Where is listener information stored in Database

Where is listener information stored in Database

In E-Business Suite, the information about listeners is stored in the tables

APPS.FND_TNS_LISTENERS
APPS.FND_TNS_LISTENER_PORTS

SQL> SELECT A.LISTENER_NAME,B.PORT
FROM APPS.FND_TNS_LISTENERS A, APPS.FND_TNS_LISTENER_PORTS B
WHERE A.LISTENER_GUID = B.LISTENER_GUID
/

LISTENER_NAME########## PORT
---------------------------###########-------
1 APPS_app_pr_APPS##########1626
2 db_pr_DB##################1521