Area Code +421-55-(3700000...3799999) located in Košice, Košický (KI), more detail is as below. Place International Dialing Code : 421 International Prefix : 00 National Prefix : 0 National Destination Code : 55 Subscriber Number From : 3700000 Subscriber Number To : 3799999 National Destination Code Length : 2 Uses National Destination Code : Yes National Significant Number Length : 9 Number Type : G (Geographic Land Line, Fixed Line) Carrier Name : DH Telecom Click here to buy Slovakia Area Code Database Other Information Language Code : sk (Slovak) Country Number : 703 (Slovakia) Country Code : SK (Slovakia) Region Code : KI Region Name : Košický City : Košice Timezone : Europe/Bratislava Coordinated Universal Time : +01:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 9 Latitude : 48.7200 Longitude : 21.2600 ‹ previous : +421-55-(3373000...3373999) next › : +421-55-(3800000...3899999) Dialling Instructions For trunk calls: 0 55 3700000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 421 55 3700000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 3700000 ~ 3799999 (Count: 100,000) Example: +421-55-3700000 / 00421-55-3700000 (055-3700000 / 0-55-3700000) +421-55-3700001 / 00421-55-3700001 (055-3700001 / 0-55-3700001) +421-55-3700002 / 00421-55-3700002 (055-3700002 / 0-55-3700002) +421-55-3700003 / 00421-55-3700003 (055-3700003 / 0-55-3700003) +421-55-3700004 / 00421-55-3700004 (055-3700004 / 0-55-3700004) ...+421-55-xxxxxxx / 00421-55-xxxxxxx (055-xxxxxxx / 0-55-xxxxxxx) ...+421-55-3799995 / 00421-55-3799995 (055-3799995 / 0-55-3799995) +421-55-3799996 / 00421-55-3799996 (055-3799996 / 0-55-3799996) +421-55-3799997 / 00421-55-3799997 (055-3799997 / 0-55-3799997) +421-55-3799998 / 00421-55-3799998 (055-3799998 / 0-55-3799998) +421-55-3799999 / 00421-55-3799999 (055-3799999 / 0-55-3799999)