AS37

AS37 is a legacy U.S. government allocation registered under ARIN to the Navy Network Information Center (NNIC) in Virginia Beach, VA, under the Department of Defense's DNIC numbering scheme (handle DNIC-AS-00037). Early NIC lists associate this number with Navy/defense use (for example, the Naval Surface Warfare Center), and the registry holder has since consolidated to the Navy NIC entity. Contrary to a common assumption that DNIC legacy numbers are dark, AS37 is actively announcing in 2026: it originates about 17 IPv4 prefixes and 1 IPv6 prefix (~72,704 IPv4 addresses), visible to essentially all RIS full-feed peers, via a single observed BGP neighbor (DoD/DREN, AS668). The ARIN ASN RegDate of 1985-01-04 is the registry date (updated 2011-07-05). For triage this is a live DoD/Navy DNIC-series network, not a dark registry entry; it shares the NNIC operator with AS22 and AS48. No notable public abuse signal was found as of June 2026.

Operator

Navy Network Information Center (NNIC; ARIN OrgId NNICN-1, Virginia Beach, VA) [Confirmed] — ARIN RDAP

Country / RIR

US, ARIN [Confirmed]

Allocated

ARIN ASN RegDate 1985-01-04 (registry date; updated 2011-07-05) [Confirmed] — ARIN RDAP

Org status

active organization (DoD/Navy); ASN actively routed

Security/abuse context (NEUTRAL, DATED)

government allocation; no notable public abuse signal found as of 2026-06-09 — bgpview.io

Network & routing

Network type

government / military (U.S. Navy / DoD) [Confirmed]

Size

actively announcing ~17 IPv4 prefixes (~72,704 addrs) + 1 IPv6 prefix — RIPEstat / ipapi.is (2026-06)

Routing/peering

active; 1 observed BGP neighbor (DoD/DREN AS668, per AS668 RADB import policy); visible to ~100% of RIS full-feed peers; RPKI unknown — stat.ripe.net/resource/AS37, bgpview.io

Notable usage

[historical] early NIC lists associate this number with Navy/defense use (e.g., Naval Surface Warfare Center). [current] held by the Navy Network Information Center under DoD's DNIC scheme (DNIC-AS-00037); actively announcing — navy.mil

Related ASNs

AS22 and AS48 (also Navy Network Information Center); broader DoD DNIC-AS series; transit via AS668 (DoD/DREN) [Confirmed/Likely]

Analyst note

A live DoD/Navy DNIC-series ASN (not dark) — actively announcing ~17 IPv4 + 1 IPv6 via a single DoD neighbor (AS668).