Db2's conventional instance port — widely used, but by convention only, since IANA cannot assign in this range.
50000 is in the Dynamic/Private range and has no IANA assignment; IANA's registered ibm-db2 name belongs to port 523, not here. In practice 50000 is the default TCP service port configured for a Db2 LUW instance, which is why Db2 containers and installers publish it and why Nmap's service list labels it ibm-db2. It is also a common human-chosen port for application servers and proxies simply because it is a round number at the start of the range, so an open 50000 needs fingerprinting rather than assumption.
Do not expose
If it is Db2, it is a database listener with the whole dataset behind it — bind it to a private network and reach it over a VPN or tunnel.
$ nmap -Pn -sV -p 50000 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.