asn.dev

Autonomous system

AS26971 -Reserved AS-

Unclassified ARIN

IPv4 addresses 65.54K 1 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly Unknown
Exchanges 0 recorded by PCH
Upstreams 2 1 downstream
Flagged prefixes 0 none

Summary

University of Texas Health Science Center at San Antonio

unknown · AI-generated

education business research

The AS handle -Reserved AS- is held by University of Texas Health Science Center at San Antonio.

What it's used for

  • The address space is registered under the netname UTHSCSA for the University of Texas Health Science Center at San Antonio, indicating an institutional network.
  • The AS announces 65536 IPv4 addresses across 1 prefix (129.111.0.0/16) and maintains 2 observed neighbours, a ratio consistent with a single-site institutional or business network rather than a transit provider.

Notable

  • The RDAP registrant University of Texas Health Science Center at San Antonio aligns with the netname UTHSCSA for the announced prefix.
  • The inventory consists of a single contiguous /16 block, representing a standard allocation for a large academic or medical institution.

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, 1 downstream and 4 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS6922Texas Department of Information Resources57
AS276University of Texas System5

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-11, 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 · 65.54K addresses IPv6 0 prefixes

CountryNamePrefixes
Unknown1

Registry

Allocation record

ARIN · via Atlas (registry data)
Registry
ARIN
Allocation
reserved

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 1 with no ROA
ROAs
0 authorising AS26971
ASPA
no ASPA record
IRR
100% registered · 1 of 1 announcements
Route objects
1 naming AS26971

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: 431 networks and 1,768 prefixes, as published 2026-10-12. 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