Number Porting Australia: Complete Step-by-Step Guide (2026)

Number porting in Australia is the process of transferring your existing phone number from one telecommunications provider to another, keeping the number intact. For Australian businesses, porting is regulated under the ACMA's Telecommunications Numbering Plan and administered through the Communications Alliance. This guide covers the complete porting process: what category your port falls into, the realistic timelines for each, what paperwork you need, why ports get rejected, how to stay reachable during the cutover, and what your rights are if a provider drags their feet. By the end you will know exactly what to do, what to watch for, and what you are legally entitled to.

What Is Number Porting? (Plain English)

Your phone number does not belong to your provider. It belongs to you. This is a fundamental right under Australian telecommunications law. Number porting is simply the process of exercising that right: transferring your number to a new carrier while keeping the same digits.The number you have been using for years, the one printed on your business cards, your website, your Google Business Profile, and in the memory of every existing customer, is portable. The process is routine. Providers handle hundreds of ports per week. The industry has a standardised technical process for it, and most ports go through without drama.What trips people up is not the technology. It is paperwork errors, account detail mismatches, and choosing a provider that does not communicate clearly about what is happening. This guide covers all of it.

Cat A vs Cat C Porting: Which One Applies to You?

Australian number porting is classified into two main categories. Which category your port falls into determines the timeline and the complexity of the process. If you are moving a single geographic number from your ISP's bundled broadband phone service to a standalone VOIP provider, that is almost always Category A. If you are moving a block of numbers, a 1300/1800 number, or a legacy ISDN service, expect Category C timelines. When in doubt, ask your new provider to confirm the category before you start.

Step-by-Step: How to Port Your Business Number

Here is the complete process, in order. Do not skip steps. Most port rejections come from step 2 or step 3 being done carelessly.

Step 1: Confirm Your Number Is Eligible to Port

Almost all Australian phone numbers are portable, but there are a handful of exceptions: numbers that are part of a bundled service with an outstanding minimum contract period (though you can still port, subject to early termination fees), numbers currently under a port lock due to a recent completed port, and numbers classified as ranges held by carriers for internal routing purposes (rare for business numbers).The fastest way to confirm: contact your new provider and give them the number. They can check portability within minutes through the local number portability database.

Step 2: Gather Your Account Details from the Losing Carrier

This is where most rejections originate. The Porting Authority form requires account details that exactly match what the losing carrier (your current provider) has on file. You need:- Account holder name: must match exactly, including any company/trading name variations. If your account is under 'Smith Plumbing Pty Ltd' but you write 'Smith Plumbing', it will be rejected. - Service address: the address registered on the account, not your current business address if these differ. - Account number or service ID: shown on your invoice. For NBN-bundled services, this is often the broadband account number rather than the phone number itself. - The phone number being ported: written in full with area code. - Any PIN or account password if your carrier uses one for verification. If you are unsure of any detail, call your current provider and confirm before submitting. A two-minute call saves up to a week of rejection delays.

Step 3: Submit the Porting Authority Form to Your New Provider

Your new provider will supply a Porting Authority (PA) form. This is the official authorisation document that gives the new provider permission to request the number transfer on your behalf. It is a short form, typically one page, but it must be completed accurately.The new provider submits the PA electronically to the Local Number Portability (LNP) system, which notifies the losing carrier. The losing carrier has a defined window to either approve the port or raise a valid objection. They cannot simply refuse.

Step 4: Wait for Confirmation and Agree on a Cutover Time

After the PA is submitted, your new provider should give you a scheduled cutover date and time. For Category A ports, this is typically within 1 to 5 business days. For Category C ports, allow 5 to 15 business days.You should receive written confirmation of the cutover time. Choose a time that minimises disruption: early morning before business hours, or outside peak trading periods. The technical cutover window is typically under 2 hours, during which inbound calls may not connect reliably.

Step 5: Cutover Day

On the agreed cutover day, the number transfers from the losing carrier to the gaining carrier in the LNP system. During this window:- Have a mobile number ready to receive any calls that cannot connect during the transition. Put a brief message on your voicemail or auto-attendant explaining that your number is being transferred and giving an alternative contact. - Your VOIP phones may need to re-register with the new provider after the port completes. Your new provider will advise on this. - If you are using a hosted PBX system, your provider will typically handle the technical cutover on the platform side.

