Autonomous system
AS112 AS112-PROJECT
Unclassified ARIN
Summary
AS112 Project
research legacy
The AS112 Project (AS112-PROJECT), a cooperative, volunteer-run anycast service that absorbs reverse-DNS and other queries for private and otherwise non-routable address space so they don't burden the root and public DNS.
What it's used for
- Answering reverse-DNS (PTR) and dynamic-update queries for RFC 1918 private ranges and similar special-use address space, as a distributed sink.
Notable
- Not an organization's network at all: many independent operators run AS112 nodes worldwide under the same AS number, using anycast. The low AS number fits its long history as early internet infrastructure.
Interesting
- A rare case where the same AS number is deliberately announced from many unrelated networks around the globe.
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 145 exchanges in 48 countries, largest first.
| Exchange | Location | Their address |
|---|---|---|
| 4b42 Internet Exchange Point | Zurich, Switzerland | 185.1.125.112 |
| DE-CIX Frankfurt | Frankfurt, Germany | 80.81.197.112 |
| AMS-IX Amsterdam | Amsterdam, Netherlands | 80.249.208.39 |
| Neutral Internet Exchange | Amsterdam, Netherlands | 193.239.117.181 |
| France-IX Paris | Paris, France | 37.49.236.37 |
| EPIX.Katowice | Katowice, Poland | 178.216.42.115 |
| MSK-IX Moscow | Moscow, Russia | 195.208.209.248 |
| The Frys Internet Exchange | Frysian, Netherlands | 2001:7f8:10f::70:252 |
Transit providers
39 upstream, 0 downstream and 59 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 2026-10-10, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 2 prefixes · 512 addresses IPv6 2 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 4 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS112- Registry name
- AS112-PROJECT
- Registrant
- DNS-OARC
- Abuse contact
- abuse@dns-oarc.net
- Registered
- 2002-03-19
- Last changed
- 2026-04-22
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 100% valid · 4 valid, 0 with no ROA
- ROAs
- 4 authorising AS112
- ASPA
- no ASPA record
- IRR
- 100% registered · 4 of 4 announcements
- Route objects
- 12 naming AS112
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
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 1,775 prefixes, as published 2026-10-11. 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