Prosečne GPS koordinate za poštanski broj 20100: 43.297, -1.902

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Spisak gradova:
>> Errenteria 20100, Pais Vasco, Guipúzcoa, GPS koordinate: 43.3119,-1.9023
>> Landarbaso 20100, Pais Vasco, Guipúzcoa, GPS koordinate: 43.2582,-1.9067
>> Lezo 20100, Pais Vasco, Guipúzcoa, GPS koordinate: 43.3214,-1.8974