: Helpful for finding the extra four digits for business or precise residential mail. ZIP Code™ Lookup | USPS
Added in 1983, these extra four digits pinpoint a specific street segment, floor, or building. How to Verify a Correct ZIP Code
: Search by city/state or full street address.
Identify the central mail processing facility.
If you have an address and are unsure of the ZIP code, you can use these official tools:
: Helpful for finding the extra four digits for business or precise residential mail. ZIP Code™ Lookup | USPS
Added in 1983, these extra four digits pinpoint a specific street segment, floor, or building. How to Verify a Correct ZIP Code
: Search by city/state or full street address.
Identify the central mail processing facility.
If you have an address and are unsure of the ZIP code, you can use these official tools: