How to Port Your Business Phone Numbers (Without Losing a Single Call)

Your business phone numbers are brand assets. They’re on your business cards, your website, your Google Business profile, your signage, and in the memory of every customer who has ever called you. Losing them when switching phone carriers is not an option — and with proper planning, you won’t have to.

Number porting (also called LNP, Local Number Portability) is the process of transferring your existing phone numbers to a new carrier while keeping those numbers active. It’s a legal right in Canada and the United States. Every carrier must participate in the porting ecosystem. But the process has enough complexity and potential for delay that it’s worth understanding thoroughly before you initiate it.

How Porting Works

The process involves your new carrier (gaining carrier) submitting a port request on your behalf to your current carrier (losing carrier). The losing carrier validates the request, releases the number, and the number is activated on the new carrier’s network.

In Canada, porting is coordinated through the Canadian Number Portability Consortium (CNPC) and typically takes:

• Local numbers (geographic DIDs): 3–7 business days for a straightforward port
• Toll-free numbers: 5–10 business days
• Large number blocks: 2–4 weeks, sometimes longer
• Complex situations (numbers on a POTS line being ported to VoIP): 2–4 weeks

What You Need to Submit a Port Request

Your new carrier will need documentation to initiate the port:

• Account information with your current carrier: Account number, billing address as it appears on the account, the account PIN or password if applicable
• The exact numbers to port: Listed as they appear on your current bill, including the country code
• A Letter of Authorization (LOA): A signed document authorizing the new carrier to initiate the port on your behalf

The most common cause of port rejection is a mismatch between the information you submit and the information your losing carrier has on file. Check your current bill carefully and use exactly the address and account details shown there.

The Most Common Porting Mistakes

Canceling your old account before the port completes. This is the most catastrophic mistake. Once you cancel your account with your current carrier, they may release the number back to the pool, and it could be assigned to someone else. Never cancel your old account until every number has successfully ported and been confirmed active on the new system.

Letting account contracts expire. Some carriers impose porting fees or delays for accounts under contract. Know your contract status before initiating.

Not porting all numbers on an account. If multiple numbers are associated with the same account, some carriers require all numbers on the account to port together or to cancel the remaining numbers first.

Ignoring numbers you didn’t know existed. Run a complete number audit before porting. You don’t want to discover a fax line or legacy number during the port process.

Running in Parallel: The Safe Approach

The safest porting strategy for business-critical numbers is a parallel-run period:

1. Configure your new phone system with temporary DIDs
2. Train staff on the new system using temporary numbers
3. Initiate the port for your real numbers
4. When the port completes, the real numbers activate on the new system seamlessly
5. Your old system continues working until the port is confirmed complete
6. Cancel the old account only after confirming all numbers are live

This approach ensures that callers continue reaching you on your real numbers throughout the transition, and that the new system is fully operational before any real traffic hits it.

After the Port: Verify Everything

Once your carrier confirms port completion:

• Call each ported number from an external phone
• Test inbound routing for each number
• Confirm voicemail is working
• Verify emergency services routing (911) is correctly configured
• Update your Google Business profile and website if numbers changed during the parallel period

Porting is one of those processes where patience and attention to detail pay off. Rushed ports with incomplete documentation are the ones that cause problems. Planned ports with proper parallel-run periods are essentially invisible to your customers.