asn.dev

Autonomous system

AS5237 DNIC-ASBLK-05120-05376

Unclassified ARIN

IPv4 addresses 1.54K 5 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly US
Flagged prefixes 0 none

Summary

US Department of Defense

United States · AI-generated

government military legacy

A US Department of Defense network from the block DNIC-ASBLK-05120-05376,

registered to the DoD Network Information Center (DNIC).

What it's used for

  • Operational US Navy networking. Nearly all of the space it originates comes from legacy 205.x blocks registered to the Navy Network Information Center (NNIC).

Notable

  • A government / military network, not a commercial ISP or host.
  • The ASN registration is generic to the DoD block, so no specific base or unit is publicly identified. The Navy attribution comes from the registration of the address blocks it announces.
  • A small footprint — a handful of /24s — compared to the larger Navy ASNs in the same block.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.

Address space

Summary

Full explorer
CountryNamePrefixes
USUnited States of America5

Registry

Allocation record

via ARIN RDAP
Registry
ARIN
Handle
AS5120
Registry name
DNIC-ASBLK-05120-05376
Registrant
United States Department of Defense (DoD)
Abuse contact
disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil
Registered
1995-05-09
Last changed
2025-09-12
Status
active

Reputation

Classification and threat

Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.

No IC3 indicators Nothing from the FBI IC3 feed.

Threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.

Elsewhere

Cross-check