Sure South Atlantic Ltd. (Ascension) (commonly known as Sure) is a mobile network operator in Saint Helena, Ascension and Tristan da Cunha assigned PLMN code 658-01 by the national telecommunications authority.

The MCC 658 identifies Saint Helena, Ascension and Tristan da Cunha, 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 Saint Helena, Ascension and Tristan da Cunha operators .