The german phone code 05402 represents Bissendorf, Kreis Osnabrück in Niedersachsen.
Note for calls from abroad: In addition to the German country code (+49 or 0049) you can omit the foregoing zero of the dialling code for Bissendorf, Kreis Osnabrück. So you can dial +495402... and add the number of the phone line you want to reach.