Correct Format of US numbers


If you were wondering about the correct format of US numbers then this might come in handy. In short: The proper way to send CallerID number is 10 digit (from NANPA numbers), no preceding 1 or plus sign (+) as this is handled by the provider to the end user if at all. How many numbers to send? First of all, if you are sending a CLID inside the US (Home NPA Local Calls) you should not send more than 10 digits (do not include the '1') or your call might be considered "Home NPA Toll Calls" or "Foreign NPA Toll…

General 3.7 years ago 0 Answers