Speaking of the ZEnith numbers, I remember up until the early 1980's in CA, to reach CHP you dialed the operator and asked to be connected to ZEnith-1200.
The remainder of this issue of the Digest are some articles from our
> archives, dealing with telephone exchange names. Most articles are
> twenty years old, dating from 1986. An article by Mark Cuccia dates
> back to 1996. I hope you will enjoy re-reading them and needless
> to say _do not_ use any of these old email addresses given.
> PAT
> How about the non-exchange, non-dialable, ZEnith X-XXXX numbers?.
> These were pre 800 800 numbers. "Call you local operator and ask for
> ZEnithX-XXXX, no cost to calling party".
> Huh? There is no "Z" on the dial.
> [TELECOM Digest Editor's Note: (in 2006) ... Zenith and Enterprise
> numbers only had four digits, _never_ five; they were never
> dialable and today have been largely replaced by 800, 888, 877 and
> 866 numbers which _are_ dialable. Pat]