AS73

AS73 is a legacy allocation registered under ARIN to the University of Washington (org UWND-Z, Seattle, WA), and the ARIN comment describes it as the primary AS for the University of Washington campuses in the Puget Sound area. RFC 1020/1166 list it as "WASHINGTON-AS / University of Washington," an unbroken academic allocation with the same holder then and now. It is a stable, actively-routed research-and-education network serving UW campus infrastructure. UW also holds AS14221 (UW-GR-AS), a disaster-recovery site explicitly noted as not dependent on AS73. The ARIN ASN RegDate is 1986-05-05 (the UWND-Z org RegDate of 2020-05-20 is a registry refresh). For triage this is a clean academic network tied to UW. No notable public abuse signal was found as of June 2026.

Operator

University of Washington (ARIN OrgId UWND-Z, Seattle, WA) [Confirmed] — ARIN RDAP

Country / RIR

US, ARIN [Confirmed]

Allocated

ARIN ASN RegDate 1986-05-05 (org UWND-Z RegDate 2020-05-20 is a registry refresh) [Confirmed]

Org status

active — washington.edu

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-06-08; clean academic network — bgp.tools

Network & routing

Network type

research / education [Confirmed]

Size

actively announcing; primary AS for UW Puget Sound campuses; exact prefix counts not captured — bgp.tools (2026-06)

Routing/peering

active; RPKI unknown — bgp.tools

Notable usage

ARIN comment "primary AS for the University of Washington campuses in the Puget Sound area." RFC 1020/1166 "WASHINGTON-AS" — same holder — washington.edu

Related ASNs

AS14221 (UW-GR-AS — UW disaster-recovery site, not dependent on AS73) [Confirmed]

Analyst note

A stable R&E network tied to UW campus infrastructure; actively routed.