A virtual phone number (virtual number) is a phone number managed in the cloud without being tied to a physical telephone line. Incoming calls are received via the internet and can be forwarded to any configured device (smartphone, PC, landline). Built on VoIP technology, it can be used regardless of location.
Business applications are diverse. Acquiring virtual numbers with regional area codes to project a local presence, assigning different numbers to each advertising channel to measure response rates (call tracking), and adding temporary reception numbers only during peak seasons. Numbers can be added or removed online instantly, eliminating the need to wait for physical line installation.
For personal use, virtual numbers can protect privacy by avoiding exposure of your real number. Using virtual numbers for flea market app transactions or online service registrations reduces the risk of your personal mobile number being exposed.
The typical fee structure is a monthly base fee (several hundred to several thousand yen per number) plus per-call charges. 050 numbers are relatively inexpensive to acquire, while numbers with area codes like 03 or 06 are somewhat more expensive. Often provided as part of cloud PBX services, they can be combined with IVR and call recording features. Note that virtual numbers may not support emergency calls (110/119), so it's wise to use them for specific purposes rather than as your primary number. Promptly cancel unused numbers to control costs. Review detailed applications in virtual phone numbers for business.