The first three digits previously indicated the mobile operator but mobile number portability has been implemented and any prefix can now be associated with any operator, 040 (owned by TeliaSonera) and 050 (owned by Elisa, formerly Radiolinja) are most common prefixes. 042 and 045 0 are also owned by TeliaSonera, whereas 046 is owned by Elisa. Other major networks are DNA Finland ( 041 , 044 and other numbers in the 045 range) and Saunalahti (numbers in the 045 range). Former operator codes include 043 , which was used in DCS "city phones". Some of these may still be in use. The former NMT network numbers used operator code 049 . Most NMT numbers were transferred to GSM numbers with format 04x0 123 456 or 0500 123 456, as there were only 6 subscriber numbers in NMT numbers.It also should be noted, that the area code for fixed landline subscriptions in Kymi is 05 , and should not be confused to mobile numbers starting with 050 .