The most reliable printer IP address is the one shown on the printer's own current network report. Windows may also show a port address, but it can be stale.
Read the current address
Use the model's Network Status or Connection Report menu. Look for an IPv4 or IPv6 address on the same trusted LAN as the computer. Do not post a full report publicly; it may contain network identifiers.
Compare Windows' saved port
Open Printers & scanners, select the printer, then inspect Printer properties and its Ports tab where available. A saved WSD entry may not show a straightforward IP. Avoid changing a working port merely because its label looks unfamiliar.
Interpret a mismatch
If the printer report and a Windows TCP/IP port show different addresses, check the router lease and reconnect the correct device. A ping response is only a supporting clue because some printers block ICMP.
Official references
Useful next steps
Found a mismatch? Request a correction with the public source URL and exact model, without passwords or full serial numbers.