All international calling codes connected to country / territory
Information about country and area codes taken from http://en.wikipedia.org/wiki/List_of_country_calling_codes and http://en.wikipedia.org/wiki/Telephone_numbers_in_Canada.
Information about territory codes taken from http://en.wikipedia.org/wiki/ISO_3166-1_alpha-2
SELECT territory FROM calling_codes WHERE
prefix = 1284461 OR
prefix = 128446 OR
prefix = 12844 OR
prefix = 1284 OR
prefix = 128 OR
prefix = 12 OR
prefix = 1
ORDER BY prefix DESC
LIMIT 1;
The above will return "VG" (Virgin Islands), even though the country code is US/Canada/etc
Updates and/or corrections of this data is very welcome!