Its called "asteriskcdrdb"
From the command line use
mysql -p
(enter in your database password)
MariaDB [(none)]> show databases
+--------------------+
| Database |
+--------------------+
| information_schema |
| asterisk |
| asteriskcdrdb |
| call_center |
| endpointconfig |
| meetme |
| mysql |
| performance_schema |
| roundcubedb |
+--------------------+