Interactive map of zip codes in Iwanai Gun, Japan. Just click on the location you desire for a postal code/address for your mails destination.
Each administrative division maintains its own postal code for mail delivery purposes. Having the correct code is essential to your mails delivery. Locate the correct postal codes for Iwanai Gun in the list above by choosing the destination city or town you are sending to.
Unsure which city to choose? Just use our lookup by address feature at the top of the page or click on the our interactive map to access your needed zip code.