enquiries (Sunrise) 1880 – Directory enquiries (Salt) Alternate proposed plan Instead of E.164/2002, another more ambitious numbering plan was proposed. In this plan the prefix 0 was discarded, and the area codes were defined differently, with 20 to 49 for geographic areas, 50 to 59 reserved, 60-69 for nationwide numbering, 70-79 for mobile services, 80-89 for shared-cost and toll-free numbers, and 90 for premium-rate services. The plan was not implemented because it required too many phone number and prefix changes, with associated high costs. Changes After 2002 The area code 01 was replaced with 044 (Zurich) Between 1996 to 2002 (plan 2002) On 29 March 2002 the Swiss dialing plan changed to a closed dialing plan, i.e. the zone prefix become mandatory also for local calls. 058 - Corporate access (since 1 June 2000) Until 1996 (plan 1996) The previous plan removed a lot of area prefixes and added the seventh digit in phone numbers (usually a phone number (0cc) yx xx xx became (0dd) zzx xx xx). 023 – Short prefix for some French regions 025 – Chablais, since 2 November 1996 in 024 026 – Martigny, since 2 November 1996 in 027 028 – high Valais, since 2 November 1996 in 027 029 – Greyerzerland/Pays d'Enhaut, since 2 November 1996 in 026 030 – Zweisimmen, since 9 November 1996 in 033 035 – Langnau im Emmental, since 9 November 1996 in 034 036 – Interlaken, since 9 November 1996 in 033 037 – Fribourg, since 2 November 1996 in 026 038 – Neuchâtel, since 9 November 1996 in 032 039 – La-Chaux-de-Fonds, since 9 November 1996 in 032 040 – Telepage Swiss (pager) 042 – Zug, since 23 March 1996 in 041 043 – Schwyz, since 23 March 1996 in 041 044 – Altdorf, since 23 March 1996 in 041 045 – Sursee, since 23 March 1996 in 041 046 – Toll free, moved into 155 and then into 0800 051 – Zürich, moved into 01+7 digits, then replaced with 044 053 – Schaffhausen, since 23 March 1996 in 052 054 – Frauenfeld, since 23 March 1996 in 052 057 – Wohlen, since 23 March 1996 in 056 058 – Glarus, since 23 March 1996 in 055 059 – Short prefix for German regions, also for parts of France surrounding Geneva and northern Italy 061 – Basel 062 – Olten 063 – Langenthal, withdrawn and integrated into 062