Autonomous system
AS13925 NULLROUTE
Unclassified ARIN
Summary
Null Route Networks
infrastructure research
An AS named after the place packets go to die, announcing amateur radio address space.
What it's used for
- A small operator peering widely. 1,536 addresses across two IPv4 prefixes, two IPv6 prefixes, and seven observed BGP neighbours.
Notable
- One block is
44.4.64.0/22, netnameAMPRNET, registered toAmateur Radio Digital Communications. - The other is
23.131.160.0/23, netnameNET23, registered toAmerican Registry for Internet Numbers. - The IPv6 prefixes are
2001:470:f6::/48and2620:138:5000::/47. - Six addresses were queried for reverse DNS and none returned a name.
Interesting
- Seven peers for this little space is the ratio of a network that exists to connect rather than to serve. Space is cheap to announce and peering is where the work is, so an operator at an exchange can carry more neighbours than addresses without anything being unusual.
- Amateur radio address space predates the commercial internet and is administered by the radio community rather than sold. A block from it announced alongside ordinary space is one operator bridging the two, which is most of what that range is used for now.
- The second block still names the registry as its holder, so the record was issued and never completed while the addresses route perfectly well regardless.
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 1 exchange in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| Fremont Cabal Internet Exchange | Fremont, United States | 206.80.238.4 |
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 · 1.54K addresses IPv6 2 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 4 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS13925- Registry name
- NULLROUTE
- Registrant
- Null Route Networks
- Abuse contact
- netops@nullroutenetworks.com
- Registered
- 2018-05-07
- Last changed
- 2018-05-07
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 83% valid · 5 valid, 1 with no ROA
- ROAs
- 4 authorising AS13925
- ASPA
- no ASPA record
- IRR
- 100% registered · 6 of 6 announcements
- Route objects
- 11 naming AS13925
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