Check whether a Hong Kong SAR China number is valid, detect its line type, and convert it to E.164, international, or national format — instantly and free. Powered by Google's libphonenumber.
| Country | Hong Kong SAR China (HK) |
| Country calling code | +852 |
| Example number (international) | +852 5123 4567 |
| National format | 5123 4567 |
| E.164 format | +85251234567 |
| RFC 3966 (tel: URI) | tel:+85251234567 |
| Example line type | mobile |
To dial a Hong Kong SAR China number from abroad, start with the country code +852 followed by the national subscriber number. In E.164 — the format every SMS gateway, CRM, and payment provider expects — the same number is stored as +85251234567: a leading +, the country code, and the national number with no spaces or separators.
The interactive tool above runs entirely in your browser. For server-side validation at scale — sign-up forms, lead cleaning, SMS routing — call the API. One GET request, no SDK, works in any language.
# Validate a Hong Kong SAR China number via the API curl "https://phone-validation-and-formatting.p.rapidapi.com/v1/validate?number=%2B85251234567" \ -H "X-RapidAPI-Key: YOUR_KEY" \ -H "X-RapidAPI-Host: phone-validation-and-formatting.p.rapidapi.com"
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The country calling code for Hong Kong SAR China is +852. A full number in international (E.164) form looks like +85251234567.
A typical Hong Kong SAR China mobile number is written +852 5123 4567 internationally, 5123 4567 nationally, or +85251234567 in E.164 format.
Send one GET request to the Phone Validation API with the number and country code "HK". The response tells you whether it is valid, the line type, and every standard format. A free tier is available.
Validity, line-type detection, and every format from a single endpoint — 240+ countries, sub-50ms from the edge.
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