Country Calling Code API

About the Country Calling Code API

Pass any two-letter ISO country code to retrieve its international phone dialing codes, common name, and official name. Because some jurisdictions share or use multiple prefixes, calling codes arrive as an array. Add dialing=true for the international (exit) prefix on every plan. Paid plans add geographic region and subregion, plus the national trunk prefix, other regions that share the calling code, valid number lengths and example numbers for fixed-line, mobile and toll-free lines.

What people use it for

Signup Form Prepopulation

When users pick their nationality on signup forms, frontends populate the international phone prefix automatically to avoid input errors.

Contact Record Normalization

Clean customer address books by appending verified country dialing prefixes to local phone numbers stored with ISO country codes.

SMS Gateway Routing

To dispatch two-factor authentication alerts, messaging systems verify recipient phone prefixes against their registered account country.

Logistics Contact Sheets

Shipping platforms convert destination ISO codes into international dialing prefixes so couriers can contact international package recipients.

Ways to call it

One endpoint, many ways in — REST with JSON, XML, YAML and CSV, plus GraphQL and an MCP interface for AI agents.

JSON

Default REST response

XML

Markup format

YAML

Human-readable

CSV

Tabular export

Beta

GraphQL

Query language

New

MCP

For AI agents

How it compares

Side by side with the tools people weigh Country Calling Code against — what each one is better at, in plain terms.

Request parameters — GET /v1/callingcode

Sent in the query string. Premium parameters are accepted on every plan but only take effect on plans that include them. Anything not listed here is dropped rather than passed through.

Required

Optional

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curl "https://api.apiverve.com/v1/callingcode?country=FR&dialing=true" \
  -H "x-api-key: YOUR_API_KEY"

Authentication

Send your key in the x-api-key header. That is the only auth step — no token exchange, and no per-endpoint scope to configure.

Response — GET /v1/callingcode

Every APIVerve endpoint returns the same three top-level keys, so one response handler covers your whole integration: status, error and data. Only data changes shape.

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{
  "status": "ok",
  "error": null,
  "data": {
    "country": "France",
    "officialName": "French Republic",
    "countryCode": "FR",
    "callingcodes": [
      "+33"
    ],
    "region": "Europe",
    "subregion": "Western Europe",
    "dialing": {
      "internationalPrefix": "00",
      "nationalPrefix": "0",
      "sharedWith": [],
      "possibleLengths": {
        "fixedLine": [
          9
        ],
        "mobile": [
          9
        ],
        "tollFree": [
          9
        ]
      },
      "exampleNumbers": {
        "fixedLine": {
          "international": "+33 1 23 45 67 89",
          "national": "01 23 45 67 89",
          "e164": "+33123456789"
        },
        "mobile": {
          "international": "+33 6 12 34 56 78",
          "national": "06 12 34 56 78",
          "e164": "+33612345678"
        },
        "tollFree": {
          "international": "+33 801 23 45 67",
          "national": "0 801 23 45 67",
          "e164": "+33801234567"
        }
      }
    }
  }
}

Response fields

Paths are relative to data. Premium fields are absent rather than zeroed on plans that do not include them, so check for presence instead of comparing to 0.

Response headers

Every response carries your balance, so your own code always knows where it stands without polling anything. All four are exposed to browsers through CORS.

Errors

Read the HTTP status first, then error for the specific reason. The body names the parameter that has to change.

What a call costs — 1 credits per call

Credits are shared across every APIVerve API — one balance, one key, one bill. Failed requests never count against it, so a rejected input costs nothing.

Calls are what the credits buy at this API's rate — spend them here, on any of the other APIs, or across both. Nothing is reserved per endpoint.

Zero-code embed — one snippet, no backend

Drop an interactive Country Calling Code form onto any page. The widget calls the API for you, so no key ever appears in your markup and there is nothing to deploy.

Changelog — Country Calling Code API

Every change to this endpoint, newest first. Breaking changes ship as a new version and the previous one keeps serving — response fields are added, never removed or retyped in place, so an integration written against v1 keeps working.

Currently v1