AS448

AS448 is a legacy autonomous system number registered under ARIN to Air Force Systems Networking, a U.S. Department of Defense (Air Force) network entity administered through the Defense Information Systems Agency (DISA). It does not appear in ARIN's registry as an individually named record: an RDAP query for autnum 448 correctly resolves to a flat block record (handle AS379, name AFCONC-BLOCK1-AS, spanning AS379 through AS508) that was bulk-registered to the Air Force on 1989-08-04. Under RDAP's flat-block modeling for this legacy range, that top-level registration event is the first-party ARIN allocation fact for AS448 — not a decoy from a sibling ASN. The key triage point is that AS448 is effectively dormant: RIPEstat, CAIDA AS Rank, and third-party route collectors all agree it announces zero IPv4 and zero IPv6 prefixes today, has zero visible BGP peers, zero upstreams, zero customers, and no IXP presence. Its CAIDA AS rank of 79,459 sits near the bottom of the global ranking and its customer cone is a singleton. RIPEstat's routing history records a single brief origination — 199.251.38.0/24, first seen 2001-09-26 and last seen 2001-10-23 (~4 weeks) — with nothing announced since. RPKI posture is not assessable because there are no active originations and therefore no ROAs. The registrant org (ARIN handle 7ESG) lists Maxwell AFB, Alabama, with abuse/administrative/technical contacts routed through DISA-Columbus, Ohio. No notable public abuse signal was found as of 2026-07-02 — not in Spamhaus, AbuseIPDB, CleanTalk, or NANOG archives — consistent with a clean, dormant military allocation.

Operator

Air Force Systems Networking (U.S. Air Force / DoD; ARIN registrant handle 7ESG; block record AFCONC-BLOCK1-AS, handle AS379) [Confirmed] — https://rdap.arin.net/registry/autnum/448, https://rdap.arin.net/registry/entity/7ESG

Country / RIR

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

Allocated

1989-08-04 (ARIN RDAP autnum TOP-LEVEL registration event for the AS379–AS508 block that AS448 falls under; a first-party RIR fact, NOT an IEEE date — IEEE publishes no ASN dates); last changed 2008-06-06 [Confirmed] — https://rdap.arin.net/registry/autnum/448

Org status

RIR record Active (ARIN RDAP); registrant org 7ESG last changed 2025-03-13, indicating the registration is currently maintained even though AS448 announces no routes [Confirmed] — https://rdap.arin.net/registry/autnum/448, https://rdap.arin.net/registry/entity/7ESG

Contacts

disa.columbus.ns.mbx.arin-registrations@mail.mil; +1-844-347-2457 ext2; registrant Maxwell AFB, 501 East Moore Dr, Bldg 884 Rm 1100 Gunter Annex, AL 36114; abuse/admin/tech via DISA-Columbus, 300 North James Road, Whitehall, OH 43213 [Confirmed] — https://rdap.arin.net/registry/autnum/448

IANA reference

none (blank) — no per-ASN IANA RFC reference applies; the IANA 16-bit AS block 1–1876 is Assigned by ARIN [Unknown for a specific reference] — RIPEstat as-overview (block "IANA 16-bit Autonomous System (AS) Numbers Registry")

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-07-02 — not in Spamhaus, AbuseIPDB, CleanTalk ASN statistics, or NANOG archives; Scamalytics lists a 0/100 fraud-risk score; consistent with a dormant military allocation [Confirmed] — https://www.spamhaus.org/blocklists/spamhaus-blocklist/, https://www.abuseipdb.com/, https://scamalytics.com/ip/isp/air-force-systems-networking

Network & routing

Network type

U.S. government / military network (United States Air Force / DISA); AS448 is legacy and currently dormant [Likely] — https://ipinfo.io/AS448, https://www.peeringdb.com/org/20118

Size

dormant — 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 (resource 448)

Routing/peering

NOT announced — 0 RIS peers seeing it (0/325 v4, 0/321 v6); CAIDA degree total 0 (customer 0, peer 0, provider 0); no upstreams or peers visible [Confirmed]. No public peering policy — PeeringDB org 20118 has no peering-policy field populated (last updated 2018-06-02)

[Confirmed] — RIPEstat routing-status, https://www.peeringdb.com/org/20118

RPKI

not assessable — AS448 announces no prefixes, so there are no ROAs to validate (RIPEstat rpki-validation requires a covered prefix; none available) [Unknown]

Notable usage

historically originated a single prefix, 199.251.38.0/24, for ~4 weeks in 2001 (first seen 2001-09-26, last seen 2001-10-23); nothing announced since. Sits inside a legacy DoD block (AS379–AS508) bulk-registered to the Air Force in 1989 [Confirmed] — RIPEstat routing-status (resource 448)

Related ASNs

block record AFCONC-BLOCK1-AS covers AS379–AS508; PeeringDB org 20118 associates several other DoD ASNs (e.g. AS65, AS123, AS175, AS221, AS301) but does not list AS448 among them [Likely] — https://www.peeringdb.com/org/20118

Analyst note

RDAP for autnum 448 returns a flat block record (handle AS379, startAutnum 379, endAutnum 508); the top-level registration date 1989-08-04 is the correct first-party ARIN allocation date for AS448 under flat-block modeling. Nested entity dates (org 7ESG registration 2008-06-05 / last changed 2025-03-13; POC REGIS10-ARIN registration 2009-06-24) are org/contact record dates and were excluded as decoys. Clean, dormant DoD ASN.