asn.dev

Autonomous system

AS27066 DNIC-ASBLK-27032-27159

Unclassified ARIN

IPv4 addresses 35.84K 85 prefixes
IPv6 prefixes 8 counted as prefixes, not addresses
Countries 1 mostly US
Exchanges 0 recorded by PCH
Upstreams 1 30 downstream
Flagged prefixes 0 none

Summary

United States Department of Defense

United States of America · AI-generated

government military defense disa

DNIC-ASBLK-27032-27159 is held by the United States Department of Defense (DoD).

What it's used for

  • The address space carries military and defense infrastructure, evidenced by reverse DNS entries such as reverse.akamai.csd.disa.mil and usmc.mil, and netnames like SRFYOKONET2 and DISN-IP-UC-1-0.
  • With 35,584 IPv4 addresses announced across 84 prefixes and 33 observed neighbours, the ratio suggests a large internal corporate estate with significant internal segmentation rather than a transit provider.

Notable

  • Registrants include the DoD Network Information Center and the Navy Network Information Center (NNIC), aligning with the DoD holder.
  • The inventory is finely subdivided into numerous /22 and /23 blocks, consistent with site-by-site segmentation for a large federal agency.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.

Interconnection

Peering at a glance

Full topology · Graph

Internet exchanges

No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.

Transit providers

1 upstream, 30 downstream and 40 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS721United States Department of Defense (DoD)6,824

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-18, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 85 prefixes · 35.84K addresses IPv6 8 prefixes

CountryNamePrefixes
USUnited States of America93

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS27032
Registry name
DNIC-ASBLK-27032-27159
Registrant
United States Department of Defense (DoD)
Abuse contact
disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil
Registered
2003-01-16
Last changed
2025-09-12
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 118 with no ROA
ROAs
0 authorising AS27066
ASPA
no ASPA record
IRR
11% registered · 13 of 118 announcements
Route objects
72 naming AS27066

Reputation

Classification and threat

Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.

Spamhaus DROP

Not on ASN-DROP The network as a whole is not listed.

No DROP prefixes None of its announced space is on the DROP prefix list.

Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 442 networks and 1,784 prefixes, as published 2026-10-19. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.

FBI IC3

No IC3 indicators Nothing from the FBI IC3 feed.

IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.

Elsewhere

Cross-check