asn.dev

Autonomous system

AS53937 SMH-AS-NO

Unclassified ARIN

IPv4 addresses 512 1 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

Sarasota Memorial Hospital

United States of America · AI-generated

hospital business healthcare us

SMH-AS-NO is operated by Sarasota Memorial Hospital.

What it's used for

  • The address space carries internal hospital infrastructure, as indicated by the netname SMH-204-193-28 and the registrant Sarasota Memorial Hospital.
  • The AS announces 512 IPv4 addresses across 1 prefix (204.193.28.0/23) with 2 observed neighbours, a ratio consistent with a single-site corporate or institutional network rather than a transit or access provider.
  • Traffic from this AS consists of internal clinical, administrative, and IT systems for a 901-bed publicly owned healthcare facility in Sarasota, Florida.

Notable

  • The RDAP registrant Sarasota Memorial Hospital matches the AS holder and the netname SMH-204-193-28, confirming consistent ownership.
  • The address inventory is a single contiguous /23 block, typical of a dedicated institutional allocation.

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
AS33661Comcast Cable Communications, LLC90
AS33132Crown Castle Fiber LLC30

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 1 prefixes · 512 addresses IPv6 0 prefixes

CountryNamePrefixes
USUnited States of America1

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS53937
Registry name
SMH-AS-NO
Registrant
Sarasota Memorial Hospital
Abuse contact
tom-topolski@smh.com
Registered
2014-06-13
Last changed
2014-06-13
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 2 with no ROA
ROAs
0 authorising AS53937
ASPA
no ASPA record
IRR
0% registered · 0 of 2 announcements 2 other origin
Route objects
0 naming AS53937

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