A free service where consumers can register

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CTPS: A similar service for businesses, allowing them to opt out of receiving unsolicited sales and marketing calls.
Exemptions generally include market research calls and calls from organizations with whom you have an existing relationship, provided you haven't opted out directly with them.

India (National Customer Preference Register - NCPR / National Do Not Call Registry - NDNC): Operated by the Telecom Regulatory Authority of India (TRAI). It allows subscribers to opt out of commercial communications by registering their numbers. Subscribers can choose full blocking or partial blocking based on categories (e.g., banking, real estate, education). Exemptions slovenia phone number list include calls from government bodies, emergency services, and some service providers.

Singapore (Do Not Call Registry): Managed by the Personal Data Protection Commission (PDPC). It applies to marketing messages sent via voice calls, SMS, and fax. Individuals can register for specific message types (e.g., voice calls only, SMS only). Exemptions include calls from organizations with an existing relationship (unless opted out) and messages for non-marketing purposes.

France (Bloctel): their landline and mobile phone numbers to stop unsolicited telemarketing calls. It explicitly excludes calls from political institutes, public service surveys, and calls for charitable donations.