Average GPS coordinates for Alto Postcode location: 41.227, -8.437. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Alto on map:

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Listing cities & postcodes (9):
>> Porto, 4560-232 Alto, Penalva do Castelo, Lombo, GPS coordinates: 41.2167,-8.5667
>> Porto, 4560-807 Alto, Penalva do Castelo, Vale da Porca, GPS coordinates: 41.3028,-8.3917
>> Porto, 4600-595 Alto, Corvo, Edroso, GPS coordinates: 41.25,-8.3933
>> Porto, 4620-031 Alto, Ribeira Grande, Constantim, GPS coordinates: 41.2,-8.425
>> Porto, 4620-634 Alto, Ribeira Grande, Olmos, GPS coordinates: 41.175,-8.4417
>> Porto, 4630-003 Alto, Ribeira Brava, Constantim, GPS coordinates: 41.2167,-8.275
>> Porto, 4630-539 Alto, Ribeira Brava, Ferreira, GPS coordinates: 41.1611,-8.3778
>> Porto, 4635-163 Alto, Ribeira Brava, Carrapatas, GPS coordinates: 41.3083,-8.425
>> Porto, 4635-666 Alto, Ribeira Brava, Talhinhas, GPS coordinates: 41.2167,-8.6333