How to extract your outside IP address-without a chicken or a monkey

Home > Blogs > Cisco > How to extract your outside IP address-without a chicken or a monkey

How to extract your outside IP address-without a chicken or a monkey

Like This Blog 1Mark Jacob
Added by May 15, 2017

Frequently I find myself asking students in my Network+ or Cisco CCNA classes to divulge their favorite resource to use when they want to determine their external (publicly accessible) IP address.

Here are some of the more popular answers: whatismyip.com

Or ipchicken.com.

Or perhaps even better, the ipmonkey.com:

I did not include the actual IP address that I obtained when I was writing this blog, not because it is some big secret, but because I suggest to readers to run the same tests themselves and compare output.  “Compare to what?” you ask.  Well what if I want to know my external IP address, but I want the results from a command prompt?  There is a way, so let’s see it in action.

This method uses the command prompt, but there is a way to do this in PowerShell as well.  I am not the originator of these methods, but I find them useful enough that I want to throw my voice into the mix and announce them to others who may find them useful also.

You may also like:  How to Paste Text Into a Linux Terminal Window

The command uses nslookup in non-interactive mode and looks like this:

nslookup myip.opendns.com resolver1.opendns.com

 See figure 4 to see the results:

 

 Hey!  That is the same address I found using the aforementioned web resources, but I did not have to launch a browser to get it!  Now you  can use that information as input in other scripted activities!

I did mention that it can also be done in PowerShell, so I will include that here, although I am not a guru on that topic (always willing to learn more…).

The command and output is

(Invoke-WebRequest -URI (“ifconfig.me/ip”)).Content

and is shown in figure 5:

 

Be aware that it could take up to a minute before the above command generates output, but it does work.  Hope you find this to be a useful tidbit!

Until next time….

Mark Jacob
Cisco and CompTIA Network + Instructor – Interface Technical Training
Phoenix, AZ

Videos You May Like

Agile Methodology in Project Management

0 13 0

In this video, you will gain an understanding of Agile and Scrum Master Certification terminologies and concepts to help you make better decisions in your Project Management capabilities. Whether you’re a developer looking to obtain an Agile or Scrum Master Certification, or you’re a Project Manager/Product Owner who is attempting to get your product or … Continue reading Agile Methodology in Project Management

Subnetting a TCP/IP Network using the Magic Box Method

0 29 0

In this session, we are going to look at how to subnet a Class B address into multiple network segments using what's called The Magic Box. Let's run through this real quick.

Detailed Forensic Investigation of Malware Infections – April 21, 2015

1 37 1

In this IT Security training video, Security expert Mike Danseglio (CISSP / CEH) will perform several malware investigations including rootkits, botnets, viruses, and browser toolbars.

Write a Comment

See what people are saying...

  1. Richard Andersson

    I often use https://whatsmyip.com since I by misstake missed the i in the name and now thats where I always land since its the first choice in browser history.

    Works good though, and contains whois history also 🙂

Share your thoughts...

Please fill out the comment form below to post a reply.