Autonomous system
AS42909 COMMUNITYDNS
Hosting RIPE
Summary
CommunityDNS
dns anycast infrastructure uk
COMMUNITYDNS is operated by CommunityDNS Ltd.
What it's used for
- The address space carries DNS infrastructure, evidenced by reverse DNS entries such as
ns64.cdns.net,ns127.cdns.net, andb1-64.cdns.net. - The AS announces 1280 IPv4 addresses and 2 IPv6 prefixes, peering with 52 neighbours, a ratio consistent with a specialized service provider rather than a mass-access ISP.
- Traffic consists of DNS queries and responses, leveraging anycast deployment for global reach and resilience.
Notable
- Registrants include Community DNS Ltd., Internet Computer Bureau Ltd., and TM Domain Registry Ltd., with netnames
ONEWORLDDNS,ICB-CO-UK, andTM-ANYCAST. - The inventory includes legacy prefixes from Internet Computer Bureau and TM Domain Registry, indicating historical acquisitions or space leasing.
- The address inventory is finely subdivided into four IPv4 prefixes, supporting the anycast model across multiple data centres.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
Recorded at 16 exchanges in 14 countries, largest first.
| Exchange | Location | Their address |
|---|---|---|
| OpenIXP Internet exchange Point | Jakarta, Indonesia | 218.100.27.234 |
| MSK-IX Moscow | Moscow, Russia | 195.208.208.68 |
| Singapore Internet Exchange | Singapore, Singapore | 103.16.102.68 |
| SwissIX | Zurich, Switzerland | 91.206.52.87 |
| IX.br (PTT.br) Curitiba | Curitiba, Brazil | 45.184.146.90 |
| Johannesburg Internet Exchange | Johannesburg, South Africa | 196.60.96.136 |
| Internet Exchange Point of Nigeria - Lagos | Lagos, Nigeria | 196.216.148.29 |
| New Zealand Internet Exchange Auckland | Auckland, New Zealand | 43.243.21.21 |
Transit providers
21 upstream, 0 downstream and 30 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-11, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 4 prefixes · 1.28K addresses IPv6 2 prefixes
| Country | Name | Prefixes |
|---|---|---|
| GB | United Kingdom | 6 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS42909- Registry name
- COMMUNITYDNS
- Registrant
- CDNS-MNT
- Abuse contact
- abuse@cdns.net
- Registered
- 2007-05-09
- Last changed
- 2020-05-26
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 50% valid · 4 valid, 4 with no ROA
- ROAs
- 8 authorising AS42909
- ASPA
- no ASPA record
- IRR
- 100% registered · 8 of 8 announcements
- Route objects
- 20 naming AS42909
Reputation
Classification and threat
Hosting Datacenter or cloud provider. Addresses are servers, not people.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 431 networks and 1,768 prefixes, as published 2026-10-12. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere