Area Code +421-55-(6640000...6649999) 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 : 6640000 Subscriber Number To : 6649999 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-(6630000...6639999) next › : +421-55-(6650000...6659999) Dialling Instructions For trunk calls: 0 55 6640000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 421 55 6640000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 6640000 ~ 6649999 (Count: 10,000) Example: +421-55-6640000 / 00421-55-6640000 (055-6640000 / 0-55-6640000) +421-55-6640001 / 00421-55-6640001 (055-6640001 / 0-55-6640001) +421-55-6640002 / 00421-55-6640002 (055-6640002 / 0-55-6640002) +421-55-6640003 / 00421-55-6640003 (055-6640003 / 0-55-6640003) +421-55-6640004 / 00421-55-6640004 (055-6640004 / 0-55-6640004) ...+421-55-xxxxxxx / 00421-55-xxxxxxx (055-xxxxxxx / 0-55-xxxxxxx) ...+421-55-6649995 / 00421-55-6649995 (055-6649995 / 0-55-6649995) +421-55-6649996 / 00421-55-6649996 (055-6649996 / 0-55-6649996) +421-55-6649997 / 00421-55-6649997 (055-6649997 / 0-55-6649997) +421-55-6649998 / 00421-55-6649998 (055-6649998 / 0-55-6649998) +421-55-6649999 / 00421-55-6649999 (055-6649999 / 0-55-6649999)