Autonomous system
AS12099 OAKWOOD-HEALTHCARE - OAKWOOD HEALTHCARE INC
Unclassified ARIN
Summary
Oakwood Healthcare
enterprise healthcare legacy
A hospital network in the Detroit metro area, originally Oakwood Healthcare of Dearborn and since merged into a much larger Michigan health system.
What it's used for
- Internal networking for hospitals and clinics: clinical systems, imaging, administration and the corporate estate behind them.
Notable
- Eight of the nine announced prefixes are registered not to Oakwood but to William Beaumont Hospital, under the netname
WMBEAUNET. Oakwood and Beaumont combined in 2014 to form Beaumont Health, which in turn merged with Spectrum Health in 2022 to become Corewell Health, so the AS handle, the netnames and the operating company are three different generations of the same organisation. - 66,000 addresses over nine prefixes with only two observed BGP neighbours. Hospital networks are end sites by design — large internal estates with a very small external surface.
- No IPv6 announced.
Interesting
- US healthcare consolidation is legible in address registries long before it is anywhere else. Nobody renumbers a hospital to match a merger, so the paperwork accumulates a layer for each deal while the network underneath keeps running.
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 9 prefixes · 66.30K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 9 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS12099- Registry name
- OAKWOOD-HEALTHCARE
- Registrant
- OAKWOOD HEALTHCARE INC
- Abuse contact
- david.torode@corewellhealth.org
- Registered
- 2008-03-11
- Last changed
- 2025-07-31
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 100% valid · 7 valid, 0 with no ROA
- ROAs
- 3 authorising AS12099
- ASPA
- no ASPA record
- IRR
- 100% registered · 7 of 7 announcements
- Route objects
- 16 naming AS12099
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