AS13968 CALIFORNIA ISO

CAISO-NET-BLK - CALIFORNIA ISO · registered in the United States

IPv4 addresses2,5606 prefixes · <0.001% of announced IPv4

Rank in United States#5,625largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#19,995of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS13968 in ASN lookup Look up an IP in this network (12.200.57.1) All networks in United States

IPv4 prefixes

All 6 prefixes, in address order.

12.200.57.0/24
12.200.60.0/24
12.231.58.0/24
45.42.16.0/23
45.42.19.0/24
45.42.20.0/22

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ASNNameIPv4 addresses

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AS14283#5627 BLUEONE - blueone.net2,560

AS14397#5628 AS-DNS - 1st Class Hosting, LLC2,560

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