КодСтранаРегионГородОператорДобавлено
+850 53 Северная КореяSouth HamgyongHamhung2013-10-18
+850 53 Северная КореяHamhung (South Hamgyong)2013-10-18
+850 53 Korea, NorthHamhŭng, Hamgyŏng-namdoKorea Post and Telecommunications Corporation (KPTC)