asn.dev

Autonomous system

AS12250 EHSC - EDWARD HEALTH SERVICE CORP

Unclassified ARIN

IPv4 addresses 1.28K 4 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly US
Exchanges 0 recorded by PCH
Upstreams 2 0 downstream
Flagged prefixes 0 none

Summary

Edward Health Service Corp

United States · AI-generated

healthcare enterprise legacy

The network of Edward Hospital and its associated health services in the western suburbs of Chicago.

What it's used for

  • Hospital and clinic systems. 1,280 addresses over four prefixes with two observed BGP neighbours, no IPv6 announced.

Notable

  • Four prefixes carry four carriers' fingerprints. EEH-PUBIP is the hospital's own; CCCH3-4 is Comcast's; SBC-65-42-192-0-24-0708070819 is SBC's, with a ten-digit stamp on the end; and Q0605-216-207-220-0 carries the Q prefix and a 0605 date that Qwest used on its assignments.
  • Reverse DNS matches the split. One block answers under ded.ameritech.net, the "dedicated" space of SBC's midwestern brand; another answers under edward.org, the hospital's own domain.

Interesting

  • This is what a hospital's procurement history looks like from the outside. Four blocks from four different providers, each labelled in that provider's house style, all announced under one AS number so the hospital can change any of them without renumbering anything.
  • The Comcast netname CCCH3-4 also turns up on a block announced by Ascensus at AS12152. It is not a customer identifier at all — it labels a Comcast pool that assignments are cut from, so the same string appears across unrelated businesses. Netnames look like names and are frequently nothing of the kind.

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

Full topology · Graph

Internet exchanges

No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.

Transit providers

2 upstream, 0 downstream and 2 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS7018AT&T Enterprises, LLC177
AS33491Comcast Cable Communications, LLC117

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-07, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 4 prefixes · 1.28K addresses IPv6 0 prefixes

CountryNamePrefixes
USUnited States of America4

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS12250
Registry name
EHSC
Registrant
EDWARD HEALTH SERVICE CORP
Abuse contact
kmikol@edward.org
Registered
2007-09-25
Last changed
2012-03-02
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
20% valid · 1 valid, 4 with no ROA
ROAs
1 authorising AS12250
ASPA
no ASPA record
IRR
40% registered · 2 of 5 announcements
Route objects
2 naming AS12250

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: 454 networks and 1,852 prefixes, as published 2026-11-08. 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

Cross-check