Sign inMonitor a domain
AS20057

AS20057 is AT&T Mobility’s mobile network.

Last updated 3 Nov 2026 from DB-IP ASN Lite (2026-11-01) and RIR statistics (4 Nov 2026)

Short answer

AS20057 belongs to AT&T Enterprises, LLC. DB-IP Lite attributes 4,014,080 IPv4 addresses in 91 ranges and 18 IPv6 ranges to it, all or nearly all of the IPv4 space in United States. The number is registered with ARIN in United States on 20 Mar 2001.

Facts for AS20057
Operator (DB-IP)AT&T Enterprises, LLC
KindMobile carrier (curated)
IPv4 addresses4,014,080
IPv4 ranges91
IPv6 ranges18
RegistryARIN
Registered20 Mar 2001
Registry countryUnited States (US)

Does it publish a geofeed?

Not for the range we sampled (107.232.0.0 – 107.235.255.255): its registry record, and the record above it, link no RFC 8805 geofeed (checked 2 Nov 2026). Without one, location databases have to estimate where these addresses are used, which is a common reason customers of AT&T Mobility see the wrong city. Customers can ask AT&T Mobility to publish one; the evidence report drafts that request.

Shared addresses (CGNAT)

AT&T Mobility hasn’t been documented as using carrier-grade NAT in a source we could check. To see whether your own connection is behind it, compare your router’s address on the CGNAT check.

IPv6

DB-IP lists 18 IPv6 ranges for AS20057, so customers can get IPv6 addresses, which databases place separately from IPv4.

Where its IPv4 space is used, according to DB-IP

US100%
PR0.00%

Share of the network’s IPv4 addresses by DB-IP Country Lite. IP Geolocation by DB-IP.

