The code does not exist as a valid five-digit ZIP Code in the United States , as the standard US ZIP Code system uses only five numerical digits. It is, however, a valid six-digit postal code used in Russia . Identifying Postal Code 145973

Other countries have their own unique systems. For instance, in Canada, they use a six-character alphanumeric code (e.g., A1A 1A1) ftp.bills.com.au World Postal Code - free zip/postal code lookup

: In the United States, ZIP Codes range from 00501 to 99950. A six-digit number like 145973 cannot be a domestic US ZIP Code. Understanding Postal Code Systems