AS36161 County of Westchester

WESTCHESTERCOUNTY-NY - County of Westchester · registered in the United States

IPv4 addresses65,5366 prefixes · 0.002% of announced IPv4

Rank in United States#1,248largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#3,333of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS36161 in ASN lookup Look up an IP in this network (163.151.0.1) All networks in United States

IPv4 prefixes

All 6 prefixes, in address order.

163.151.0.0/21
163.151.8.0/21
163.151.16.0/20
163.151.32.0/19
163.151.64.0/18
163.151.128.0/17

Similar-sized networks in United States

ASNNameIPv4 addresses

AS33608#1245 HOOD-COLLEGE - Hood College65,536

AS33670#1246 NOVASOUTHEASTERNAS - Nova University65,536

AS36091#1247 SCAQMD-ASN - South Coast Air Quality Management District65,536

AS36269#1249 UOFSCRANTON - University of Scranton65,536

AS36390#1250 TRI-C-AS - Cuyahoga Community College65,536

AS36427#1251 VASSAR-ASN1 - Vassar College65,536

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