Oakland USA - CA (+1 510) Oberhausen Germany (+49 208) Oceanside USA - CA (+1 442) Odense Denmark (+45) Odessa Ukraine (+380 482) Offenbach Germany (+49 69) Okayama Japan (+81 86) Oklahoma City USA - OK (+1 405) Oldenburg Germany (+49 441) Oldham UK (+44 161) Olomouc Cze...