TELECOM Digest OnLine - Sorted: Re: Unlisted Phone Number

Re: Unlisted Phone Number
21 Mar 2007 13:11:54 -0700

On Mar 2, 1:01 pm, Patricia Pascale <> wrote:

> Patrick,

> I'm not sure if you can help me but I've not been able to find
> information on when "unlisted" phone numbers first came to use.


The New York Times reported on 6/16/1960 that they began charging for
unlisted numbers (obviously available long before that). The phone
book was thicker because many subscribers chose to be listed rather
than pay the 50c per month fee (about $5.00 in today's money).

The same article reported that Direct Distance Dialing (1+) was
available for all NYC subscribers. They could dial up to 39 states
and provinces. Obviously many areas couldn't yet receive DDD calls in

The phone co switched from a full name BUtterfield to two letters only

Also the phone co began to use two letters than had no English
equivalent, e.g. TF and LF [sic]. Even though they could've found
names for those combinations, they wanted to try the idea out.

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