AS407

AS407 is a legacy, low-numbered autonomous system registered under ARIN to Air Force Systems Networking, a U.S. Department of Defense / U.S. Air Force network entity. The ASN is not a distinct sub-registration but sits within a single ARIN block record, AFCONC-BLOCK1-AS, spanning AS379–AS508; the RDAP autnum for 407 resolves to that top-level block record, whose registrant org (ARIN handle 7ESG) is addressed at Gunther Annex, Maxwell AFB, Alabama, with administrative, technical, and abuse contact handled by DISA-Columbus in Whitehall, Ohio. The key triage point for AS407 is that it is effectively dark: RIPEstat reports announced=false, with zero IPv4 and zero IPv6 prefixes, and no RIS peer (0/323 v4, 0/321 v6) currently sees it. Hurricane Electric corroborates that the AS has been unrouted since 2022-09-23, and its single historical prefix (208.88.35.0/24) is flagged as a bogon route. Routing history shows a first announcement of 199.251.84.0/24 on 2001-09-26 and a last announcement of 208.88.35.0/24 on 2022-09-22. CAIDA ranks it 79,459 with a singleton customer cone (1 ASN, 0 prefixes, 0 addresses) and AS-degree zero across customer, peer, and provider — consistent with complete routing inactivity. RPKI posture is not assessable because there are no active originations and therefore no ROAs. No notable public abuse signal was found as of 2026-07-02 across AbuseIPDB, Spamhaus, Talos Intelligence, VirusTotal, and NANOG archives — an absence directly explained by the AS's own confirmed BGP inactivity rather than merely inferred.

Operator

Air Force Systems Networking (U.S. DoD / U.S. Air Force; ARIN org handle 7ESG) [Confirmed] — ARIN RDAP autnum/407, whois.arin.net/rest/org/7ESG

Country / RIR

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

Allocated

1989-08-04 (ARIN registry date from the autnum top-level registration event; NOT an IEEE date — IEEE publishes no ASN registration dates); last changed 2008-06-06 [Confirmed] — ARIN RDAP autnum top-level events

Org status

active in ARIN's registry (status: active) as part of the AFCONC-BLOCK1-AS block (AS379–AS508); registrant org Air Force Systems Networking (7ESG), Maxwell AFB, AL [Confirmed] — ARIN RDAP autnum/407

Contacts

abuse/admin/tech DISA-Columbus (REGIS10-ARIN), disa.columbus.ns.mbx.arin-registrations@mail.mil, +1-844-347-2457 ext2, 300 North James Road, Whitehall, OH 43213; registrant 501 East Moore Dr., Bldg 884, Rm 1100, Gunther Annex, Maxwell AFB, AL 36114

[Confirmed] — ARIN RDAP autnum/407, RIPEstat abuse-contact-finder

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-07-02 — not in AbuseIPDB, Spamhaus (SBL/DROP/XBL), Talos Intelligence, VirusTotal, or NANOG archives; dark ASN under a U.S. government operator

Network & routing

Network type

U.S. military/government enterprise network; AS407 is legacy/inactive (unrouted since 2022) [Likely] — solutions71.com/air-force-systems-networking-afsn, bgp.he.net/AS407

Size

dark — 0 IPv4 prefixes / 0 IPv4 addresses and 0 IPv6 prefixes; customer cone = 1 ASN (itself), 0 prefixes, 0 addresses [Confirmed] — RIPEstat routing-status / CAIDA AS Rank (2026-07)

Routing/peering

NOT announced — announced=false; 0 RIS peers seeing it (0/323 v4, 0/321 v6); CAIDA degree total 0 (customer 0, peer 0, provider 0); no upstreams or peers visible in any source [Confirmed] — RIPEstat as-overview / routing-status, CAIDA AS Rank

Peering policy

none published; PeeringDB org record for "Air Force Systems Networking" (org 20118) does not list AS407 among its ASNs [Confirmed] — peeringdb.com/org/20118

RPKI

not assessable — AS407 announces no prefixes, so there are no ROAs to validate (RIPEstat rpki-validation skipped, requires a prefix) [Unknown] — RIPEstat

Notable usage

unrouted in the global BGP table since 2022-09-23; historically originated 1 IPv4 prefix (208.88.35.0/24), flagged as a bogon route; first seen 199.251.84.0/24 on 2001-09-26, last seen 208.88.35.0/24 on 2022-09-22 [Likely for bogon flag via HE; Confirmed for routing dates via RIPEstat] — bgp.he.net/AS407, RIPEstat routing-status

Related ASNs

block AFCONC-BLOCK1-AS spans AS379–AS508 (U.S. Air Force network infrastructure) [Confirmed for block range via RDAP; Unknown for adjacent Air Force AS attributions] — ARIN RDAP autnum/407

Analyst note

Encountered as a dark legacy ASN registered to a U.S. DoD/Air Force entity within the AFCONC-BLOCK1-AS block. WHOIS/RDAP resolves to the block record; AS407 announces nothing and has been unrouted since 2022. Clean, inactive ASN; no dedicated operator website or peering policy of its own.