ResearchIRR · ALTDB, ARIN

AS-DNS1 Global DNS anycast

An as-set registered in ALTDB, ARIN, maintained by MAINT-DNS, MNT-UL-16. It names 1 AS and 0 sets directly; followed all the way down, it reaches 1 ASes through 0 nested sets.

Members

What AS-DNS1 lists

1 AS and 0 sets, written in the object across every registry that holds it. Sets open their own page.

AS26021 AS-DNS3
Expanded

Every AS it reaches

What a filter built from AS-DNS1 would let in: 1 ASes.

Show the 1 ASes
AS26021
Prefixes

What AS-DNS1 covers

Every route object in the IRR whose origin is one of the 1 ASes it reaches: the prefixes a filter built from AS-DNS1 (with bgpq4, say) would allow. 3 IPv4 and 3 IPv6. Every one is in the IRR API.

3 IPv4 prefixes
104.153.180.0/23104.153.180.0/24104.153.181.0/24
3 IPv6 prefixes
2620:11c:a000::/472620:11c:a000::/482620:11c:a001::/48
Registries

Each registry’s copy

ALTDB1 membersGlobal DNS anycast
Maintained byMAINT-DNS
Last modified2026-08-11
MembersAS26021
mbrs-by-refN
ARIN1 membersGlobal Anycast (A/B)
Maintained byMNT-UL-16
Last modified2026-08-11T18:08:22Z
MembersAS26021
mbrs-by-refN
Used by

Sets that include AS-DNS1

AS-4IXPAS212635:AS-BGP-EXCHANGE-FRANKFURT-RSAS212635:AS-BGP-EXCHANGE-ZURICH-RS
Tools

Check AS-DNS1 live

IRR API, with prefixes