Autonomous system
AS11773 UTMDACC
Education ARIN
Summary
University of Texas MD Anderson Cancer Center
education research university legacy
UTMDACC is the University of Texas M.D. Anderson Cancer Center, the comprehensive cancer hospital and research institution in the Texas Medical Center in Houston. It is part of the University of Texas System: a treating hospital, a research enterprise and a degree-granting academic institution in one organisation.
What it's used for
The institution's own campus network. RIS shows 65,792 IPv4 addresses, dominated by a single 143.111.0.0/16, with 4 observed BGP neighbours and no IPv6 in the table. A /16 behind four peers is an end-site, not a carrier — the address space serves clinical, research and administrative systems on one very large campus rather than transiting anyone else's traffic. Reverse DNS confirms the character of it: 143.111.5.5 answers as mdavpnr.mdanderson.org, a remote-access concentrator, and 143.111.86.133 as nursg09pub-133.mdacc.tmc.edu — a nursing-unit host under the institution's Texas Medical Center domain. Clinical endpoints, staff access and research computing, all first-party.
Notable
Every announced prefix registers to MD Anderson itself under MDANET netnames, including the smaller 192.108.242.0/24. There is no third-party registrant anywhere in the inventory and no reason to look for one. The /24s that appear alongside the /16 are more-specifics of space the institution already holds, announced separately — a routine traffic-engineering or multihoming choice, not separate inventory.
Interesting
The reverse DNS spans two domains, mdanderson.org and mdacc.tmc.edu, reflecting the institution's dual identity: a hospital brand facing patients and an academic one inside the Texas Medical Center's .edu namespace.
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
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-18, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 15 prefixes · 65.79K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 15 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS11773- Registry name
- UTMDACC
- Registrant
- The University Of Texas M.D. Anderson Cancer Center
- Abuse contact
- ipsupport@mdanderson.org
- Registered
- 1998-12-15
- Last changed
- 2012-03-20
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 5 with no ROA
- ROAs
- 0 authorising AS11773
- ASPA
- no ASPA record
- IRR
- 100% registered · 5 of 5 announcements
- Route objects
- 4 naming AS11773
Reputation
Classification and threat
Education University, school or national research and education network.
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 1,784 prefixes, as published 2026-10-19. 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