You can configure incoming calls settings in.
You can use special characters to match extensions. The most useful are:
. (period): will match one or more characters X: will match only one character
You can find more details about pattern matching in Asterisk (hence in XiVO) on the Asterisk wiki.
DID will not be validated against context ranges if pattern matching is used. Patterns are entered and displayed without the “_” prefix in the web interface.