xxxx'.) 1900 xxx xxxx - Premium rate services Short codes 0xx - International access codes 13xx - Voicemails 16xx - Service providers' customer services 1777 - Non-emergency ambulance 18xx - International calling card access numbers 993 - Ministry of Health's special ambulance service - previously used for suspected cases of H1N1 and SARS and currently used for cases of COVID-19 995 - Singapore Civil Defence Force - Fire or Emergency Ambulance 999 - Police Telephone exchanges This is the list of telephone exchanges in Singapore. They also share the telephone exchanges with OpenNet locations, cable TV and '6'-regoed phone lines (each from SingTel and StarHub). Ang Mo Kio Telephone Exchange Ayer Rajah Telephone Exchange - August 1977 Bedok Telephone Exchange - 20 February 1973 Bukit Panjang Telephone Exchange Central Telephone Exchange - 14 July 1980 Changi Telephone Exchange Geylang Telephone Exchange Hougang Telephone Exchange Jurong Telephone Exchange Jurong East Telephone Exchange Jurong West Telephone Exchange Lavender Telephone Exchange - 13 March 1973 Orchard Telephone exchange Pasir Ris Telephone Exchange - 14 October 1991 Paya Lebar Telephone Exchange - 8 October 1960 Queenstown Telephone Exchange - 7 July 1957 Seletar Telephone Exchange Tampines Telephone Exchange Tanjong Katong Telephone Exchange - 11 July 1957 Tanjong Pagar Telephone Exchange Telok Blangah Telephone Exchange Tuas Telephone Exchange Woodlands Telephone Exchange Woodlands East Telephone Exchange (Under review due to the new HDB Estates in Woodlands/Sembawang and Yishun). Satellite stations Bukit Timah Satellite Station Seletar Satellite Station Sentosa Satellite Station Former telephone exchanges Changi (Upper Changi Road)Built in October 1958 City (George Street)Built in July 1959 Clementi Fort Canning Lim Chu Kang (Lorong Tukol) Nee Soon (Upper Thomson Road) Old Central (built in 1917) Sembawang (Jalan Ulu Sembawang, demolished in 2005) Tiong Bahru International direct dialing The generic international call prefix when making an international call is 000, which all telecommunications service providers are required to share. However, the code is not well known as carrier-specific access codes are generally used, such as 001 for SingTel, 002 for M1 and 008 for StarHub. On a mobile phone, a plus sign (+) can be keyed in as a substitute for the prefix. VoIP services VoIP services, such as Zone 1511, use prefixes in the 15xx range. For example, to call a number in London using Zone 1511, a subscriber would dial 1511 44 20 xxxx xxxx. Access codes in the 0xx range (for example, 018 - StarHub's