AS11334 MIDAMERICAN

MIDAMERICAN is held by MidAmerican Energy Holdings Company, the Des Moines, Iowa utility group — an electricity and natural-gas utility now part of Berkshire Hathaway Energy. It is a corporate stub: RIS sees 10 IPv4 prefixes, 2,048 addresses, no IPv6, and 2 observed neighbours.

What it's used for

The utility group's own internet edge. Two /22s, 204.124.192.0/22 and 206.108.232.0/22, are announced both as covering blocks and as their component /24s — a deaggregation that is about steering traffic between two upstreams, not about scale. Every prefix that resolved is registered in ARIN to MidAmerican Energy Holdings Company under the handle MIDAM. Holder, registrant and announcer are the same company throughout.

Notable

The reverse DNS is what makes this concrete and also what shows the corporate structure. Sampled addresses answer to smtp5.midamerican.com and to moenergy.northernnaturalgas.com and qawww.northernnaturalgas.com. Northern Natural Gas is the interstate pipeline company that sat under the same Berkshire-owned holding structure, so a different domain appearing inside MidAmerican's space is sibling-company infrastructure, not a third party. This is the intra-group case, and reading it as a leased or resold block would be a mistake.

Interesting

The hostnames tell you what a utility actually exposes: a mail relay, a QA web server, an operations portal for a gas subsidiary. Everything else — SCADA, control systems, the corporate desktop estate — is behind private addressing and off the public table entirely, which is why an energy company serving millions of customers has a public footprint of two thousand addresses. Two observed BGP neighbours confirms the role: this network buys transit for redundancy and sells nothing. Nothing in this AS is consumer broadband, hosting, or carrier space.