Unified National Networks Sdn Bhd (UNN) (commonly known as UNN) is a mobile network operator in Brunei Darussalam assigned PLMN code 528-03 by the national telecommunications authority.

The MCC 528 identifies Brunei Darussalam, while MNC 03 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 Brunei Darussalam operators .