Inside IANA's 8045-8050 Unassigned block, with no known standard occupant.
IANA lists 8045 through 8050 as Unassigned, and Nmap files 8045 as unknown. The registered ports on either side belong to FireScope (8042-8044) and Rocrail (8051), neither of which spills into this gap. Anything listening on 8045 is an application-specific choice, most often one more HTTP port on a busy host.
Expose with care
Judge the listener, not the number — an unregistered port gives you no protocol to reason about.
$ nmap -sV -Pn -p 8045 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.