Step 6: Test and Confirm

Once the new provider confirms the port is complete, test inbound calls from a mobile (not from the ported number itself). Test outbound calls. Test voicemail. If you have a 1300 number overlaid on the ported geographic number, test the 1300 routing separately.Notify your new provider immediately if anything is not working. Do not wait. Most post-port issues are routing anomalies that clear within 24 hours, but your provider needs to know so they can investigate if they do not clear.

Realistic Porting Timelines with Buffer

The industry timelines are targets, not guarantees. Here is what to actually plan for: If you have a hard deadline (a lease expiry requiring a business move, a promotional campaign with a published number), start the porting process well in advance. Two weeks for a simple port, four weeks for anything complex, is prudent planning.

Why Ports Get Rejected (and How to Fix Them)

A port rejection is not the end. It is a delay. The most common rejection reasons are all fixable, usually within a day or two of identifying the problem. When a port is rejected, your new provider should tell you the reason code. If they cannot tell you why the rejection occurred, that is a service quality issue with the new provider, not the porting system.

Porting 1300 and 1800 Numbers

Porting a 1300 or 1800 number is a different process from porting a geographic number. These are 'Smart Numbers' managed through the ACMA's Smart Numbers database, and they use a separate registration and transfer system.Key differences for 1300/1800 porting:- You own the 1300/1800 number registration, not your provider. The provider is the carrier delivering the service, not the registrant. - To transfer a 1300/1800 number to a new provider, you need to initiate a carrier transfer through the ACMA's Smart Numbers portal, or authorise your new provider to do it on your behalf. - The underlying routing (where the 1300 number forwards to) also needs to be updated with the new provider. Expect this to add time. - Timelines are typically 5 to 15 business days for a standard 1300 port, and can stretch to 4 weeks for complex routing arrangements. - Confirm with your new provider that they support 1300/1800 number hosting before you start. Not all VOIP providers offer 1300/1800 management.For more on 1300 numbers, see our full guide to 1300 numbers for Australian businesses.

Staying Reachable During the Port

The cutover window for a simple port is typically under 2 hours. For most businesses, this is manageable. Here is how to minimise disruption:**Before the port:** Set up call forwarding on your existing service to a mobile number during the planned cutover window. Most ISP phone services and VOIP services allow this through the account portal. This ensures any calls that land on the old system during the transition still reach a human.**On your new system, before cutover:** Have your new VOIP service provisioned and tested with a temporary number before the port completes. This means your PBX configuration, call flows, IVR, voicemail, and ring groups are all set up and working before your main number lands on the system. You are not configuring under pressure on cutover day.**Parallel running:** For businesses where continuity is critical (medical practices, high-volume inbound call environments), ask your new provider about parallel running: keeping the old service active and having calls route to the new service, with the old service as a backup, for a defined overlap period. Not all providers offer this, but it is worth asking.**Notify key contacts:** If you are making a major infrastructure change at the same time as porting (e.g. also moving premises), notify key clients or suppliers in advance. For most businesses, a simple port with a prepared new system is completely invisible to callers.

The Green Port Moment: Breaking Free from Your ISP

For many Australian businesses, number porting is not just a logistics exercise. It is the moment you escape a phone system you did not choose and never fully understood.When NBN rolled out, ISPs quietly moved millions of customers from PSTN landlines to VOIP via the green phone port on their supplied modem. The phone still worked. Nobody explained what had changed. Nobody mentioned that the VOIP service was now locked inside the modem's firmware, that SIP credentials were not available on request, or that you were now dependent on the ISP's call handling with no real alternatives under your current arrangement.Number porting is how you break that arrangement. You take your number to a dedicated VOIP provider. You gain control of your call routing, your IVR, your voicemail, your ring groups, and your call reporting. The ISP ATA becomes irrelevant. The green port becomes a dormant socket.The businesses that stay on the ISP ATA are quietly losing leads every week: the second simultaneous caller who gets an engaged tone and calls a competitor, the after-hours caller who gets nothing, the client on hold who hangs up because there is no hold music. Porting is not a technical exercise. It is a business decision. See our guide to VOIP vs traditional phone systems in Australia for the full business case.

Your Rights Under Australian Law: What ACMA and TIO Say

Australian telecommunications law gives you clear rights around number porting. Understanding them protects you if a losing carrier behaves badly.

