Hong Kong Telecommunications (HKT) Limited (commonly known as CSL) is a mobile network operator in Hong Kong, China assigned PLMN code 454-20 by the national telecommunications authority.

The MCC 454 identifies Hong Kong, China, while MNC 20 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 Hong Kong, China operators .