BelCel Joint Venture (JV) (commonly known as DIALLOG) is a mobile network operator in Belarus assigned PLMN code 257-03 by the national telecommunications authority.

The MCC 257 identifies Belarus, 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 Belarus operators .