Average GPS coordinates for Zwammerdam Postcode location: 52.106, 4.726. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Zwammerdam on map:

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Listing cities & postcodes (2):
>> Provincie Zuid-Holland, 2470 Zwammerdam, Gemeente Alphen aan den Rijn, GPS coordinates: 52.1058,4.7264
>> Provincie Zuid-Holland, 2471 Zwammerdam, Gemeente Alphen aan den Rijn, GPS coordinates: 52.1058,4.7264