Regular Expressions 101

An IPv4 expression that doesn't allow leading zeros in octets. 10.0.0.1 will pass 10.0.0.01 shouldn't pass

IPv4 matching pattern. Excludes values over 255 or numbers with zero-prefix (e.g. 08)

This regular expression strictly matches an IPv4 address. Leading 0 are not matched , take a look at test strings and try your own ones.

Blocks IPs that are sent in discord. Will block any IP, even if the numbers aren't in valid ranges (like 327.19.8.79) Has basic protections against whitespace

Near-optimal solution for Task 7 https://regex101.com/quiz/7. Optimal is 39 characters. Credit to Danail Gabenski on stackoverflow for the \.\b trick.

Simple Regex to *validate * (no extraction!) an IPv4 Range which can be a comma separated mixture of IPv4 addresses IPv4 CIDRs IPv4 Ranges like 1.1.1.1-1.1.1.10 Examples : 192.168.1.1,255.255.255.255/32,10.10.10.10/24,0.0.0.0/24 192.168.1.1/32 192.168.1.1 192.168.1.1/32 192.168.1.1/12 192.168.1.1/24 192.168.1.1/24 192.168.1.1/0,192.168.1.1/0 10.0.0.0/24 172.16.0.1-172.16.0.255 192.168.1.1,10.0.0.1/24,172.16.0.1-172.16.0.10 64.33.232.212 64.33.232.210/24

Validate an IPv4 address. The addresses are four numbered separated by three dots, and can only have a maximum value of 255 in either octet. Start by trying to validate 172.16.254.1.

(?(?:(?:250-5]|(?:2[0-4]|1\d|[1-9]|)\d)\.?\b){4}) Originating from ^((25[0-5]|(2[0-4]|1\d|[1-9]|)\d)\.?\b){4}$ at only 43 chars Source: [Danail Gabenski

Given a string, the regex would match if it is a valid IPv4 address.

Movin4Life.org

wttmforums.com

for JS regular expression to validate any http|https|ftp|IPv4 address, supported: authority username:password (example https://username:password@example.com); port :0-65565 (example https://example.com:80); query/queries ?c=1 or ?c=1&d=x (example https://example.com/main.php?c=1&d=x); fragment #name (example https://example.com/main.php#top); WaybackMachine URLs contains *;

This regex can be used to validate IPv4 and IPv6 addresses as well as CIDR ranges

Match only Private IPv4 Does not match Public IPv4 and test Nets

Match only Public IPv4 Does not match Private IPv4 and test Nets

Match only Public IPv4 Does not match Private IPv4 However does match test Nets

Matches any valid IPv4 address with, optionally, a CIDR suffix. 0.0.0.0 to 255.255.255.255 and 1.1.1.1/0 to 1.1.1.1/32. Use the following regex if you don't want to allow the CIDR suffix. /^(?:(?:1-9]?[0-9]|1[0-9|2(?:0-4|50-5]))\.){3}(?:[1-9]?[0-9]|1[0-9|2(?:0-4|5[0-5]))$/ (removed (?:\/(?:[12]?[0-9]|3[0-2]))? from the end)

Parse stdout from ipmitool sensor

Matches the M3U links provided by Xtream servers to stream IPTV

Regex pattern detection for IPv4 addresses and IPv6 addresses in zero compression format.