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NumValidate

Phone number validation REST API. Simple, Free, and Open Source.

5 Alternatives To NumValidate

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Antideo

Email, IP address and phone number validation API service

DeBounce

Email Validation, Email Checker, Data Enrichment and Appending Tool. Using DeBounce remove invalid, disposable, spam-trap, syntax and deactivated emails.
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RealPhoneValidation

Realtime API and Batch Phone Validation

Unbounce

Unbounce lets marketers build, publish and test landing pages without IT or software. A/B testing and lead gen make it a powerful marketing tool.

Veriphone

Phone number validation & carrier lookup