Average GPS coordinates for Colchester Postcode location: 41.566, -72.344. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Colchester on map:

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Listing cities & postcodes (1):
>> Connecticut, 06415 Colchester, New London, GPS coordinates: 41.5662,-72.3441