Tata Teleservices Ltd,/GSM Bihar is a mobile network operator in India assigned PLMN code 405-027 by the national telecommunications authority.

The MCC 405 identifies India, while MNC 027 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 India operators .