Average GPS coordinates for Lontar Postcode location: -7.284, 112.665. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Lontar on map:

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Listing cities & postcodes (1):
>> East Java, 60216 Lontar, Surabaya, GPS coordinates: -7.28361,112.66479