Why can't I intercept messages starting with 00?

00 is the area code. It's definitely useless to write 00 as setting the mask number. The number behind is the real number, and you can set to intercept all strange information. Short message is text or digital information sent or received directly by users through mobile phones or other telecommunication terminals. The number of characters that users can send and receive SMS at a time is 160 English or numeric characters or 70 Chinese characters.