Ciudad Madero, Tamaulipas, is in Mexican area code 833, the same as Tampico.
To call a landline in Ciudad Madero, dial +52 833.
To call a mobile from Ciudad Madero, dial +52 1 833.
(The plus sign means "insert your international access prefix here." From a GSM mobile phone, you can enter the number in full international format, starting with the plus sign. The most common prefix is 00, but North America (USA, Canada, etc.) uses 011, Japan uses 010, Australia uses 0011, and many other countries use different prefixes.)
The country code and area code of Ciudad Real, Spain is 34, 826.
The country code and area code of Ciudad Camargo, Mexico is 52, (01)891.
The country code and area code of Ciudad Acuqa, Mexico is 52, (01)877.
The country code and area code of Ciudad Constitucion, Mexico is 52, (01)613.
The country code and area code of Ciudad Mante- Tamps., Mexico is 52, (01)831.
The country code and area code of Ciudad Sabinas Hidalgo, Mexico is 52, (01)824.
The country code and area code of Ciudad Del Este, Paraguay is 595, (0)61.
The country code and area code of Ciudad JuÌÁrez- Chih., Mexico is 52, (01)656.
The country code and area code of Ciudad Valles- S.L.P., Mexico is 52, (01)481.
The country code and area code of Ciudad Victoria- Tamps., Mexico is 52, (01)834.
The country code and area code of Ciudad GuzmÌÁn- Jal., Mexico is 52, (01)341.
The country code and area code of Ciudad Delicias- Chih., Mexico is 52, (01)639.