How to Find Zip Codes and Area Codes Online

Zip Code & Area Code Finder Tools

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Zip codes and postal codes are numerical codes used to facilitate mail delivery, and area codes are used for specifying a geographical region when calling a phone number. Rather than flipping through a large, unwieldy telephone book, you can find and verify zip codes and area codes on the web quite easily.

How to Find a Zip Code

If you have an address or partial address, you can find the zip code through USPS Zip Code Lookup, a tool on the US postal service's website. You can also search by city or state, or find all cities that are part of a particular zip code.

USPS zip code finder

The International Post Codes site, maintained by Columbia University, has an extensive index of domestic and international postal codes, in addition to mailing acronyms, policies, and best practices.

You can also use various search engines to find zip codes. With Google, for example, to do a zip code search by address, type what you know of the address to see a map of the location with the zip code included.

Google's zip code finder

You can even type something like South Laurel MD zip code to see all of them for that area (and to find links that show a full list of zip codes for that region). You can also enter a zip code to see the geographic location it belongs to as well as a map and other related web results, such as cities that use that zip code.

If you don't append zip code to the end of the search, Google might show unrelated information. For example, a search for 90210 reveals information about the TV series, whereas 90210 zip code shows information on the zip code.

You can find a zip code with DuckDuckGo, too. Type in a zip code and DuckDuckGo returns a map, the location of the zip code, weather, real estate, and other pertinent web results.

zip code information found in DuckDuckGo

A zip code lookup on Bing brings back what city/locale it pertains to, maps, and local attractions, such as grocery stores, hotels, and movie theaters. If you type a partial address, Bing completes it for you and reveals the zip code.

Bing zip code finder

How to Find an Area Code

Much like with a zip code, you can use a search engine to find an area code by searching for the city. To do the reverse and figure out what part of the country an area code is related to, just enter the area code into the search engine.

To find an area code with Google, type the name of the city and state you're looking for, followed by the words area code. You'll usually find what you need. For international listings, search for a phrase such as Kenya calling code, and you'll receive an informative answer with the numbers you'll need to make a call into that nation.

area code search on Google

Enter the city and state in a new Bing search and you'll more than likely see Google-like results that show you the area code at the very top of the results. The same is true for international calling codes.

searching for area codes with Bing

Another way to find an area code online is with Wolfram Alpha, which bills itself as "Computational Intelligence." This data-based search engine doesn't display results like the others mentioned on this page, but with a little digging, you can find some unique information about cities and states that you might not find on another search engine.

Wolfram Alpha area code search

Using Yahoo to find an area code is much like using Google; just enter the city and state name followed by area code, and you'll get an instant result. Finding international codes isn't as easy with Yahoo as it is with Google, but you can, of course, still use Yahoo to find other websites that can give you that information.

Yahoo area code finder tool

Quite a few sites specialize in finding area codes that a simple search engine query might not reveal. You can use these free resources to find nearly any area code and/or country calling code in the world:

  • Area Codes: Features area codes from mostly the United States, though other countries are scattered through here as well.
  • BT Phonebook: Use this site to find area codes in the U.K.
  • Country Codes: This site asks you what country you're calling from and to in order to assign the correct country code, area code, or both.
  • LincMad: A zip code map that offers a visual representation of area codes in the United States and Canada.
  • AllAreaCodes.com: Similar to LincMad, you get a full area code map of the US and Canada, but also links to region-specific area code lists, details about the area codes (e.g., wireless or landline, carrier, when it was introduced), search tools, and printable area code lists.