Dialable entities one-liner

With this one-liner you get all the "dialable entities" of your dialplan:

asterisk -rx "dialplan show" | cut -d' ' -f3 |  grep '^..' | grep -o '[0-9]*' | uniq

EXPLANATION:

asterisk -rx "dialplan show" --> Asterisk CLI command that shows the loaded dialplan

| cut -d' ' -f3 --> shows only the third field of each line (with whitespace as the delimiter)

| grep '^..' --> removes empty lines

| grep -o '[0-9]*' --> filters out anything non-numeric

| uniq --> removes duplicates