AT&T FirstNet (ASM ASTCA)
United States · ISO US
Network Details
- Operator (ITU)
- AT&T FirstNet
- Brand Name
- ASM ASTCA
- Country
- United States
- ISO Code
- US
- MCC
- 313
- MNC
- 120
- PLMN
- 313-120
About PLMN 313-120
AT&T FirstNet (commonly known as ASM ASTCA) is a mobile network operator in United States assigned PLMN code 313-120 by the national telecommunications authority.
The MCC 313 identifies United States, while MNC 120 uniquely identifies this operator within the country. Together they form the PLMN (Public Land Mobile Network) identifier used by mobile devices for network selection, SIM card identification, and international roaming.
This assignment was last reported in ITU Operational Bulletin #1280 (Nov. 15, 2023). Search all MCC/MNC codes or view all United States operators .