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Phone number 55 1000 3100 with countrycode 52
originate from Mexico City, FD in Mexico and it is a fixed line or mobile telephone number.
Mexico's isocodes are MX and MEX.
When calling from abroad use either two zeros (00) or a plus sign (+) and then the country code before typing the number. Example: +52 5510003100 or 0052 5510003100.
This number is a valid existing number.