For the dutch telephone numbers is a list of prefixes defined (see http://statisch.detelefoongids.nl/static/nl_NL/netnummer.html) and the place of the – and spaces is defined in a NEN description 2132.(http://taaladvies.net/taal/advies/tekst/53/)

If you also want to check for the correct prefixes in your form validation here is a sample expression that checks this all: (this doesnt backtrack the existence of first added “(” to validate “()” pair) and uses ungreedy grouping for better performance.

^\(??0(?:(?:(?:10|13|15|20|23|24|26|30|33|35|36|38|40|43|45|46|50|53|55|58|70|71|72|73|74|75|76|77|78|79)\)??\s??\-??\s??\d{3}\s??\d{2}\s??\d{2})|(?:111|113|114|115|117|118|161|162|164|165|166|167|168|172|174|180|181|182|183|184|186|187|222|223|224|226|227|228|229|251|252|255|294|297|299|313|314|315|316|317|318|320|321|341|342|343|344|345|346|347|348|411|412|413|416|418|475|478|481|485|486|487|488|492|493|495|497|499|511|512|513|514|515|516|517|518|519|521|522|523|524|525|527|528|529|541|543|544|545|546|547|548|561|562|566|570|571|572|573|575|577|578|591|592|593|594|595|596|597|598|599)\)??\s??\-??\s??\d{2}\s??\d{2}\s??\d{2})$