AS7773 SD-NET

Autonomous System 7773 (SD-NET) belongs to the **State Government of South

Dakota** — the state's own network, carrying traffic for state agencies rather

than for any commercial customer.

What it's used for

• Announcing 164.154.0.0/16, a legacy Class B registered to South Dakota in 1993 under the netname SD-NET, plus one additional /24.
• Serving the state's executive agencies and their public-facing services: government websites, licensing and revenue systems, and the internal connectivity between state offices across South Dakota. State networks of this shape typically also carry K-12 and public-institution traffic under the same umbrella.

Notable

• Reverse DNS across the range resolves under state.sd.us — for example state_hub1.state.sd.us — which is the clearest possible confirmation that the space is operated by the state itself and not delegated out.
• This is government address space. IPs here belong to state offices and state systems; they are not eyeball broadband and not hosting, so geolocating them to "South Dakota, government" is meaningful in a way that it would not be for a commercial ISP's pool.

Interesting

• A whole /16 for a state with under a million residents looks generous by modern standards, and it is: allocations in 1993 were made on request rather than on demonstrated need. Many US states hold similarly sized legacy blocks from the same period.