Autonomous System

AS18791 Texas Christian University

EducationActiveUnited StatesARIN

AS18791 (TCU) is an education network operated by Texas Christian University in United States, registered with ARIN. It has 2 IPv4 prefixes with 65,792 addresses, which makes it the 3,462nd largest of 82,200 active autonomous systems by IPv4 space.

IPv4 addresses65,792in 2 prefixes
IPv6 prefixes0none
Size rank#3,462of 82,200 active ASNs
Abuser scoreVery Low0.01% of its addresses flagged · method

Details

OrganizationTexas Christian University
AS nameTCU
Websitetcu.edu
Country United States (US)
Network typeEducation
RegistryARIN
Abuse contacta.v.munoz@tcu.edu
Registered2000-10-11
Last updated2023-05-17

IPv4 prefixes

2 prefixes · 65,792 addresses
NetworkAddressesFirst – last address
138.237.0.0/1665,536138.237.0.0 – 138.237.255.255
74.200.134.0/2425674.200.134.0 – 74.200.134.255

IPv6 prefixes

No IPv6 prefixes.

Query AS18791 with the API

The ASN lookup returns everything on this page as JSON, including every prefix. ASN lookups need an API key: a free account comes with 1,000 requests a day. 

curl "https://api.ipapi.is/?q=AS18791&key=YOUR_API_KEY"

Any address in its prefixes resolves to AS18791, with or without a key:

curl "https://api.ipapi.is/?q=138.237.0.1"

Largest networks in United States

AS749 United States Department of Defense (DoD)227,464,192 IPv4 addressesAS16509 Amazon.com, Inc.218,038,784 IPv4 addressesAS7018 AT&T Enterprises, LLC117,262,080 IPv4 addressesAS8075 Microsoft Corporation81,463,040 IPv4 addressesAS721 United States Department of Defense (DoD)73,070,080 IPv4 addressesAS7922 Comcast Cable Communications, LLC68,336,896 IPv4 addresses