If I check with google, I can see my public IP. Is there something on the Ubuntu command-line which will yield me the same answer?

  • 2
    "having dynamic IP", "SSH using some other system across the internet", "the command which will display the present PUBLIC IP". You see the chicken/egg problem here? How would you be able to run commands on a remote server without knowing its address? You might be more interested in services like no-ip.com / DynDNS.org. – gertvdijk Jan 9 '13 at 13:11
  • one cannot SSH without knowing the public IP my friend... dynDNS costs a lot and no-ip tough works but the situation don't allow that... anyway the question has been already answered.. thanks for your suggestion – BhaveshDiwan Jan 10 '13 at 8:46
  • 1
    PS duckduckgo.com/?q=ip (no command line, but no big brother G neither) – Campa Jan 28 '15 at 7:28
  • 1
    Maybe this should be a separate question, but I would like to see an alert when my public IP address changes. For now, I'm just using the following answers in a crontab with notify-send. – PJ Brunet Dec 2 '16 at 19:36
  • great solutions below. For Centos use: ifconfig eth1 | sed -nre '/^[^ ]+/{N;s/^([^ ]+).*inet *([^ ]+).*/\2/p}' where eth1 is the network device o interest, you can omit the 'et1' string to show all ips of all adapters. Instead of \2 you can write \1 \2 to show the names of each adapter too. – Hafenkranich Oct 27 '18 at 12:28

22 Answers 22


If you are not behind a router, you can find it out using ifconfig.

If you are behind a router, then your computer will not know about the public IP address as the router does a network address translation. You could ask some website what your public IP address is using curl or wget and extract the information you need from it:

curl -s https://checkip.dyndns.org | sed -e 's/.*Current IP Address: //' -e 's/<.*$//'  

or shorter

curl https://ipinfo.io/ip
  • 28
    ty - right after I posted, I realized that I didn't google for an answer first: looks like this will work curl -s checkip.dyndns.org|sed -e 's/.*Current IP Address: //' -e 's/<.*$//' Other possibilities are listed here: go2linux.org/what-is-my-public-ip-address-with-linux – kfmfe04 Jan 16 '12 at 12:01
  • 1
    sure - you can add it to your answer – kfmfe04 Jan 16 '12 at 13:18
  • 1
    To clarify: That was a hack, and a very ugly one at that, so I did an edit to make it simpler and something that people can remember. – jrg Jan 16 '12 at 16:17
  • 2
    Exacly as Giovanni P stated. The OP should change the accepted anwser. – loostro Apr 11 '14 at 21:45
  • 41
    curl -s ipinfo.io/ip – chao Oct 7 '15 at 20:38

For finding the external ip, you can either use external web-based services, or use system based methods. The easier one is to use the external service, also the ifconfig based solutions will work in your system only if you're not behind a NAT. the two methods has been discussed below in detail.

Finding external IP using external services

The easiest way is to use an external service via a commandline browser or download tool. Since wget is available by default in Ubuntu, we can use that.
To find your ip, use-

$ wget -qO- https://ipecho.net/plain ; echo


You could also use lynx(browser) or curl in place of wget with minor variations to the above command, to find your external ip.

Using curl to find the ip:

$ curl https://ipecho.net/plain

For a better formatted output use:

$ curl https://ipecho.net/plain ; echo

A faster (arguably the fastest) method using dig with OpenDNS as resolver:

The other answers here all go over HTTP to a remote server. Some of them require parsing of the output, or rely on the User-Agent header to make the server respond in plain text. They also change quite frequently (go down, change their name, put up ads, might change output format etc.).

  1. The DNS response protocol is standardised (the format will stay compatible).
  2. Historically DNS services (OpenDNS, Google Public DNS, ..) tend to survive much longer and are more stable, scalable and generally looked after than whatever new hip whatismyip.com HTTP service is hot today.
  3. (for those geeks that care about micro-optimisation), this method should be inherently faster (be it only by a few micro seconds).

Using dig with OpenDNS as resolver:

$ dig +short myip.opendns.com @resolver1.opendns.com


Copied from: https://unix.stackexchange.com/a/81699/14497

Finding external IP without relying on external services

  • If you know your network interface name

Type the following in your terminal:

$ LANG=c ifconfig <interface_name> | grep "inet addr" | awk -F: '{print $2}' | awk '{print $1}'

In the above, replace <interface_name> with the name of your actual interface, e.g: eth0, eth1, pp0, etc...

