: The first digit of a US ZIP code represents a group of states (e.g., "0" covers the Northeast and Caribbean territories like Puerto Rico).
: You can verify any specific US address and find its correct ZIP+4 code using the USPS ZIP Code Lookup tool . ZIP Code™ Lookup | USPS 007312 zip
: Several ZIP codes in Jersey City, New Jersey, begin with "073," such as 07310 . : The first digit of a US ZIP
: Standard US codes range from 00501 (Holtsville, NY) to 99950 (Ketchikan, AK). begin with "073
