Mass Response Service GmbH (commonly known as spusu) is a mobile network operator in United Kingdom assigned PLMN code 234-40 by the national telecommunications authority.

The MCC 234 identifies United Kingdom, while MNC 40 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 United Kingdom operators .