AS11396 Williams Information Technology LLC

TWC-ASN - Williams Information Technology LLC · registered in the United States

IPv4 addresses24,83213 prefixes · <0.001% of announced IPv4

Rank in United States#1,929largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#5,463of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS11396 in ASN lookup Look up an IP in this network (151.142.0.1) All networks in United States

IPv4 prefixes

All 13 prefixes, in address order.

151.142.0.0/21
151.142.64.0/23
151.142.66.0/24
151.142.68.0/22
151.142.128.0/22
151.142.132.0/24
151.142.133.0/24
151.142.134.0/23
151.142.136.0/21
151.142.144.0/20
151.142.160.0/20
151.142.224.0/19
170.21.246.0/23

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AS40410#1932 USFRCS-BGP - FRIT24,832

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