Area Code +52-81-(10000000...10009999) located in Monterrey, Nuevo León (NLE), more detail is as below. Place International Dialing Code : 52 International Prefix : 00 National Prefix : 01 Cell Prefix : 1 National Destination Code : 81 Subscriber Number From : 10000000 Subscriber Number To : 10009999 National Destination Code Length : 2 Uses National Destination Code : Yes National Significant Number Length : 10 Number Type : M (Mobile, Cellular) Carrier Name : PEGASO PCS, S.A. 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 : NLE Region Name : Nuevo León City : Monterrey Timezone : America/Monterrey Coordinated Universal Time : -06:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 10 Latitude : 25.6700 Longitude : -100.3100 ‹ previous : +52-797-(9777000...9779999) next › : +52-81-(10010000...10019999) Dialling Instructions For trunk calls: 1 81 10000000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 52 81 10000000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 10000000 ~ 10009999 (Count: 10,000) Example: +52-81-10000000 / 0052-81-10000000 (0181-10000000 / 01-81-10000000) +52-81-10000001 / 0052-81-10000001 (0181-10000001 / 01-81-10000001) +52-81-10000002 / 0052-81-10000002 (0181-10000002 / 01-81-10000002) +52-81-10000003 / 0052-81-10000003 (0181-10000003 / 01-81-10000003) +52-81-10000004 / 0052-81-10000004 (0181-10000004 / 01-81-10000004) ...+52-81-xxxxxxxx / 0052-81-xxxxxxxx (0181-xxxxxxxx / 01-81-xxxxxxxx) ...+52-81-10009995 / 0052-81-10009995 (0181-10009995 / 01-81-10009995) +52-81-10009996 / 0052-81-10009996 (0181-10009996 / 01-81-10009996) +52-81-10009997 / 0052-81-10009997 (0181-10009997 / 01-81-10009997) +52-81-10009998 / 0052-81-10009998 (0181-10009998 / 01-81-10009998) +52-81-10009999 / 0052-81-10009999 (0181-10009999 / 01-81-10009999)