Average GPS coordinates for Peconic Postcode location: 41.039, -72.467. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Peconic on map:

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Listing cities & postcodes (1):
>> New York, 11958 Peconic, Suffolk, GPS coordinates: 41.0392,-72.4666