AS20057 AT&T Mobility LLC
cellular · based in United States · IPLogs default verdict: Mobile / cellular
- ASN
- AS20057
- Name
- AT&T Mobility LLC
- Category
- cellular
- Country
- United States
- IPLogs verdict
- Mobile / cellular
- Proxy backbone
- No
About AT&T Mobility LLC
AT&T Mobility US mobile carrier.
How IPLogs classifies AS20057
When the detection engine sees an IP that routes through AS20057, it checks three lists: (1) the curated VPN-provider ASN list, (2) the datacenter / hosting ASN list, and (3) the trusted CDN allowlist. Matches produce one of vpn_asn, dc_ip, or no flag respectively. Keywords in the org name (e.g. "vpn", "proxy", "anonym") may also trigger vpn_org_keyword even for unknown ASNs.
Use the ASN as a shortcut when you want to block a whole hosting provider at the edge rather than maintaining a per-IP list.
Authoritative sources for AS20057
Third-party registries where you can verify the announcements, peer relationships, and WHOIS registration for this ASN.
Related ASNs
Other cellular ASNs in United States catalogued by IPLogs.
Frequently asked questions about AS20057
+Is AS20057 (AT&T Mobility LLC) a VPN, datacenter, or residential network?
IPLogs classifies AT&T Mobility LLC (AS20057) as a mobile / cellular carrier network based in United States. The default verdict for any IP that routes through this ASN is "Mobile / cellular".
+Who operates AS20057 and where is it registered?
AT&T Mobility LLC (AS20057) operates in United States.
+How do I check or block AS20057 traffic?
Send any suspect IP to the IPLogs API — POST https://iplogs.com/v1/check with body {"ip":"<ip>"} — and the response reports the originating ASN plus whether it matched the VPN, datacenter, or CDN lists. To block a whole hosting network at the edge, filter on AS20057 instead of maintaining a per-IP list. Copy-paste recipes for Cloudflare WAF, Nginx, and Stripe Radar are at /guides/block-vpn-traffic.