AS745

AS745 is an active autonomous system operated by the U.S. Air Force (registrant name "Air Force Systems Networking," ARIN org handle 7ESG) that is currently announcing routes rather than sitting dormant: bgp.tools and bgp.he.net both report roughly 79 IPv4 prefixes covering an estimated ~33,500 addresses, with zero IPv6 announced.

AS745 has no individually-delegated ARIN autnum record of its own. ARIN RDAP returns it as part of a consolidated range object, handle AS727, spanning startAutnum 727 through endAutnum 746 and named AFCONC-BLOCK2-AS — every WHOIS/RDAP field below (registrant, address, contacts) is that block-level record, the only one ARIN exposes for AS745. Registrant address is 501 East Moore Dr., Bldg 884 Rm 1100, Gunther Annex, Maxwell AFB, AL 36114; ARIN registration matters are administratively handled by DISA-Columbus, not the Air Force directly.

Observed routing shows a single upstream, AS27064 (DoD Network Information Center), and a peer set of other DoD-affiliated ASNs (AS27079, AS27080, AS27086, AS27087, AS6039–AS6042), for a total AS degree of 9 (1 provider + 8 peers, 0 customers). CAIDA's customer cone for AS745 is a singleton — 1 ASN (itself), 79 prefixes, 33,536 addresses — since none of its peering relationships are downstream customers; CAIDA AS Rank places it at 15,008. No PeeringDB net record exists for AS745 (a direct API query returned an empty result), so there is no operator-published peering policy or IX presence to cite; both are recorded as Unknown rather than assumed absent.

The RDAP autnum object's top-level events array carries only a "last changed" event (2008-06-06) — no "registration" eventAction is present at that level. Entity-level registration dates exist on the org (7ESG) and abuse-contact (REGIS10-ARIN) records, but those are decoys for the ASN's own allocation history, not the autnum's top-level registration event, so allocated_date is recorded here as Unknown rather than borrowed from an entity timestamp.

Operator

Air Force Systems Networking (U.S. Air Force) — ARIN org handle 7ESG [Confirmed] — ARIN RDAP autnum/745

Country / RIR

US, ARIN [Confirmed] — ARIN RDAP autnum/745

Allocated

Unknown — the autnum's top-level RDAP events[] carries only a "last changed" event (2008-06-06); no top-level "registration" eventAction is present. Entity-level dates on the org/abuse contacts (e.g. 2008-06-05, 2009-06-24, 2025-03-13) are administrative timestamps, not the ASN's allocation date, and are excluded per the no-decoy-dates rule

[Unknown] — ARIN RDAP autnum/745

Block context

AS745 has no individual ARIN autnum record; it falls within consolidated block AS727 (startAutnum 727, endAutnum 746, name AFCONC-BLOCK2-AS), status active [Confirmed] — ARIN RDAP autnum/745

Org status

active government/military network, part of U.S. Air Force infrastructure; ARIN registration administratively handled by DISA (Defense Information Systems Agency), Columbus, OH office [Confirmed] — ARIN RDAP autnum/745

Contacts

disa.columbus.ns.mbx.arin-registrations@mail.mil (group "Registration," handle REGIS10-ARIN, DISA-Columbus, 300 North James Road, Whitehall, OH 43213; phone +1-844-347-2457 ext2) [Confirmed] — ARIN RDAP autnum/745

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-07-27 — not in Spamhaus ASN-DROP or NANOG archives; AbuseIPDB unverifiable (404 on guessed URL). Hurricane Electric flags "AS745 announces bogons" — a routing-hygiene issue, not a malicious-abuse finding [Confirmed for the bogon flag and ASN-DROP absence; Unknown for AbuseIPDB] — spamhaus.org/drop/asndrop.json, bgp.he.net/AS745

Network & routing

Network type

Government / U.S. military — Department of the Air Force network infrastructure; ARIN registration handled by DISA-Columbus on behalf of DoD [Confirmed] — ARIN RDAP autnum/745

Size

~79 IPv4 prefixes announced (~33,536 addresses estimated); 0 IPv6 prefixes — two independent aggregators (ipapi.is and bgp.tools/bgp.he.net) agree on the 79-prefix count [Likely] — bgp.tools/as/745, bgp.he.net/AS745, ipapi.is/asn/745.html

Routing/peering

single upstream AS27064 (DoD Network Information Center); peers sample AS27079, AS27080, AS27086, AS27087, AS6039–AS6042 (all DoD-affiliated); AS degree 9 total (1 provider + 8 peers, 0 customers). CAIDA AS rank 15,008 (seen, clique member); customer cone is a singleton — 1 ASN, 79 prefixes, 33,536 addresses — distinct from the 9-ASN peering degree. No PeeringDB net record exists for AS745 (API query returned empty), so peering policy and IX presence are Unknown rather than none-confirmed [Confirmed for rank/degree/cone; Unknown for policy/IX] — bgp.tools/as/745, bgp.he.net/AS745, peeringdb.com/api/net?asn=745, api.asrank.caida.org/v2/restful/asns/745

RPKI

not assessable from sources checked — bgp.tools shows no ROA data (neither valid nor invalid); RIPEstat payload consulted did not include RPKI validation for this pass [Unknown] — bgp.tools/as/745, bgp.he.net/AS745

Notable usage

Third-party aggregator ipapi.is lists example prefixes including 6.64.121.0/24, 130.16.241.0/24, and ranges within 134.152.x.x and 140.185.x.x associated with this block; not independently cross-verified against ARIN's own prefix listings in this pass [Likely] — ipapi.is/asn/745.html

Related ASNs

AS727–AS746 (the shared consolidated block, AFCONC-BLOCK2-AS); AS27064 (observed sole upstream) [Confirmed for the block; Likely for the AS27064 relationship] — ARIN RDAP autnum/745, bgp.tools/as/745

Analyst note

AS745 is DoD/Air Force address space with no ASN-specific RDAP record — every registry fact above is inherited from the shared AS727–AS746 block object. It is actively announced (unlike a dormant legacy ASN), the only concrete security signal is HE.net's bogon-announcement flag, and allocated_date is correctly left Unknown because the autnum's own top-level events genuinely carry no registration date, only a last-changed timestamp.