AS101 University of Washington

WASH-NSF-AS - University of Washington · registered in the United States

IPv4 addresses4,0961 prefixes · <0.001% of announced IPv4

Rank in United States#4,484largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#14,998of 79,396 networks with IPv4

IPv61 x /32 (65,536 x /48)1 prefixes

CountryUnited States18,679 ASNs registered there

Open AS101 in ASN lookup Look up an IP in this network (209.124.176.1) All networks in United States

IPv4 prefixes

All 1 prefix, in address order.

209.124.176.0/20

IPv6 prefixes

All 1 prefix.

2001:1860::/32

Other ASNs named University of Washington

3 other networks use the same organisation name; together with AS101 they announce 245,248 IPv4 addresses.

ASNNameIPv4 addresses

AS73WASHINGTON-AS - University of Washington US238,080

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

AS64247UW-RESEARCH - University of Washington US1,024

Similar-sized networks in United States

ASNNameIPv4 addresses

AS26851#4481 PBCC - Palm Beach State College4,112

AS399203#4482 TREPIC-NETWORKS-01 - TREPIC Networks LLC4,096

AS14773#4483 LANLEB-IU13 - Lancaster Lebanon Intermediate Unit 134,096

AS6685#4485 GRAPEVINE - Grapevine Labs LLC4,096

AS10320#4486 ISPN - Internet Services Provider Network4,096

AS10973#4487 KALAMA - Scatter Creek InfoNet, Inc.4,096

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