
514 Networking Explained, Second Edition
different European countries such as France (+33), Greece (+30), Germany
(+49), Ireland (+353), and Iceland (+354). Note that these respective country
codes all have a leading digit of +3 or +4. The remaining digit or digits of the
country code refer to the national identifier, which specifies the country itself.
Further note that the United States and Canada do not have a country distinction
(i.e., a national identifier). These countries only use the +1 zone code and hence,
don’t have a “real” country code. This is because they follow the North Ameri-
can Numbering Plan (NANP), which was in place before international ...