AS11773
The University Of Texas M.D. Anderson Cancer Center
ARIN US active Announced
More ASNs in the United States → Organization
The University Of Texas M.D. Anderson Cancer Center
UTMDACC
Registered
Dec 15, 1998
27 years ago
IPv4 Prefixes
4
65,792 addresses
IPv6 Prefixes
0
BGP Neighbours
4
4 upstream/peer · 0 downstream
Registration
AS Number AS11773 AS Name UTMDACC Organization The University Of Texas M.D. Anderson Cancer Center Organization ID UTMACC Address 1155 Pressler Street, Houston, TX, 77030, United States Country United States (US) Registry ARIN Allocated Dec 15, 1998 Record Created Dec 15, 1998 Last Updated Mar 20, 2012 Status
active
WHOIS Server whois.arin.net AS Description UTMDACC - The University Of Texas M.D. Anderson Cancer Center, US Abuse Email [email protected] Abuse Phone +1-713-792-1400 IPv4 Prefixes
4 prefixes · 65,792 addresses · 2 top-level Routing data as of 2026-10-07 08:00 UTC
| Prefix | Range | Addresses |
|---|---|---|
| 143.111.0.0/16 | 143.111.0.0 – 143.111.255.255 | 65,536 |
| 143.111.5.0/24 | 143.111.5.0 – 143.111.5.255 | 256 |
| 143.111.86.0/24 | 143.111.86.0 – 143.111.86.255 | 256 |
| 192.108.242.0/24 | 192.108.242.0 – 192.108.242.255 | 256 |
IPv6 Prefixes
This AS does not currently announce any IPv6 prefixes.
BGP Neighbours
4 unique neighbours · 4 upstream/peer · 0 downstream. A neighbour can be seen on more than one side. Rows are ordered by AS paths: the number of BGP paths seen by RIPE RIS that contain the adjacency. Sightings count each IPv4/IPv6 route with the adjacency once per RIS peer that sees it (routes × peers), so they show how widely it is seen, not how many distinct routes it carries. Networks seen to the left of this AS in BGP paths, toward the route collectors — typically its transit providers (upstreams) and peers. Upstream & peer side (4)
Raw RDAP Response
{
"endAutnum": 11773,
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2024-07-23T16:20:00-04:00"
},
{
"eventAction": "registration",
"eventDate": "2007-09-20T11:18:07-04:00"
}
],
"handle": "NETWO2005-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/NETWO2005-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/11773"
},
{
"href": "https://whois.arin.net/rest/poc/NETWO2005-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/11773"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"remarks": [
{
"description": [
"ARIN has attempted to validate the data for this POC, but has received no response from the POC since 2025-07-23"
],
"title": "Unvalidated POC"
}
],
"roles": [
"abuse",
"administrative",
"technical"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "1155 Pressler Street\nHouston\nTX\n77030\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"Network Services"
],
[
"org",
{},
"text",
"The University Of Texas M.D. Anderson Cancer Center"
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-713-792-1400"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2011-09-24T08:30:57-04:00"
},
{
"eventAction": "registration",
"eventDate": "1990-03-26T00:00:00-05:00"
}
],
"handle": "UTMACC",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/UTMACC",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/11773"
},
{
"href": "https://whois.arin.net/rest/org/UTMACC",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/11773"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"registrant"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"The University Of Texas M.D. Anderson Cancer Center"
],
[
"adr",
{
"label": "1155 Pressler Street\nHouston\nTX\n77030\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"kind",
{},
"text",
"org"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2012-03-20T10:38:58-04:00"
},
{
"eventAction": "registration",
"eventDate": "1998-12-15T00:00:00-05:00"
}
],
"handle": "AS11773",
"links": [
{
"href": "https://rdap.arin.net/registry/autnum/11773",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/11773"
},
{
"href": "https://whois.arin.net/rest/asn/AS11773",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/11773"
}
],
"name": "UTMDACC",
"notices": [
{
"description": [
"By using the ARIN RDAP/Whois service, you are agreeing to the RDAP/Whois Terms of Use"
],
"links": [
{
"href": "https://www.arin.net/resources/registry/whois/tou/",
"rel": "terms-of-service",
"type": "text/html",
"value": "https://rdap.arin.net/registry/autnum/11773"
}
],
"title": "Terms of Service"
},
{
"description": [
"If you see inaccuracies in the results, please visit: "
],
"links": [
{
"href": "https://www.arin.net/resources/registry/whois/inaccuracy_reporting/",
"rel": "inaccuracy-report",
"type": "text/html",
"value": "https://rdap.arin.net/registry/autnum/11773"
}
],
"title": "Whois Inaccuracy Reporting"
},
{
"description": [
"Copyright 1997-2026, American Registry for Internet Numbers, Ltd."
],
"title": "Copyright Notice"
}
],
"objectClassName": "autnum",
"port43": "whois.arin.net",
"rdapConformance": [
"nro_rdap_profile_0",
"rdap_level_0",
"nro_rdap_profile_asn_flat_0"
],
"startAutnum": 11773,
"status": [
"active"
]
} Contact details of private individuals are redacted.