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I'm writing a script that does dynamic DNS updates for me, but my server is behind a router, and so I need to use a web service to determine my public IP.

So far I've found this one which returns just your plain IP. I was looking around trying to find a couple of alternatives to use in my script supposing that that one is down, but I can't find any others that return just the IP as plaintext.

These ones return some HTML, but I really don't want to bother parsing HTML when what the script needs to do is such a simple task.

Does anyone know of some other reliable services which return only your public IP in plaintext?

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4 Answers 4

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45

Famous one – I can haz IP:

$ curl icanhazip.com
1.2.3.4

And that's it.

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4
  • True. It's actually the first one I really remember.
    – slhck
    May 5, 2012 at 16:56
  • 2
    icanhazip.com is not very reliable. Once every few times, the site doesn't answer at all.
    – Serge Wautier
    Aug 21, 2012 at 14:06
  • I have to second the unreliability of icanhazip. Some time ago the service also migrated to CloudFlare which sometimes presents a captcha.
    – Tobias Mühl
    Jun 3, 2020 at 18:32
  • Unfortunately, it doesn't provide direct IP access (for times when your DNS server is down). Other than that, a great service!
    – Shayan
    Oct 26, 2022 at 19:38
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I use http://checkip.amazonaws.com/

curl -s http://checkip.amazonaws.com/

(This form miscounts the above 82 characters as 15 characters, so I have to enter an extra sentence.)

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1
  • 2
    I had to stop using this service last week, possibly because my ISP started doing something weird. Now I use ipinfo.io/ip , which is free to use for up to 1k queries/day; see ipinfo.io/developers .
    – ShadSterling
    Jul 29, 2015 at 17:07
6

Or you could host your own. Use a free hosting company, and using PHP use a code like this:

<?php

echo $_SERVER['REMOTE_ADDR'];

?>
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  • 3
    Of course I could do that, but surely there must already be plenty of services out there which do this already.
    – Alex Coplan
    May 5, 2012 at 16:50
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    exactly what I was looking for! Maybe I don't want some one else logging my IPs or spamming some other log
    – wuxmedia
    Oct 6, 2018 at 11:30
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    'free hosting' will most likely be logging something
    – Maciek Rek
    Aug 14, 2019 at 11:42
5

see page http://wtfismyip.com, http://wtfismyip.com/text actually on. Get ip address in the form of text. XML or JSON formats too.

or get http://checkip.dyndns.com/ but format is "Current IP Address: xxx.xxx.xxx.xxx"

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1
  • Well thank F@ck for that!
    – Phill Healey
    Mar 8, 2021 at 13:03

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