_model: product
---
_discoverable: yes
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_hidden: no
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title: The IPv6 ULA registry
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subtitle: The IPv6 ULA registry is back!
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image: /u/image/cards/advent-6.jpg
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header_background_color: #C12107
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header_text_color: text-light
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nav_classes: navbar-dark
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headline1: IPv6 ULA registry
---
headline2: After 3 years
---
headline3: Back after sunset
---
content1_text:

## Happy St Nicholas Day

For St Nicholas Day we present you with something that has been
requested from the IPv6 community for a while: [A new IPv6 ULA
registry](https://ula.ungleich.ch). We have imported all the original
prefixes from SixXs. The following URLs might be helpful:

* [The new IPv6 ULA registry](https://ula.ungleich.ch)
* [The Hack4Glarus development
  ticket](https://redmine.ungleich.ch/issues/8673)
* [The ipv6ula open source project hompage](/u/projects/ipv6ula/)
* [The announcement on the IETF mailing list](https://mailarchive.ietf.org/arch/msg/ipv6/fFpPHY55pwKlEopyyAZyZI8azg0/)

## Background

The [original IPv6 ULA
registry](https://www.sixxs.net/tools/grh/ula/list/) was maintained by
SixXS. However with the sunset event of SixXS on 2017-06-06, the
database has essentially become static.

At this point we want to say many, many thanks to the SixXS project for
having provided so much pioneer work and for having enabled people in
embracing IPv6.

Also for providing such an early and machine-readable database - it
was a pleasure importing all the historic records.

We try to continue the effort that SixXS started many years ago,
just in a different era. If you have any questions or comments, feel
free to join the [IPv6.Chat](https://IPv6.Chat).