asn.dev

Autonomous system

AS40479 AURORA-HEALTH-CARE

Unclassified ARIN

IPv4 addresses 8.19K 5 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly US
Exchanges 0 recorded by PCH
Upstreams 3 0 downstream
Flagged prefixes 0 none

Summary

Aurora Health Care

United States of America · AI-generated

healthcare business internal

AURORA-HEALTH-CARE is held by Aurora Health Care, Inc.

What it's used for

  • The address space carries internal corporate infrastructure, evidenced by the netname NETBLK-AURORANET and registrant "Aurora Health Care, Inc.; Network Operations" across all five prefixes.
  • The AS announces 8,192 IPv4 addresses across 5 prefixes with only 3 observed neighbours, indicating a small, self-contained internal network rather than a transit or access provider.
  • Traffic from this AS consists of internal communications for a large healthcare system, including hospital operations, clinical systems, and administrative backhaul for facilities across Wisconsin.

Notable

  • All registrants align with the announcer, consistently listing "Aurora Health Care, Inc.; Network Operations" for every announced prefix.
  • Aurora Health Care was formerly part of Advocate Aurora Health, a non-profit hospital network that merged with Atrium Health in 2021; the Wisconsin operations retained the Aurora Health Care name and identity.
  • The inventory is finely subdivided into five contiguous blocks within the 198.177.64.0/18 range, reflecting site-by-site segmentation typical of a large corporate estate.

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

3 upstream, 0 downstream and 3 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS7018AT&T Enterprises, LLC527
AS40264Charter Communications LLC125
AS18683Midwest Fiber Networks, LLC79

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-31, 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 5 prefixes · 8.19K addresses IPv6 0 prefixes

CountryNamePrefixes
USUnited States of America5

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS40479
Registry name
AURORA-HEALTH-CARE
Registrant
Aurora Health Care, Inc.
Abuse contact
security@aah.org
Registered
2007-03-01
Last changed
2019-11-12
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 12 with no ROA
ROAs
0 authorising AS40479
ASPA
no ASPA record
IRR
100% registered · 12 of 12 announcements
Route objects
6 naming AS40479

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 1,845 prefixes, as published 2026-10-31. 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