CBVTAG.BAD

800-              <-* Free number? (optional)    note the "-" after the #'s
900-              <-* Pay by minute number       note the "-" after the #'s
000-              <- I think not
-0000             <- no such animal
-000              <- again, no way Jose
-411              <- directory assistance       note the "-" before the #'s
-911              <- Emergency number           note the "-" before the #'s
XXX-555-1212      <- Number in ALL area codes not to call must be "XXX" not xxx