Autonomous system
AS5939 AS5939
Unclassified ARIN
Summary
US Department of Defense — US Navy
government military legacy
A US Department of Defense network from the block DNIC-ASBLK-05800-06055, registered to the DoD Network Information Center (DNIC). Its two large prefixes are registered to the Navy Network Information Center (NNIC).
What it's used for
- US Navy shore-side networking. Its main blocks carry the netnames
CNET-PCOLA(160.125.0.0/16) andCNET-SDIEGO(160.128.192.0/18), pointing at Navy education and training sites around Pensacola, Florida and San Diego, California. - Roughly 82,000 IPv4 addresses in total, dominated by that single legacy
/16.
Notable
- A government / DoD network, not a commercial ISP or host.
- The registration is one of the few in the DNIC block that names a service rather than just "Department of Defense" — the Navy ran its own NIC, and the netnames survive from that era.
- Part of a contiguous run of ASNs (5800–6055) held by the DoD Network Information Center.
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 1 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS27064 | United States Department of Defense (DoD) | 240 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-20, 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 · 82.43K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| Unknown | 4 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS5800- Registry name
- DNIC-ASBLK-05800-06055
- Registrant
- United States Department of Defense (DoD)
- Abuse contact
- disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil
- Registered
- 1995-10-24
- Last changed
- 2025-09-12
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 4 with no ROA
- ROAs
- 0 authorising AS5939
- ASPA
- no ASPA record
- IRR
- 0% registered · 0 of 4 announcements
- Route objects
- 0 naming AS5939
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: 442 networks and 1,779 prefixes, as published 2026-10-21. 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