IP ranges

RangeAs CIDRAddresses
12.72.0.0 – 12.73.127.25512.72.0.0/16, 12.73.0.0/1798,304
66.102.186.0 – 66.102.186.25566.102.186.0/24256
107.72.162.0 – 107.72.165.255107.72.162.0/23, 107.72.164.0/231,024
107.72.174.0 – 107.72.174.255107.72.174.0/24256
107.72.176.0 – 107.72.178.255107.72.176.0/23, 107.72.178.0/24768
107.72.225.0 – 107.72.225.255107.72.225.0/24256
107.77.64.0 – 107.77.97.255107.77.64.0/19, 107.77.96.0/238,704
107.77.100.0 – 107.77.111.255107.77.100.0/22, 107.77.104.0/213,072
107.77.192.0 – 107.77.192.255107.77.192.0/24256
107.77.194.0 – 107.77.237.255107.77.194.0/23, 107.77.196.0/22 …11,264
107.80.0.0 – 107.80.5.255107.80.0.0/22, 107.80.4.0/231,536
107.80.7.0 – 107.81.255.255107.80.7.0/24, 107.80.8.0/21 …129,280
107.84.0.0 – 107.84.151.255107.84.0.0/17, 107.84.128.0/20 …38,912
107.84.153.0 – 107.85.255.255107.84.153.0/24, 107.84.154.0/23 …91,904
107.87.0.0 – 107.87.127.255107.87.0.0/1732,768
107.87.136.0 – 107.87.139.255107.87.136.0/221,024
107.87.144.0 – 107.87.154.255107.87.144.0/21, 107.87.152.0/23 …2,816
107.87.192.0 – 107.87.255.255107.87.192.0/1816,384
107.89.0.0 – 107.92.127.255107.89.0.0/16, 107.90.0.0/15 …229,376
107.92.184.0 – 107.92.186.255107.92.184.0/23, 107.92.186.0/24768
107.92.188.0 – 107.93.191.255107.92.188.0/22, 107.92.192.0/18 …66,560
107.94.128.0 – 107.94.128.255107.94.128.0/24256
107.94.248.0 – 107.94.251.255107.94.248.0/221,024
107.95.112.0 – 107.95.112.255107.95.112.0/24256
107.106.0.0 – 107.107.255.255107.106.0.0/15131,072
107.112.215.0 – 107.112.215.255107.112.215.0/24256
107.118.0.0 – 107.118.255.255107.118.0.0/1665,536
107.125.24.0 – 107.125.24.255107.125.24.0/24256
107.125.128.0 – 107.125.255.255107.125.128.0/1732,768
107.126.128.0 – 107.126.255.255107.126.128.0/1732,768
107.127.128.0 – 107.127.255.255107.127.128.0/1732,768
107.232.0.0 – 107.235.255.255107.232.0.0/14262,144
107.241.0.0 – 107.241.125.255107.241.0.0/18, 107.241.64.0/19 …32,256
107.241.128.0 – 107.241.255.255107.241.128.0/1732,768
107.250.0.0 – 107.250.31.255107.250.0.0/198,192
108.144.128.0 – 108.144.255.255108.144.128.0/1732,768
108.146.0.0 – 108.146.255.255108.146.0.0/1665,536
135.211.200.0 – 135.211.200.255135.211.200.0/24256
135.211.206.0 – 135.211.206.255135.211.206.0/24256
135.211.216.0 – 135.211.216.255135.211.216.0/24256
135.211.221.0 – 135.211.221.255135.211.221.0/24256
135.211.232.0 – 135.211.232.255135.211.232.0/24256
135.211.237.0 – 135.211.237.255135.211.237.0/24256
135.211.248.0 – 135.211.248.255135.211.248.0/24256
135.211.254.0 – 135.211.254.255135.211.254.0/24256
155.163.0.0 – 155.163.57.255155.163.0.0/19, 155.163.32.0/20 …14,848
155.163.64.0 – 155.163.255.255155.163.64.0/18, 155.163.128.0/1749,152
155.166.0.0 – 155.166.255.255155.166.0.0/1665,536
155.170.0.0 – 155.170.255.255155.170.0.0/1665,536
166.128.0.0 – 166.131.82.255166.128.0.0/15, 166.130.0.0/16 …217,856
2600:380:: – 2600:380:1bff:ffff:ffff:ffff:ffff:ffff2600:380::/36IPv6
2600:380:2000:: – 2600:380:35ff:ffff:ffff:ffff:ffff:ffff2600:380:2000::/36IPv6
2600:380:3b00:: – 2600:380:63ff:ffff:ffff:ffff:ffff:ffff2600:380:3b00::/40IPv6
2600:380:6c00:: – 2600:380:73ff:ffff:ffff:ffff:ffff:ffff2600:380:6c00::/38IPv6
2600:380:7e80:: – 2600:380:80ff:ffff:ffff:ffff:ffff:ffff2600:380:7e80::/41IPv6
2600:380:8800:: – 2600:380:88ff:ffff:ffff:ffff:ffff:ffff2600:380:8800::/40IPv6
2600:380:a400:: – 2600:380:a7ff:ffff:ffff:ffff:ffff:ffff2600:380:a400::/38IPv6
2600:380:b000:: – 2600:380:c7ff:ffff:ffff:ffff:ffff:ffff2600:380:b000::/36IPv6
2600:380:f100:: – 2600:380:f102:ffff:ffff:ffff:ffff:ffff2600:380:f100::/47IPv6
2600:380:f104:: – 2600:380:f106:ffff:ffff:ffff:ffff:ffff2600:380:f104::/47IPv6
2600:380:f108:: – 2600:380:f10a:ffff:ffff:ffff:ffff:ffff2600:380:f108::/47IPv6
2600:380:f10c:: – 2600:380:f10e:ffff:ffff:ffff:ffff:ffff2600:380:f10c::/47IPv6
2600:380:f1c0:: – 2600:380:f1db:ffff:ffff:ffff:ffff:ffff2600:380:f1c0::/44IPv6
2600:380:f1e0:: – 2600:380:f1f0:ffff:ffff:ffff:ffff:ffff2600:380:f1e0::/44IPv6
2600:380:f1f2:: – 2600:380:f1f3:ffff:ffff:ffff:ffff:ffff2600:380:f1f2::/47IPv6
2600:380:f1fa:: – 2600:380:f1fa:ffff:ffff:ffff:ffff:ffff2600:380:f1fa::/48IPv6
2600:380:fe00:: – 2600:381:3ff:ffff:ffff:ffff:ffff:ffff2600:380:fe00::/39IPv6
2600:387:: – 2600:387:b:ffff:ffff:ffff:ffff:ffff2600:387::/45IPv6
Showing 50 of 91 IPv4 and 18 of 18 IPv6 ranges All ranges (CSV)

IP Geolocation by DB-IP, ASN Lite, CC BY 4.0.

Using an address from this network? See which sources agree on where it is.

Sources

  1. DB-IP IP to ASN Lite (CC BY 4.0) · checked 3 Nov 2026
  2. NRO RIR delegated-extended statistics · checked 5 Nov 2026