Example Usage:

$ LANG=c ifconfig ppp0 | grep "inet addr" | awk -F: '{print $2}' | awk '{print $1}'
  • If you don't know your network interface name

Type the following in your terminal (this gets the name and ip address of every network interface in your system):

$ LANG=c ifconfig | grep -B1 "inet addr" |awk '{ if ( $1 == "inet" ) { print $2 } else if ( $2 == "Link" ) { printf "%s:" ,$1 } }' |awk -F: '{ print $1 ": " $3 }'

Example Usage:

$ LANG=c ifconfig | grep -B1 "inet addr" |awk '{ if ( $1 == "inet" ) { print $2 } else if ( $2 == "Link" ) { printf "%s:" ,$1 } }' |awk -F: '{ print $1 ": " $3 }'
ppp0: 111.222.333.444

N.B: Outputs are indicative and not real.

Courtesy: https://www.if-not-true-then-false.com/2010/linux-get-ip-address/


  1. LANG=c has been added to ifconfig based usages, so that it always gives the english output, irrespective of locale setting.
  • 1
    @Z9iT, Sure.. It should work in any linux distribution provided that you have wget installed. As said if you have either curl or lynx already available please use that instead. You would need root permission to install so use sudo apt-get install wget – saji89 Jun 1 '12 at 12:19
  • 14
    The commands with ifconfig do only work, if you are not behind a NAT. – lukassteiner Jan 23 '13 at 15:52
  • 2
    just use -w curl option instead of echo :) curl -w '\n' ident.me – drAlberT Jun 11 '14 at 8:17
  • 3
    This proposal using dig is pretty nice unix.stackexchange.com/questions/22615/… – binaryanomaly Mar 14 '15 at 15:31
  • 4
    The last version without external services only works, if your computer is connected directly to the internet which is rarely the case, otherwise you only get your local IP address. – rubo77 Oct 5 '15 at 2:42

My favorite has always been :

curl ifconfig.me

simple, easy to type.

You will have to install curl first ;)

If ifconfig.me is down try icanhazip.com and or ipecho.net

curl icanhazip.com


curl ipecho.net
  • 3
    @Z9iT, I just checked this now. Yes, it would output the external ip in your terminal. – saji89 Jun 1 '12 at 13:13
  • 7
    The response time from ifconfig.me seems quite a bit slower than ipecho.net. – Drew Noakes Oct 25 '13 at 14:57
  • 3
    If you don't have curl but have wget: wget -U curl -qO- ifconfig.me – Stéphane Chazelas Aug 14 '14 at 20:16
  • 2
    ifconfig.me does not seem to be responding :( – Asfand Qazi Jan 20 '16 at 11:51
  • 1
    @AsfandYarQazi - working here. You can try one of the alternates , icanhazip.com – Panther Jan 20 '16 at 12:48

icanhazip.com is my favorite.

curl icanhazip.com

You can request IPv4 explicitly:

curl ipv4.icanhazip.com

If you don't have curl you can use wget instead:

wget -qO- icanhazip.com
  • Thanks! I had to try many suggested above until I found some that is IPv6-capable. It's a shame that such services are usually still IPv4-only. – Vladimír Čunát Feb 24 '19 at 17:20

I've found everything to be annoying and slow, so I wrote my own. It's simple and fast.

Its API is on http://api.ident.me/


curl ident.me
curl v4.ident.me
curl v6.ident.me
  • 1
    Woah, that was really fast! – waldyrious Dec 7 '13 at 4:19
  • 1
    I find the icanhazip.com solution faster and it includes a newline in the output. – Tyler Collier Aug 19 '14 at 0:00
  • 1
    Yes, it was indeed faster lately. Just tweaked my solution. – Pierre Carrier Sep 9 '14 at 13:53
  • 2
    Kudos! 2 years and you are still maintaining it. Well done. "IDENTify ME", is what comes to my mind, when I need ip check :) – Mohnish Sep 28 '15 at 1:37
  • 2
    aws is faster time curl http://checkip.amazonaws.com -> 0.91s vs .241s for ident.me Let's just pray aws doesnt go down ;) – Avindra Goolcharan Apr 12 '18 at 1:41

You could use a DNS request instead of HTTP request to find out your public IP:

$ dig +short myip.opendns.com @resolver1.opendns.com

It uses resolver1.opendns.com dns server to resolve the magical myip.opendns.com hostname to your ip address.

