We are creating Messenger Bot! Live Application for Windows Live Messenger and we provide SMS Notification for our users. (Like: "firstname.lastname@example.org want to talk with you...." If you go away from computer MessBot send this message to you.)
So, We add several PhoneCodes for sending SMS but we do not know what is other Country's code.
In Turkey "Avea and Vodafone" supported operators. So, Avea and Vodefone provide this codes "506, 505, 555, 556 etc..."
[Country Code] [Operator Code] [Phone Digits]
Example: +90 506 1234567
If you provide your operator code, l will add this to our program. And users select "Operator Code" from list and enter their numbers. (O course users must be select their country for operator code)