What is Virtual Phone Number?
A phone number that isn't tied to a physical SIM card or phone line — used for privacy-conscious communication, separating personal and business identities, protecting your real number from data brokers, and providing a layer of anonymity for online signups.
Also known as: VoIP Number, Privacy Phone Number, Burner Number, Secondary Phone Number
Your phone number is one of your most exploitable identifiers — it's linked to your real identity via your carrier, used for two-factor authentication, sold by data brokers, and increasingly used for identity verification. A virtual number creates a buffer.
Why You Need a Virtual Number
Your Real Number Is Everywhere
- Data brokers sell it alongside your name and address
- Every app you sign up for collects it
- Reverse phone lookup instantly reveals your identity
- SIM swapping attacks target real carrier numbers
- Robocallers and scammers buy phone number lists
Use Cases
- Online signups — Use a virtual number for services, keep your real number private
- Business — Separate business and personal communications
- Dating apps — Don't give your real number to strangers
- Craigslist/marketplace — Protect your identity when selling
- Two-factor authentication — Reduces SIM swap risk for less critical accounts
- Travel — Maintain a US number while abroad
Virtual Number Options
Privacy-Focused
| Service | Privacy Level | Cost | Notes |
|---|---|---|---|
| MySudo | High | $0.99-$14.99/mo | Up to 9 separate identities ("Sudos") |
| Hushed | High | $3.99-$7.99/mo | Disposable or long-term numbers |
| Burner | Medium | $4.99/mo | Auto-rotating temporary numbers |
| Silent.link | Very High | Pay with crypto | Anonymous eSIM, no KYC |
Mainstream (Less Private)
| Service | Privacy Level | Cost | Notes |
|---|---|---|---|
| Google Voice | Low | Free | Tied to Google account |
| TextNow | Low | Free (ads) | Ad-supported |
| Skype | Low | $3-6/mo | VoIP number |
Important Limitations
- Not all services accept VoIP numbers — Some banks and platforms detect and block virtual numbers for verification
- Google Voice requires a real number to set up (not truly anonymous)
- SMS 2FA with virtual numbers has limitations — some security services detect VoIP
- For maximum privacy: Use a prepaid SIM purchased with cash, or a service like Silent.link that accepts cryptocurrency
Setup Strategy
- Keep your real number for banking, government, and close contacts only
- Get a virtual number for all online signups and services
- Use email aliases (SimpleLogin) alongside virtual numbers for complete separation
- Consider MySudo for multiple isolated identities (personal, business, shopping)
- For high-risk situations: Silent.link eSIM + ProtonMail + VPN = minimal identity linkage
Related Terms
Anonymous LLC
A limited liability company formed in a state that does not require member or manager names in public filings, combined with a professional registered agent as the public address — so the real owner's identity is absent from the state's public record from day one.
Burner Phone
A prepaid mobile phone intended for temporary use and easy disposal, typically purchased with cash to avoid identity linking. Used for privacy-sensitive communications where the phone and SIM can be discarded after use.
Caller ID Spoofing
The practice of falsifying the phone number displayed on a recipient's caller ID to disguise the caller's identity — used by scammers to impersonate banks, government agencies, and known contacts to trick victims into answering and sharing information.
SIM Swapping
A social engineering attack where an attacker convinces a mobile carrier to transfer your phone number to their SIM card, hijacking SMS-based authentication.
Two-Factor Authentication
A security method requiring two different types of identification to access an account: something you know (password) plus something you have (phone, hardware key) or something you are (biometric). This significantly reduces the risk of unauthorized access even if your password is compromised.
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