  • 3
    This is really fast. I did one warmup execution, then 10 executions each of this and curl icanhazip.com. Average for the curl version: 174ms. Average for the DNS-only version: 9ms. ~19x faster. See also: unix.stackexchange.com/a/81699/8383 – Adam Monsen Mar 10 '15 at 21:06
  • 1
    @AdamMonsen Thank you for the link. The point of using DNS (as the answer that you've linked says) is that the response is standard (and unlikely to change) and the service (OpenDNS) might stick around longer than most of its http alternatives. The time it takes to make the request might be shadowed by the command start up time. – jfs Mar 11 '15 at 0:40
  • Yep. I wouldn't be surprised if curl itself is slower than dig. Even if they were rewritten to be as similar as possible, curl would still be slower; it uses HTTP (including DNS) and dig only uses DNS. – Adam Monsen Mar 11 '15 at 4:16

Amazon AWS

curl https://checkip.amazonaws.com

Sample output:

Also works on browser: http://checkip.amazonaws.com

I like it because:

  • it returns just the plaintext IP in the reply body, nothing else
  • it is from a well known provider which is unlikely to go offline anytime soon
  • 1
    Was looking for solution with some known name, thank you – Manohar Reddy Poreddy Nov 10 '19 at 2:41

The one i'm using is :

wget -O - -q icanhazip.com

Yes, you can have ip :-)

  • 3
    I prefer curl icanhazip.com sometimes wget is the only one available, but sometimes no wget is available as well and curl is your only option (like OS/X). Either way curl icanhazip.com is almost as easy as curl ifconfig.me but much funnier ;-) – TryTryAgain Aug 25 '12 at 20:38

Type in this exactly, press Enter where indicated:

telnet ipecho.net 80Enter
GET /plain HTTP/1.1Enter
HOST: ipecho.net Enter
BROWSER: web-kitEnter

This manually submits a HTTP request, which will return your IP at the bottom of a HTTP/1.1 200 OK reply

Example output:

$ telnet ipecho.net 80
Connected to ipecho.net.
Escape character is '^]'.
GET /plain HTTP/1.1
HOST: ipecho.net
BROWSER: web-kit

HTTP/1.1 200 OK
Date: Tue, 02 Jul 2013 07:11:42 GMT
Server: Apache
Expires: Mon, 26 Jul 1997 05:00:00 GMT
Cache-Control: no-cache
Pragma: no-cache
Vary: Accept-Encoding
Transfer-Encoding: chunked
Content-Type: text/html

  • 6
    Nice, this worked well, not having to install curl was an advantage for me: one liner: printf "GET /plain HTTP/1.1\nHOST: ipecho.net\nBROWSER: web-kit\n\n" | nc ipecho.net 80 – Ozone Mar 19 '14 at 5:32

For this, STUN was invented. As a client you can send a request to a publicly available STUN server and have it give back the IP address it sees. Sort of the low level whatismyip.com as it uses no HTTP and no smartly crafted DNS servers but the blazingly fast STUN protocol.

Using stunclient

If you have stunclient installed (apt-get install stuntman-client on debian/ubuntu) you can simply do:

$stunclient stun.services.mozilla.com
Binding test: success
Local address: A.B.C.D:42541
Mapped address: W.X.Y.Z:42541

where A.B.C.D is the IP address of your machine on the local net and W.X.Y.Z is the IP address servers like websites see from the outside (and the one you are looking for). Using sed you can reduce the output above to only an IP address:

stunclient stun.services.mozilla.com |
    sed -n -e "s/^Mapped address: \(.*\):.*$/\1/p"

However, your question was how to find it using the command line, which might exclude using a STUN client. So I wonder...

