Yes, Sweden has area codes ranging from 1 to 3 digits, not including the trunk prefix 0. For example, area code 08 (or +46 8) is Stockholm, and 0687 (or +46 687) is Svenstavik.
(The plus sign means "insert your international access prefix here." From a GSM mobile phone, you can enter the number in full international format, starting with the plus sign. The most common prefix is 00, but North America (USA, Canada, etc.) uses 011, and many other countries use different prefixes.)