Unregistered, unnamed, and listed by Nmap on both TCP and UDP.
52848 has no IANA registration because it falls in the Dynamic/Private range that RFC 6335 excludes from assignment. Nmap's nmap-services carries two rows for it — TCP at 0.000228 and UDP at 0.000502 — meaning Nmap's scan corpus found it open more often over UDP than TCP, though neither figure is large. No named service or malware is documented for it in the SANS ISC port database. Anything found listening here is an application that chose the number, not a standard.
Expose with care
Unknown service, unknown authentication. Do not forward it through a firewall until you know what binds it.
$ nmap -Pn -sV --version-all -p 52848 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.