ACMA Numbering Plan Rights

Under the Telecommunications Numbering Plan 2015 (administered by the ACMA), providers are required to support number porting. They cannot refuse a valid port request. They cannot impose unreasonable barriers, including demands for documentation beyond what is required to verify account ownership.The ACMA's Local Number Portability framework requires that porting transactions be completed within defined timeframes. Providers who consistently fail to meet these obligations can face regulatory action. If you believe your current provider is deliberately obstructing a valid port, you have escalation paths available.

Your Rights If a Provider Blocks or Delays Your Port

If a provider is blocking, delaying, or failing to process your port:1. Raise a formal complaint with your current provider first. This creates a paper trail. Ask for a written response. 2. If unresolved, escalate to the Telecommunications Industry Ombudsman (TIO) at tio.com.au. The TIO can investigate and direct providers to complete valid port requests. Filing a TIO complaint is free. 3. The TIO has authority to require providers to complete the port and may also award compensation for demonstrable losses caused by the delay. 4. For systemic issues, the ACMA accepts complaints about provider compliance with the Numbering Plan at acma.gov.au.In practice, most providers who initially drag their feet become considerably more responsive once a TIO complaint reference number is raised. Most porting disputes are resolved at the informal TIO complaint stage without needing a formal investigation.

What Happens to Your Number if You Leave Without Porting?

If you cancel your current service without porting your number, the number is released back to the carrier and eventually returned to the numbering pool. You lose the right to that number. There is no guaranteed recovery path.How long before the number is reallocated varies by carrier, but it is typically 30 to 90 days. Some providers may allow you to reclaim a recently released number, but this is not guaranteed and is at the carrier's discretion.The answer is simple: always port before you cancel. Never cancel first.

Porting Costs: What You Should Pay

For most Australian business VOIP ports, the gaining carrier (your new provider) does not charge a porting fee, or charges a nominal fee in the range of $0 to $30 AUD. Check your new provider's pricing documentation before committing.The losing carrier may charge a service disconnection fee or early termination fee if you are within a minimum contract period. This is separate from the porting process itself and depends on your contract terms. Check your contract for:- Minimum term and remaining duration - Early termination fee structure (flat fee vs remaining months pro-rated) - Whether porting triggers the ETF or only full cancellation doesFor 1300/1800 number transfers, some carriers charge a transfer administration fee, typically $20 to $50 AUD. Your new provider should advise on this upfront.For a full picture of VOIP business costs, see our guide to business phone systems in Australia.

Common Mistakes: What Most Businesses Get Wrong

These three mistakes cause the majority of porting delays. All are avoidable.

Mistake 1: Cancelling the Old Service Before the Port Completes

This is the most consequential mistake in number porting. If you contact your current provider and cancel your service, the number is released. Once released, it cannot be ported because it no longer belongs to you. The new provider has nothing to pull across.The correct sequence is: port first, confirm completion, then cancel. Your current provider will cancel the service automatically once the port clears in most cases. If they do not, contact them after confirmation to close the account.

Mistake 2: Submitting Account Details Without Verifying Them

The Porting Authority form is validated against the losing carrier's billing records. If a single field does not match, the port is rejected. Businesses often have accounts set up years ago under slightly different names, old addresses, or billing contacts who have since left.Spend five minutes on the phone with your current provider before submitting. Ask them to confirm the exact account holder name, service address, and account number on file. That call can save a week.

Mistake 3: Not Having the New System Ready Before the Port

Some businesses initiate the port and then scramble to configure the new phone system once the port completes. This means the number lands on an unprepared system: no IVR, no call routing, no voicemail configured. Calls ring to nowhere or route incorrectly.Your new VOIP system should be fully configured and tested on a temporary number before the port is submitted. When the port completes, the number simply points to an already-working system. No rush, no scramble. See our full NBN VOIP setup guide for the system configuration steps.

Your Next Steps: Pre-Port Checklist

Use this checklist before submitting your porting authority form:[ ] Confirm your number is eligible to port (ask your new provider to check the LNP database) [ ] Identify whether your port is Category A or Category C [ ] Retrieve exact account details from your current provider: account holder name, service address, account number [ ] Choose a new VOIP provider and set up your service with a temporary number [ ] Configure and test your PBX, IVR, call routing, voicemail, and ring groups on the temporary number [ ] Complete the Porting Authority form with verified account details [ ] Agree on a cutover date and time during a low-traffic period [ ] Set up call forwarding on your old service to a mobile for the cutover window [ ] Brief your team on the cutover window and backup contact number [ ] After port completion: test inbound calls, outbound calls, and voicemail [ ] After port confirmation: cancel old service (do not cancel before)If you are not sure which VOIP provider to move to or want a recommendation matched to your business size and call volume, our team can help. See the Get a Recommendation page.

