4-1-1

411
4-1-1 is the telephone number for local directory assistance in the United States and Canada.wikipedia
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Directory assistance

directory enquiries118 5001-800-555-1212
4-1-1 is the telephone number for local directory assistance in the United States and Canada.
In the North American Numbering Plan (covering Canada and the United States), directory assistance may be contacted by dialing 4-1-1 (one of the N11 codes).

1-800-FREE-411

Since the 1984 Bell System divestiture, the RBOCs in the United States have priced 4-1-1 use higher to an average of $1.25 USD per call, compared to $0.50 CAD in most of Canada, providing opportunities for competing services in the United States, such as ad-sponsored 1-800-FREE-411.
4-1-1

GOOG-411

GOOG-411
It was an alternative to 4-1-1, an often-expensive service provided by local and long-distance phone companies, and was therefore commonly known as Google 411.

Tellme Networks

TellMeMicrosoft TellMeVoice of Tellme
Tellme Networks
Some of the services running on Tellme's network include directory assistance (4-1-1) for AT&T and Verizon (landline), AT&T's Voice Dial (*08), customer service for Merrill Lynch, E*TRADE Financial, and American Airlines, and e-commerce services for Fandango.

Telephone

phonetelephonesLocal Telephone Service
4-1-1 is the telephone number for local directory assistance in the United States and Canada.

United States

American🇺🇸U.S.
4-1-1 is the telephone number for local directory assistance in the United States and Canada.

Canada

🇨🇦CanadianCAN
4-1-1 is the telephone number for local directory assistance in the United States and Canada.

New York City

New YorkNew York, New YorkNew York City, New York
4-1-1 has been used since at least 1930 in New York City, San Francisco, and other large cities where panel and crossbar switching equipment installed by the Bell System was prevalent.

San Francisco

San Francisco, CaliforniaSan Francisco, CACity and County of San Francisco
4-1-1 has been used since at least 1930 in New York City, San Francisco, and other large cities where panel and crossbar switching equipment installed by the Bell System was prevalent.

Number One Crossbar Switching System

1XBNo. 1 Crossbar1XB switch
4-1-1 has been used since at least 1930 in New York City, San Francisco, and other large cities where panel and crossbar switching equipment installed by the Bell System was prevalent.

Telephone exchange

exchangescentral officeexchange
4-1-1 has been used since at least 1930 in New York City, San Francisco, and other large cities where panel and crossbar switching equipment installed by the Bell System was prevalent.

Bell System

BellBell Operating CompaniesBell Telephone
4-1-1 has been used since at least 1930 in New York City, San Francisco, and other large cities where panel and crossbar switching equipment installed by the Bell System was prevalent.

GTE

General TelephoneGeneral Telephone and ElectronicsGTE Corporation
However, in smaller Bell System cities and almost all areas served by GTE and other companies where step-by-step equipment was the norm such as Los Angeles, 1-1-3 was used until at least the 1960s, and in some cases (the Pacific Northwest, for example) until the mid-1980s.

Strowger switch

Strowgerstep-by-stepstep by step
However, in smaller Bell System cities and almost all areas served by GTE and other companies where step-by-step equipment was the norm such as Los Angeles, 1-1-3 was used until at least the 1960s, and in some cases (the Pacific Northwest, for example) until the mid-1980s.

Los Angeles

Los Angeles, CaliforniaLos Angeles, CALA
However, in smaller Bell System cities and almost all areas served by GTE and other companies where step-by-step equipment was the norm such as Los Angeles, 1-1-3 was used until at least the 1960s, and in some cases (the Pacific Northwest, for example) until the mid-1980s.

Long-distance calling

long distancelong-distancelong distance call
When long-distance numbers were needed, prior to the full introduction of direct-dialed long-distance service, callers would call either 4-1-1 or "0" (Operator) and request a free long-distance connection to the directory assistance center in the distant city.

Telephone numbering plan

Area codeCalling codearea codes
The number in cities with panel and crossbar switching equipment was area code-555-1212, whereas in cities with step-by-step equipment the number was 1-555-1212 (or 112-555-1212) for numbers not local but in the same area code and 1-area code-555-1212 (or 112-area code-555-1212) for numbers in other area codes. For regulatory reasons, where telephone service is provided by traditional local-exchange carriers, the local carrier will determine how to handle 411, the chosen local toll (intra-LATA) carrier will determine how to handle 555-1212 calls for area codes within the LATA, and the chosen long distance carrier for inter-LATA) calls will determine how to handle other area code-555-1212 calls.

Competitive local exchange carrier

CLECcompeting carrierCompetitive Local Exchange Carriers
After the introduction of local exchange competition, most telephone companies outsourced directory assistance service to nationwide call centers.

Modification of Final Judgment

MFJ(MFJ)a divestiture agreement
For regulatory reasons, where telephone service is provided by traditional local-exchange carriers, the local carrier will determine how to handle 411, the chosen local toll (intra-LATA) carrier will determine how to handle 555-1212 calls for area codes within the LATA, and the chosen long distance carrier for inter-LATA) calls will determine how to handle other area code-555-1212 calls.

Local exchange carrier

Local Exchange NetworkLEClocal
For regulatory reasons, where telephone service is provided by traditional local-exchange carriers, the local carrier will determine how to handle 411, the chosen local toll (intra-LATA) carrier will determine how to handle 555-1212 calls for area codes within the LATA, and the chosen long distance carrier for inter-LATA) calls will determine how to handle other area code-555-1212 calls.

Local access and transport area

LATALATA codeLATAs
For regulatory reasons, where telephone service is provided by traditional local-exchange carriers, the local carrier will determine how to handle 411, the chosen local toll (intra-LATA) carrier will determine how to handle 555-1212 calls for area codes within the LATA, and the chosen long distance carrier for inter-LATA) calls will determine how to handle other area code-555-1212 calls.

Interexchange carrier

long-distance carrierlong distance carrierIXC
For regulatory reasons, where telephone service is provided by traditional local-exchange carriers, the local carrier will determine how to handle 411, the chosen local toll (intra-LATA) carrier will determine how to handle 555-1212 calls for area codes within the LATA, and the chosen long distance carrier for inter-LATA) calls will determine how to handle other area code-555-1212 calls.

Voice over IP

VoIPvoice over Internet Protocolvoice-over-IP
For service provided by cellular and VoIP carriers where the customer does not have a choice of local toll or long distance carriers, all calls may be handled the same way.

Vertical service code

calling featureservice featureCLASS
In North America, all areas formerly using 1-1-3 have been converted to using 4-1-1, and 1-1- is now reserved for vertical service codes.