AS19739 County of San Bernardino

COUNTY-SANBERNARDINO - County of San Bernardino · registered in the United States

IPv4 addresses10,49621 prefixes · <0.001% of announced IPv4

Rank in United States#2,882largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#8,841of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS19739 in ASN lookup Look up an IP in this network (170.164.0.1) All networks in United States

IPv4 prefixes

All 21 prefixes, in address order.

170.164.0.0/24
170.164.10.0/23
170.164.14.0/24
170.164.20.0/23
170.164.40.0/22
170.164.44.0/23
170.164.50.0/24
170.164.60.0/24
170.164.70.0/23
170.164.75.0/24
170.164.84.0/23
170.164.87.0/24
170.164.97.0/24
170.164.101.0/24
170.164.107.0/24
170.164.116.0/22
170.164.124.0/23
170.164.165.0/24
170.164.239.0/24
170.164.240.0/21
170.164.248.0/23

Other ASNs named County of San Bernardino

1 other network uses the same organisation name; together with AS19739 they announce 11,520 IPv4 addresses.

ASNNameIPv4 addresses

AS398665CSBSO - COUNTY OF SAN BERNARDINO US1,024

Similar-sized networks in United States

ASNNameIPv4 addresses

AS10991#2879 CAPGE-HOSTING-MRO - CAPGEMINI AMERICA, INC.10,496

AS18794#2880 RAMAPO-COLLEGE - Ramapo College of New Jersey10,496

AS19084#2881 COLOUP - ColoUp10,496

AS22200#2883 BLOOMINGDALE-COMMUNICATIONS - Bloomingdale Communications Inc.10,496

AS22775#2884 MOORECAP - Moore Capital Management10,496

AS26857#2885 TRUSTCOMM-AS - TrustComm, Inc.10,496

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