Autonomous system
AS5766 IHS-MD-AS
Unclassified APNIC
Summary
Indian Health Service
government legacy
IHS-MD-AS is the Indian Health Service, the US federal agency within the Department of Health and Human Services that provides healthcare to American Indian and Alaska Native people. The MD in the handle refers to the agency's Maryland headquarters.
What it's used for
- The agency's own wide-area network, connecting IHS hospitals, health centres and clinics to headquarters systems and to the internet.
Notable
- A government healthcare network: the addresses belong to federal facilities and staff, not to consumers or hosting customers.
- ARIN registered this ASN to the IHS in 1995, so the low number is a genuine mid-90s federal allocation rather than a reissue.
Interesting
- IHS sites are spread across reservations and rural Alaska, some of the hardest-to-reach places in the United States, so this network's edge reaches further into low-connectivity territory than most enterprise WANs.
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.
Transit providers
1 upstream, 0 downstream and 2 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS19050 | U.S. Department of Health & Human Services | 592 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-20, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 13 prefixes · 66.05K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 14 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS5766- Registry name
- IHS-MD-AS
- Registrant
- Indian Health Service
- Abuse contact
- NOSC@IHS.GOV
- Registered
- 1995-10-12
- Last changed
- 2024-12-13
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 11 with no ROA
- ROAs
- 0 authorising AS5766
- ASPA
- no ASPA record
- IRR
- 0% registered · 0 of 11 announcements
- Route objects
- 0 naming AS5766
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 1,779 prefixes, as published 2026-10-21. 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