnpanies NTP server was having issues. Then I started to see issues on my home NTP server but only over IPv4. Over IPv6 both NTP servers at home are doing just fine. You can see this on [pool.ntp.org: Statistics for 46.243.43.43](https://www.ntppool.org/scores/46.243.43.43) and [pool.ntp.org: Me Organized?'s pool servers](https://www.ntppool.org/a/hvdkooij) Could this be an issue with the monitoring server? Has anyone else noticed similar issues? ---
**Author:** ![NTPman](https://sea2.discourse-cdn.com/flex016/user_avatar/community.ntppool.org/ntpman/32/450_2.png) [@NTPman](https://community.ntppool.org/u/NTPman)\ **Post date:** [June 2, 2021, 12:29pm UTC](https://community.ntppool.org/t/measurement-differences-over-ipv4-vs-ipv6/2023/2 "2021-06-02T12:29:18Z")
@hugo , welcome to the community! Yes, there are certain networks, which are having connectivity issue with the main monitoring location over IPv4. It isn’t a problem with the monitoring server itself. All that is rather well-known, you may find multiple threads about that issue. ---
**Author:** ![hugo](https://avatars.discourse-cdn.com/v4/letter/h/b38774/32.png) [@hugo](https://community.ntppool.org/u/hugo)\ **Post date:** [June 2, 2021, 1:08pm UTC](https://community.ntppool.org/t/measurement-differences-over-ipv4-vs-ipv6/2023/3 "2021-06-02T13:08:26Z")
Are there plans to add more monitoring servers?