Check the status of SCAN Listener with the SRVCTL command

#srvctl status scan
  
SCAN VIP scan1 is enabled
SCAN VIP scan1 is running on node myrac2
SCAN VIP scan2 is enabled
SCAN VIP scan2 is running on node myrac1
SCAN VIP scan3 is enabled
SCAN VIP scan3 is running on node myrac1

Check listener online on which node:

$ srvctl status scan_listener

SCAN Listener LISTENER_SCAN1 is enabled
SCAN listener LISTENER_SCAN1 is running on node myrac2
SCAN Listener LISTENER_SCAN2 is enabled
SCAN listener LISTENER_SCAN2 is running on node myrac1
SCAN Listener LISTENER_SCAN3 is enabled
SCAN listener LISTENER_SCAN3 is running on node myrac1 

Verify the listener LISTENER_SCAN1 is running on a node by using lsnrctl status also:

$ lsnrctl status listener_scan2

Verify the location it has two files on Grid Home:

$GRID_HOME/network/admin> ls
listener.ora
endpoints_listener.ora