4 ms·
US 9-digit postcodes ("ZIP+4") were introduced decades ago (1983?) and are publicly findable online given an address. The US also has a full 11-digit address c
by sib 2y ago
US 9-digit postcodes ("ZIP+4") were introduced decades ago (1983?) and are publicly findable online given an address.
The US also has a full 11-digit address code that is printed (by the USPS) on mail in a bar code when you mail a piece. This should take the mailpiece to a unique address.