Area Code +52-421-(4542000...4542509) located in Coroneo, Guanajuato (GUA), more detail is as below. Place International Dialing Code : 52 International Prefix : 00 National Prefix : 01 National Destination Code : 421 Subscriber Number From : 4542000 Subscriber Number To : 4542509 National Destination Code Length : 3 Uses National Destination Code : Yes National Significant Number Length : 10 Number Type : G (Geographic Land Line, Fixed Line) Carrier Name : TELEFONOS DE MEXICO, S.A.B. DE C.V. Click here to buy Mexico Area Code Database Other Information Language Code : es (Spanish) Country Number : 484 (Mexico) Country Code : MX (Mexico) Region Code : GUA Region Name : Guanajuato City : Coroneo Timezone : America/Mexico_City Coordinated Universal Time : -06:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 10 Latitude : 20.2600 Longitude : -100.3400 ‹ previous : +52-421-(4541000...4541149) next › : +52-421-(4542510...4542809) Dialling Instructions For trunk calls: 1 421 4542000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 52 421 4542000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 4542000 ~ 4542509 (Count: 510) Example: +52-421-4542000 / 0052-421-4542000 (01421-4542000 / 01-421-4542000) +52-421-4542001 / 0052-421-4542001 (01421-4542001 / 01-421-4542001) +52-421-4542002 / 0052-421-4542002 (01421-4542002 / 01-421-4542002) +52-421-4542003 / 0052-421-4542003 (01421-4542003 / 01-421-4542003) +52-421-4542004 / 0052-421-4542004 (01421-4542004 / 01-421-4542004) ...+52-421-xxxxxxx / 0052-421-xxxxxxx (01421-xxxxxxx / 01-421-xxxxxxx) ...+52-421-4542505 / 0052-421-4542505 (01421-4542505 / 01-421-4542505) +52-421-4542506 / 0052-421-4542506 (01421-4542506 / 01-421-4542506) +52-421-4542507 / 0052-421-4542507 (01421-4542507 / 01-421-4542507) +52-421-4542508 / 0052-421-4542508 (01421-4542508 / 01-421-4542508) +52-421-4542509 / 0052-421-4542509 (01421-4542509 / 01-421-4542509)