AS21633 DOI-NBC-NET - U.S. Department of the Interior

🇺🇸

ARINassigned

Announced Prefixes (BGP)

5total

5 IPv40 IPv6

IPv4 Addresses

Allocated (RIR)0

Announced (BGP)4,864

IPv6 Addresses

Allocated (RIR)0

Announced (BGP)0

Prefix Limit (IPv4)

Prefix Limit (IPv6)

Country

RIR

Status

assigned

Allocated

2001-06-01

Announced Prefixes

(BGP)5

Prefix	RPKI	IRR	Last Seen
137.227.96.0/21MOAS	No ROA	-	2026-10-11
137.227.192.0/21	No ROA	-	2026-10-11
199.5.233.0/24MOAS	No ROA	-	2026-10-11
205.173.0.0/24	No ROA	-	2026-10-11
205.173.4.0/24	No ROA	-	2026-10-11

(seen in AS paths)

Networks AS21633 hands its own prefixes to: transit providers, or peers at an exchange.

Registry transfers of AS21633 between organisations.

Date	Resource	From	To	Type
2023-11-17	AS21633	National Business Center Department of theInterior 🇺🇸 US ARIN	U.S. Department of the Interior 🇺🇸 US ARIN	M&A

ASPA

No ASPA

External Links

What is an ASN?Autonomous systems, ASN ranges and how they are assigned
RPKI and route origin validationWhat the RPKI badges on the prefix list mean
ASPA explainedWhy AS21633 should publish an ASPA object
IPv4 transfers in the ARIN regionMonthly volume and the latest registry transfers
ASN data in AI agents and SIEMMCP server and API integrations

API

Returns ASN details, announced prefixes, and BGP routing data.

curl -s "https://api.ipctl.io/v1/asn/21633" | jq