Find IP address of Print Server

I was at a client site who has two Print servers installed for two printers as follows:

(1). HP LaserJet 2100 >> D-link DP-101P+
(2). Epson LQ-2180 >> D-Link DP-301P+

Due to various changes that had been made on the server and network, the IP addresses for the two print servers have been changed from the default which according to the documentation is 192.168.0.10 to something else. This being the case I need to know if there is a way to find out what the IP addresses are so I can get to them via the web interface or telnet and set configuration.

Thanks
RB