MCC-MNC codes

MCC (Mobile country code) - mobile country code in which operator operates.
MNC (Mobile network code) - mobile operator code.

After these codes are combined together, we get a full E.212 code or MCC-MNC code.

For example, MCC code 255 has been assigned to Ukraine.
MNC code 01 has been assigned to mobile operator Kyivstar.
Therefore, E.212 code (MCC-MNC code) for Kyivstar subscribers would be 25501.

MCC-MNC codes are used for Billing and Routing, because more than 50% mobile subscribers all over the world use feature Number portability, and E.164 telephony number no longer identifies operator, to which subscriber is connected.

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