Autonomous system
AS10908 CLOUDFLOORAS
Hosting ARIN
Summary
CloudfloorDNS
hosting legacy
CLOUDFLOORAS-0 is CloudfloorDNS, a managed DNS provider. Its routing is unusually legible: this AS exists to carry authoritative nameservers, and almost nothing else.
What it's used for
DNS service. RIS shows 4 announced IPv4 prefixes totalling 1,024 addresses, 4 announced IPv6 prefixes (four /48s carved from 2620:1f::), and 1 observed neighbour.
The reverse DNS makes the purpose unambiguous. Every sampled address in every prefix resolves to a nameserver name, and the pattern is systematic: 199.73.82.x is ns1..cfdns.net, 199.73.83.x is ns2..cfdns.biz, 204.138.102.x is ns3..cfdns.info, and 192.188.176.x is ns4..cfdns.co.uk. One /24 per nameserver identity, and the last octet appears inside the hostname, so the whole block is generated as nameserver space rather than assigned host by host.
Spreading ns1 through ns4 across four different top-level domains, and four separate address blocks, is deliberate resilience engineering. A zone's delegation survives the loss of any one TLD's infrastructure, any one prefix, or any one registrar problem, which is precisely the failure mode a managed DNS provider is paid to avoid.
Notable
Judged by address count this is a tiny network, a thousand addresses. Judged by function it is the sort of network whose outage takes customer domains off the internet entirely, since a nameserver that cannot be reached is indistinguishable from a domain that does not exist.
Interesting
The clean one-block-per-nameserver layout is what lets DNS providers announce the same addresses from many locations at once. The size of the address space says nothing about the number of physical sites behind it.
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
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Transit providers
1 upstream, 0 downstream and 2 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS36236 | NetActuate, Inc | 380 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-26, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 3 prefixes · 1.02K addresses IPv6 4 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 7 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS10908- Registry name
- CLOUDFLOORAS-0
- Registrant
- CloudfloorDNS
- Abuse contact
- jeff.cronstrom@cloudfloordns.com
- Registered
- 2011-03-14
- Last changed
- 2025-08-19
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 8 with no ROA
- ROAs
- 0 authorising AS10908
- ASPA
- no ASPA record
- IRR
- 100% registered · 8 of 8 announcements
- Route objects
- 10 naming AS10908
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: 445 networks and 1,817 prefixes, as published 2026-10-27. 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