Regular Expressions 101

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Community Patterns

35

IP Address validator

ECMAScript (JavaScript)
Validates IPv4 IP Address
Submitted by krzysp - 10 years ago
9

IPv4 Validator

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 5 years ago (Last modified 2 years ago)
15

IPv4

PCRE (PHP <7.3)
no description available
Submitted by robwa - 10 years ago
5

ipv6

PCRE (PHP <7.3)
Match an ipv6 address
Submitted by Frusty - 9 years ago
3

URL with matching categories

PCRE (PHP <7.3)
Finds the protocol, subdomain, ((domain, extension)/ipaddress), port, filepath (split in path and filename), the route and the query string.
Submitted by fps - 11 years ago
3

regex101: RFC1918 Private IPv4 Addresses, but limited to matching /24 subnet host IDs

PCRE2 (PHP >=7.3)
POSIX ERE compatible, suitable for usage in Bash [ testing Attributions Derived from [regex101: RFC1918 - Private IPv4 addresses by 0100101101001.
Submitted by anonymous - 2 years ago
4

vowel words

ECMAScript (JavaScript)
(!-\~][aeiou)
Submitted by Ipsita Mohanty - 10 years ago
5

ipv6 Validation

PCRE (PHP <7.3)
Handle all condition for ipv6 example: 1) FE80::8329 2) FE80::FFFF:8329 3) FE80::B3FF:FFFF:8329 4) FE80::0202:B3FF:FFFF:8329...
Submitted by Lim Yew Teck, Nicholas - 10 years ago
4

IPV4 address validation using recursion

PCRE (PHP <7.3)
Validate IPv4 addresses using PCRE's recursion patterns. A shorter but less efficient alternative to https://regex101.com/r/wZ6oY5/1
Submitted by Captain Haddock - 10 years ago
3

Match a valid IPv4 or IPv6 address

PCRE (PHP <7.3)
This regular expression will match an IPv4 address as well as both compressed or uncompressed IPv6 address.
Submitted by Tom Groeneveld, SevOne.com - 9 years ago
3

IPv4 validation

ECMAScript (JavaScript)
validate an IP v4
Submitted by harimambura - 9 years ago
2

Parse "ipconfig /all" output and grab all MAC Adresses

PCRE (PHP <7.3)
Parse "ipconfig /all" output and grab all MAc Adresses.
Submitted by j0inty - 10 years ago
2

IPv4 strict

PCRE (PHP <7.3)
Valid: 000.01.249.255 1.199.200.0 0.0.0.0 Invalid:...
Submitted by MaxusR - 10 years ago
2

IPv6 detection

Python
It's too large to match with all which seems like an IPv6. It's not perfect, but it's detects more valid IPv6 than some others regex.
Submitted by Ajabep - 9 years ago
2

Find IP

PCRE (PHP <7.3)
Regex to match an IPv4 address at beginning
Submitted by edoz90 - 9 years ago
2

IP Address

PCRE (PHP <7.3)
IPv4 Address Input
Submitted by anonymous - 9 years ago
2

IPv4 dotted decimal

ECMAScript (JavaScript)
This regexp was written for Regex Tuesday Challenge - Week Six.
Submitted by anonymous - 9 years ago
2

IPv4 with an undefined amount of 0 before every number

PCRE (PHP <7.3)
This regex matches every IPv4 address with or without 0s before every number. For example: 192.168.1.1 00000000000192.168.00000000000001.01
Submitted by anonymous - 5 years ago
2

IpAddress

Python
Ensure the ip address format is correct
Submitted by aaa - 5 years ago
2

RFC1918 - Private IPv4 addresses

PCRE2 (PHP >=7.3)
Validate a given IP v4 address against all three defined Private IPv4 Subnets as statet in RFC1918 10.0.0.0/8 172.16.0.0/20 192.168.0.0/16 ...
Submitted by 0100101101001 - 4 years ago
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