1300 numbers are Australian domestic numbers and are not guaranteed to be accessible from overseas. Some international callers can reach them using the international dialling format (+61 300 XXX XXX), but whether your call actually connects depends entirely on your overseas carrier — and many carriers will not route it at all. If you need a reliable way to reach an Australian business from abroad, look for a standard geographic number on their website instead.
That answer covers the basics, but there is more to understand depending on whether you are a caller overseas trying to get through, or an Australian business owner wondering whether your 1300 number is serving your international customers. Both situations are covered below.
For Callers Overseas: How to Try Reaching a 1300 Number
If you are outside Australia and need to call a business that only publishes a 1300 number, you have one option worth trying before giving up.
The International Dialling Format for 1300 Numbers
The format is: your international access code + 61 + 300 + the remaining six digits.
When you dial a 1300 number, the leading "1" is stripped and replaced with Australia's country code. So a number like 1300 123 456 becomes:
- +61 300 123 456 (using the + prefix on a mobile phone)
- 0011 61 300 123 456 (from a landline in most countries, using 0011 as the international access code — note: the UK uses 00, not 0011)
The "1" at the beginning of 1300 is dropped entirely. What remains — 300 123 456 — is dialled after +61.
This method sometimes works. It is not a workaround or a hack; it is simply how the international public switched telephone network (PSTN) handles Australian service numbers when dialled from abroad. The uncertainty lies not in the format, but in whether your carrier routes the call at all.
Why Your Call to a 1300 Number May Not Connect
1300 numbers are a shared-cost service number class, regulated by the Australian Communications and Media Authority (ACMA). They are designed for domestic use — callers within Australia pay a local call rate, and the business pays for the remainder of the call.
Because they are shared-cost numbers, many overseas carriers treat them the same way they treat premium-rate and other non-geographic service numbers: they block them outright. The practical result is that your call may:
- Fail silently (the call simply does not connect)
- Return a recorded message such as "the number you have dialled is not in service" or "this call cannot be completed as dialled"
- Ring and then disconnect before reaching anyone
This is not a fault with the number itself. It is a carrier-level routing decision made by your provider in the country you are calling from, and there is nothing the Australian business — or you — can do to override it.
What to Do When the Call Does Not Connect
The most reliable alternative is to look for a standard geographic number on the business's website — a number starting with 02, 03, 07, or 08. These numbers are fully reachable from any country using standard international dialling:
- +61 2 XXXX XXXX for a Sydney/NSW number
- +61 3 XXXX XXXX for a Melbourne/VIC number
Strip the leading zero from the area code and add +61. Geographic numbers are routed like any other international PSTN call and will connect from virtually any country.
If the business only lists a 1300 number, try contacting them via email or their website contact form and ask them to provide an alternative number for your call.
Calling a 1300 Number from Specific Countries
New Zealand
Calling an Australian 1300 number from New Zealand is the most consistently successful international scenario. Most major NZ carriers (Spark, One NZ, 2degrees) do route calls to Australian 1300 numbers using the +61 300 XXXXXX format. It still cannot be guaranteed — routing depends on your specific carrier and plan — but NZ callers have a reasonable chance of getting through.
Dial: 00 61 300 XXX XXX from a NZ landline, or +61 300 XXX XXX from a mobile.
United Kingdom
The UK is less reliable. Many UK carriers, including several of the major networks, categorise Australian 1300 numbers under shared-cost or non-geographic service restrictions and decline to route the call. If you are calling from the UK, try the +61 300 format first, but be prepared for it not to connect. Look for a geographic number as your fallback.
Dial: 00 61 300 XXX XXX from a UK landline, or +61 300 XXX XXX from a mobile.
United States and Canada
Connectivity from the US and Canada is unreliable. Major US carriers including AT&T and Verizon do not consistently route calls to Australian 1300 numbers. The call failure rate from North America is high enough that you should not rely on this method. Seek a geographic number or use an alternative contact channel.
Dial: 011 61 300 XXX XXX from a US/Canadian landline (011 is the international access code in North America), or +61 300 XXX XXX from a mobile.
Asia (Singapore, Hong Kong, Japan, and Elsewhere)
Connectivity from Asian countries varies considerably by carrier and by country. Some Singapore and Hong Kong carriers do route the call; others do not. It is worth trying using the +61 300 format, but the outcome is unpredictable. If you have a time-sensitive inquiry, pursue a geographic number or email contact in parallel.
For Australian Businesses: What This Means for Your Phone Strategy
If your customers include people located outside Australia — whether they are international clients, expatriate Australians, or businesses with offices abroad — your 1300 number alone is not a sufficient contact solution for them.
This is not a flaw in 1300 numbers. They were designed and priced for the domestic market, and they serve that purpose very well. But if international accessibility matters to your business, you need to plan around it deliberately.
