How do virtual numbers fit into France’s CNIL regulations on personal data processing?

Virtual numbers fall under CNIL regulations as personal data when linked to individuals; compliance requires transparency, lawful processing, and security safeguards.

CNIL and the Definition of Personal Data

The Commission Nationale de l’Informatique et des Libertés (CNIL) is France’s independent data protection authority responsible for enforcing the General Data Protection Regulation (GDPR) and local laws on personal data processing. CNIL's mission is to protect individuals' privacy and ensure lawful handling of personal data by organizations.

Under CNIL and GDPR, personal data is defined as “any information relating to an identified or identifiable natural person.” This includes direct identifiers like names or phone numbers, as well as indirect identifiers that can be combined to identify someone.

Are Virtual Numbers Personal Data?

Virtual numbers are telephone numbers that are not directly associated with a physical SIM card or device but route calls or SMS through cloud-based telephony services. They are widely used for SMS verification, marketing, and communication platforms.

When virtual numbers can be linked to a specific individual—such as when used for SMS-based authentication or customer contact—they are considered personal data under CNIL. Conversely, if a virtual number is used in a way that it cannot identify a person, it may fall outside strict personal data regulations, but this is rare in practice.

Key CNIL Requirements for Processing Virtual Numbers

Processing virtual numbers as personal data requires compliance with CNIL’s core principles:

• Lawfulness, fairness, and transparency: Inform users clearly about the data collection and its purpose.
• Purpose limitation: Use virtual numbers only for specific, explicit, and legitimate purposes.
• Data minimization: Collect only the virtual number data necessary for the intended use.
• Accuracy: Keep the virtual number data accurate and up to date.
• Storage limitation: Retain virtual numbers only as long as needed.
• Integrity and confidentiality: Implement appropriate security measures to protect virtual number data.

Respect user rights including access, rectification, deletion, and objection regarding their virtual number data.

Responsibilities of Third-Party Virtual Number Providers

Third-party virtual number providers like SMSVerifier act as data processors or joint controllers depending on context. CNIL expects these providers to:

• Ensure GDPR-compliant contracts and data processing agreements with clients.
• Maintain technical and organizational measures for data security, such as encryption and access controls.
• Support clients in enabling user rights like data access and deletion.
• Document data flows and notify CNIL of any breaches involving virtual numbers promptly.

Clients using these services remain responsible for lawful processing under CNIL.

Best Practices to Comply with CNIL Using Virtual Numbers

Risks of Non-Compliance with CNIL

Failure to comply with CNIL regulations when handling virtual numbers can result in severe consequences:

• Financial penalties up to €20 million or 4% of global turnover.
• Reputational harm and loss of user trust.
• Mandatory audits and operational restrictions.
• Potential legal actions from data subjects.