why do we need to use city and state in our addresses if ZIP codes are already linked to the city and state?

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why do we need to use city and state in our addresses if ZIP codes are already linked to the city and state?

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Anonymous 0 Comments

This was in Canada, but about 10 years ago, I wanted to test this.

I wrote an apartment number and a postal code (that I was pretty sure was unique to that building) on an envelope and mailed it.

The US equivalent would be closer to an apartment number and zip+4.

The envelope was received. No name, street, or city.

I now live in the US, and my zip+4 maps to a portion of the floor in my building. I suspect my last name and zip+4 would be sufficient, but I’d be more comfortable with my apartment number and zip+4. But either way, it uniquely identifies my mailbox.

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