M4 Regexp Examples

Regexp is used to allow/deny CallerID/Destinations for Origination Points, Termination Points and Dial Peers.

Regexp	Explanation
.*	everything
^[0-9]+$	only digits
^[0-9]{9,}$	only digits, number more than 8 digits (9, 10, 11...)
^[0-9]{0,9}$	only digits, number less than 9 digits (1, 2, 3, 4, 5, 6, 7, 8)
^\+?[0-9]+$	optional + sign and only digits
^370[0-9]+$	only digits starting with 370
^370.*$	anything starting with 370
^(37[0-1])|(44)[0-9]*$	only digits starting with 370 or 371 or 44
97|68|98))|(998[0-9])*$	only digits starting with 380(67,97,68,98) and 998(0-9), where 380(67,97,68,98) = 38067,38097,38068,38098 and 998(0-9) = 9980,...,9988,9989.
97|68|98)){17}|(998[0-9]){16}$	only digits starting with 380(67,97,68,98) and 998(0-9), but digits number after each prefix should be exactly 12.

See also

• Standard: http://en.wikipedia.org/wiki/Regular_expression#POSIX_basic_and_extended
• Check your regexp: http://regex101.com/