Autonomous System

AS20057 AT&T Enterprises, LLC

ISPActiveUnited StatesARIN

AS20057 (ATT-MOBILITY-LLC-AS20057) is an ISP network operated by AT&T Enterprises, LLC in United States, registered with ARIN. It has 1,449 IPv4 prefixes with 6,499,584 addresses and 161 IPv6 prefixes, which makes it the 108th largest of 82,200 active autonomous systems by IPv4 space.

IPv4 addresses6,499,584in 1,449 prefixes
IPv6 prefixes161≈ 7.3 × 10²⁸ addresses
Size rank#108of 82,200 active ASNs
Abuser scoreVery Lowunder 0.01% of its addresses flagged · method

Details

OrganizationAT&T Enterprises, LLC
AS nameATT-MOBILITY-LLC-AS20057
Websiteatt.com
Country United States (US)
Network typeISP
RegistryARIN
Abuse contactabuse@att.net
Registered2001-03-20
Last updated2025-03-18

IPv4 prefixes

1,449 prefixes · 6,499,584 addresses
NetworkAddressesFirst – last address
166.128.0.0/14262,144166.128.0.0 – 166.131.255.255
166.132.0.0/14262,144166.132.0.0 – 166.135.255.255
107.84.0.0/15131,072107.84.0.0 – 107.85.255.255
166.134.0.0/15131,072166.134.0.0 – 166.135.255.255
166.184.0.0/15131,072166.184.0.0 – 166.185.255.255
166.212.0.0/15131,072166.212.0.0 – 166.213.255.255
166.218.0.0/15131,072166.218.0.0 – 166.219.255.255
107.80.0.0/1665,536107.80.0.0 – 107.80.255.255
107.233.0.0/1665,536107.233.0.0 – 107.233.255.255
107.234.0.0/1665,536107.234.0.0 – 107.234.255.255
107.235.0.0/1665,536107.235.0.0 – 107.235.255.255
108.146.0.0/1665,536108.146.0.0 – 108.146.255.255
166.128.0.0/1665,536166.128.0.0 – 166.128.255.255
166.129.0.0/1665,536166.129.0.0 – 166.129.255.255
166.131.0.0/1665,536166.131.0.0 – 166.131.255.255
166.136.0.0/1665,536166.136.0.0 – 166.136.255.255
166.137.0.0/1665,536166.137.0.0 – 166.137.255.255
166.170.0.0/1665,536166.170.0.0 – 166.170.255.255
166.184.0.0/1665,536166.184.0.0 – 166.184.255.255
166.185.0.0/1665,536166.185.0.0 – 166.185.255.255
166.186.0.0/1665,536166.186.0.0 – 166.186.255.255
166.187.0.0/1665,536166.187.0.0 – 166.187.255.255
166.195.0.0/1665,536166.195.0.0 – 166.195.255.255
166.200.0.0/1665,536166.200.0.0 – 166.200.255.255
166.201.0.0/1665,536166.201.0.0 – 166.201.255.255
The 25 largest of 1,449. The API and the database have all of them.

IPv6 prefixes

161 prefixes
  • 2600:380::/37
  • 2600:380:800::/37
  • 2600:380:1000::/37
  • 2600:380:2000::/37
  • 2600:380:2800::/37
  • 2600:380:3000::/37
  • 2600:380:3800::/37
  • 2600:380:800::/38
  • 2600:380:c00::/38
  • 2600:380:1800::/38
  • 2600:380:4000::/38
  • 2600:380:4400::/38
  • 2600:380:4800::/38
  • 2600:380:4c00::/38
  • 2600:380:5000::/38
  • 2600:380:5400::/38
  • 2600:380:5800::/38
  • 2600:380:5c00::/38
  • 2600:380:6000::/38
  • 2600:380:6400::/38
  • 2600:380:6c00::/38
  • 2600:380:7000::/38
  • 2600:380:7c00::/38
  • 2600:380:a000::/38
  • 2600:380:a400::/38
The 25 largest of 161. The API and the database have all of them.

Query AS20057 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=AS20057&key=YOUR_API_KEY"

Any address in its prefixes resolves to AS20057, with or without a key:

curl "https://api.ipapi.is/?q=166.128.0.1"

Other networks of AT&T Enterprises, LLC

6 of 15
AS7018 AT&T Enterprises, LLC117,262,080 IPv4 addressesAS6389 AT&T Enterprises, LLC4,523,776 IPv4 addressesAS14654 AT&T Enterprises, LLC1,694,208 IPv4 addressesAS2686 AT&T Enterprises, LLC1,411,584 IPv4 addressesAS2687 AT&T Enterprises, LLC759,552 IPv4 addressesAS2688 AT&T Enterprises, LLC486,912 IPv4 addresses

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