Autonomous system
AS20057
ATT-MOBILITY-LLC-AS20057 - AT&T Enterprises, LLC, US
Mobile carrier
A mobile carrier network. Addresses here are shared through carrier-grade NAT across large numbers of subscribers, so they identify a region rather than a person.
ASN
AS20057
Operator
ATT-MOBILITY-LLC-AS20057 - AT&T Enterprises, LLC, US
Registry country
🇺🇸 United States
Registry
ARIN
Allocated
2001-03-20
Classification
Mobile carrier
Advertisement
Resolved live from the Team Cymru ASN mapping service over DNS-over-HTTPS at request time, so the operator name and allocation reflect current registry data. Classification is ours, derived from a curated table checked against the RIPE NCC asnames registry.