Average GPS coordinates for Sernada Postcode location: 41.188, -8.49. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Sernada on map:

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Listing cities & postcodes (2):
>> Porto, 4560-755 Sernada, Penalva do Castelo, Sesulfe, GPS coordinates: 41.2333,-8.43
>> Porto, 4585-002 Sernada, São Vicente, Atenor, GPS coordinates: 41.1417,-8.55