What Is Number Porting?
Number porting is the process of transferring your existing business phone numbers from one carrier to another. Federal regulations (governed by the FCC) give businesses the legal right to keep their phone numbers when switching providers—a principle called Local Number Portability (LNP).
This means you can switch to a better VoIP provider without losing the phone numbers your customers, partners, and vendors already know.
How the Number Porting Process Works
1. Letter of Authorization (LOA)
You sign a Letter of Authorization giving your new provider permission to request the transfer of your numbers. The LOA includes your account details with the current carrier, the numbers to be ported, and your authorized signature.
2. Port Request Submission
Your new provider submits the port request to your current carrier. This initiates the formal transfer process. The request must match your current carrier's records exactly—account name, address, and authorized contact must be accurate to avoid rejections.
3. FOC Date Assignment
If the port request is accepted, your current carrier assigns a Firm Order Confirmation (FOC) date—the scheduled date when the number transfer will occur. This typically happens 7-14 business days after submission for local numbers.
4. Number Activation
On the FOC date, the number is transferred to your new provider's network. Calls to your business number now route through your new VoIP system. The transition typically happens within a few minutes with no perceivable gap.
Porting Timelines by Number Type
| Number Type | Typical Timeline | Notes |
|---|---|---|
| Local Numbers | 7-14 business days | Most straightforward process |
| Toll-Free Numbers (800, 888, etc.) | 14-30 business days | Managed through the RespOrg system |
| Wireless Numbers | 5-10 business days | Wireless-to-VoIP porting is common |
| Complex/Multi-line Orders | 15-30 business days | Large orders may require coordination |
Common Reasons for Port Rejections
Port requests can be rejected by the current carrier. The most common reasons:
- Account information mismatch: Name, address, or account number doesn't match the carrier's records.
- Outstanding balance: Unpaid bills on the current account can block porting.
- Frozen account: Some carriers require you to "unfreeze" the number before porting.
- Incomplete LOA: Missing signatures or incorrect authorized contact information.
A good VoIP provider will catch these issues before submitting the port request, reducing the chance of rejection to near zero.
Tips for a Smooth Porting Experience
- Don't cancel your current service: Keep it active until porting is complete. Disconnected numbers cannot be ported.
- Verify account details: Confirm your account name and address match your current carrier's records exactly.
- Inventory all numbers: List every number—main lines, direct dials, fax lines, toll-free numbers.
- Plan for the FOC date: Ensure your new system is fully configured and tested before the transfer.
- Work with experienced porting specialists: Providers with dedicated porting teams handle edge cases and carrier-specific quirks efficiently.
VirPhone Makes Porting Effortless
VirPhone's dedicated porting team manages the entire process. We pre-validate all account information, handle carrier communications, track FOC dates, and ensure your numbers are live on your new system with zero gaps. Read our full porting guide or get started today.