The start of IANA's unassigned 7512-7541 block, just above HP OpenView's 7510.
IANA registers 7510 (ovhpas, HP OpenView Application Server) and 7511 (pafec-lm), then leaves everything from 7512 to 7541 unassigned. Nmap carries no name for 7512 and scores it at about 0.03% of open TCP ports. Nothing standard listens here; on a host running old HP management software the neighbouring ports are worth checking, but 7512 itself has no defined role.
Expose with care
No registration means no assumptions — resolve the process and rate that, rather than the port number.
$ nmap -Pn -sV -p 7512 TARGETSeen 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.