context: 57 xxx-xx-xx - Kharkov 57 xxx-xx-xx - Kharkov region 57 2 xx-xx-xx - Kharkov (six-digit numbers on some exchanges) 57 369 xx-xx - Paid hotlines ( dialing is available only from the territory of Kharkov and the region) [6] 57 4 0 x-xx-xx - Novaya Vodolaga 57 4 1 x-xx-xx - Volchansk 57 4 2 x-xx-xx - Kupyansk 57 4 3 x-xx- xx - Raisins 57 4 4 x-xx-xx - Krasnograd 57 4 5 x-xx-xx - Lozova 57 4 6 x-xx-xx - Chuguev 57 4 7 x-xx-xx - Zmiev 57 4 8 x-xx- xx - Pervomaysky 57 4 9 x-xx-xx - Balakleya 57 5 0 x-xx-xx - Two-place 57 57 1 x-xx-xx - Shevchenkovo ​​57 5 2 x-xx-xx - Velikiy Burluk 57 5 3 x-xx -xx - Valki 57 5 4 x-xx-xx - Twins 57 5 5 x-xx-xx - Kegichevka 57 5 6 x-xx-xx - Kras Okutsk 57 5 7 x-xx-xx - Barvenkovo ​​57 5 8 x-xx-xx - Bogodukhov 57 5 9 x-xx-xx - Borovaya 57 6 1 x-xx-xx - Zachepilovka 57 6 2 x-xx-xx - Sakhnovschina 57 6 3 x-xx-xx - Dergachi 57 6 4 x-xx-xx - Zolochev 57 6 6 x-xx-xx - Kolomak 57 6 8 x-xx-xx - Pechenegs 57 7 8 1-xx-xx - Intertelecom
question: What is the telephone code of Kharkov?
answers.text: 57