Explore Oracle 12c Services In RAC

To check the services via Oracle Listener

[oracle@ora12cn1 admin]$ lsnrctl status
LSNRCTL for Linux: Version 12.1.0.1.0 - Production on 21-NOV-2013 22:23:08
Copyright (c) 1991, 2013, Oracle.  All rights reserved.
Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 12.1.0.1.0 - Production
Start Date                21-NOV-2013 14:25:29
Uptime                    0 days 7 hr. 57 min. 39 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /u01/app/12.1.0/grid/network/admin/listener.ora
Listener Log File         /u01/app/oracle/diag/tnslsnr/ora12cn1/listener/alert/log.xml
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=LISTENER)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.2.101)(PORT=1521)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.2.111)(PORT=1521)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcps)(HOST=ora12cn1.localdomain)(PORT=5500))(Security=(my_wallet_directory=/u01/app/oracle/product/12.1.0/db_1/admin/ora12c/xdb_wallet))(Presentation=HTTP)(Session=RAW))
Services Summary...
Service "+ASM" has 1 instance(s).
  Instance "+ASM1", status READY, has 1 handler(s) for this service...
Service "ora12c" has 1 instance(s).
  Instance "ora12c_1", status READY, has 1 handler(s) for this service...
Service "ora12cXDB" has 1 instance(s).
  Instance "ora12c_1", status READY, has 1 handler(s) for this service...
Service "quote" has 1 instance(s).
  Instance "ora12c_1", status READY, has 1 handler(s) for this service...
The command completed successfully

Make sure that the listener is started, if not started start the listener. To view detail services use services parameter

[oracle@ora12cn1 admin]$ lsnrctl services
LSNRCTL for Linux: Version 12.1.0.1.0 - Production on 21-NOV-2013 22:24:29
Copyright (c) 1991, 2013, Oracle.  All rights reserved.
Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
Services Summary...
Service "+ASM" has 1 instance(s).
  Instance "+ASM1", status READY, has 1 handler(s) for this service...
    Handler(s):
      "DEDICATED" established:0 refused:0 state:ready
         LOCAL SERVER
Service "ora12c" has 1 instance(s).
  Instance "ora12c_1", status READY, has 1 handler(s) for this service...
    Handler(s):
      "DEDICATED" established:3 refused:0 state:ready
         LOCAL SERVER
Service "ora12cXDB" has 1 instance(s).
  Instance "ora12c_1", status READY, has 1 handler(s) for this service...
    Handler(s):
      "D000" established:0 refused:0 current:0 max:1022 state:ready
         DISPATCHER <machine: ora12cn1, pid: 3844>
         (ADDRESS=(PROTOCOL=tcp)(HOST=ora12cn1.localdomain)(PORT=21683))
Service "quote" has 1 instance(s).
  Instance "ora12c_1", status READY, has 1 handler(s) for this service...
    Handler(s):
      "DEDICATED" established:3 refused:0 state:ready
         LOCAL SERVER
The command completed successfully

To list the services automatically created for each container.

SQL> SELECT name, con_id FROM v$services;
NAME               CON_ID
-------------------- ----------
quote                       3
ora12cXDB                    1
ora12c                      1
SYS$BACKGROUND                1
SYS$USERS                    1

Note: There we will never have PDB$SEED service because, we never can connect to the PDB SEED, in this example case I only have 1 PDB namely QUOTE.

SQL> col pdb_name form a20
SQL> select pdb_id, pdb_name from cdb_pdbs;
PDB_ID     PDB_NAME
---------- --------------------
2 PDB$SEED
       3 QUOTE