Area Code +30-21-(05100000...05109999) located in Athens, Attiki (A1), more detail is as below. Place International Dialing Code : 30 International Prefix : 00 National Prefix : 0 National Destination Code : 21 Subscriber Number From : 05100000 Subscriber Number To : 05109999 National Destination Code Length : 2 Uses National Destination Code : Yes National Significant Number Length : 10 Number Type : G (Geographic Land Line, Fixed Line) Carrier Name : OTE S.A Click here to buy Greece Area Code Database Other Information Language Code : el (Greek) Country Number : 300 (Greece) Country Code : GR (Greece) Region Code : A1 Region Name : Attiki City : Athens Timezone : Europe/Athens Coordinated Universal Time : +02:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 10 Latitude : 37.9800 Longitude : 23.7200 ‹ previous : +30-21-(05060000...05069999) next › : +30-21-(05110000...05119999) Dialling Instructions For trunk calls: - 21 05100000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 30 21 05100000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 05100000 ~ 05109999 (Count: 10,000) Example: +30-21-05100000 / 0030-21-05100000 (021-05100000 / 0-21-05100000) +30-21-05100001 / 0030-21-05100001 (021-05100001 / 0-21-05100001) +30-21-05100002 / 0030-21-05100002 (021-05100002 / 0-21-05100002) +30-21-05100003 / 0030-21-05100003 (021-05100003 / 0-21-05100003) +30-21-05100004 / 0030-21-05100004 (021-05100004 / 0-21-05100004) ...+30-21-xxxxxxxx / 0030-21-xxxxxxxx (021-xxxxxxxx / 0-21-xxxxxxxx) ...+30-21-05109995 / 0030-21-05109995 (021-05109995 / 0-21-05109995) +30-21-05109996 / 0030-21-05109996 (021-05109996 / 0-21-05109996) +30-21-05109997 / 0030-21-05109997 (021-05109997 / 0-21-05109997) +30-21-05109998 / 0030-21-05109998 (021-05109998 / 0-21-05109998) +30-21-05109999 / 0030-21-05109999 (021-05109999 / 0-21-05109999)