Average GPS coordinates for Alianza Postcode location: 24.428, -98.539. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Alianza on map:

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Listing cities & postcodes (2):
>> Tamaulipas, 87410 Alianza, Matamoros, Matamoros (heroica Matamoros), GPS coordinates: 24.2545,-98.7333
>> Tamaulipas, 87507 Alianza, Valle Hermoso, Valle Hermoso, GPS coordinates: 24.6024,-98.3452