Porting requests are rejected more often than most businesses expect. The most common causes are name mismatches, wrong account numbers, and service type errors. Our guide covers every number porting rejection reason in Australia and how to fix each one.

Businesses being forced off Telstra VoIP services need to understand their number porting rights before choosing a new provider. Our guide to the Telstra VoIP shutdown covers porting timelines, what happens to your 13/1300/1800 numbers, and how to migrate without losing your business numbers.

Your right to port a number is protected under ACMA rules -- a provider cannot withhold porting to keep you as a customer. For a broader overview of your rights under Australian Consumer Law when dealing with telco contracts, see Australian Consumer Law and Telco Contracts.

Before contacting your new provider to start a port, check your number type and porting category with our Number Porting Checker. It identifies whether your number is a standard geographic, mobile, 13/1300/1800, or data service, each follows a different porting pathway and timeline.

Will I lose my number during the port?

No. The number does not disappear during the port. There is a cutover window, typically under 2 hours for a Category A port, during which calls may not connect reliably. Outside that window, your number is active on either the old or the new system. The risk is not losing the number permanently. It is a brief period of reduced reachability during the cutover, which can be managed with call forwarding to a mobile.

How long does number porting take in Australia?

Category A ports (simple single-number transfers) typically complete within 1 to 5 business days, though most go through in 2 to 3 days. Category C ports (cross-network, 1300/1800, number blocks) take 5 to 15 business days. For planning purposes, add a buffer: assume 5 days for simple ports and 3 to 4 weeks for complex ones. First-attempt rejections due to account detail mismatches are common and each rejection adds 2 to 5 days to the process.

Can my current provider refuse to release my number?

No. Under the ACMA's Telecommunications Numbering Plan, providers are required to support number porting and cannot refuse a valid port request. They can reject a port for legitimate technical reasons (account detail mismatch, number not on account), but they cannot simply refuse to cooperate. If a provider is deliberately obstructing a valid port, you can escalate to the Telecommunications Industry Ombudsman (TIO) at tio.com.au. Most providers become significantly more cooperative once a TIO complaint reference is raised.

Does porting cost anything?

For most Australian business VOIP ports, porting fees are $0 to $30 AUD from the gaining carrier. Some providers charge nothing at all. The more significant cost to watch for is any early termination fee from your current provider if you are within a minimum contract period. Check your contract for ETF terms before initiating the port. For 1300/1800 number transfers, expect a small administration fee of $20 to $50 AUD from some providers.

Can I port a 1300 or 1800 number to a new provider?

Yes, but the process is different from geographic number porting. 1300 and 1800 numbers are registered in the ACMA's Smart Numbers database and use a carrier transfer process rather than the standard LNP porting system. You own the number registration; the provider is the carrier delivering the service. The transfer process typically takes 5 to 15 business days. Confirm with your new provider that they support 1300/1800 hosting before starting.

What happens if I cancel my service before porting?

The number is released back to the carrier and eventually returned to the numbering pool. Once released, the number cannot be ported because it no longer belongs to you. In rare cases, if the release was very recent, the carrier may be able to reclaim the number, but this is not guaranteed. Never cancel your service before the port is confirmed complete.

Do I need to be at my premises on cutover day?

Not necessarily, but someone who can test calls and liaise with your new provider should be available. The cutover is handled remotely between carriers. What you need to do on cutover day is: confirm the cutover has completed (your provider will notify you), test an inbound call from a mobile, test an outbound call, and confirm voicemail is working. This takes about 10 minutes. If you have a hosted PBX with a remote management portal, you do not need physical access to any hardware.

Can I port my number if I am moving to a different state?

Yes, with caveats. Geographic numbers carry area codes that indicate a state (02 for NSW/ACT, 03 for VIC/TAS, etc.). You can keep a Sydney 02 number even if you move to Melbourne, and it will continue to work. However, callers from Victoria calling your 02 number will pay STD rates rather than local rates, which may affect caller behaviour for customer-facing businesses. Many businesses that move interstate opt to either keep the original area code for continuity or add a local geographic number in the new state alongside the existing number.

Related reading:

• Category A vs Category C porting
• porting timelines explained
• 1300 number rules