RegExLib.com - The first Regular Expression Library on the Web!

RegExp for validating the format of IP Addresses. This works great with the ASP.NET RegularExpressionValidator server control.

Matches e-mail addresses, including some of the newer top-level-domain extensions, such as info, museum, name, etc. Also allows for emails tied directly to IP addresses.

This matches an IP address, putting each number in its own group that can be retrieved by number. If you do not care about capturing the numbers, then you can make this shorter by putting everything after ^ until immediately after the first \. in a group ( ) with a {3} after it. Then put the number matching regex in once more. It only permits numbers in the range 0-255.

Matches comma-separated list of IP address and IP ranges. E.g. 192.168.101.1-192.168.101.255,192.168.102.12

Matches simple IP addresses. It's not too complex or long, but it does the job if you want something short/simple.

Email address validator. Should cover most of RFC 822, including unusual (but still valid) addresses. Does not restrict the top level domain size, but you're better off doing an nslookup or similar if you absolutely must have a valid domain. Accepts IP Addresses instead of the domain, with or without brackets. Believe it or not, this one is valid: !#$%^&*-+~/'`|{}@xyz.com Sorry looks like this site is mangling the quote and ampersand characters - you'll have to fix that yourself.

matches IP address in hex form in dotted or not dotted notation

Very Simple Match for dotted Decimal IP address. Doesn’t Validate addresses

Regular expression for validating a decimal IP address. Matches 4 groups of from 1 to 3 digits, where each group of digits ranges from 0 to 255 in value. Groups of digits must be separated by a single period (.) with no other formatting characters present. Uses conditional regex with lookahead syntax to prevent a match on a period following the final group of digits.

Simple URL Validator -- allows http, https, ftp, ftps, 2-6 letter TLD, ports, any path. Sorry, no IP addresses. Not too fussy, but then, it's not too long either ;-)

Hopefully an all-encompassing expression to validate a URL. Supports an optional protocol, either a domain or IP address, an optional port number and an optional path.

Attempt to validate email addresses. Does not support name <[email protected]> format or ip addresses

Regex to match valid folder paths. can be local, UNC with server name, or UNC with IP address

Matches a URL string by: protocol,subdomain,domain,ip address,port number,path and/or filename

Accurate IP address verification... Each numeric part of an IP address must be between 0 and 255. All patterns I have seen on the net cover this range but they allow leading zeros. The valid cases are: * 0 * 1, 10-19 and 100-199 aka 1[0-9]{0,2} * 2 and 20-29 aka 2[0-9]? * 200-249 aka 2[0-4][0-9] * 250-255 aka 25[0-5] * 3-9 and 30-99 aka [3-9][0-9]?

This will match any valid RFC2822 e-mail address typed into web forms. If does not support comments, display name, or line folding. It does support quoted-strings in the local-part and domains by the RFC 1035 and proper ip addresses. It does relax the RFC1035 rule of not allowing numbers as the first character of a domain name (since they do exist in real life)

Regex for IP Address validation.

Validates an RFC 2822 email address, except does not allow most punctuation and non-ascii alphanumeric characters. Also does not take length requirements into account. Allows domain name and IP addresses, but ensures that the IP address entered is valid.

It matches an IP address only in the correct format. There was a previous regex send which matches 192.168.01.2 but this code won't match preceeding 0's

Checks email format against RFC 3696 (http://tools.ietf.org/html/rfc3696). Allows all characters described in Sections 2 and 3 of the RFC EXCEPT those described in Section 4.3 as unsafe for mailto URLs without encoding. Allows any 2-letter TLD plus any of the current gTLDs as listed at http://www.icann.org/registries/top-level-domains.htm. Does not accept quoted strings in the local part or IP addresses in lieu of the domain name. Does not enforce length limits. Intended to be used as case-insensitive. Comments are appreciated!

This Regular Expression searches for a valid eMail address. It uses a list of all the known top-level-domains to verify that the domain is correct. Also Possible to find the IP Address

i can use one regex one times, e.g. i can use regex: ip-address separatly. I can use also regex for NUMBER separatly. But how can i merge this 2 regex to one regex, that i can use my expression for numbers or for ip addresses together.

It matches private IP addresses. Private IP addresses (as defined by RFC 1918) are not routable on public Internet. This would help if you want to grant some previlege only to the users from within local network. ***Importnat*** This pattern assumes that the input is a valid IP address. You many need to make sure the input is a valid IP address.

Validates the format of a Windows folder path ending with a backslash using the drive path or Universal Naming Convention (UNC)--without using lookaround.<br><br>Windows folder components: <br>(I) The drive can only be one letter. <br>(II) The server name (1) can only contain letters, numbers, and hyphens. However, Windows does allow underscores--which aren’t standard characters in the Request for Comments (RFC) 1035 standard--for networks using the Microsoft DNS Server. (Reference: http://support.microsoft.com/default.aspx?scid=kb;en-us;222823) or (2) can be an IP address <br>(III) The share name (also called the service name) (1) Can contain any character except ones with an ASCII code in the range of 0 (x00) through 31 (x1F) and the following: " * / : ? | < > \ , ; [ ] + = (Reference: http://support.microsoft.com/default.aspx?scid=kb;en-us;236388) (2) Can begin or end with a period, but cannot contain all periods (3) Cannot begin or end with a space (4) There must be at least one character that is not a space or period if the rest of the share name contains periods and spaces or just periods. <br>(IV) The folder and subfolder names (without the drive, share, or server name) (1) Can contain any character except ones with an ASCII code in the range of 0 (x00) through 31 (x1F) and the following: " * / : ? | < > \ (Reference: http://msdn2.microsoft.com/en-us/library/aa365247.aspx) (2) Cannot begin or end with a space or period.

