Singtel ST GSM900 (commonly known as SingTel) is a mobile network operator in Singapore assigned PLMN code 525-01 by the national telecommunications authority.

The MCC 525 identifies Singapore, while MNC 01 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 Singapore operators .