Who Assigns Phone Numbers?
North American Numbering Plan Association (NANPA) is the administrative and governing body that plans the Public Switched Telephone Network. Their service extends over 19 countries, which includes Canada, and the US and its territories. NANPA assigns 800-855 and 555 line numbers and does not allocate individual numbers, which are done by private and other service providers. The numbers are formed on the basis of the area code, which comprises the first 3 digits, followed by the exchange code, which consists of the next three digits, and then a four-digit number, which is obtained randomly.
