If you do zerotier-cli info -j you will see something like

   "secondaryPort": 42955,
   "surfaceAddresses": [
    "192.168.82.207/9993",
    "192.168.82.207/58922",
    "192.168.82.207/51910",
   ],
   "listeningOn": [
    "192.168.82.207/9993",
    "192.168.82.207/58922",
    "192.168.82.207/51910",
    ]

The secondaryPort should match one of the ports in listeningOn/surfaceAddresses

On 1.10.6. I've looked at mac and linux.

on mac:
sudo lsof -aP -iUDP -iTCP -p $(cat /Library/Application\ Support/ZeroTier/One/zerotier-one.pid)
I don't see "42955"