AS73 University of Washington

WASHINGTON-AS - University of Washington · registered in the United States

IPv4 addresses238,08012 prefixes · 0.008% of announced IPv4

Rank in United States#281largest network in US by IPv4 space, of 18,338 · 0.02% of US

Rank worldwide#955of 79,396 networks with IPv4

IPv665,280 x /488 prefixes

CountryUnited States18,679 ASNs registered there

Open AS73 in ASN lookup Look up an IP in this network (69.91.192.1) All networks in United States

IPv4 prefixes

All 12 prefixes, in address order.

69.91.192.0/18
108.179.140.0/22
128.95.0.0/16
128.208.0.0/16
140.142.0.0/16
173.250.160.0/19
192.26.136.0/24
192.42.144.0/24
198.48.64.0/20
198.48.80.0/21
198.48.88.0/22
205.175.96.0/19

IPv6 prefixes

All 8 prefixes.

2607:4000::/39
2607:4000:200::/40
2607:4000:400::/38
2607:4000:800::/37
2607:4000:1000::/36
2607:4000:2000::/35
2607:4000:4000::/34
2607:4000:8000::/33

Other ASNs named University of Washington

3 other networks use the same organisation name; together with AS73 they announce 245,248 IPv4 addresses.

ASNNameIPv4 addresses

AS101WASH-NSF-AS - University of Washington US4,096

AS14221UW-GR-AS - University of Washington US2,048

AS64247UW-RESEARCH - University of Washington US1,024

Similar-sized networks in United States

ASNNameIPv4 addresses

AS10455#278 LUCENT-CIO - Nokia of America Corporation241,152

AS35847#279 AS-EFTL - Ezee Fiber240,384

AS16504#280 GRANITE - Granite Telecommunications LLC239,360

AS396356#282 LATITUDE-SH - Latitude.sh237,312

AS23473#283 PAVLOVMEDIA - PAVLOV MEDIA INC235,520

AS17#284 PURDUE - Purdue University233,458

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources