What City Is That ZIP Code? Free Worldwide Lookup Guide
A form rejects your address, a package label shows a code you do not recognize, or you simply want to know where a postal code points on the map. Postal codes pack a surprising amount of information, but most lookup sites either charge, demand a signup or only cover one country. The free ZIP Code Lookup resolves any postal code across 70 countries to its city, region and coordinates in seconds, powered by the free Zippopotam API.
You pick the country, type the code and get an instant detail card with latitude and longitude, a one-click Google Maps link and an honest timezone note. If you have a whole list to resolve, the bulk ZIP to city converter handles up to 50 codes at once, and the ZIP distance calculator measures the miles between any two codes.
How do you find what city a postal code belongs to?
Pick the country from the dropdown, then type the postal code and click Look up or press Enter. The tool queries the free Zippopotam API and returns the place name (city), state or region, and coordinates instantly. For example, US 90210 resolves to Beverly Hills, California, with a one-click Google Maps link.
The detail card is built for verification work. E-commerce teams check customer entries, researchers geocode survey responses, travelers pin a destination before they fly, and individuals simply want to confirm an address looks right. The coordinates make the result map-ready, which is why the one-click Google Maps link is there: one tap shows you exactly where the code sits.
Invalid codes get a clear not-found message naming the country rather than a guess. That honesty matters, because a lookup that invents a city for a typo is worse than no lookup at all. If a code fails, double-check the format first: transposed digits, ZIP+4 extensions and missing UK inward parts cause most failures, and the country dropdown is worth re-checking when a code looks valid but will not resolve.
What can you learn from a postal code?
A postal code identifies the delivery area: the city or place name, the state or region, and the approximate latitude and longitude of that area. Businesses use this for shipping zones, tax estimation and service-area checks, while individuals use it to verify addresses. It cannot reliably tell you the time zone, since some regions span two zones.
The coordinates are the underrated part of the result. Latitude and longitude turn a postal code into something you can plot, measure from or feed into a radius search. That is exactly what the companion distance calculator does: it takes two looked-up codes and computes the miles between them with the haversine formula. The chain from lookup to distance is one of the most practical workflows on the site.
What a postal code cannot reliably tell you matters just as much. It is not a time zone, it is not always a county, and it says nothing about demographics or delivery speed. Treat it as what it is: a postal routing code that maps to a delivery area. For everything else, combine it with proper sources instead of assuming.
Why does my postal code show the wrong city?
Many postal codes cover multiple place names, and the database returns the primary one. Your mailing address city can differ from the primary place name while the code itself is correct, which is normal postal behavior and nothing to worry about. If mail delivers correctly, the code is right.
The lookup shows the canonical place name from the database, which is the primary entry for that code. Your mailing address may use a different accepted city name for the same code, and that is normal postal behavior. As long as mail delivers correctly, the code itself is right, even when the label on the card does not match your envelope.
This also explains why the tool is a checker, not an address validator. It confirms the code exists and tells you where it points; it cannot confirm your street address belongs to that code. For checkout forms and shipping labels, use the lookup to sanity-check the city, then verify the full address with the carrier or postal service.
What should you do when a postal code lookup fails?
The usual causes are transposed digits, extensions pasted as one entry such as ZIP+4, a format that does not match the selected country, or codes that were discontinued or never assigned. The tool reports each failure honestly instead of guessing, so you know exactly which entries to fix and re-run rather than trusting a fabricated city.
The honest-error design is deliberate. Some free databases fake a result when they have none, which poisons spreadsheets and decisions downstream. This tool surfaces real API errors per lookup, tells you which country was searched, and for the distance calculator even refuses to compute when a code's coordinates are invalid in the source data. No result beats a fabricated one.
A practical recovery sequence: first strip extensions like ZIP+4 down to the base code, then check for transposed digits, then confirm you picked the right country, and finally verify the format for that country (UK postcodes need both parts, Canadian codes need the letter-digit pattern). Most failures resolve within that checklist.
How to use the ZIP Code Lookup in 4 steps
- Pick the country. Choose from the dropdown; the United States is the default, and 70 countries are available.
- Type the postal code. Enter it exactly as written and click Look up or press Enter. Try the sample button with 90210 to see a full result.
- Read the detail card. The city, state or region, latitude and longitude, and country appear instantly with no page reload.
- Open the map or check the time note. Click the Google Maps link to see the location, and use the timezone note to verify local time instead of guessing.
6 practical tips
- Confirm the country first. A code that looks valid but fails usually belongs to a different country's format. Re-check the dropdown before debugging the code.
- Strip ZIP+4 extensions. Enter 90210, not 90210-1234. Extensions pasted as one entry are one of the top causes of not-found errors.
- Complete UK postcodes. A UK postcode needs both the outward and inward parts. A partial code will not resolve.
- Use the Maps link for confidence. One click shows where the code actually sits, which settles doubts faster than comparing city names.
- Chain into the distance tool. Look up two codes, then measure the miles between them with the ZIP distance calculator.
- For lists, go bulk. More than a handful of codes? The bulk converter resolves up to 50 at once with a CSV download.
Frequently asked questions
Is this ZIP code lookup really free?
Yes. Look up as many postal codes as you like across 70 countries with no account and no limits. It runs on the free Zippopotam API, which needs no key, and every real error is surfaced honestly instead of hidden behind invented data.
Which countries are supported?
Seventy countries, including the United States, Pakistan, the United Kingdom, India, Canada, Australia, Germany and France. Pick any of them from the country dropdown; the list follows Zippopotam's public country table, and the United States is the default.
What information does a postal code lookup return?
The city (place name), state or region name and its abbreviation, latitude and longitude, the country, plus a one-click Google Maps link centered on the code's coordinates. You also get an honest timezone note instead of a guessed zone.
What if the postal code is not found?
You get a clear not-found message naming the country. The usual causes are transposed digits, ZIP+4 extensions pasted as one entry, and missing inward parts in UK postcodes. Fix the format and try again.
Does a postal code tell me the time zone?
Not reliably. Postal codes do not store time zones, and some regions span two zones, so the tool links you to a world clock to confirm local time instead of guessing. Never schedule across zones on a postal code alone.
Where does the data come from?
The free Zippopotam API, which serves public postal data for dozens of countries with no key required. A few database rows carry invalid coordinates, and the tool reports those honestly instead of plotting a fake location.
Ready to try it yourself? It's free, no signup required.
Try the free ZIP Code Lookup →