Autonomous system
AS12228 2CO - GENESISCARE USA OF FLORIDA, LLC
Unclassified ARIN
Summary
GenesisCare USA of Florida
healthcare enterprise legacy
The network of a cancer treatment provider operating clinics across Florida.
What it's used for
- Clinical and corporate networking from two adjacent blocks,
104.251.16.0/21and104.251.24.0/22, 3,072 addresses in total.
Notable
- Both blocks share the netname
21C-PUB-NET, registered to GenesisCare USA of Florida, LLC. - One observed BGP neighbour, and no IPv6 announced.
Interesting
- Three generations of the same company are visible in three different fields. The AS handle is
2CO, the netname is21C-PUB-NET, and the registrant is GenesisCare. 21st Century Oncology was a large Florida-based radiation oncology chain that was acquired by GenesisCare, and the routing artefacts were never renamed — an AS handle and a netname are both effectively permanent once they exist, because changing them means touching working configuration for no operational gain. - A radiation oncology network is a reminder that the interesting traffic on a healthcare AS is not web browsing. Treatment planning systems move imaging studies between clinics, and the machines that deliver the dose are calibrated against plans computed elsewhere.
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 |
|---|---|---|
| AS23314 | Summit Broadband | 120 |
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 2 prefixes · 3.07K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 2 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS12228- Registry name
- 2CO
- Registrant
- GENESISCARE USA OF FLORIDA, LLC
- Abuse contact
- howard.perry@usa.genesiscare.com
- Registered
- 2010-06-02
- Last changed
- 2016-09-26
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 2 with no ROA
- ROAs
- 0 authorising AS12228
- ASPA
- no ASPA record
- IRR
- 100% registered · 2 of 2 announcements
- Route objects
- 1 naming AS12228
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