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A New IP Block (in case you need to whitelist it).

Written by Tomas Koprusak 65 words | 1 min read Updated Nov 13, 2025
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Starting on 2016-09-14, we are adding a new IP block to the system.

The current IP blocks are still staying active and we’ll start to send requests from this new IP block too.

Here are the details:

IP Block: 63.143.42.240/28

which means that the IPs are:

  • 63.143.42.242
  • 63.143.42.243
  • 63.143.42.244
  • 63.143.42.245
  • 63.143.42.246
  • 63.143.42.247
  • 63.143.42.248
  • 63.143.42.249
  • 63.143.42.250
  • 63.143.42.251
  • 63.143.42.252

And, the up-to-date list of the IPs can always be found in different formats at: https://uptimerobot.com/locations.

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Written by

Tomas Koprusak

Product Owner |

He has worked for Sygic as a marketer and co-led the implementation and development of a product acquired from a competitor. He has also worked as a freelance developer, helping clients from various areas. Tomas brings a wealth of industry experience to our team. He spent a few years in the blockchain industry, leading projects and marketing teams at multiple blockchain-based companies. He has presented products and managed deals in more than 10 countries around the world, managed the ICO, and built a successful marketing team at Fuergy that continues to thrive. Tomas managed a product team for the biggest job site in Slovakia, covering development and transformation to a new B2B app. Not only is Tomas skilled at web development, but he also has a deep understanding of SaaS businesses, which makes him an invaluable asset in shaping and leading various projects at UptimeRobot. His focus is always on the continual improvement of our service and user experience. In addition to his professional achievements, Tomas is a devoted father. His personal interests include cycling (he traveled around the whole country of Slovakia), playing guitar (he even played in a band), servicing bikes, music, and enjoying good beer.

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8 Comments

Stanley Sep 20, 2016 at 1:26 am

It would be nice if you notified us about this via email.

Umut Muhaddisoglu Jan 27, 2017 at 1:26 am

We've now created a newsletter for sharing such technical changes. Please make sure that you subscribe to it from the My Settings>Personal column.

Damian Yap Oct 30, 2016 at 8:30 am

This is a great free tool. User interface still a bit rough but the functionality is superb and sure beats the more expensive paid sites! Like the HipChat / Slack Integrations! Great job!

Dennis Paskorz Nov 22, 2016 at 12:50 pm

Hi, looks like media temple might be blocking some of these IPs again, we've been getting so many false positives the past few days. I saw this happened in 2014 or so. Can you contact them and get them to update their whitelist again or verify this is what's going on, please?

Umut Muhaddisoglu Jan 27, 2017 at 12:50 pm

This must be all fixed.

Carlos Nov 29, 2016 at 11:36 am

Hello,
We create the firewall rules, indicated with the above IP addresses. But the Checks did not work, could you please confirm what are the IP Uptime addresses for us to alowed?

Umut Muhaddisoglu Jan 27, 2017 at 8:04 am

Please check :https://uptimerobot.com/locations .

Adz Jan 30, 2017 at 2:13 am

What's the default port on these IPs?

Cheers.

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