Except that there are already 11-digit 020 numbers in Japan, so hopefully it'll be something like 0200..0202 11-digit and 0203..0209 14-digit. Otherwise you'd n

Except that there are already 11-digit 020 numbers in Japan, so hopefully it'll be something like 0200..0202 11-digit and 0203..0209 14-digit. Otherwise you'd need a database lookup already just for the length of the number. > For “internet of things” devices, 11-digit numbers starting with “020” have been used since January 2017.