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IPv4 address string, controlled by a regular expression.
Address is to be specified in dotted-quad decimal notation in accordance with RFC791, without leading 0s.
IPv4 address within range [1-126,128-223].[0-255].[0-255].[0-255], 7-15 characters.
Valid characters: 0123456789.
Regex:
(^((22[0-3]|2[01][0-9]|1[013456789][0-9]|12[012345689]|[1-9][0-9]|[1-9])\.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[0-9])\.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[0-9])\.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[0-9]))$)
Examples: 1.1.1.1, 1.1.255.255
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