Autonomous system
AS13506 US-DEPARTMENT-OF-THE-TREASURY
Unclassified ARIN
Summary
United States Department of the Treasury
government finance infrastructure
Two /16-sized ranges cut into twenty-four announcements, all under one netname, and nothing answering in DNS.
What it's used for
- A federal government department's network. 131,072 addresses across twenty-four IPv4 prefixes, two IPv6 /40s, and two observed BGP neighbours.
Notable
- Every block is netname
US-DEPARTMENT-OF-THE-TREASURY, matching the AS handle exactly. - The announcements split
164.95and166.123into every size from a /17 down to /24s. - Eighteen addresses were queried for reverse DNS and none returned a name.
Interesting
- Twenty-four routes out of two ranges, through only two upstreams, is fragmentation with no traffic engineering benefit visible from outside. What it does give is a specific announcement for every piece, so no part of the space can be announced by somebody else without an obvious conflict.
- A department this size having only two neighbours means its connectivity is bought through a small number of authorised paths rather than peered widely. Government networks are gated at the edge on purpose, and the routing table shows the gate.
- Not one sampled address answering, across 131,072 of them, is a reverse zone that was never populated or is not served publicly. For most organisations that is neglect; here it is consistent with publishing nothing that is not required.
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.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-27, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 24 prefixes · 131K addresses IPv6 2 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 26 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS13506- Registry name
- US-DEPARTMENT-OF-THE-TREASURY
- Registrant
- United States Department of the Treasury
- Abuse contact
- soc@soc.treasury.gov
- Registered
- 1999-06-23
- Last changed
- 2014-09-22
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 80% valid · 8 valid, 2 with no ROA
- ROAs
- 12 authorising AS13506
- ASPA
- no ASPA record
- IRR
- 100% registered · 10 of 10 announcements
- Route objects
- 22 naming AS13506
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: 446 networks and 1,852 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