Domain Name Regex Pattern. A regex pattern matches a target string. So for using Regular Expression we have to use re library in Python.
Create a regular expression to check the valid domain name as mentioned below. Internet domain names also end in a set of IANA-issued top-level domains which are subject to the same rules as labels except that none is shorter than 2 characters and that not a single one has an underscore in it. By default this regexp uses a pragmatic combination of rfc1035 and rfc2181.
The following table describes most common regex.
RE dns domain Matches a DNS domain name. This topic explains the use of regular expressions for pattern matching in NPS in Windows Server. Any URL can be processed and parsed using Regular Expression. Name of the domain.