asn.dev

Autonomous system

AS33328 NORTON-HEALTHCARE

Unclassified ARIN

IPv4 addresses 1.79K 3 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

Norton Healthcare

United States of America · AI-generated

healthcare business enterprise

NORTON-HEALTHCARE is the autonomous system for Norton Healthcare, a major hospital system operating in Kentucky and Indiana.

What it's used for

  • The address space is primarily associated with the registrant Norton Healthcare, Inc., as seen in the netname NORTO for the largest prefix.
  • The AS announces 1792 IPv4 addresses across 3 prefixes, with only 2 observed neighbours, indicating a small, self-contained internal corporate network rather than a transit or access provider.

Notable

  • Registrants are mixed: the largest block (134.49.136.0/22) is registered to Norton Healthcare, Inc., while the smaller blocks (205.152.158.0/23 and 205.152.157.0/24) are registered to BRB-BMF BRIB.
  • The address inventory is finely subdivided into three distinct prefixes, consistent with site-by-site segmentation for a large corporate estate.
  • The AS has been observed in routing tables since 2005.

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
AS10796Charter Communications Inc259
AS7018AT&T Enterprises, LLC175

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-15, 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 3 prefixes · 1.79K addresses IPv6 0 prefixes

CountryNamePrefixes
USUnited States of America3

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS33328
Registry name
NORTON-HEALTHCARE
Registrant
Norton Healthcare, Inc.
Abuse contact
abuse@nortonhealthcare.org
Registered
2004-11-23
Last changed
2012-03-02
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 7 with no ROA
ROAs
0 authorising AS33328
ASPA
no ASPA record
IRR
100% registered · 7 of 7 announcements
Route objects
10 naming AS33328

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: 442 networks and 1,782 prefixes, as published 2026-10-16. 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