Using bash

A STUN request can be handcrafted, sent to an external STUN server using netcat and be post-processed using dd, hexdump and sed like so:

$echo -en '\x00\x01\x00\x08\xc0\x0c\xee\x42\x7c\x20\x25\xa3\x3f\x0f\xa1\x7f\xfd\x7f\x00\x00\x00\x03\x00\x04\x00\x00\x00\x00' |
    nc -u -w 2 stun.services.mozilla.com 3478 |
    dd bs=1 count=4 skip=28 2>/dev/null |
    hexdump -e '1/1 "%u."' |
    sed 's/\.$/\n/'

The echo defines a binary STUN request (0x0001 indicates Binding Request) having length 8 (0x0008) with cookie 0xc00cee and some pasted stuff from wireshark. Only the four bytes representing the external IP are taken from the answer, cleaned and printed.

Working, but not recommended for production use :-)

P.S. Many STUN servers are available as it is a core technology for SIP and WebRTC. Using one from Mozilla should be safe privacy-wise but you could also use another: STUN server list

  • +1 for the geekiest and actually most apropos technology. The http query works, which is what I've been using all my life, but I like that there's actually been some thought put into the question. I didn't know this. Thanks! – Mike S Oct 18 '16 at 17:47
  • stunclient stun.stunprotocol.org – HappyFace Feb 25 at 21:47
  • brew install stuntman – HappyFace Feb 25 at 21:47

Another fast one (might well be the fastest, relatively)

curl ipecho.net/plain

I have a stupid service for this by telnet. Something like this:

telnet myip.gelma.net

Your IPv4: xxx.xxx.xxx.xxx
Your IPv6: ::ffff:xxxx:xxxx

Feel free to use it.

  • It prints: Trying 2600:3c03::f03c:91ff:fe96:cc28... and telnet: Unable to connect to remote host: Network is unreachable – WinEunuuchs2Unix Jul 23 at 17:56

You can read a web page using only bash, without curl, wget:

$ exec 3<> /dev/tcp/icanhazip.com/80 && # open connection
  echo 'GET /' >&3 &&                   # send http 0.9 request
  read -u 3 && echo $REPLY &&           # read response
  exec 3>&-                             # close fd
  • This combined with checkip.amazonaws.com is the fastest for me – Avindra Goolcharan Apr 12 '18 at 1:44
  • 1
    @AvindraGoolcharan try a dns request – jfs Apr 12 '18 at 6:56

These will get the local IPs:


or for shorter output:

ifconfig | grep inet


ip addr show

and probably:

hostname -I

This should get the external IP

wget http://smart-ip.net/myip -O - -q ; echo

N.B. If you don't mind to installing curl, this as well:

curl http://smart-ip.net/myip
  • 1
    ifconfig | sed -nre '/^[^ ]+/{N;s/^([^ ]+).*addr: *([^ ]+).*/\1,\2/p}' will print the local interfaces and corresponding V4 IP's – Hannu Jun 27 '14 at 18:09
  • 1
    ifconfig | sed -nre '/^[^ ]+/{N;N;s/^([^ ]+).*addr: *([^ ]+).*addr: *([^ ]+).*/\1,\2,\3/p}' - v4 and v6 IPs. – Hannu Jun 27 '14 at 18:15

For those of us with login access to our routers, using a script to ask the router what its' WAN IP address is is the most efficient way to determine the external IP address. For instance the following python script prints out the external IP for my Medialink MWN-WAPR300N router:

import urllib, urllib2, cookielib
import re
from subprocess import check_output as co

cookie_jar = cookielib.CookieJar()
opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cookie_jar))

def get(url, values=None):
  data = None
  if values: data = urllib.urlencode(values)
  req = urllib2.Request(url, data)
  rsp = urllib2.urlopen(req)
  return rsp.read()

router = co(['ip', '-o', 'ro', 'list', '']).split()[2]
url = "http://" + router

get(url+"/LoginCheck", dict(checkEn='0', Username='admin', Password='admin'))
page = get(url+"/system_status.asp")

for line in page.split("\n"):
  if line.startswith("wanIP = "):
    print line.split('"')[1]

Note that this is not very secure (as is the case with plaintext credentials & logging in to most routers), and is certainly not portable (needs to be changed for each router). It is however very fast and a perfectly reasonable solution on a physically secure home network.

To customize the script for another router, I recommend using the tamperdata addon in firefox to determine what HTTP requests to make.

