List of IP Addresses to whitelist?

0 Votes

The `redirectURI` in my OAuth request is blocked. Is there a list of Constant Contact IP Addresses I could whitelist specific to this request?

0 Votes

Hello Trek10,


Thank you for reaching out to Constant Contact API Developer Support. My team is here to assist outside software developers with questions about building into Constant Contact's API.


It looks like we reached out to you via email regarding this issue to request some additional information in order to better assist with troubleshooting. If you still need assistance with this, please let us know! If you haven't received our reply, please let us know via email at, and reference case number 31052428.


For a full list of Constant Contact’s IP addresses and URLs, I am also including a detailed support article below.


Safelist Constant Contact web domains in a security program:

Please have a look and let us know if you have any other questions!



John B.
API Support Specialist
Did I answer your question? If so, please mark my post as an "Accepted Solution" by clicking the Accept as Solution button in the bottom right hand corner of this post.
Developer Portal

View API documentation, code samples, get your API key.

Visit Page


API Updates

Join our list to be notified of new features and updates to our V3 API.

Sign Up