Average GPS coordinates for Porto Postcode location: 41.15, -8.617. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Porto on map:

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Listing cities & postcodes (5):
>> Viana do Castelo, 4925-347 Porto, Santana, Carrapatas, GPS coordinates: 41.15,-8.6167
>> Viana do Castelo, 4950-198 Porto, Povoação, Corujas, GPS coordinates: 41.15,-8.6167
>> Viana do Castelo, 4950-250 Porto, Povoação, Edroso, GPS coordinates: 41.15,-8.6167
>> Viana do Castelo, 4960-379 Porto, São Roque do Pico, Lagoa, GPS coordinates: 41.15,-8.6167
>> Viana do Castelo, 4970-716 Porto, Corvo, Zoio, GPS coordinates: 41.15,-8.6167