Autonomous system profile

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

AS356

Announcement observedARIN

DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) · DNIC-ASBLK-00306-00371

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

Last active9/29/2026, 06:16:39Snapshot expired

View network topology RDAP registration

ASN: AS356
Registration country: United States
Name: DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD)
Abbreviation: DNIC-ASBLK-00306-00371
Registration date: 6/30/1989, 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
55.48.0.0/16BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.48.200.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.89.0.0/16BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.89.105.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.89.149.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.89.150.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.89.155.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.89.156.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.89.160.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.89.170.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.89.174.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.89.180.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.89.200.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.89.205.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.89.210.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.89.219.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.89.220.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.89.221.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.89.222.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.89.223.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.89.224.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.89.225.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.89.226.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.89.227.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.89.228.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.89.229.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.89.232.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.89.234.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.89.238.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.89.240.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.89.244.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.89.245.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.89.246.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.89.247.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.89.250.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.89.252.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.89.253.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.89.33.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.89.36.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.89.77.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.89.85.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.89.96.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid
55.89.99.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Currently valid

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

Registration and sources

Organization: DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD)
RIR: ARIN
Registration country: United States
Registration date: 6/30/1989, 04:00:00
Abuse contact: disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil

Snapshot trend

9/29/2026, 06:16:3943 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