Historic Numbering Plan Pre-1992
Before 1992, telephone numbers would consist of a 2 or 3-digit area code, and a 5 or 6-digit subscriber number. Example: (067) 85 000 and (04) 66 00 00.
In that year, a closed telephone numbering plan was adopted, with eight-digit telephone numbers incorporating the area code and full number dialling for local and national calls. Service numbers were to be three digits long, Directory numbers four digits and some companies were allocated five-digit numbers, ex. 07575. GSM telephony was introduced in 1993, and those numbers always start with a 4- or 9-.
Read more about this topic: Telephone Numbers In Norway
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