asn.dev

Autonomous system

AS36364 MHSNET

Unclassified ARIN

IPv4 addresses 768 2 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

Mary Washington Healthcare

United States of America · AI-generated

hospital business healthcare internal

MHSNET is the autonomous system for Mary Washington Healthcare, a regional medical center in Fredericksburg, Virginia.

What it's used for

  • The address space carries internal corporate infrastructure, evidenced by the netname MARY-WASH-HEALTHCARE and registrant Mary Washington Hospital, Inc. on both announced prefixes.
  • The AS announces 768 IPv4 addresses across 2 prefixes (198.179.158.0/23 and 198.179.157.0/24) with only 3 observed neighbours, indicating a small, self-contained internal network rather than a transit or access provider.

Notable

  • Registrants align perfectly with the announcer, with both prefixes registered to Mary Washington Hospital, Inc. under the netname MARY-WASH-HEALTHCARE.
  • The address inventory is compact and finely subdivided into two contiguous blocks, consistent with a single-site corporate estate rather than a distributed service network.

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
AS21508Comcast Cable Communications, LLC64
AS22773Cox Communications Inc.58
AS7018AT&T Enterprises, LLC56

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-25, 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 2 prefixes · 768 addresses IPv6 0 prefixes

CountryNamePrefixes
USUnited States of America2

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS36364
Registry name
MHSNET
Registrant
Mary Washington Hospital, Inc.
Abuse contact
spo@mwhc.com
Registered
2005-12-14
Last changed
2015-04-16
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 3 with no ROA
ROAs
0 authorising AS36364
ASPA
no ASPA record
IRR
33% registered · 1 of 3 announcements
Route objects
1 naming AS36364

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: 443 networks and 1,779 prefixes, as published 2026-10-24. 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