Ringback code? [telecom]

For many years the telco's supported a ringback code so as to test a telephone's ringer and the line. The code changed over time.

In recent years it was 113+4d (the 4 digits of the phone number). One then flashed and hung up, and the phone would ring. But that is no longer working.

Would anyone know the current ringback code?

Thanks!

P.S. Are there any other 11N codes? (ie. 112, 117, etc.?)