IANA-registered to Sun Cluster Manager; almost never seen on a modern scan.
IANA lists 1097 as sunclustermgr, registered for Sun Cluster Manager, the management interface that shipped with Sun's clustering products for Solaris. Nmap's service-frequency data puts it near the bottom of the range, so an open 1097 today is far more likely to be an unrelated application that picked a free port above 1024. If you find it listening, identify the process locally rather than assuming the registration is accurate.
Do not expose
The registration is a cluster administration plane; whatever is actually listening, an unidentified service on a management-range port does not belong on a public IP.
$ sudo lsof -nP -iTCP:1097 -sTCP:LISTENSeen 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.