Liechtenstein previously used the Swiss telephone numbering plan (+41) under area code 075.Martindale-Hubbell International Law Directory, Part 1; Part 3, 1994, page 3076 (This was dialled as +41 75 from outside Switzerland and Liechtenstein).Doing Business in Liechtenstein, Price, Waterhouse Center for Transnational Taxation, 1991, page 123 However, on 5 April 1999, it adopted its own international code +423.Legal Guide to Audiovisual Media in Europe: Recent Legal Developments in Broadcasting, Film, Telecommunications and Global Information Society in Europe and Neighbouring States, The Observatory, 1999, page 77 Consequently, calls from Switzerland now require international dialling, using the 00423 prefix and the seven-digit number.Wandermagazin Schweiz, Volume 72, Issues 5-8, 1999, page 25 +Liechtenstein Numbering Plan (ITU-T E.164)Leading digit(s)Number of digitsServices13–4Access codes27Fixed-line services37Fixed-line services47reserved59reserved60–689International mobile services699Voicemail services for national mobile services77National mobile services807Special services: Free services81–837Special services (reserved)847Special services: Split-cost services85–867Special services (reserved)877Special services: Fixed-cost services887Special services (reserved)897Special services: Personal number services9007Premium services: Business, marketing9017Premium services: Entertainment, games, callback902–9057Premium services (reserved)9067Premium services: Adult entertainment907–9997Premium services (reserved) Liechtenstein Numbering Plan (ITU-T E.164)
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