Area Code +52-444-(1020000...1023999) located in San Luis Potosí, San Luis (SLP), more detail is as below. Place International Dialing Code : 52 International Prefix : 00 National Prefix : 01 National Destination Code : 444 Subscriber Number From : 1020000 Subscriber Number To : 1023999 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 : SLP Region Name : San Luis City : San Luis Potosí Timezone : America/Mexico_City Coordinated Universal Time : -06:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 10 Latitude : 22.1500 Longitude : -100.9800 ‹ previous : +52-444-(1018896...1019999) next › : +52-444-(1025000...1027999) Dialling Instructions For trunk calls: 1 444 1020000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 52 444 1020000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 1020000 ~ 1023999 (Count: 4,000) Example: +52-444-1020000 / 0052-444-1020000 (01444-1020000 / 01-444-1020000) +52-444-1020001 / 0052-444-1020001 (01444-1020001 / 01-444-1020001) +52-444-1020002 / 0052-444-1020002 (01444-1020002 / 01-444-1020002) +52-444-1020003 / 0052-444-1020003 (01444-1020003 / 01-444-1020003) +52-444-1020004 / 0052-444-1020004 (01444-1020004 / 01-444-1020004) ...+52-444-xxxxxxx / 0052-444-xxxxxxx (01444-xxxxxxx / 01-444-xxxxxxx) ...+52-444-1023995 / 0052-444-1023995 (01444-1023995 / 01-444-1023995) +52-444-1023996 / 0052-444-1023996 (01444-1023996 / 01-444-1023996) +52-444-1023997 / 0052-444-1023997 (01444-1023997 / 01-444-1023997) +52-444-1023998 / 0052-444-1023998 (01444-1023998 / 01-444-1023998) +52-444-1023999 / 0052-444-1023999 (01444-1023999 / 01-444-1023999)