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Network · ASN lookup

AS20057: AT&T

AS20057 belongs to AT&T and is registered in the United States.

Facts about AS20057

Dataset read 2026-11-01 What the public iptoasn.com dataset held for AS20057 on the day this copy was read. It is refreshed about once a month. IPv4 only

AS number

AS20057

Registered descriptionATT-MOBILITY-LLC-AS20057

USUnited States
IPv4 addresses The addresses in all 374 of its ranges. The share is that total over the 4,294,967,296 addresses of the whole IPv4 space.
3,979,776
0.093% of the whole IPv4 space
IPv4 ranges
374
Kind of network
Mobile
Hosting network Yes only when the AS number is on our list of hosting and cloud networks. Not on our list says nothing about what kind of network it is.
Not on our list

The 15 largest ranges below hold 43.4% of its addresses Each segment is one of the ranges listed below, drawn at its share of all 3,979,776 addresses of AS20057. The empty part is every other range. 1,727,744 of 3,979,776

Country: United States (US), as the registry holds it. Where the network is registered, which is not always where its customers are. Open AS20057 in the ASN lookup

Largest IPv4 ranges of AS20057

Each bar is the range's address count against the largest one. A prefix such as /12 shows when a range is exactly one aligned CIDR block.

The 15 largest of 374, biggest first

Largest IPv4 ranges of AS20057, with the number of addresses in each
#First address to last addressSize against the largest rangeAddresses
01166.131.225.0 to 166.136.115.255299,776
02166.128.0.0 to 166.131.26.255203,520
03107.233.0.0 to 107.235.255.255196,608
04107.106.0.0 to 107.107.255.255/15131,072
05166.213.164.0 to 166.215.152.255128,256
06166.201.234.0 to 166.203.143.255108,032
07166.172.124.0 to 166.173.187.25581,920
08166.175.0.0 to 166.176.59.25580,896
09166.186.198.0 to 166.187.255.25580,384
10166.170.6.0 to 166.171.59.25579,360
11166.217.0.0 to 166.218.25.25572,192
12166.212.0.0 to 166.213.6.25567,328
13107.92.187.0 to 107.93.191.25566,816
14107.80.254.0 to 107.81.255.25566,048
15155.170.0.0 to 155.170.255.255/1665,536

Using this network with a proxy

It targets that one network, and it is not applied on geo-forced pools. If no exit on the network is available, the request fails instead of falling back to another network. We do not publish which networks are available at a given time.

A request names it with the asn option, written AS20057 or 20057. Every pool takes it: Essential and Premium Residential, and Mobile.

Essential and Premium