A well-known Oracle Names server is based on the Oracle Names version 2 Dynamic Discovery Option that discovers Oracle Names servers based on a precise name:

Well-known host names for TCP connections	Well-known computer Names for Named Pipes connections	Well-known service name for an SPX connection
oranamesrvr0 oranamesrvr1 oranamesrvr2 oranamesrvr3 oranamesrvr4	ORANAMESRVR0 ORANAMESRVR1 ORANAMESRVR2 ORANAMESRVR3 ORANAMESRVR4	oranamesrvr