AS242

AS242 is a legacy autonomous system number registered under ARIN to SUPSHIP — the Supervisor of Shipbuilding, Conversion and Repair, San Diego, a field activity of the U.S. Navy's Naval Sea Systems Command (NAVSEA). It was allocated on 1988-10-03 and last changed on 1991-01-10, placing it firmly among the earliest internet-era allocations made for internal U.S. military use. The key triage point for AS242 is that it is effectively dormant today: every routing source consulted (ARIN RDAP, RIPEstat, CAIDA AS Rank) agrees it announces zero IPv4 and zero IPv6 prefixes, has zero visible BGP peers, zero upstreams, zero customers, and no IXP memberships. RIPEstat shows 0 of 327 IPv4 RIS peers and 0 of 324 IPv6 RIS peers seeing it, with no first-seen or last-seen routing history across the August 2000 to June 2026 window. Its CAIDA AS rank of 79,459 sits near the bottom of the global ranking, reflecting complete routing inactivity, and its customer cone is a singleton (the ASN itself, 0 prefixes, 0 addresses). The sole point of contact, Robert G. Hesser (RGH21-ARIN), has been flagged by ARIN as Unvalidated since 2010-06-20. SUPSHIP San Diego no longer appears among NAVSEA's four active SUPSHIP commands (Bath, Groton, Gulf Coast, Newport News). RPKI posture cannot be assessed because there are no active originations and therefore no ROAs. No notable public abuse signal was found as of June 2026 — not in Spamhaus ASN-DROP, AbuseIPDB, the C0nw0nk community ASN blacklist, or NANOG archives — consistent with a clean, dormant ASN that carries no routed address space.

Operator

SUPSHIP (Supervisor of Shipbuilding, Conversion and Repair, San Diego; ARIN org handle SUPSHI; U.S. Navy NAVSEA field activity) [Confirmed] — ARIN RDAP, whois.arin.net/rest/org/SUPSHI.json

Country / RIR

US, ARIN [Confirmed] — ARIN RDAP; RIPEstat abuse-contact-finder (authoritative_rir: arin)

Allocated

1988-10-03 (ARIN RDAP autnum top-level registration event, NOT an IEEE date — IEEE publishes no ASN registration dates); last changed 1991-01-10 [Confirmed] — ARIN RDAP autnum top-level events

Org status

inactive / dormant government ASN. The registrant org (SUPSHI in ARIN) was registered 1988-08-18 and last updated 2012-10-10; the ASN record itself was registered 1988-10-03 and last changed 1991-01-10. SUPSHIP San Diego has been consolidated under other NAVSEA SUPSHIP offices; no active BGP, no IP prefixes

[Confirmed] — ARIN RDAP, whois.arin.net/rest/org/SUPSHI.json

Contacts

Robert G. Hesser (RGH21-ARIN), +1-619-235-1275, SUPSHIP Naval Station, Box 119, San Diego, CA 92136-5119; org address Box 368119, 3600 Surface Navy Blvd, San Diego, CA 92136-5066. POC marked Unvalidated by ARIN since 2010-06-20; no abuse contact returned by RIPEstat [Confirmed] — ARIN RDAP

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-06-20 — not in Spamhaus ASN-DROP (list begins at AS245), AbuseIPDB (HTTP 404, no record), the C0nw0nk community ASN blacklist, or NANOG archives; CleanTalk returned HTTP 403 (no data). Dormant ASN with zero routed address space — spamhaus.org/drop/asndrop.json, abuseipdb.com/network/as242

Network & routing

Network type

U.S. Federal Government / U.S. Navy military network; AS242 is legacy/inactive, registered ~1988 for internal Navy use at the SUPSHIP San Diego facility [Confirmed] — ARIN RDAP, ipinfo.io/AS242, bgp.he.net/AS242

Size

dormant — 0 IPv4 prefixes / 0 IPv4 addresses and 0 IPv6 prefixes; customer cone = 1 ASN (itself), 0 prefixes, 0 addresses — RIPEstat routing-status / CAIDA AS Rank (2026-06)

Routing/peering

NOT announced — 0 RIS peers seeing it (0/327 v4, 0/324 v6); CAIDA degree total 0 (customer 0, peer 0, provider 0); no upstreams or peers visible in any source; no BGP first-seen/last-seen history [Confirmed]. No PeeringDB record (HTTP 404); peering policy Unknown and moot for an inactive ASN [Confirmed]

RPKI

not assessable — AS242 announces no prefixes, so there are no ROAs to validate; RIPEstat rpki-validation skipped (no prefix to validate against) [Confirmed]

Notable usage

AS242 was registered 1988-10-03 for SUPSHIP San Diego, a U.S. Navy command co-located with private shipbuilders at Naval Station San Diego. It has never appeared in global BGP routing tables and carries no IP address blocks. SUPSHIP San Diego as a standalone command no longer appears among NAVSEA's four active SUPSHIPs (Bath, Groton, Gulf Coast, Newport News) — ARIN RDAP, navsea.navy.mil/Home/SUPSHIP

Related ASNs

none identified in routing data (no upstreams, peers, or customer-cone members) [Confirmed]

Analyst note

Encountered as a dormant legacy ASN registered to a U.S. Navy field activity (SUPSHIP San Diego); WHOIS resolves cleanly to ARIN org SUPSHI, but the ASN has never been announced in the global table. Clean, inactive government ASN. Allocated date taken from the autnum TOP-LEVEL registration event (1988-10-03), not the nested SUPSHI org-handle date (1988-08-18) nor a third-party scrape (1988-10-02).