AS12228 — 2CO

AS12228 announces 2 IPv4 prefixes covering 3,072 addresses and 0 IPv6 prefixes.

About this network

The network of a cancer treatment provider operating clinics across Florida.

What it's used for

• Clinical and corporate networking from two adjacent blocks, 104.251.16.0/21 and 104.251.24.0/22, 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 is 21C-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.

Announced prefixes

• 104.251.16.0/21
• 104.251.24.0/22

Upstream networks

• AS23314 Summit Broadband

Adjacent networks

• AS23314 Summit Broadband