Autonomous system detail

AS89

Announced

Operated by DNIC-AS-00089 - Navy Network Information Center (NNIC).

Summary

// analyst note
A government/military legacy DNIC allocation that — unlike many dormant DNIC numbers — IS actively announcing via DREN (AS668). Clean. Navy NNIC pool sibling of AS22/AS48/AS84.
// security note
NEUTRAL/DATED: no notable public abuse signal found as of 2026-06-08.
IPv4 prefixes
6
~133.1K addresses
IPv6 prefixes
0
—
Peer networks
1
1 up · 0 down
IANA block
1-1876
Assigned by ARIN
[ 01 ] — Context

About this ASN.

Updated  ·  Confidence: High

AS89 is a legacy DoD/DNIC allocation registered under ARIN to the Navy Network Information Center (NNIC, OrgId NNICN-1, Virginia Beach, VA), carrying the handle "DNIC-AS-00089." RFC 1020/1166 recorded this number as "NUSC-CSTLNET-AS" — the Naval Underwater Systems Center "Castle Net" (NUSC, headquartered in Newport, RI, was folded into the Naval Undersea Warfare Center in 1992); both historical and current holders are U.S. Navy, a coherent lineage, and bgp.tools labels it "DoD Naval Undersea Warfare." Unlike many DNIC numbers that are registered-but-dormant, AS89 is actively announcing six IPv4 prefixes (129.190.0.0/16, 164.223.0.0/16, 198.97.81.0/24, 198.97.82.0/23, 198.97.84.0/22, 198.97.88.0/24), with its sole upstream being AS668 (DoD High Performance Computing / DREN). The ARIN RDAP RegDate is 1986-11-12. It sits in the same Navy DNIC pool as AS22, AS48, and AS84. For triage this is a clean government/military legacy allocation that is genuinely active via DREN. 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 RDAP RegDate 1986-11-12 [Confirmed]
Org status
active

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-06-08 — bgp.tools

Network & routing

Network type
government / military (U.S. Navy) [Confirmed]
Size
6 IPv4 prefixes (~133,000+ addrs), 0 IPv6 — bgp.tools / bgpview.io (2026-06)
Routing/peering
actively announcing; sole upstream AS668 (DoD HPC / DREN); RPKI unknown — bgp.tools
Notable usage
[historical, RFC 1020] AS89 "NUSC-CSTLNET-AS" (Naval Underwater Systems Center "Castle Net," Newport RI; folded into Naval Undersea Warfare Center 1992). [current] Navy Network Information Center; bgp.tools labels "DoD Naval Undersea Warfare" — navsea.navy.mil
Related ASNs
Navy NNIC DNIC pool — AS22, AS48, AS84; upstream AS668 (DREN) [Confirmed]
Analyst note
A government/military legacy DNIC allocation that — unlike many dormant DNIC numbers — IS actively announcing via DREN. Clean.
[ 02 ] — Announced prefixes

What this network routes.

6 prefixes total · RIPEstat data · cached, not real-time
// IPv4 prefixes6
  1. 129.190.0.0/16/16
  2. 164.223.0.0/16/16
  3. 198.97.84.0/22/22
  4. 198.97.82.0/23/23
  5. 198.97.81.0/24/24
  6. 198.97.88.0/24/24
// IPv6 prefixes0
No IPv6 prefixes announced.
[ 03 ] — Notable peers & upstreams

Who it talks to.

1 observed neighbour
// Notable connectionsTop 1 of 1
ASNOperatorRole
AS668 — upstream
Neighbours observed via public BGP collectors; not a complete peering list.