Number Masking
A feature that hides the real phone numbers of both parties during a call, showing a proxy number instead.
Number masking (also called call masking or number anonymization) routes a call through a proxy number so that neither the caller nor the recipient sees the other's real phone number. Instead, both parties see a temporary or dedicated intermediary number assigned by the platform. After the call, the proxy number can be recycled or kept active for follow-up communications.
Number masking is widely used in marketplace and gig economy platforms — ride-hailing, food delivery, real estate, and healthcare — where businesses need callers and service providers to communicate without exposing personal contact details. It protects driver privacy from riders, patient privacy from providers, and agent privacy from customers, while maintaining full communication capability and call logging for the business.
Zonitel provides number masking as part of its virtual number and API capabilities. Businesses can programmatically create masked number pairs via the REST API, enabling automated workflows where two parties are connected through a proxy for a defined session duration. All masked calls appear in CDR reports with full metadata, maintaining auditability without compromising either party's privacy.