Dynamic-range port, no IANA owner; usually one of a Windows host's RPC listeners.
49163 falls in the Dynamic/Private range that RFC 6335 sets aside for local use and bars from registration. On Windows it is ordinary for several RPC-backed services — Netlogon, DFS Replication, certificate services, WMI and others — to occupy scattered ports across 49152-65535, and Microsoft's own port-requirements documentation lists that whole range as the requirement rather than naming individual numbers. On a scan, an open 49163 next to open 135 is the signature of Windows RPC rather than of any particular product.
Do not expose
Microsoft documents this range as internal server-to-server traffic; exposing it publicly exposes the RPC surface behind it.
$ nmap -Pn -sV -p 135,49163 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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