Autonomous system
AS5982 DNIC-ASBLK-05800-06055 - United States Department of Defense (DoD)
Unclassified ARIN
Summary
US Department of Defense — Joint Training Enterprise Network
government military legacy
A US Department of Defense network from the block DNIC-ASBLK-05800-06055, registered to the DoD Network Information Center (DNIC). Its address space is associated with the Joint Training Enterprise Network (JTEN) — reverse DNS in its range resolves under jten.mil.
What it's used for
- Networking for joint training. JTEN is the network underpinning the Joint National Training Capability, carrying live, virtual and constructive training exercises between combatant commands, services and training sites. The same domain fronts Joint Knowledge Online, the DoD's joint online-training portal.
- It announces
199.112.128.0/20from DNIC space — roughly 4,000 IPv4 addresses.
Notable
- A government / DoD network, not a commercial ISP or host.
- Training networks are a distinct slice of DoD networking: they must interconnect many organisations for an exercise and then stand back down, which is why they get their own AS rather than riding on an operational one.
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
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-13, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 4 prefixes · 4.10K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 4 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS5800- Registry name
- DNIC-ASBLK-05800-06055
- Registrant
- United States Department of Defense (DoD)
- Abuse contact
- disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil
- Registered
- 1995-10-24
- Last changed
- 2025-09-12
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 2 with no ROA
- ROAs
- 0 authorising AS5982
- ASPA
- no ASPA record
- IRR
- 0% registered · 0 of 2 announcements
- Route objects
- 0 naming AS5982
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: 455 networks and 1,849 prefixes, as published 2026-11-13. 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