Please enable JavaScript to use regex101
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Reg
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Ex
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101
Reg
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Ex
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101
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Regular Expression
r"
(?:^|\b(?<!\.))(?:1?\d?\d|2[0-4]\d|25[0-5])(?:\.(?:1?\d?\d|2[0-4]\d|25[0-5])){3}(?=$|[^\w.])
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gm
Input 1
1
New
My input string & constraints are as follows : IPv4 Range : 0.0.0.0 to 255.255.255.255 55.123.99.988 256.1.1.1 IPv4 address may / may not be present in the string Valid Examples : this is an ip & this is an ip 200.100.2.32 String may start with IPv4 address Valid Examples : 200.100.2.32 is an ip | Output : ['200.100.2.32'] Invalid Examples : 200.100.2.32is an ip | Output : [] String may end with IPv4 address Valid Examples : the ip is 200.100.2.32 Output : ['200.100.2.32'] Invalid Examples : the ip is200.100.2.32 Output : [] String may contain an IPv4 address in the middle, and if it does - there will a space before and after the IPv4 address. Valid Examples : the ip is 200.100.2.32 and it is ipv4 | Output : ['200.100.2.32'] Valid Examples : the ip is 200.100.2.32and it is ipv4 | Output : [] Multiple IPs may be present in a single string Valid Examples : 200.100.2.32 100.50.1.16 | Output : ['200.100.2.32', '100.50.1.16'] Invalid Examples : 200.100.2.32.100.50.1.16 | Output : []
Extraction