Quick and simple way of matching a well-formed IPV4 (dotted quad) ip address.

Email validation regular expression. It checks for TLD domain correctness and supports for IP addresses. It doesn't check for ip single parts range validity (1-255).

This expression matches IP Addresses between 192.168.0.17 - 192.168.0.32 which is a block range of 16 addresses. I created this expression for Google Analytics to filter out hits from our companies office.

The IANA resrved 24-bit block of IP address space for private internets. It's just a single class A network number. This is also RFC 1918 compliant.

This is a set of 16 contiguous class B network numbers or a 16-bit block of ip address space as reserved by the IANA. RFC 1918 compliant.

This is the 16-bit block of the IP address space for private internets reserved by the IANA. A set of 256 contiguous class C network numbers per RFC 1918.

match ip address from 1.0.0.0 to 223.255.255.255

|| Only alphanum characters accepted at the beginning of the user name and domain name || Does not allow 2+ adjacent non-alphanum characters || IP address accepted as domain || 1+ chars accepted as user name or domain

IP Address validation by Vassilis Petroulias + my subnet validation using numbers between 0 and 32

For Email Inputs checks to RFC 5322 Standards (no IP address though Didn't Want them) localhost: cannot start or end with . cannot have .. in it Domain: cannot start with - or . Known problems: [email protected] domains can be longer then 255. But each Domain can only be 63 then a . is required

Accurate IP address verification... Th fist and the fourth numeric part of an IP address must be between 1 and 255. The second and the third numeric part of an IP address must be between 0 and 255.

ip address/netmask couple

This regex expression validates IP addresses when processed as a string.

This matches any valid IPV4 IP Address. It includes 0-255 range checks since none of the IP components may exceed 255.

Validates subnet specified by CIDR notation. A valid CIDR notation begins with the IP address followed by a '/' character and a decimal number specifying the length, in bits, of the subnet mask or routing prefix (number from 0 to 32).

Validates IP addresses and subnet masks

validates private ip addresses needs to be a bit more refined

I think this is the ultimate url match expression to every possible url pattern including named or ip address domain PS: you have got to try RegexBuddy it's a very cool tool that helps realy http://www.regexbuddy.com

accepts - Domain name - or ip address

I think this is the ultimate url match expression to every possible url pattern including named or ip address domain PS: you have got to try RegexBuddy it's a very cool tool that helps realy http://www.regexbuddy.com

This regular expression validates an IP address within the range of 1.0.0.0 to 255.255.255.255

This is a standard perl-compatible regexp for ip4 address validation

Matches ip addresses. Takes into account trailing left zeros.

Matches email addresses. Based on expression at regular-expressions.info/email.html modified to include all top-level domains (TLD)listed on wikipedia as of June 2010. Needs to be updated as new TLDs are added. Known Issues: * IP Addresses will not validate * Double "at" symbols, e.g. email@[email protected] slip by this regex. Would welcome improvements by a regex ninja.

Email validation intended for javascript: use of lookahead ('.' not followed by '@') instead of lookbehind ('@' not preceded by '.'). It doesn't allow ip addresses.

Check for IP address

This could be most complete and readable URL-finder regex. I built it from several good examples. Works with PHP preg_match_all(). Finds whatever string that resembles a URL with scheme://, user:password, subdomains.domain (with up to 6 chars top-domain) or IP address xxx.xxx.xxx.xxx, :port, /file/path/, ?request, and #anchor

matches nothing unfortunately

This expression is ideal used for "identifying some plain application configuration files that contain any form of ip addresses, with or without port number followed and with protocol at the beginning". [\\""=/] can be removed on both ends to seach IPs in text files, but with it, it has better accuracy - there are version numbers in the application configuration files. It also does not match IPs that have one digit at the first number.

Match all IP addresses other than 127.0.0.1. It dose not match an IP has 0 at the last number

The following is a powerful regular expression for e-mail address's validation. It was wrote respecting the e-mail addresses' syntax reported in the RFCs and supports both hostnames with multiple sub domains and IP addresses.

v allow Symbol [(_) (-) (DOT)] (number) (a-z and caps), X disallow symbol&number at begining (avoid bad sorting database, including bad subdomain name (1.example.com) & fake email) and ending (before "@") & other symbols are disallowed; username min,max/maxout = 2, 25/27 --- must exist "@" ---; after "@" : FOR DOMAIN NAME : v Symbol [(_) (-) (DOT)] (number) (a-z and caps), X symbol at begining and ending (including before top level domain extension) v a-z (with/out caps) total min=2 max 4 in top level domain extension NOT SUPPORTED PORT NUMBER, if you the administrator ? self edit the database, DONT give user a chance for adding port number. maximum 25 address length ; OR standard IP ADDRESS. WHITE SPACE IS NOT SUPPORTED.

To check a valid IP Address. It will check the valid IP address on the logic of three dots max three digits in each section

all ip address should be accepted within this range 0-255

Validation IP Address Version 4

Comma seperated multiple ip address

Validates an IP Address. I use it in perl.

IP address IPv4 (127.0.0.1) . From http://tools.twainscanning.com/getmyregex .