Add a Geographic Number as an International-Facing Contact
The simplest and most reliable fix is to provision a standard Australian geographic number — for example, a 02 (NSW/ACT) or 03 (VIC/TAS) number — and display it clearly on your website alongside your 1300 number, with a note that it is the number for international callers.
For example, your contact page might read:
Within Australia: 1300 XXX XXX
Calling from overseas: +61 2 XXXX XXXX
This one addition removes the ambiguity for international callers and ensures they can reach you without frustration. Pickle can provision local geographic numbers alongside your existing 1300 number — both can route to the same team or the same destination number, so your operations remain unified.
For a broader look at which number type suits different business needs, the guide on which business phone number is right for your Australian business walks through the decision in detail.
Consider a DID (Direct Inward Dial) Number for High-Volume International Markets
If your business regularly receives enquiries from a specific overseas market — say, the UK or Singapore — a DID (Direct Inward Dial) number is worth considering. A DID number gives you a local phone number in another country (e.g., a UK 020 number or a US 1-XXX number) that forwards calls directly to your Australian line.
From the caller's perspective, they are dialling a local number. They pay local call rates. The call routes transparently to your Australian team. This removes the international dialling barrier entirely and can meaningfully improve contact rates from overseas markets.
Review Your Website's Contact Page
Even without provisioning a new number, check what your contact page currently shows. If it only displays your 1300 number with no alternative, international visitors may be unable to reach you and may not know why. A simple content update — adding a geographic number or a note explaining the situation — can recover contact opportunities you may currently be losing.
What About 1800 Numbers? They Have the Same Problem.
It is tempting to think that switching from a 1300 number to a 1800 number might solve international accessibility — particularly because 1800 numbers are free to call within Australia. They are not the answer.
1800 numbers face exactly the same international routing problem as 1300 numbers. They are also a non-geographic, shared-cost service class, and overseas carriers treat them identically. Dialling +61 800 XXX XXX from overseas is equally unreliable. The comparison of 1300 versus 1800 numbers covers the differences between the two number types in detail, but international accessibility is not a meaningful point of difference — both have the same limitation.
If you are currently weighing up 1300 versus 1800 for your business, that decision should be driven by cost structure and caller experience within Australia, not by international accessibility. For international reach, a geographic number is the correct solution in either case.
And if you have ever wondered whether 1300 numbers are free to call within Australia, that is covered separately — are 1300 numbers free to call in Australia explains exactly what callers pay and when.
Frequently Asked Questions
Q: Can I call a 1300 number from New Zealand?A: Often yes, but not always. Most major New Zealand carriers do route calls to Australian 1300 numbers when dialled as +61 300 XXXXXX. Dial 00 61 300 XXX XXX from a NZ landline or +61 300 XXX XXX from a mobile. If the call does not connect, look for a geographic number (02, 03, 07, or 08) on the business's website and use that instead.
Q: Why does dialling +61 300 XXXXXX not always work?A: 1300 numbers are classified as shared-cost service numbers in Australia. Many overseas phone carriers apply blanket blocks on non-geographic and shared-cost number ranges, preventing the call from routing at all. The failure happens at your carrier's level — it is not a fault with the Australian number. Your carrier's routing policy determines whether the call gets through, and that policy varies between providers and countries.
Q: Is there a way to make my 1300 number work internationally?A: Not directly. You cannot configure a 1300 number to guarantee international connectivity — that is outside your control as the number owner, because the limitation sits with overseas carriers. The practical solution is to add a standard geographic number (02, 03, 07, or 08) to your contact details specifically for international callers, or provision a DID number in the country or countries where your international customers are based. Pickle can help you set up either option alongside your existing 1300 number.
Q: Can I call a 1300 number from the UK?A: Connectivity from the UK is unreliable. Many UK carriers block shared-cost number ranges, which includes Australian 1300 numbers. You can try dialling 00 61 300 XXX XXX from a UK landline or +61 300 XXX XXX from a UK mobile, but there is a significant chance the call will not connect. If it fails, check the business's website for a geographic number starting with +61 2, +61 3, +61 7, or +61 8, which will reach them reliably.
Q: What number format should I give international customers?A: Give international customers a standard geographic number in the format +61 X XXXX XXXX — for example, +61 2 9XXX XXXX for a Sydney number. This format works from any country using any carrier. If you only have a 1300 number, the recommended approach is to add a geographic number to your account and display it on your website specifically for overseas callers. Do not give international customers a 1300 number as their primary contact method — the chance of a failed call is too high to be considered reliable.
Have questions about setting up international-friendly phone numbers for your Australian business? Pickle's team can help you add a geographic number or DID to your existing setup.
Call: 1300 688 588 Email: [email protected]Web: thinkpickle.com.au