TELECOM Digest OnLine - Sorted: Oakland Calif Conversion From 6 to 7 Digit Dialing?

Oakland Calif Conversion From 6 to 7 Digit Dialing?

hancock4@bbs.cpcn.com
27 Sep 2005 09:40:30 -0700

In reading a book about the Key System railway, older schedules had a
six-digit phone number (2L-4N) while newer ones had seven-digits
(2L-5N).

Would anyone know when Oakland converted?

Also, was six digit dialing (2L-4N) common in a lot of places? I
though most city dial offices were 5 digit for smaller cities and 7
digit (3L-4N) for larger cities. The seven digits were used as part
of the panel installation for cities expecting growth and to provide
for automatic integrated dialing to/from suburban areas as well.

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