I am not much of a regex person but am looking for some help on crafting a simple regex filter that can do the following criterias: 1. The dialed number is always a 10-digits number, i.e. an area code + 7-digits number (without any leading digit(s) of +1 and/or 1). 2. If the 4-th digit of the dialed number (after the area code) is a non-zero number, do nothing. Otherwise, the regex filter will strip the leading 3 digits (area code) as well as the last 2 digits number and this will leave only 1-st 5-digits number (no area code). For instance, if the 10-digits dialed number is 0120123456, then the regex filter will return 01234. More examples followed: 10-digits input number output number --------------------- ------------- 4120123456 01234 0121234567 0121234567 1310156434 01564 8231234567 8231234567 0126543210 0126543210 Anyone? Thanks. ----- don't and stop are the ONLY two 4-letter words considered offensive to men, but not when used together. -- View this message in context: http://freeswitch-users.2379917.n2.nabble.com/Need-help-on-regex-tp5668666p5... Sent from the freeswitch-users mailing list archive at Nabble.com.