Ever wanted to know the mobile number details-like who is the owner or from which place it has originated. Or who is the mobile service provide? Fact is that there is no mobile directory like telephone directory.Thanks to two websites which offers you this facility to ate least you know about the service provider or state or country from which call on your mobile phone came.These sites are
wikipedia page which gives you table to check initial numbers
International numbering plans - You can check the number from below.