We are writing to let you know that action may be required due to upcoming maintenance on several of Carbon's cloud-hosted software tools.
Test your system now by clicking this link: https://printer-dashboard-check.carbon3d.com
- If you see the Carbon website: no action is needed; this notice is for informational purposes only.
- If you do not see the Carbon website: action is needed to avoid a disruption to your access to Carbon's systems. Keep reading.
What's happening? Between November 15 and December 15, 2026, Carbon will update the network addresses for the following services:
What will not change:
- The web addresses you use, your logins and your bookmarks
- Your printers, installed printer software and printing behavior
Action may be required: Please verify whether your network only allows outbound traffic to specific IP addresses. We provide several test URLs which you can try to navigate to in your browser for verification:
If you see the Carbon homepage when navigating to these URLs then no further action is needed.
If you see an error message (e.g. "This site can't be reached"), this indicates that your network only allows outbound traffic to specific IP addresses. In this case, please work with your IT department to add the following addresses to your allowlist by November 15:
136.68.92.129
136.82.6.60
35.186.195.248
After adding these addresses to your allowlist, please verify using the test URLs again. If you still see an error message, please contact Carbon support (support@carbon3d.com).
NOTE: your old Carbon IP addresses should remain in your allowlist.
Questions can be directed to support@carbon3d.com.
Thank you for your continued partnership.
Best,
The Carbon Team