asn.dev

Autonomous system

AS35988 UMASS-MEMORIAL-HEALTH-CARE

Unclassified ARIN

IPv4 addresses 4.35K 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

UMass Memorial Health

United States of America · AI-generated

healthcare business internal

The AS handle UMASS-MEMORIAL-HEALTH-CARE is held by UMass Memorial Health Care Inc.

What it's used for

  • The address space carries internal corporate infrastructure for a healthcare system, with netnames UMHC and UMR-7 registered to UMass Memorial entities.
  • The inventory consists of 4 IPv4 prefixes totaling 4352 addresses, observed against only 2 routing neighbours, indicating a small, self-contained internal network rather than a transit or access provider.

Notable

  • Registrants align with the announcer, listing Umass Memorial health care inc for the main blocks and UMass Memorial Realty, Inc. for the 66.9.45.0/24 prefix.
  • The address inventory is finely subdivided into four distinct prefixes, consistent with site-by-site segmentation for a multi-facility healthcare organization.

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
AS20115Charter Communications LLC149
AS46887Crown Castle Fiber LLC32

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-14, 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 · 4.35K addresses IPv6 0 prefixes

CountryNamePrefixes
USUnited States of America4

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS35988
Registry name
UMASS-MEMORIAL-HEALTH-CARE
Registrant
Umass Memorial health care inc
Abuse contact
roy.cloud@umassmemorial.org
Registered
2008-01-24
Last changed
2012-03-20
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 3 with no ROA
ROAs
0 authorising AS35988
ASPA
no ASPA record
IRR
100% registered · 3 of 3 announcements
Route objects
3 naming AS35988

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 1,771 prefixes, as published 2026-10-15. 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