Autonomous System

AS16857 Central Texas Telecommunications

ISPActiveUnited StatesARIN

AS16857 (CENTEX) is an ISP network operated by Central Texas Telecommunications in United States, registered with ARIN. It has 28 IPv4 prefixes with 15,104 addresses, which makes it the 8,186th largest of 82,200 active autonomous systems by IPv4 space.

IPv4 addresses15,104in 28 prefixes
IPv6 prefixes0none
Size rank#8,186of 82,200 active ASNs
Abuser scoreVery Low0.03% of its addresses flagged · method

Details

OrganizationCentral Texas Telecommunications
AS nameCENTEX
Websitecentex.net
Country United States (US)
Network typeISP
RegistryARIN
Abuse contactshawnc@centexnet.com
Registered2000-06-20
Last updated2019-09-04

IPv4 prefixes

28 prefixes · 15,104 addresses
NetworkAddressesFirst – last address
209.55.72.0/212,048209.55.72.0 – 209.55.79.255
209.55.96.0/212,048209.55.96.0 – 209.55.103.255
209.55.104.0/212,048209.55.104.0 – 209.55.111.255
69.7.88.0/221,02469.7.88.0 – 69.7.91.255
66.208.102.0/2351266.208.102.0 – 66.208.103.255
74.84.20.0/2351274.84.20.0 – 74.84.21.255
74.84.22.0/2351274.84.22.0 – 74.84.23.255
74.84.28.0/2351274.84.28.0 – 74.84.29.255
209.55.64.0/23512209.55.64.0 – 209.55.65.255
209.55.104.0/23512209.55.104.0 – 209.55.105.255
209.55.106.0/23512209.55.106.0 – 209.55.107.255
66.208.96.0/2425666.208.96.0 – 66.208.96.255
66.208.97.0/2425666.208.97.0 – 66.208.97.255
66.208.99.0/2425666.208.99.0 – 66.208.99.255
66.208.105.0/2425666.208.105.0 – 66.208.105.255
66.208.110.0/2425666.208.110.0 – 66.208.110.255
66.208.111.0/2425666.208.111.0 – 66.208.111.255
69.7.80.0/2425669.7.80.0 – 69.7.80.255
69.7.81.0/2425669.7.81.0 – 69.7.81.255
69.7.82.0/2425669.7.82.0 – 69.7.82.255
69.7.85.0/2425669.7.85.0 – 69.7.85.255
74.84.8.0/2425674.84.8.0 – 74.84.8.255
74.84.9.0/2425674.84.9.0 – 74.84.9.255
74.84.10.0/2425674.84.10.0 – 74.84.10.255
209.55.64.0/24256209.55.64.0 – 209.55.64.255
The 25 largest of 28. The API and the database have all of them.

IPv6 prefixes

No IPv6 prefixes.

Query AS16857 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=AS16857&key=YOUR_API_KEY"

Any address in its prefixes resolves to AS16857, with or without a key:

curl "https://api.ipapi.is/?q=209.55.72.1"

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