PostalCodeCheck API alternatives

City, region and coordinates for 887,000+ postal codes across 95 countries. If it doesn't fit your project, here are the 10 best free Geocoding APIs to use instead in 2026, out of 110 in the directory.

For reference, PostalCodeCheck API: No API key needed · Callable from the browser (CORS) · HTTPS.

1. 1

   ipwhois API

   Online · 226 ms

   IP geolocation with country, city, coordinates, ISP, timezone and flag data.

   • No API key needed
   • Fast: 226 ms response
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
2. 2

   administrative-divisons-db API

   Online · 745 ms

   Get all administrative divisions of a country.

   • No API key needed
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
3. 3

   HackMyIP API

   Online · 1047 ms

   IP geolocation, ISP and privacy/VPN scoring, email breach checks, DNS and WHOIS lookups.

   • No API key needed
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
4. 4

   ipapi.co API

   Online · 780 ms

   Find IP address location information.

   • No API key needed
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
5. 5

   LatLng API

   Online · 431 ms

   Geocoding, reverse geocoding, places, and static maps.

   • No API key needed
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
6. 6

   Moradas API

   Online · 519 ms

   Portuguese address autocomplete and 7-digit postal codes (CP7).

   • No API key needed
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
7. 7

   Nominatim API

   Online · 637 ms

   Provides worldwide forward / reverse geocoding.

   • No API key needed
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
8. 8

   Postali API

   Online · 570 ms

   Mexico Zip Codes API. A free geocoding API by Postali.

   • No API key needed
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
9. 9

   Postcodes.io API

   Online · 626 ms

   Postcode lookup & Geolocation for the UK.

   • No API key needed
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
10. 10

    REST Countries API

    Online · 1028 ms

    Get information about countries via a RESTful API.

    • No API key needed
    • Callable from the browser (CORS)
    • HTTPS

    No authHTTPSCORS

PostalCodeCheck API vs alternatives

PostalCodeCheck API compared with its alternatives

API	API key	HTTPS	CORS	Uptime	Response	Rating
PostalCodeCheck	No	Yes	Yes	Up	515 ms	Not rated
ipwhois	No	Yes	Yes	Up	226 ms	Not rated
administrative-divisons-db	No	Yes	Yes	Up	745 ms	Not rated
HackMyIP	No	Yes	Yes	Up	1047 ms	Not rated
ipapi.co	No	Yes	Yes	Up	780 ms	Not rated
LatLng	No	Yes	Yes	Up	431 ms	Not rated
Moradas	No	Yes	Yes	Up	519 ms	Not rated
Nominatim	No	Yes	Yes	Up	637 ms	Not rated
Postali	No	Yes	Yes	Up	570 ms	Not rated

See also: best Geocoding APIs · all Geocoding APIs