AS11974 DOS-GPADN-01

DOS-GPADN-01 belongs to the US Department of State. ARIN registers the ASN

to the department at 2201 C Street NW, Washington DC — the Harry S. Truman

Building, State's headquarters — so the government-sounding handle checks out

against the address rather than merely sounding official.

What it's used for

• Federal government networking. The AS announces a single /24 (256 addresses), 12.195.166.0/24, which RDAP shows registered to the Department of State. The block sits inside AT&T's legacy 12/8, i.e. it is provider-assigned space reassigned to the department rather than address space State holds directly.
• With one prefix and two observed neighbours, this is a small, purpose-built attachment — a specific departmental service or site given its own AS number for multihoming — not the department's general enterprise network, which is far larger than 256 addresses.

Notable

• The GPADN element of the handle is an internal department code. There is no public expansion of it that can be confirmed, so it is left alone here rather than guessed at; ARIN handles frequently encode program or site names that mean nothing outside the owning organization.

Interesting

• ARIN registered this ASN to State in 2022. The low number is recycled space, not evidence of an early-internet allocation, and the current holder is the whole story.