The Db name mentioned above were just examples. The actual db names are in tns file below. The details as as below:

LSNRCTL> status
Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
STATUS of the LISTENER
------------------------
Alias LISTENER_GISDEV
Version TNSLSNR for 64-bit Windows: Version 11.2.0.1.0 - Production
Start Date 20-JAN-2011 10:16:27
Uptime 4 days 5 hr. 5 min. 37 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File C:\ORA\dbadmin\product\11.2.0\GISDEV\NETWORK\ADMIN\listener.ora
Listener Log File c:\ora\dbadmin\diag\tnslsnr\PDFPGISORDEV\listener_gisdev\alert\log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=PDFPGISORDEV.PADOTGIS.state.pa.us)(PORT=1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROC1521ipc)))
Services Summary...
Service "CLRExtProc" has 1 instance(s).
Instance "CLRExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "giszgg" has 1 instance(s).
Instance "gisdev", status READY, has 2 handler(s) for this service...
Service "orad2" has 1 instance(s).
Instance "orad2", status BLOCKED, has 1 handler(s) for this service...
The command completed successfully


===============================================================================
TNSNAMES.ORA

ORAD2 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 164.156.155.129)(PORT = 1521))
(CONNECT_DATA =
(SERVER = SHARED)
(SERVICE_NAME = orad2)
)
)


giszgg =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 164.156.155.134)(PORT = 1521))
(CONNECT_DATA =
(SERVER = SHARED)
(SERVICE_NAME = giszgg)
)
)

gisdev =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 164.156.155.134)(PORT = 1521))
(CONNECT_DATA =
(SERVER = SHARED)
(SERVICE_NAME = gisdev)
)
)


Thanks...