MCC 310 is the Mobile Country Code assigned to United States by the International Telecommunication Union (ITU). All mobile operators in United States use this MCC combined with their unique MNC to form their PLMN identifier.

PLMN codes are used by mobile devices to identify and select networks, and by roaming agreements to route calls and data between operators globally. The 467 operators listed here represent all active MNC assignments reported by United States's telecommunications authority to the ITU.

Data is updated within hours of each ITU Operational Bulletin release. Search the full global database or explore our interactive map.