Area Code +421-55-(6660000...6669999) 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 : 6660000 Subscriber Number To : 6669999 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 : Slovak Telekom 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-(6650000...6659999) next › : +421-55-(6670000...6679999) Dialling Instructions For trunk calls: 0 55 6660000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 421 55 6660000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 6660000 ~ 6669999 (Count: 10,000) Example: +421-55-6660000 / 00421-55-6660000 (055-6660000 / 0-55-6660000) +421-55-6660001 / 00421-55-6660001 (055-6660001 / 0-55-6660001) +421-55-6660002 / 00421-55-6660002 (055-6660002 / 0-55-6660002) +421-55-6660003 / 00421-55-6660003 (055-6660003 / 0-55-6660003) +421-55-6660004 / 00421-55-6660004 (055-6660004 / 0-55-6660004) ...+421-55-xxxxxxx / 00421-55-xxxxxxx (055-xxxxxxx / 0-55-xxxxxxx) ...+421-55-6669995 / 00421-55-6669995 (055-6669995 / 0-55-6669995) +421-55-6669996 / 00421-55-6669996 (055-6669996 / 0-55-6669996) +421-55-6669997 / 00421-55-6669997 (055-6669997 / 0-55-6669997) +421-55-6669998 / 00421-55-6669998 (055-6669998 / 0-55-6669998) +421-55-6669999 / 00421-55-6669999 (055-6669999 / 0-55-6669999)