AS13968 — CAISO-NET-BLK

AS13968 announces 6 IPv4 prefixes covering 2,560 addresses and 0 IPv6 prefixes.

About this network

The organisation that balances a state's electricity grid, announcing six small blocks behind one upstream.

What it's used for

• A grid operator's network. 2,048 addresses across six IPv4 prefixes, one observed BGP neighbour, and no IPv6 announced.

Notable

• Three blocks are netname CALIFO-22, registered to CALIFORNIA ISO.
• Three more are ATT-NET-12-200-57-0, ATT-NET-12-200-60-0 and ATT-NET-12-231-58-0, also registered to the operator.
• The blocks split between an older carrier range and a range only recently in circulation.
• Eighteen addresses were queried for reverse DNS and none returned a name.

Interesting

• An independent system operator matches electricity supply to demand across a whole state, second by second. Its network is one of the least public and most consequential on this list, and from the outside it looks like any other company with a couple of thousand addresses.
• One upstream is the detail worth pausing on. Control systems of this kind do not run over the public internet, so what is announced here is the small outward-facing edge and the real resilience lives on circuits that never appear in a routing table.
• The netname truncates the organisation to six characters and appends a counter, which is the registry's old fixed-width habit surviving into records that had no need of it.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 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

Upstream networks

• AS55002 F5, Inc.

Adjacent networks

• AS55002 F5, Inc.