Average GPS coordinates for Ilamos Postcode location: 18.817, -100.183. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Ilamos on map:

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Listing cities & postcodes (1):
>> Mexico, 51426 Ilamos, Tejupilco, GPS coordinates: 18.8167,-100.1833