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The first telephone book is issued in New Haven, Connecticut21.2.1878
Content
Subscriber names are generally listed in alphabetical order, together with their postal or street address and telephone number.
In principle every subscriber in the geographical coverage area is
listed, but subscribers may request the exclusion of their number from
the directory, often for a fee; their number is then said to be
"unlisted" (American English), "ex-directory" (British English) or "private" (Australia and New Zealand).
A telephone directory may also provide instructions about how to use the telephone service in the local area, may give important numbers for emergency services, utilities, hospitals, doctors, and organizations who can provide support in times of crisis. It may also have civil defense or emergency management information. There may be transit maps, postal code guides, or stadium seating charts, as well as advertising.
In the US, under current rules and practices, mobile phone and Voice over IP
listings are not included in telephone directories. Efforts to create
cellular directories have met stiff opposition from several fronts,
including those who seek to avoid telemarketers.
