Validating DNS with Regex...

Question

I need to validate a string that should contain DNS. Which regex is appropiate?

Answer 1

Using regexlib works wonders!

http://www.regexlib.com/Search.aspx?k=dns

Answer 2

It seems someone asks this question yet, try to search before asking see this

Answer 3

This regex should work: .*DNS.*

Answer 4

(?=^.{1,254}$)(^(?:(?!\d+\.|-)[a-zA-Z0-9_\-]{1,63}(?<!-)\.?)+(?:[a-zA-Z]{2,})$)