AS742

AS742 is a dormant, unrouted autonomous system number registered to Air Force Systems Networking, a U.S. Air Force/Department of Defense entity, that currently announces zero IPv4 and zero IPv6 prefixes in the global routing table. It is not an independent commercial network but a single number inside a larger federal block registration.

The ASN sits within ARIN's contiguous block AS727–AS746 ("AFCONC-BLOCK2-AS"), registered as a unit to Air Force Systems Networking (ARIN internal admin code 7ESG) at Maxwell AFB, Alabama, with registration and abuse-contact functions delegated to DISA-Columbus in Whitehall, Ohio. No individual operator website, About page, or peering-policy page exists for AS742 specifically — consistent with an internal DoD numbering resource rather than a public-facing operator.

Routing data from RIPEstat, CAIDA AS Rank, bgp.he.net, and bgp.tools agree unanimously: AS742 has 0 announced IPv4/IPv6 prefixes, 0 upstreams, 0 peers, and a CAIDA AS rank of 79,459 with a singleton customer cone (itself, 0 prefixes, 0 addresses). No PeeringDB network record exists for AS742 (a direct API query returned 404). Because nothing is announced, RPKI validation does not apply — there are no ROAs to check.

The ARIN RDAP record for the containing AS727–AS746 block carries only a top-level "last changed" event (2008-06-06) — there is no top-level registration event on this record. The 2008-06-05 timestamp sometimes read as an allocation date actually belongs to the nested registrant entity (7ESG, Air Force Systems Networking), not the autnum object itself; a separate point-of-contact entity (REGIS10-ARIN) carries its own 2009-06-24 registration date. Neither entity-level timestamp is the ASN's allocation date, so allocated_date is recorded here as Unknown. Separately, ipinfo.io displays a "1970-01-01" allocation date for AS742 — a Unix-epoch placeholder artifact, not a real event, and is not used here.

Operator

Air Force Systems Networking (U.S. Air Force / DoD entity; ARIN admin code 7ESG; Maxwell AFB, AL; registration/abuse contact desk via DISA-Columbus, Whitehall, OH) [Confirmed] — ARIN RDAP autnum record (rdap.arin.net/registry/autnum/742)

Country / RIR

US, ARIN [Confirmed] — ARIN RDAP

Allocated

Unknown — the AS727–AS746 block's top-level RDAP events[] carries only a "last changed" event (2008-06-06); no top-level registration event exists on this record. The 2008-06-05 date belongs to the nested registrant entity (7ESG), not the autnum, and is not the allocation date

[Confirmed absence] — rdap.arin.net/registry/autnum/742

Org status

active per ARIN RDAP status field for the AS727–AS746 registration covering AS742 [Confirmed] — rdap.arin.net/registry/autnum/742

Contacts

abuse/registration handled by DISA-Columbus (disa.columbus.ns.mbx.arin-registrations@mail.mil); registrant address Maxwell AFB, AL [Confirmed] — RIPEstat abuse-contact-finder for resource 742, ARIN RDAP

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-07-27 — not in a Spamhaus ASN-DROP spot-check (list fetch truncated), AbuseIPDB, or general threat-intel searches; no NANOG/seclists.org archive threads found

Network & routing

Network type

U.S. Air Force / DoD internal numbering resource within block AS727–AS746 ("AFCONC-BLOCK2-AS"); currently unrouted/dormant, not a commercial transit or access network [Confirmed] — ARIN RDAP, bgp.tools/as/742

Size

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

Routing/peering

NOT announced — 0 RIS peers seeing it (0/329 v4, 0/324 v6); CAIDA degree total 0 (customer 0, peer 0, provider 0); no PeeringDB record (404 on api/net?asn=742); no public peering policy found [Confirmed]

RPKI

not assessable — AS742 announces no prefixes, so there are no ROAs to validate [Confirmed] — RIPEstat rpki-validation for resource 742

Notable usage

single number within the AS727–AS746 block allocated as a unit to Air Force Systems Networking; no individually associated prefixes, peers, or upstreams currently in public routing data, consistent with an unused or reserved sub-allocation within the larger Air Force block

[Confirmed] — rdap.arin.net/registry/autnum/742, bgp.tools/as/742

Related ASNs

AS727–AS746 (the containing ARIN block registration, "AFCONC-BLOCK2-AS") [Confirmed] — rdap.arin.net/registry/autnum/742

Analyst note

Encountered as a dormant, unrouted ASN inside a U.S. Air Force/DoD block registration (AS727–AS746). No independent operator web presence, PeeringDB record, or routing activity exists for AS742 specifically; all four routing sources agree on zero announcements and zero peers. Allocated_date is recorded as Unknown: the block's top-level RDAP events[] carries only a last-changed event (2008-06-06), and the 2008-06-05 date some research angles cited is a nested entity-level registration timestamp (7ESG), not the autnum's own registration event — two angles reading that same entity date is not independent corroboration of an allocation fact.