Reputation · trust score
A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.
- Baseline (neutral) 65
- Isp allocation +5
- Trust score 70 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
About AT&T
AT&T Inc., an abbreviation of its predecessor's original name, the American Telephone and Telegraph Company, is an American multinational telecommunications company headquartered at the Whitacre Tower in Downtown Dallas, Texas. AT&T is the world's third-largest telecommunications company by revenue, the third-largest wireless carrier in the United States behind T-Mobile and Verizon, and the nation's largest fiber internet provider.
AS20057 — global IP footprint
Cities where AS20057 has measurable IPv4 allocation. Click any dot to open that city's page. Size and color scale with IP count.
Top CIDR ranges
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS20057 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.
| Prefix | Announcement samples | Last seen |
|---|---|---|
| 166.131.140.0/23 | 11,355 | 2026-09-10 11:59:02 |
| 166.131.190.0/23 | 11,349 | 2026-09-10 11:59:02 |
| 166.219.128.0/20 | 11,229 | 2026-09-10 11:59:02 |
| 166.216.197.0/24 | 11,207 | 2026-09-10 11:59:02 |
| 107.250.16.0/21 | 11,171 | 2026-09-10 11:59:02 |
| 166.184.40.0/22 | 11,170 | 2026-09-10 11:59:02 |
| 166.170.48.0/22 | 11,146 | 2026-09-10 12:38:05 |
| 166.176.56.0/22 | 11,089 | 2026-09-10 12:38:05 |
| 135.211.237.0/24 | 10,999 | 2026-09-10 11:59:02 |
| 135.211.232.0/24 | 10,987 | 2026-09-10 11:59:02 |
| 107.127.248.0/22 | 10,942 | 2026-09-10 11:56:01 |
| 166.130.192.0/18 | 10,925 | 2026-09-10 11:59:02 |
| 166.132.0.0/14 | 10,910 | 2026-09-10 11:59:02 |
| 166.131.0.0/16 | 10,900 | 2026-09-10 11:59:02 |
| 107.84.224.0/19 | 10,844 | 2026-09-10 12:04:57 |
| 107.241.150.0/24 | 10,825 | 2026-09-10 12:38:05 |
| 209.183.48.0/22 | 10,819 | 2026-09-10 11:59:02 |
| 209.183.48.0/23 | 10,793 | 2026-09-10 11:59:02 |
| 166.216.0.0/17 | 10,768 | 2026-09-10 11:59:02 |
| 166.216.198.0/23 | 10,709 | 2026-09-10 11:59:02 |
| 166.219.0.0/16 | 10,686 | 2026-09-10 11:59:02 |
| 166.215.128.0/17 | 10,671 | 2026-09-10 11:59:02 |
| 166.218.128.0/17 | 10,663 | 2026-09-10 11:59:02 |
| 166.218.0.0/17 | 10,658 | 2026-09-10 11:59:02 |
| 166.216.200.0/24 | 10,643 | 2026-09-10 11:59:02 |
| 166.213.0.0/16 | 10,625 | 2026-09-10 11:59:02 |
| 166.215.0.0/17 | 10,592 | 2026-09-10 11:59:02 |
| 166.193.16.0/20 | 10,576 | 2026-09-10 12:04:57 |
| 166.216.192.0/23 | 10,567 | 2026-09-10 12:04:52 |
| 166.195.16.0/22 | 10,565 | 2026-09-10 12:04:57 |
| 166.172.184.0/22 | 10,472 | 2026-09-10 11:56:01 |
| 108.144.224.0/20 | 10,191 | 2026-09-10 11:59:02 |
| 107.85.196.0/23 | 10,051 | 2026-09-10 11:56:01 |
| 12.72.253.0/24 | 9,901 | 2026-09-10 11:56:01 |
| 166.203.32.0/20 | 9,853 | 2026-09-10 12:04:57 |
| 166.172.188.0/22 | 9,846 | 2026-09-10 11:56:01 |
| 135.211.206.0/24 | 9,698 | 2026-09-10 12:38:05 |
| 166.137.176.0/22 | 9,697 | 2026-09-10 12:38:05 |
| 135.211.200.0/24 | 9,694 | 2026-09-10 12:38:05 |
| 166.171.248.0/22 | 9,691 | 2026-09-10 12:38:05 |
| 107.250.24.0/21 | 9,689 | 2026-09-10 12:38:05 |
| 166.134.0.0/15 | 9,641 | 2026-09-10 12:38:05 |
| 155.163.224.0/19 | 9,620 | 2026-09-10 11:59:02 |
| 166.131.116.0/23 | 9,595 | 2026-09-10 11:56:01 |
| 155.170.0.0/17 | 9,592 | 2026-09-10 11:59:02 |
| 166.147.68.0/24 | 9,589 | 2026-09-10 11:56:01 |
| 166.131.229.0/24 | 9,579 | 2026-09-10 11:56:01 |
| 166.131.172.0/23 | 9,576 | 2026-09-10 11:56:01 |
| 166.131.110.0/24 | 9,576 | 2026-09-10 11:56:01 |
| 166.216.230.0/23 | 9,576 | 2026-09-10 12:38:05 |
Showing top 50 of 1,475 announced prefixes by sample volume.
Frequently Asked Questions
What is AS20057?
AS20057 is an Autonomous System Number assigned to AT&T Enterprises, LLC. An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).
How many IP addresses does AS20057 announce?
AS20057 announces 3.95M IPv4 addresses distributed across 167 routed CIDR prefixes. The network is registered in United States.
Who operates AS20057?
AS20057 is operated by AT&T Enterprises, LLC. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.
What country is AS20057 registered in?
AS20057 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
