Autonomous system
AS11052 IHC-NET - Intermountain Health Care, Inc.
Unclassified ARIN
Summary
Intermountain Health Care, Inc.
enterprise legacy
IHC-NET is Intermountain Health Care, Inc. — Intermountain Health, the large not-for-profit hospital system headquartered in Salt Lake City, Utah. It is an enterprise network: three prefixes totalling about 66,300 IPv4 addresses, no IPv6 in the observed routing, and only two BGP neighbours.
What it's used for
Almost all of the address space is a single legacy /16, 159.212.0.0/16, carrying the health system's own operations across its hospitals and clinics in Utah, Idaho and the surrounding states: clinical and electronic-health-record systems, imaging, laboratories, administrative sites and staff connectivity. None of it is sold as a service. The AS exists so a system that cannot tolerate renumbering or a single carrier failure can hold provider-independent addresses and multi-home them, which is why two upstream neighbours is all it needs.
Notable
The /16 and the /24 are registered to IHCNET, and the remaining /23 to the handle LMC-2 — which RDAP shows is registered to Intermountain Health Care itself, at its Salt Lake City address. That is worth spelling out, because an unfamiliar handle on one of an AS's prefixes is exactly the pattern that signals leased or brokered space elsewhere in this range. Here it is simply an old internal network name for one of the system's own facilities, and its 1994 registration date fits a legacy hospital block.
Interesting
Sixty-six thousand addresses behind just two neighbours is the shape of a large private enterprise, not a provider. Address count alone would put this network in the same bracket as a mid-sized ISP; the neighbour count immediately says otherwise, and it is the better signal of the two.
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 2026-11-04, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 3 prefixes · 66.30K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 3 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS11052- Registry name
- IHC-NET
- Registrant
- Intermountain Health Care, Inc.
- Abuse contact
- greg.reid@imail.org
- Registered
- 1998-03-23
- Last changed
- 2012-03-20
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 100% valid · 3 valid, 0 with no ROA
- ROAs
- 7 authorising AS11052
- ASPA
- no ASPA record
- IRR
- 100% registered · 3 of 3 announcements
- Route objects
- 12 naming AS11052
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: 453 networks and 1,853 prefixes, as published 2026-11-05. 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