AS33226 — SUMMAHEALTH-ASN - Summa Health System

AS33226 announces 2 IPv4 prefixes covering 3,072 addresses and 0 IPv6 prefixes.

About this network

The AS handle SUMMAHEALTH-ASN is held by Summa Health System.

What it's used for

• The address space carries internal corporate infrastructure, evidenced by reverse DNS records pointing to summa-health.org and netnames registered as NETBLK-SUMHLTHS.
• The inventory consists of 4096 IPv4 addresses across 6 prefixes, with only 2 observed neighbours, indicating a small, self-contained internal network rather than a transit or access provider.

Notable

• All registrants for the announced prefixes are listed as Summa Health System, matching the AS holder.
• Summa Health System was formed from the merger of Akron City Hospital and St. Thomas hospitals, rebranding to unify the healthcare system in Northeast Ohio.
• The address inventory is finely subdivided into two /22 blocks and four /23 blocks, consistent with site-by-site segmentation for a large corporate estate.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 199.83.64.0/21
• 199.83.72.0/22

Upstream networks

• AS198949 Radware Ltd
• AS14230 ARK Data Centers LLC

Adjacent networks

• AS198949 Radware Ltd
• AS14230 ARK Data Centers LLC

Routing security

• RPKI: 0 valid, 0 invalid and 6 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 17% of announcements registered; 1 route objects.
• Listed in as-sets: AS-CHTR-SYNC, AS-FUSION, AS-HURRICANE, AS-RR-SYNC, AS198949:AS-SD, AS33226:AS-CONE, AS393238:AS-INVOLTA.