CountryByCC() looks for the longest country code match from the startof an international phone number, e.g.

CountryByMCC() looks for a country description using the 3-digit MCCthat any IMSI starts with, e.g.

todo: load from remote source - not rely on file system.

-- bits 4321: numbering plan indicator -- 0000 unknown -- 0001 ISDN/Telephony Numbering Plan (Rec CCITT E.164) -- 0010 spare -- 0011 data numbering plan (CCITT Rec X.121) -- 0100 telex numbering plan (CCITT Rec F.69) -- 0101 spare -- 0110 land mobile numbering plan (CCITT Rec E.212) -- 0111 spare -- 1000 national numbering plan -- 1001 private numbering plan -- 1111 reserved for extension -- all other values are reserved.