

Validate phone numbers globally.
Phone Validation API is a free Phone API that requires apiKey authentication, is served over HTTPS and supports CORS, so it can be called from the browser.
Validate any phone number in real time and get its carrier, line type, and location. 100 free requests at signup, no credit card required. Start for free.
Details from abstractapi.com.

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The Phone Validation API is provided by Abstract (abstractapi.com). Validate any phone number in real time and get its carrier, line type, and location. 100 free requests at signup, no credit card required. Start for free.
Yes. The Phone Validation API is listed in the Phone category of the public-apis directory, which only includes APIs that are free or have a free tier. Check its documentation for rate limits and paid plans.
Yes. The Phone Validation API uses apiKey authentication, so you need to register for credentials before making requests.
Yes. The Phone Validation API supports CORS, so front-end JavaScript can call it directly.
Yes. The Phone Validation API is served over HTTPS, so it's safe to use in production.