Verify ZIP codes, ZIP+4, and county by city or venue name

Finding a current USPS ZIP code for a named place can be trickier than it looks when the place is known by a track name or a common city name. A five-digit ZIP code often needs a ZIP+4 and the USPS county assignment to be useful for mail, license checks, or delivery software. This guide shows how to use zipcodelookup.io to search by city or place name, using U.S. harness racing tracks from the 2026 USTA graded stakes schedule as the worked example, and how to confirm the result against USPS records.

Search by city or venue name

zipcodelookup.io accepts search input by ZIP, city, ZIP+4, county, radius, distance, and a state directory. For a named venue, start with the city and state from a current list rather than only the track or venue name; this reduces ambiguity. If the name is specific enough, the tool can return the address and postal record directly. For example, the USTA's 2026 schedule names Plainridge Park, Miami Valley Raceway, The Red Mile, Harrah's Hoosier Park, Hollywood Dayton Raceway, The Meadowlands, and MGM Yonkers Raceway; write down the host city for each before you search. Woodbine Mohawk Park also appears in the USTA schedule but is in Canada, so it is outside a U.S. ZIP lookup.

The first step is to identify the mailing city, not just the racing brand. Many venues use a business name that differs from the USPS city name; searching by the mailing city returns the correct list. If the venue is a casino property, the mailing name may be the casino or operator rather than the raceway, so compare the returned address with the official USPS ZIP Code lookup before sending time-sensitive mail.

Read the ZIP+4 and county line

On the zipcodelookup.io result, note the nine-digit ZIP+4 code; the last four digits refine the delivery point to a block, building, or post office box. USPS location pages show that many PO Box and post office ZIP+4 codes end in -9998, as in the Foresthill Post Office at 24035 Racetrack St, Foresthill, CA 95631-9998 and the Eagle Creek Post Office at 6401 Gateway Dr, Indianapolis, IN 46254-9998. If a venue receives mail at a PO Box, expect a similar -9998 suffix; if it receives mail at a street address, the last four digits will point to the street segment or building. The county shown in the lookup is the USPS county assignment for that ZIP, which is useful when a license or permit form asks for the county.

Use a current address source

The USTA announced on December 22, 2025 that the 2026 graded stakes program grew to 179 graded stakes and 164 restricted stakes. The 2026 schedule began on Thursday, April 23 with four $75,000 finals of the Restricted 3 James K. Hackett Memorial at Miami Valley Raceway; the first open graded stake is the Grade 3 Dexter Cup at The Meadowlands on May 2 with an estimated $160,000 purse. A schedule is a good starting point, but it is not a postal record. Cross-check the track name from the schedule with the zipcodelookup.io result; if the track uses a business name that differs from the USPS-approved city name, use the city and state to find the correct ZIP value.

Avoid fake invalid-ZIP messages

USPS has cautioned that scammers imitate USPS with messages claiming a package could not be delivered because of an invalid ZIP code, then ask the recipient to scan a QR code. McAfee reported that the QR code leads to a fake USPS site requesting payment, login credentials, or personal information. If you receive a delivery alert about a ZIP problem, do not scan the code; delete it and check pending deliveries on the official USPS site rather than following the message.

When you also need race data from another country

If you are maintaining a list of harness racing venues and also want historical Nordic V64 results, the Swedish-language site V64 Resultat provides winning horses, drivers, and payouts. That is separate from U.S. postal lookup; for ZIP, county, and ZIP+4, stay with zipcodelookup.io.

Put the workflow into practice

As a repeatable method: open zipcodelookup.io, enter the city or the venue name, then read the five-digit ZIP, the plus-four line, and the county. Compare the returned address with the official USPS record before mailing. If you receive an invalid-ZIP alert, do not scan any QR code. This gives you a current USPS postal record for any named U.S. location, not just a racing track.