The IP API The IP API
// ASN

AS121

DNIC-AS-00121 - United States Department of Defense DoD, US

Detailed information about the Autonomous System. Need another one? Look up a different ASN.

ASN
AS121
Organization
United States Department of Defense (DoD)
Description
DNIC-AS-00121 - United States Department of Defense DoD, US
Country
US
State / Region
OH
City
Columbus
Address
3990 E. Broad Street
Registry (RIR)
ARIN
Created
2007-04-04
Updated
2025-03-13
IPv4 Prefixes
5
IPv6 Prefixes
0

IPv4 Prefixes

5 total
214.54.192.0/20
214.54.208.0/20
214.54.224.0/23
214.54.226.0/23
214.54.230.0/24

What is AS121?

AS121 is an Autonomous System Number (ASN) assigned to United States Department of Defense (DoD). An ASN identifies a network or group of IP prefixes operated under a common routing policy in the BGP protocol.

Looking for more ASN data?

Use our ASN Lookup Tool for real-time WHOIS queries, or explore our API documentation to integrate ASN data into your applications.