$ query “AS20057” --type=asn → 1 result(s)

AS20057 · ATT-MOBILITY-LLC-AS20057

AT&T Wireless Service

AS20057 is operated by AT&T Wireless Service and serves as a residential access provider, based in the United States since 2007. The system announces an impressive 4.1 million IPv4 addresses, including a /13, and supports IPv6. The bulk of its IP address space is in the United States, with additional presence in Australia.

Basic Information

Country
🇺🇸 United States
Category
Internet Service Provider
Network Role
Access Provider
Data Origin
Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
Registered
May 29, 2007
Last Changed
May 10, 2026
Last Seen
June 22, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
1 463 / 112
IPv6 Prefixes (raw / aggregated)
161 / 30
IPv4 Addresses
4 101 376
Largest IPv4 Prefix
/13 (524 288 addresses)
Largest IPv6 Prefix
/35
Geolocated Countries
🇺🇸 United States (2 726 912 IPs), 🇦🇺 Australia (1 915 136 IPs)
Prefix Changed
June 13, 2026

Reputation

Reputation
Good — 8 flagged IPs out of 4 101 376 total (0.00%)

Connectivity Summary

Upstream Providers
1 upstream providing transit
Downstream Customers
1 downstream buying transit
Degree
2 unique BGP neighbors
Reach
1 network in customer cone

Upstream Providers (1)

  • AS7018 — ATT-INTERNET4 (Tier-1 transit)

Prefix Lists

IPv4 Prefixes (1 463 total)

  • 166.128.0.0/13 (524 288 addresses (/13 prefix))
  • 166.212.0.0/14 (262 144 addresses (/14 prefix))
  • 166.200.0.0/14 (262 144 addresses (/14 prefix))
  • 166.184.0.0/14 (262 144 addresses (/14 prefix))
  • 166.170.0.0/15 (131 072 addresses (/15 prefix))
  • 166.172.0.0/15 (131 072 addresses (/15 prefix))
  • 107.80.0.0/15 (131 072 addresses (/15 prefix))
  • 166.136.0.0/15 (131 072 addresses (/15 prefix))
  • 166.176.0.0/15 (131 072 addresses (/15 prefix))
  • 107.234.0.0/15 (131 072 addresses (/15 prefix))
  • 166.218.0.0/15 (131 072 addresses (/15 prefix))
  • 107.106.0.0/15 (131 072 addresses (/15 prefix))
  • 107.90.0.0/15 (131 072 addresses (/15 prefix))
  • 107.84.0.0/15 (131 072 addresses (/15 prefix))
  • 155.166.0.0/16 (65 536 addresses (/16 prefix))
  • 12.72.0.0/16 (65 536 addresses (/16 prefix))
  • 108.146.0.0/16 (65 536 addresses (/16 prefix))
  • 166.217.0.0/16 (65 536 addresses (/16 prefix))
  • 107.241.0.0/16 (65 536 addresses (/16 prefix))
  • 166.195.0.0/16 (65 536 addresses (/16 prefix))
  • 166.220.0.0/16 (65 536 addresses (/16 prefix))
  • 155.163.0.0/16 (65 536 addresses (/16 prefix))
  • 166.183.0.0/16 (65 536 addresses (/16 prefix))
  • 166.175.0.0/16 (65 536 addresses (/16 prefix))
  • 107.89.0.0/16 (65 536 addresses (/16 prefix))
  • 107.118.0.0/16 (65 536 addresses (/16 prefix))
  • 107.233.0.0/16 (65 536 addresses (/16 prefix))
  • 155.170.0.0/16 (65 536 addresses (/16 prefix))
  • 107.125.128.0/17 (32 768 addresses (/17 prefix))
  • 107.127.128.0/17 (32 768 addresses (/17 prefix))
  • 107.87.0.0/17 (32 768 addresses (/17 prefix))
  • 107.126.128.0/17 (32 768 addresses (/17 prefix))
  • 107.92.0.0/17 (32 768 addresses (/17 prefix))
  • 108.144.128.0/17 (32 768 addresses (/17 prefix))
  • 166.193.0.0/17 (32 768 addresses (/17 prefix))
  • 107.93.0.0/17 (32 768 addresses (/17 prefix))
  • 166.204.0.0/17 (32 768 addresses (/17 prefix))
  • 12.73.0.0/17 (32 768 addresses (/17 prefix))
  • 166.216.0.0/17 (32 768 addresses (/17 prefix))
  • 107.87.192.0/18 (16 384 addresses (/18 prefix))
  • 107.93.128.0/18 (16 384 addresses (/18 prefix))
  • 107.92.192.0/18 (16 384 addresses (/18 prefix))
  • 199.176.64.0/18 (16 384 addresses (/18 prefix))
  • 166.138.192.0/18 (16 384 addresses (/18 prefix))
  • 166.147.64.0/18 (16 384 addresses (/18 prefix))
  • 70.144.0.0/18 (16 384 addresses (/18 prefix))
  • 166.138.160.0/19 (8 192 addresses (/19 prefix))
  • 198.228.192.0/19 (8 192 addresses (/19 prefix))
  • 107.77.64.0/19 (8 192 addresses (/19 prefix))
  • 198.228.0.0/19 (8 192 addresses (/19 prefix))

IPv6 Prefixes (161 total)

  • 2600:380:2000::/35
  • 2600:380:4000::/35
  • 2600:380:7000::/36
  • 2600:380::/36
  • 2600:380:b000::/36
  • 2600:380:1000::/37
  • 2600:380:9800::/37
  • 2600:380:6000::/37
  • 2600:380:c000::/37
  • 2600:380:a000::/37
  • 2600:381::/38
  • 2600:380:6c00::/38
  • 2600:380:8400::/38
  • 2600:380:1800::/38
  • 2600:380:8a00::/39
  • 2600:380:8c00::/39
  • 2600:380:fe00::/39
  • 2600:380:9000::/39
  • 2600:380:6a00::/39
  • 2600:380:9400::/39
  • 2600:380:8000::/40
  • 2600:380:8800::/40
  • 2600:380:9200::/40
  • 2600:380:6900::/40
  • 2600:380:8e00::/40
  • 2600:380:6800::/41
  • 2600:380:f1c0::/42
  • 2600:380:f100::/44
  • 2600:387::/45
  • 2600:387:8::/46