Autonomous system profile

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

AS4221

Announcement observedARIN

DNIC-ASBLK-04214-04221 - United States Department of Defense (DoD) · DNIC-ASBLK-04214-04221

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

Last active9/29/2026, 11:21:29Snapshot expired

View network topology RDAP registration

ASN: AS4221
Registration country: United States
Name: DNIC-ASBLK-04214-04221 - United States Department of Defense (DoD)
Abbreviation: DNIC-ASBLK-04214-04221
Registration date: 1/9/1995, 05:00:00
Status: Announcement observed
RIR: ARIN

Network relationships and announced prefixes

ASN / prefix	Description / organization	Geographic scope	First seen	Last active	IPv4	IPv6	Status
2001:480:52::/48BGP · IPv6	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 08:00:00	10/3/2026, 16:00:00	×	✓	Currently valid
2001:480:95::/48BGP · IPv6	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 08:00:00	10/3/2026, 16:00:00	×	✓	Currently valid

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

Registration and sources

Organization: DNIC-ASBLK-04214-04221 - United States Department of Defense (DoD)
RIR: ARIN
Registration country: United States
Registration date: 1/9/1995, 05:00:00
Abuse contact: disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil

Snapshot trend

9/29/2026, 11:21:290 v42 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