Here are some excerpts from a song recorded by Allan Sherman, co-written with Lou Busch:

It's the "The Let's All Call Up AT&T And Protest To The President March."
Can you see him smirking and smiling?
'Cause he's got us all digit dialing...

Let us wake him up in his slumber.
Get a pencil, I'll give you his number.

It's 3 1 8 5 2 7 3
0 8 7 4 2 9 dash!
5 1 1 4 9 0 6 7
4 0 8 5 2 hyphen!
1 1 4 6 2 0 5
7 9 hyphen dash 0 3...

More complete lyrics of unevaluated authenticity can be found on various places around the web.