Average GPS coordinates for Koto Postcode location: -0.777, 100.524. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Koto on map:

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Listing cities & postcodes (2):
>> West Sumatra, 25241 Koto, Padang, GPS coordinates: -1.09082,100.46829
>> West Sumatra, 27214 Koto, Tanah Datar, GPS coordinates: -0.4634,100.57884