NewConnect Claude, Gemini, ChatGPT, and other AI agents to API Ninjas via our MCP server →

Singapore Postal Code API

Look up any Singapore postal code and get the city, region and coordinates back as JSON. Singapore calls the code a postal code, and 238823 in Singapore is a typical one.

This is the Postal Code API scoped to Singapore. Pass country=SG along with a postal_code to any endpoint call.

Coverage

We publish exactly what we hold for Singapore, so you can check before you build.

  • Postal Codes available121,135
  • GranularityFull code
  • Codes with a region0%
  • Coordinates from a true centroid0%

The remaining coordinates are derived from a gazetteer match or estimated from neighbouring codes, so we publish the split rather than implying uniform precision.

Other countries

The same endpoint covers over 100 countries. A few with dedicated pages:

United Kingdom Postcode · India PIN Code · Australia Postcode · Indonesia Kode Pos · Germany PLZ · Netherlands Postcode · Malaysia Poskod · France Code Postal · Japan Yubin Bango · South Korea Postal Code

For United States ZIP codes, use the Zip Code API.

Try it

country
postal_code

Response

JSON
[
    {
      country:"SG",
      postal_code:"238823",
      city:"Singapore",
      region:"...",
      lat:"...",
      lon:"..."
    }
]

Code Examples

1 2 curl -X GET "https://api.api-ninjas.com/v1/postalcode?country=SG&postal_code=238823" \ -H "X-Api-Key: YOUR_API_KEY"

Frequently Asked Questions

  • Yes, but you must have a premium subscription. Commercial use of the Postal Code API is not permitted on the free tier. See our pricing page to choose a plan that fits your needs.
  • Sign up for a free account to instantly get your API key, then pass it in the X-Api-Key header on every request. The documentation above includes ready-to-run examples in cURL, Python, JavaScript, Node.js, and more.
  • Your API requests will simply be denied once you hit your monthly quota — you will never be charged more than the plan you signed up for. To increase your quota, you can upgrade your plan any time on our pricing page.
  • The API responds with a standard HTTP status code and a JSON error message describing the problem. See our error codes reference for the full list of codes and how to resolve each one, or contact support if you need help.
  • The API covers over 100 countries. Pass a two-letter ISO 3166-1 country code to the country parameter along with a postal_code. Coverage varies by country, and we publish a per-country manifest showing the exact number of codes, the data source, and whether coverage is complete or partial, so you can check before you build. For US ZIP codes, use the Zip Code API.
  • Pass the country and postal_code parameters, for example country=GB&postal_code=SW1A1AA. Formatting is flexible: spaces, hyphens and country prefixes are normalized, so 1011AB and 1011 AB both resolve, as do L-4968 and 4968 for Luxembourg. Review possible error codes if a lookup returns no match.
  • Each object includes country, the normalized postal_code, city, region, and the IANA timezone. Paid plans additionally return region_code, county, county_code, lat and lon. The area_code field is available for Canada only; for US ZIP codes use the Zip Code API. To turn coordinates into a full address, pair this with the Geocoding API.
  • Yes. Supply the city or region parameter instead of a postal code to find every code in that area. These are premium-only inputs available on the paid plans listed on our pricing page.
  • Around 68 countries and territories, including the United Arab Emirates, Hong Kong, Macau, Qatar and Panama, operate no postal code system at all. Rather than returning an empty result, the API responds with has_postal_codes: false and a short explanation, so your address forms can skip the field instead of failing validation.
  • Canadian lookups remain the default when no country parameter is supplied, and the province parameter is still accepted as an alias for region, so existing integrations continue to work unchanged.