Average GPS coordinates for Martell Postcode location: 19.265, -100.201. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Martell on map:

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Listing cities & postcodes (1):
>> Mexico, 55020 Martell, Ecatepec de Morelos, Ecatepec de Morelos, GPS coordinates: 19.2654,-100.2008