Directory assistance

directory enquiries118 5001-800-555-1212192 directory enquiries555-1212directory searchDQinformation operatorTelephone Directory assistanceUK directory enquiries service
In telecommunications, directory assistance or directory enquiries is a phone service used to find out a specific telephone number and/or address of a residence, business, or government entity.wikipedia
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4-1-1

411
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). The service of 4-1-1 queries is often outsourced to a call centre that specializes in that function.
4-1-1 is the telephone number for local directory assistance in the United States and Canada.

Telephone number

phone numbertelephone numbersphone numbers
In telecommunications, directory assistance or directory enquiries is a phone service used to find out a specific telephone number and/or address of a residence, business, or government entity.
The "555" prefix was reserved for telephone company use and was only consistently used for directory assistance (information), being "555-1212" for the local area.

N11 code

N-1-1N11
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).
4-1-1: Directory assistance

118 118 (UK)

118 118118118118
Four of these, 118 118 (The Number), 118 212 (Maureen), 118 247 (Yellow Pages) and 118 500 (British Telecom) are among the most expensive and yet have over 90% of the market, mostly due to heavy advertising.
118 118 is the UK telephone number for a US owned directory enquiries provider.

North American Numbering Plan

Area codeArea codesArea code(s)
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).
For example, 555-1212 is the standard number for directory assistance.

555 (telephone number)

555555 telephone number5-5-5
555 (telephone number)
555-1212 is one of the standard numbers for this purpose throughout the United States and Canada.

Telecommunication

telecommunicationscommunicationstelecom
In telecommunications, directory assistance or directory enquiries is a phone service used to find out a specific telephone number and/or address of a residence, business, or government entity.

Database

database management systemdatabasesdatabase systems
Almost all systems use custom database software to locate listings quickly.

Interactive voice response

IVRIVRSInteractive Voice Response (IVR)
Interactive voice response systems have been added to many directory assistance systems.

Speech recognition

voice recognitionautomatic speech recognitionvoice command
These complex systems use speech recognition and recorded speech or speech synthesis to handle the entire call without live operator intervention.

Speech synthesis

text-to-speechspeech synthesizertext to speech
These complex systems use speech recognition and recorded speech or speech synthesis to handle the entire call without live operator intervention.

Canada

🇨🇦CanadianCAN
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).

United States

American🇺🇸U.S.
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).

Telephone numbering plan

Area codeCalling codearea codes
To get a listing in a remote or non-local area code, directory assistance is available at 1-area code-555-1212.

Local access and transport area

LATALATA codeLATAs
1) 411 LDA: Local Directory Assistance. 411 is dialled and the operator is requested to search for a listing in a group of area codes local to the caller (LATA). Example: the caller lives in area code 630 (Oak Brook, IL) and requests a listing for a business in area code 312 (Chicago, IL). In this case, AT&T Illinois bills the call.

Illinois Bell

Illinois Bell Telephone CompanyAT&T IllinoisIllinois Bell Telephone
1) 411 LDA: Local Directory Assistance. 411 is dialled and the operator is requested to search for a listing in a group of area codes local to the caller (LATA). Example: the caller lives in area code 630 (Oak Brook, IL) and requests a listing for a business in area code 312 (Chicago, IL). In this case, AT&T Illinois bills the call.

AT&T

AT&T Inc.AT&T Latin AmericaSBC
4) 00 and ask for the international directory assistance operator. AT&T provides International Directory Assistance calls. See www.consumer.att.com/global/english/country_codes.html for additional information and country and city codes.

Toll-free telephone number

toll-freetoll-free number800 number
In the U.S., directory assistance for companies with toll-free "800 numbers" (with area codes 800, 844, 855, 866, 877, and 888) is available from toll-free directory assistance, reachable by dialing 1-800-555-1212.

Federal Communications Commission

FCCFederal Communications Commission (FCC)Federal Communication Commission
Toll-free directory assistance is provided by telecommunication providers, namely AT&T and Verizon, as mandated by the Federal Communications Commission.

Call centre

call centercall centerscall centres
The service of 4-1-1 queries is often outsourced to a call centre that specializes in that function.

Data aggregation

aggregationdata aggregatoraggregate
Today, when the market is fragmented amongst many carriers, the data must be aggregated by a data aggregator specializing in directory listings.

Vonage

Vonage Holdings, Inc.
Some carriers such as Vonage do not send their customer rolls to the aggregator.

Telstra

TelecomSensisTelstra Corporation
Other directory service numbers are carrier specific and can only be accessed by customers of that particular provider, for example Sensis on 1234 is a premium operator-assist directory service that only certain Telstra customers are able to access.

Yellow pages

Páginas AmarillasBusiness Directorydirectory
Four of these, 118 118 (The Number), 118 212 (Maureen), 118 247 (Yellow Pages) and 118 500 (British Telecom) are among the most expensive and yet have over 90% of the market, mostly due to heavy advertising.

BT Group

BTBritish TelecomBritish Telecommunications
Four of these, 118 118 (The Number), 118 212 (Maureen), 118 247 (Yellow Pages) and 118 500 (British Telecom) are among the most expensive and yet have over 90% of the market, mostly due to heavy advertising.