Here’s the summary for the wikipedia article you mentioned in your comment:
A ZIP Code is a system of postal codes used by the United States Postal Service (USPS). Introduced on July 1, 1963, the basic format consisted of five digits. In 1983, an extended ZIP+4code was introduced; it included the five digits of the ZIP Code, followed by a hyphen and four digits that designated a more specific location. The term ZIP is an acronym for Zone Improvement Plan; it was chosen to suggest that the mail travels more efficiently and quickly (zipping along) when senders use the code in the postal address. ZIP Code is a trademark and ZIP+4 is a registered trademark of the United States Postal Service, which also registered ZIP Code as a service mark until 1997.
If the number in the username is a zip code, they don’t care.
Is there a four digit ZIP code format I’m not aware of
I guess it’s called US defaultism
Here’s the summary for the wikipedia article you mentioned in your comment:
This list shows an overview of postal code notation schemes for all countries that have postal or ZIP Code systems.article | about
ZIP codes are US specific, postal codes are international.
I looked it up before my comment
Here’s the summary for the wikipedia article you mentioned in your comment:
A ZIP Code is a system of postal codes used by the United States Postal Service (USPS). Introduced on July 1, 1963, the basic format consisted of five digits. In 1983, an extended ZIP+4 code was introduced; it included the five digits of the ZIP Code, followed by a hyphen and four digits that designated a more specific location. The term ZIP is an acronym for Zone Improvement Plan; it was chosen to suggest that the mail travels more efficiently and quickly (zipping along) when senders use the code in the postal address. ZIP Code is a trademark and ZIP+4 is a registered trademark of the United States Postal Service, which also registered ZIP Code as a service mark until 1997.article | about