How to Port Your Business Phone Number to VoIP

What Is Number Porting?

Number porting is the process of transferring your existing phone number from one carrier to another — in this case, from your traditional phone provider to a VoIP service. You keep the same number; only the underlying infrastructure changes.

This is a legal right in most countries. In the US, the FCC mandates that carriers allow number porting under the Local Number Portability (LNP) rules. Your current provider cannot refuse a legitimate porting request.

Why Port Instead of Getting New Numbers?

Your business phone number is a brand asset:

• Customers, partners, and vendors already have it
• It's printed on business cards, websites, and marketing materials
• Changing numbers means updating every directory listing, Google Business Profile, and advertisement
• Customers who call your old number reach a dead line — lost business

Porting lets you move to VoIP without any disruption to your callers.

The Porting Process Step by Step

Step 1: Gather Your Current Account Information

You'll need to provide your new VoIP provider with details about your existing phone service:

• Account number with your current carrier
• Account holder name (must match exactly)
• Service address on file with the current carrier
• PIN or passcode (some carriers require this for porting authorization)
• Phone numbers to be ported (list every number, including fax lines)
• Current carrier name

Tip: Call your current provider and ask for a "Customer Service Record" (CSR). This document contains all the information you need in one place.

Step 2: Submit the Port Request

Your new VoIP provider handles the actual porting process. You'll typically:

1. Fill out a Letter of Authorization (LOA) — a form that authorizes the transfer
2. Provide the account information from Step 1
3. Sign the LOA (electronic signature is usually accepted)
4. Submit to your new provider

Step 3: Wait for Processing

The porting process involves coordination between your old carrier, your new provider, and sometimes a third-party porting administrator.

Typical timelines:

• Wireless numbers — 1–3 business days
• Landline numbers — 5–10 business days
• Toll-free numbers — 3–7 business days
• Complex ports (multiple numbers, T1/PRI circuits) — 10–20 business days

Step 4: Confirm the Port

On the scheduled port date:

1. Your number switches to the new VoIP provider
2. Incoming calls start routing through your new system
3. Verify by calling your number from an external phone
4. Test inbound and outbound calling
5. Confirm caller ID shows correctly

Step 5: Cancel Old Service (After Verification)

Do NOT cancel your old phone service before the port completes. Canceling prematurely can release your number back to the carrier's pool, and you could lose it permanently.

Once the port is confirmed and tested:

1. Verify all numbers are working on the new system
2. Run parallel for 24–48 hours if possible
3. Then cancel the old service
4. Return any leased equipment to avoid charges

Common Porting Issues and How to Avoid Them

Rejection: Account Information Mismatch

The most common porting failure. The name, address, or account number on your LOA doesn't exactly match what your current carrier has on file.

Fix: Get a CSR from your current carrier and copy the information exactly — including middle initials, suite numbers, and abbreviations.

Rejection: Outstanding Balance

Some carriers reject ports if there's an unpaid balance on the account.

Fix: Pay any outstanding balance before submitting the port request.

Rejection: Account Has a Freeze

A "port freeze" or "number freeze" is a protection that prevents unauthorized porting. You may have enabled it without realizing it.

Fix: Call your current carrier and ask them to remove the port freeze. You may need to verify your identity.

Delay: Complex Port

If you're porting numbers from a PRI (T1) circuit, porting multiple numbers across different rate centers, or dealing with a carrier that moves slowly, expect delays.

Fix: Start the porting process early. Don't wait until you need to be live on the new system tomorrow.

Partial Port

If you have multiple numbers on one account, you can port some and keep others. This is called a "partial port" and is slightly more complex.

Fix: Clearly specify which numbers to port and which to leave on the LOA.

What Happens to Your Old Service During Porting?

During the porting process, your existing phone service continues to work normally. Callers can still reach you at your current number. There's no downtime during the waiting period.

On the actual port date, there may be a brief window (usually a few minutes to an hour) where calls might not connect while the routing switches over. Schedule the port for a low-traffic period if possible.

Porting Costs

Most VoIP providers, including Softphone Plus, don't charge incoming porting fees. Your old carrier may charge a small outgoing port fee, but they're legally required to allow the port regardless.

After the Port: Next Steps

Once your numbers are successfully ported:

1. Update any DID routing in your VoIP platform to point ported numbers to the correct agents or groups
2. Enable call recording on the ported numbers
3. Test caller ID — make outbound calls and verify your business number displays correctly
4. Update any auto-attendant greetings with your business name
5. Verify 911/E911 registration — ensure your emergency calling is configured for the new service

Ready to Port?

Number porting sounds complex, but your VoIP provider does most of the work. Your job is to provide accurate account information and authorize the transfer.

Start your free trial with Softphone Plus, set up your team while the port is in progress, and go live the day your numbers arrive — with call recording, analytics, and management already configured.