Average GPS coordinates for San Marco Postcode location: 43.462, 13.123. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). San Marco on map:

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Listing cities & postcodes (1):
>> Marche, 63900 San Marco, Ascoli Piceno, GPS coordinates: 43.4616,13.1233