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Editorial Team
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Asked: 2026-06-14T09:49:52+00:00

I am trying to use regex for the IP address from an HTML page:

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I am trying to use regex for the IP address from an HTML page:

<html>
  <head><title>Current IP Check</title></head>
  <body>Current IP Address: xx.xxx.xxx.xx</body>
</html>

And my VB.Net code is currently this:

Using wClient As New WebClient
   ip = wClient.DownloadString("http://checkip.dyndns.org/")
   ip = Regex.Match(ip, "^[+-]?(\d+(\.\d+)?|\.\d+)$", RegexOptions.Singleline).ToString
End Using

However, the end results are nothing for IP.

I’m just looking to get xx.xxx.xxx.xx

What would I be doing incorrectly?

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1 Answer

  1. Editorial Team

    Regular expression for an IP address is much more complex than you outlined. But there is no reason to re-invent the wheel. Please have a look at Regular Expression Examples, here is the one that accounts for everything:

    \b(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\b
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