Average GPS coordinates for San Simon Postcode location: 18.997, -100.181. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). San Simon on map:

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Listing cities & postcodes (3):
>> Mexico, 51465 San Simon, Luvianos, GPS coordinates: 18.9417,-100.3583
>> Mexico, 51517 San Simon, Amatepec, GPS coordinates: 18.75,-100.1
>> Mexico, 56200 San Simon, Texcoco, GPS coordinates: 19.3,-100.0833