Phone number validation for any country: valid and possible checks against allocated number ranges, E.164, international and national formatting, country and calling code, and line type (mobile, landline, VoIP, toll-free, premium rate, shared cost) with an SMS-capable hint. For signup, KYC, CRM cleanup, SMS and calling agents. National numbers accepted with a country code, e.g. 0612345678 with country=NL.

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