Unregistered with IANA; no well-known protocol claims it.
There is no IANA assignment for 7106 in either transport — the closest entries are 7107 (reserved on TCP, AES-X170 on UDP). Nmap lists it as "unknown" with an open-frequency of 0.000380, low but not zero, which is what you would expect from assorted in-house and vendor services picking a free number. No documented software defaults to it.
Expose with care
Unknown port, unknown service: enumerate the process and its authentication before deciding what may reach it.
$ sudo lsof -nP -iTCP:7106 -sTCP:LISTENSeen this on your network? Beige Box scans your Wi-Fi and shows every open port on every device — and its Ports tool links straight back here.
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Corrections or a missing port? Reply @rimrocksystems.