Cannot get balance the of my Masternodes from explorers

[Volcomstarr]

I own 3 masternodes but I still don't understand why I cannot retreive informations about my balance using explorers. I can normally see it via SSH with the proper command but according to explorers "Address not found" is the only possible response. I can successfully inspect all my wallets but not my masternodes.

Before you ask yes, all my masternodes are active, functional and receive rewards. Am I missing something important?

Edit: I got it! Our sysadmin blocked all ports