Autonomous system profile

Review registration details, announced prefixes, network relationships and historical snapshots.

AS121

Announcement observedARIN

DNIC-AS-00121 - United States Department of Defense (DoD) · DNIC-AS-00121

This profile is assembled from CHA.LA's normalized registration, routing and observation snapshots.

Last active10/16/2026, 00:00:00Snapshot expired

View network topology RDAP registration

ASN: AS121
Registration country: United States
Name: DNIC-AS-00121 - United States Department of Defense (DoD)
Abbreviation: DNIC-AS-00121
Registration date: 8/13/1987, 04:00:00
Status: Announcement observed
RIR: ARIN

Network relationships and announced prefixes

ASN / prefix	Description / organization	Geographic scope	First seen	Last active	IPv4	IPv6	Status
214.54.192.0/20BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/2/2026, 00:00:00	✓	×	Currently valid
214.54.208.0/20BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/2/2026, 00:00:00	✓	×	Currently valid
214.54.224.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/2/2026, 00:00:00	✓	×	Currently valid
214.54.226.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/2/2026, 00:00:00	✓	×	Currently valid
214.54.230.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/2/2026, 00:00:00	✓	×	Currently valid
214.54.231.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/2/2026, 00:00:00	✓	×	Currently valid

BGP prefixes have no geographic country; the column is marked not applicable.

Registration and sources

Organization: DNIC-AS-00121 - United States Department of Defense (DoD)
RIR: ARIN
Registration country: United States
Registration date: 8/13/1987, 04:00:00
Abuse contact: disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil

Snapshot trend

9/29/2026, 05:52:236 v40 v61 Upstream · 0 Uncertain

ASN route snapshotThis page reads collected ASN, prefix, relationship and history data. External interfaces are used for initial collection and scheduled refreshes.Source keys: cha-la-external-routing · rir-rdap-asn · iana-rdap-asn-bootstrap · cha-la-bgp-observations