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 Canada and the United States.

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-1-1N11N11 number
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).

118 118 (UK)

118 118118118118
118 118 (The Number) was the second most-expensive number at £11.23 for a 90-second call, but accounted for 40% of DQ calls, 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
555-1212 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 systemdatabasesDBMS
Almost all systems use custom database software to locate listings quickly.

Interactive voice response

IVRinteractive voice response (IVR)IVRS
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

CanadianCANCanadians
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

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

Illinois Bell

Illinois Bell Telephone CompanyAT&T IllinoisIllinois Bell Telephone

AT&T

AT&T Inc.Southwestern Bell CorporationAT&T Latin America

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

FCCU.S. Federal Communications CommissionFederal Communications Commission (FCC)
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

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

Telstra

BigPondTelstra CorporationAustralian Telecommunications Commission
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.

Value-added tax

VATvalue added taxGoods and Services Tax
Charges, including VAT, may not exceed £3.65 per 90 seconds.

Mobile phone

cell phonemobile phonesmobile
A number offering a directory enquiries service allowing people to request to be put through to a mobile phone number was established in June 2009.