The US has a standard similar to that (we call it 'ZIP+4': a 4-digit addition to the earlier 5-digit ZIP code standard) but it didn't catch on in casual use. My ZIP+4 only contains a handful of addresses on my street. A street number and the ZIP+4 would be plenty enough to get a letter to me.
Institutional senders will usually use the ZIP+4 standard, but someone sending a letter in the mail typically will use the shorter 5-digit zip. Most people do not memorize the '+4' portion of their ZIP code.
My 5 digit zip code has about 8,000 addresses in it.
Institutional senders will usually use the ZIP+4 standard, but someone sending a letter in the mail typically will use the shorter 5-digit zip. Most people do not memorize the '+4' portion of their ZIP code.
My 5 digit zip code has about 8,000 addresses in it.