  • 2
    You should try getting the IP address of the router grammatically. For example router = subprocess.check_output(['ip', '-o', 'ro', 'list', '']).split()[2]. – Cristian Ciupitu Jun 2 '14 at 2:26

Many home routers can be queried by UPnP:

curl "http://fritz.box:49000/igdupnp/control/WANIPConn1" -H "Content-Type: text/xml; charset="utf-8"" -H "SoapAction:urn:schemas-upnp-org:service:WANIPConnection:1#GetExternalIPAddress" -d "<?xml version='1.0' encoding='utf-8'?> <s:Envelope s:encodingStyle='http://schemas.xmlsoap.org/soap/encoding/' xmlns:s='http://schemas.xmlsoap.org/soap/envelope/'> <s:Body> <u:GetExternalIPAddress xmlns:u='urn:schemas-upnp-org:service:WANIPConnection:1' /> </s:Body> </s:Envelope>" -s

Then, grep the ip address from the answer.

grep -Eo '\<[[:digit:]]{1,3}(\.[[:digit:]]{1,3}){3}\>'

If you are using DD-WRT then this works for me:

curl -s | grep "ipinfo" | awk -v FS="(IP: |</span)" '{print $2}'


curl -s -u your_ddwrt_username:your_ddwrt_password | grep "ipinfo" | awk -v FS="(IP: |</span)" '{print $2}'
  • Where is the Gateway/Router LAN IP Address of the DD-WRT router.

  • The -s component means silent (i.e. don't show the curl progress information).

  • Oh, I should mention that I use the above with "DD-WRT v24-sp2 (01/04/15) std".

If you have installed lynx in Ubuntu type

lynx bot.whatismyipaddress.com
  • curl bot.whatismyipaddress.com works too. – Tomofumi Jan 30 '15 at 8:26

Maybe I am a little late, but inxi can do it fairly easy.

Install inxi

sudo apt install inxi

Then run the following command

inxi -i

Example with my information blocked out using the z option for copy and paste to sites like this:

~$ inxi -iz
Network:   Card: NVIDIA MCP77 Ethernet driver: forcedeth
           IF: eth0 state: up speed: 1000 Mbps duplex: full mac: <filter>
           WAN IP: <filter>
           IF: eth0 ip-v4: <filter> ip-v6-link: N/A

Where it says <filter> is where your WAN IP, IPv4, MAC address etc will appear

  • Although not the fastest, it is the prettiest with color output. – WinEunuuchs2Unix Jul 23 at 18:01

use ip!

ip addr show

then look for the relevant adapter (not lo, and usually eth0), and locate the ip address near inet.

  • 3
    The question is about public not internal IP addresses – Wolf Oct 22 '16 at 20:24

Simply issue a traceroute for any website or service..

sudo traceroute -I google.com

Line 2 always seems to be my public IP address after it gets past my router gateway.

user@user-PC ~ $ sudo traceroute -I google.com
traceroute to google.com (, 30 hops max, 60 byte packets
 1 (  230.739 ms  231.416 ms  237.819 ms
 2 (  249.136 ms  250.754 ms  253.994 ms**

So, make a bash command.

sudo traceroute -I google.com | awk -F '[ ]' '{ if ( $2 ="2" ) { print $5 } }'

And the output...


I don't think relying on PHP scripts and the sort is good practice.

  • this is interesting, though really slow and doesn't get my external ip like this – rubo77 Oct 5 '15 at 2:46
  • 1
    This answer is too inaccurate to be useful. In my corporate environment I don't get my IP address at all. The only way it works is if you understand how your local routers and switches are crafted, and even then it may not be on line 2 depending on the number of local hops you jump through. There's no way to make a coherent algorithm out of this technique, and there are many other solutions here that are simpler and will get you the proper answer every time. – Mike S Oct 18 '16 at 17:52
  • While it may work in some special configurations, I have actually never seen my external IP in a traceroute. It is usually either my gateway (if I am not behind NAT), or my router's gateway, but mostly some other router further away. – mivk Feb 14 '17 at 11:52
  • alias ip='lynx --dump ipecho.net/plain' – phildobbin Sep 14 '17 at 17:26

A command with no dependencies except being a GOogle DNS:

echo $(ip route get | awk '{print $NF; exit}')
  • This only tells you the IP-address of your local outgoing interface. – guntbert Sep 17 '15 at 16:15
  • the command does show the public ip address if I run it on a cloud server. wasn;t that the question? – Rolf Sep 17 '15 at 20:48
  • No, where do you see "cloud server"? – guntbert Sep 17 '15 at 20:52

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