This place has at least 200 postal codes but no value when using geonames-search and no wikipedia article or any existence of the place besides some addresses in a quick google search.
Is this an error or it is done on purpose to assign a placeholder value to pincode ending in '00'?
That would be perfect.
In addition to using admin name 3, where available; we can use admin name 2 instead if available; else admin name 1 instead. Just to cover most of "Ikanikeisaiganaibaai" place names.