Area Code +33-457-(390000...399999) located in Grenoble, ISERE (38), more detail is as below. Place International Dialing Code : 33 International Prefix : 00 National Prefix : 0 National Destination Code : 457 Subscriber Number From : 390000 Subscriber Number To : 399999 National Destination Code Length : 3 Uses National Destination Code : Yes National Significant Number Length : 9 Number Type : G (Geographic Land Line, Fixed Line) Carrier Name : NUMERICABLE Click here to buy France Area Code Database Other Information Language Code : fr (French) Country Number : 250 (France) Country Code : FR (France) Region Code : 38 Region Name : ISERE City : Grenoble Timezone : Europe/Paris Coordinated Universal Time : +01:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 9 Latitude : 45.1900 Longitude : 5.7200 ‹ previous : +33-457-(380000...389999) next › : +33-457-(400000...409999) Dialling Instructions For trunk calls: 0 457 390000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 33 457 390000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 390000 ~ 399999 (Count: 10,000) Example: +33-457-390000 / 0033-457-390000 (0457-390000 / 0-457-390000) +33-457-390001 / 0033-457-390001 (0457-390001 / 0-457-390001) +33-457-390002 / 0033-457-390002 (0457-390002 / 0-457-390002) +33-457-390003 / 0033-457-390003 (0457-390003 / 0-457-390003) +33-457-390004 / 0033-457-390004 (0457-390004 / 0-457-390004) ...+33-457-xxxxxx / 0033-457-xxxxxx (0457-xxxxxx / 0-457-xxxxxx) ...+33-457-399995 / 0033-457-399995 (0457-399995 / 0-457-399995) +33-457-399996 / 0033-457-399996 (0457-399996 / 0-457-399996) +33-457-399997 / 0033-457-399997 (0457-399997 / 0-457-399997) +33-457-399998 / 0033-457-399998 (0457-399998 / 0-457-399998) +33-457-399999 / 0033-457-399999 (0457-399999 / 0-457-399999)