Autonomous system
AS11126 CARLE-ASN - Carle Clinic Association
Unclassified ARIN
Summary
Carle Clinic Association
enterprise legacy
CARLE-ASN is held by the Carle Clinic Association, the physician-group entity of the Carle healthcare system in Urbana, Illinois. The AS carries the network of a hospital and clinic organisation, not a service provider.
What it's used for
Healthcare enterprise. RIS observes 8 IPv4 prefixes totalling 1,792 addresses and no IPv6, built from a /22 (199.184.120.0/22), a /23 (192.112.82.0/23) and 192.104.139.0/24, with the rest of the prefix count being more-specific /24s announced out of those same blocks. Two observed BGP neighbours puts it firmly in enterprise territory: a dual-homed institutional edge.
The reverse DNS says what the space carries. users.carle.com and legacy.carle.com are the health system's own; mhc.healthalliance.org belongs to the Health Alliance health-plan business long associated with Carle. Clinical, administrative and insurance systems for one organisation.
Notable
The registrant column contains a genuine surprise. Four of the announced blocks sit under CARLENET — Carle's own ARIN object — but 192.112.82.0/23, 192.112.83.0/24 and 192.104.139.0/24 are registered to ABMC-EXT1, ABMC-INT2 and ABMC-INT1, whose organisation is Advocate BroMenn Medical Center of Normal, Illinois: a different central-Illinois hospital.
So Carle's AS announces address space still registered to another health system roughly fifty miles away. This is not the IP-leasing shape — both parties are real, findable, physically-located hospitals, and the space carries first-party healthcare rDNS rather than nothing. It reads instead as the residue of a long-standing regional arrangement between two Illinois providers, with the registry never updated to follow operational reality.
The tell that Carle really does run this space: 192.104.139.5, inside an ABMC-registered block, answers to legacy.carle.com. Registration says one hospital; the reverse DNS, and the routing, say the other.
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 1 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS5742 | Fidium | 472 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-01, 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 · 1.79K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 3 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS11126- Registry name
- CARLE-ASN
- Registrant
- Carle Clinic Association
- Abuse contact
- Doug.Buttry@carle.com
- Registered
- 1998-04-17
- Last changed
- 2019-01-25
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 8 with no ROA
- ROAs
- 0 authorising AS11126
- ASPA
- no ASPA record
- IRR
- 100% registered · 8 of 8 announcements
- Route objects
- 10 naming AS11126
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: 447 networks and 1,843 prefixes, as published 2026-11-02. 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