TSTT Mobile (commonly known as TSTT) is a mobile network operator in Trinidad and Tobago assigned PLMN code 374-12 by the national telecommunications authority.

The MCC 374 identifies Trinidad and Tobago, while MNC 12 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 Trinidad and Tobago operators .