AS175

AS175 is a low-numbered, legacy Autonomous System Number registered under ARIN to Air Force Systems Networking (AFSN), a US Air Force / Department of Defense networking organization. The ARIN ASN name is PL-AS and the registrant org handle is 7ESG, with the registrant address listed at the Gunter Annex of Maxwell Air Force Base in Alabama; abuse and administrative contact runs through DISA-Columbus in Whitehall, Ohio, which manages ARIN registrations for many DoD networks. The ARIN autnum record shows a registration event of 1988-04-20, making AS175 one of the earliest ASNs ever assigned, though it was last refreshed at the autnum level in 2009. Operationally, AS175 is dormant: as of June 2026 it originates zero IPv4 and zero IPv6 prefixes, is seen by none of the roughly 327 IPv4 / 323 IPv6 RIS peers, and has zero observed BGP neighbours. RIPEstat routing history shows it first appeared in the global table with 130.53.0.0/16 on 2000-08-18 and was last seen announcing 129.238.0.0/16 on 2003-04-23, after which it effectively dropped off the public routing table. CAIDA ranks it at position 79,459 with all peering-degree metrics at zero. PeeringDB records an Open peering policy but no active exchange or facility connections. No notable public abuse signal was found for AS175 as of June 2026, which is consistent with a government/military operator profile.

Operator

Air Force Systems Networking (US Air Force / DoD; ARIN OrgId 7ESG, registrant address Maxwell AFB–Gunter Annex, AL) [Confirmed] — ARIN RDAP (https://rdap.arin.net/registry/autnum/175)

Country / RIR

US, ARIN [Confirmed] — ARIN RDAP; CAIDA country ISO US (https://rdap.arin.net/registry/autnum/175)

Allocated

ARIN autnum registration event 1988-04-20 (autnum last changed 2009-05-01); this is the ARIN registry record, not an IEEE attribution [Confirmed for the shown registry date] — https://rdap.arin.net/registry/autnum/175

Org status

active ARIN allocation; AFSN is an active US Air Force / DoD networking program (DISA-Columbus manages ARIN registrations) [Confirmed] — ARIN RDAP; PeeringDB

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-06-18; Scamalytics rates the AFSN ISP umbrella 0/100 fraud; no Spamhaus DROP/ASN-DROP, CleanTalk, AbuseIPDB, or NANOG abuse signal surfaced (single-pass null) [Confirmed clean Scamalytics; other feeds Likely-absent] — https://scamalytics.com/ip/isp/air-force-systems-networking

Network & routing

Network type

US federal government / military — US Air Force enterprise / DoD network infrastructure (legacy, low-numbered ASN) [Confirmed] — ARIN RDAP; https://solutions71.com/air-force-systems-networking-afsn/

Size

dormant — 0 IPv4 prefixes, 0 IPv6 prefixes, 0 announced addresses; CAIDA AS rank 79,459 [Confirmed] — bgp.he.net / bgp.tools (2026-06), CAIDA (https://bgp.he.net/AS175)

Routing/peering

not announced in the global table; 0 observed BGP neighbours, seen by 0 of ~327 IPv4 / ~323 IPv6 RIS peers; last seen 129.238.0.0/16 on 2003-04-23, first seen 130.53.0.0/16 on 2000-08-18 [Confirmed] — RIPEstat / bgp.he.net / bgp.tools

RPKI

not determinable per-ASN without an active prefix (validation skipped — no prefix supplied); HE shows 0 valid / 0 invalid RPKI originations, consistent with announcing no prefixes [Confirmed for the no-prefix state; per-prefix RPKI Unknown] — bgp.he.net

Customer cone

1 ASN, 0 prefixes, 0 addresses; CAIDA degree total/customer/peer/provider all 0; clique member false; IXP null [Confirmed] — CAIDA (canonical JSON)

Peering policy

Open per PeeringDB, but no active IX or facility connections recorded; ASN appears dormant in the routing table [Confirmed] — https://www.peeringdb.com/asn/175

Notable usage

one of the earliest ASNs assigned (ARIN registration 1988-04-20); AFSN supports US Air Force enterprise networking and holds a large portfolio of DoD ASNs [Confirmed registry date; portfolio scale Likely] — https://networksdb.io/ip-addresses-of/air-force-systems-networking/country/United+States

ARIN ASN name / org handle

PL-AS / 7ESG [Confirmed] — https://whois.arin.net/rest/asn/AS175

NOC / abuse contact

disa.columbus.ns.mbx.arin-registrations@mail.mil; +1-844-347-2457 ext2 [Confirmed] — ARIN RDAP

Related org affiliation

community sources tie AFSN to the 754th Electronic Systems Group (Hanscom AFB lineage); organizational only, not corroborated at the registry level [Likely] — https://bgp.he.net/AS385, https://www.hanscom.af.mil/

Analyst note

administratively active but operationally dormant since ~2003; no public website for AFSN (military program office). Clean, dormant legacy government ASN.