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Telephone numbers in Singapore
Telephone numbers in Singapore, also known as the Singapore telephone numbering plan, are 8-digit numbers under country code +65 with no area codes, administered by the IMDA.
Telephone numbers in South Africa
Telephone numbers in South Africa use the +27 country code, 10-digit subscriber numbers, and area codes such as 011 for Johannesburg and 021 for Cape Town.
Telephone numbers in South Korea
Telephone numbers in South Korea, governed by the Korean telephone numbering plan, use country code +82, with Seoul's area code 02, mobile prefix 010, and emergency numbers 112 and 119.
Telephone numbers in Spain
Telephone numbers in Spain, governed by the Spanish national numbering plan, are closed nine-digit numbers under country code 34 that must always be dialed in full.
Telephone numbers in Sri Lanka
Telephone numbers in Sri Lanka follow a National Numbering Plan run by the TRCSL, using country code +94 and uniform 10-digit numbers with area codes like 011 for Colombo.
Telephone numbers in Switzerland
Telephone numbers in Switzerland, also called the Swiss numbering plan, use country code +41, nine-digit numbers, and closed dialling since 2002, and are administered by OFCOM in Biel/Bienne.
Telephone numbers in Thailand
Telephone numbers in Thailand are administered by the NBTC under country code +66: 8-digit fixed-line numbers with area codes like 02 for Bangkok, and 9-digit mobile numbers.
Telephone numbers in the Netherlands
Telephone numbers in the Netherlands follow the national numbering plan, which uses country code +31, 141 geographic area codes, 06 mobile numbers, and service ranges including 0800 and 0900.
Telephone numbers in the Philippines
Telephone numbers in the Philippines, also called area codes in the Philippines, use country code +63 with area codes and 10-digit mobile numbers regulated by the NTC.
Telephone numbers in the Republic of Ireland
Telephone numbers in the Republic of Ireland, also called phone numbers in Ireland, use the country code +353 and are managed by the regulator ComReg.
Telephone numbers in the United Kingdom
Telephone numbers in the United Kingdom, also called British telephone numbers, follow a plan of geographic 01 and 02 numbers with area codes, mobiles beginning 07, and short codes.
Telephone numbers in Turkey
Telephone numbers in Turkey, also called area codes in Turkey, use country code +90 and 10-digit numbers, dialed with a leading 0 domestically and +90 from abroad.
Telephone receiver
A telephone receiver is the earpiece of a telephone, a transducer that converts incoming voice currents into sound, traditionally by electromagnetic action on a diaphragm.
Telephone survey
A telephone survey is a survey research method in which interviewers ask sampled respondents questions over the phone, usually via random digit dialing; it became a primary mode in the 1970s.
Telephone switchboard
A telephone switchboard is a panel where an operator connects telephone lines by hand, carrying every call from 1878 until automation spread over the twentieth century.
Telephone tapping
Telephone tapping is the interception of telephone calls or messages in transit by a third party, either lawful interception under a court order or covert criminal tapping.
Telephone-company spelling alphabets
Telephone-company spelling alphabets are word lists, one word per letter, devised by telegraph and telephone companies so letters dictated over noisy circuits were conveyed unambiguously, as in Western Union's list beginning "Adams, Boston, Chicago".
Telephony
Telephony is the real-time, two-way transmission of speech over a telecommunication network, spanning the traditional circuit-switched PSTN and modern packet-switched services such as VoIP, VoLTE, and VoNR.
Telephoto lens
A telephoto lens is a photographic lens with a positive front group and negative rear group, making its barrel shorter than its focal length; Dallmeyer patented the design in 1891.
Teleportation
Teleportation, also called quantum teleportation, transfers the exact state of a quantum system to a distant location using entanglement and classical communication; proposed in 1993, first demonstrated in 1997.
Telepresence
Telepresence is a set of technologies that lets a person act and perceive at a distant location as if physically present, a term popularized by Marvin Minsky in 1980.
Teleprinter
A teleprinter, also called a teletypewriter or TTY, is an electromechanical machine that sends typed text over wire or radio as coded pulses to a receiving printer.
Teleprompter
A teleprompter is a display device showing a scrolling script via glass over the camera lens, invented by Hubert Schlafly in 1950 for television.
Télérama
Télérama is a French weekly culture magazine reviewing and rating cinema, television, exhibitions, streaming, and music. It began as Radio Cinéma Télévision in 1950 and was renamed in 1960.
Telerehabilitation
Telerehabilitation (remote rehabilitation, teletherapy, virtual rehabilitation): delivery of rehabilitation services over a distance via ICT; synchronous, asynchronous, or hybrid; WFNR 2025 consensus definition; evidence of equivalence with in-person care.
Teles Pires hydroelectric plant
The Teles Pires hydroelectric plant (Portuguese: UHE Teles Pires) is a 1,820 MW run-of-river dam on the Teles Pires River in the Brazilian Amazon, in commercial operation since 2015.
Telesat
Telesat is a Canadian satellite operator headquartered in Ottawa, founded in 1969 and known for launching Anik A1, the world's first domestic commercial geostationary communications satellite.
Telescope
A telescope is an instrument that collects faint light from astronomical sources and focuses it into an image, invented around 1608 and first used by Galileo in 1610.
Telescope Array Project
The Telescope Array is a hybrid observatory for ultra-high-energy cosmic rays in the desert west of Delta, Utah, combining 507 surface detectors with fluorescence telescopes since 2008.
Telescope Partners
Telescope Partners is a San Francisco growth capital investment firm founded by Mickey Arabelovic, active since 2016, that invests in B2B enterprise software companies, with $934 million in assets under management as of 2026.