
If you're receiving unwanted calls on your landline, you can block specific numbers from calling you. The process for blocking a number depends on your handset model and your service provider. Some handsets have built-in call block features, while others don't. You can also contact your service provider to explore your options for blocking calls. Additionally, you can use third-party services like robocall blocking or white list technology to block spam and unwanted calls.
| Characteristics | Values |
|---|---|
| Landline service provider | Telstra |
| Landline phone type | Uniden cordless |
| Call blocking features | Call block features, Call Guardian, Robocall Blocking, Whitelisting |
| Blocking process | Add numbers to a blocked calls directory |
| Blocking limit | 20-30 numbers |
| Blocking cost | $2.93 per month |
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What You'll Learn

Blocking specific numbers on Telstra
If you are a Telstra customer, you can block specific numbers from ringing your landline phone. The process depends on the handset you have—some have call block features, while others don't. If your handset doesn't have call block features, you can purchase one that does from Telstra. One such example is Telstra's Call Guardian, which allows you to screen calls by requiring the caller to announce who they are before placing the call.
To permanently block your landline caller ID, call Telstra at 13 22 00 to explore your options. If you want to temporarily block your number from being displayed on someone's caller ID, dial 1831 on your landline phone, followed by the number you want to call. This will block your number on the receiving party's device, so your call will be anonymous.
If you get a lot of unsolicited calls from telemarketers, consider registering your Telstra landline number on the Do Not Call Register. However, it's important to note that this list only works for legitimate organisations, and your number can be sold to companies who will use it for outbound calls.
In November 2021, Telstra began blocking calls made from ServiceM8 Phone to Telstra numbers where the outbound Caller ID is set to a Telstra number. This was done in response to new industry regulations under the Reducing Scam Calls (C661:2020) code in Australia. If you use ServiceM8 Phone and have your outbound Caller ID set to a Telstra number, you will need to set it back to your ServiceM8 Phone number or port your Telstra number to ServiceM8 Phone.
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Using a handset with call blocking
If you're receiving unwanted calls on your landline, you can block specific numbers from calling you by using a handset with call-blocking features. The process for blocking numbers will depend on the type of handset you have. Here are some general steps and tips for using a handset with call blocking:
- Check your handset model: Not all handsets have built-in call-blocking features. Before attempting to block a number, check your handset's user manual or manufacturer's website to confirm if it supports call blocking. If your current handset doesn't support this feature, you may need to purchase a new one that does. Telstra, for example, offers handsets with call-blocking capabilities, such as their Call Guardian device.
- Utilize the handset's call-blocking settings: If your handset does support call blocking, access its settings or menu options to find the call-blocking feature. This could be labelled as "Call Blocking," "Call Filter," or something similar. From there, you should be able to add specific phone numbers that you wish to block. Refer to your handset's instructions for detailed steps on how to add numbers to the block list.
- Block anonymous or withheld numbers: Many handsets offer the ability to block anonymous or withheld numbers. This feature ensures that callers who hide their phone numbers cannot reach you. Typically, these callers will receive a message stating that you don't accept calls without Caller ID information. To activate this feature, you may need to dial a specific code, such as *77, or enable it through the handset's settings or your service provider's website or app.
- Consider additional blocking options: Depending on your handset and service provider, you may have access to more advanced blocking options. For example, some handsets or service providers offer a "Do Not Disturb" mode, which allows you to set specific hours during which all calls are sent directly to voicemail. Additionally, some service providers offer apps or services that provide enhanced call-blocking capabilities, such as blocking known scam or spam callers.
- Explore third-party apps: If your handset's built-in blocking features are limited, you can explore third-party call-blocking apps. These apps often use call data, user reports, and other sources to predict and block illegal or scam calls. However, be sure to review the app's privacy policy to understand how it handles your information. Additionally, some apps may be free, while others may charge a fee for their service.
By following these steps and utilizing the features offered by your handset and service provider, you can effectively block unwanted calls and enhance your privacy. Remember to refer to your specific handset's instructions for detailed steps on how to block numbers, as the process may vary slightly between different models and service providers.
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Blocking your own outgoing Caller ID
If you are a Telstra customer, you can block your landline Caller ID. This can be done on a call-by-call basis or permanently.
To block your number on a call-by-call basis, first dial 1 8 3 1 and then dial the number you want to call. When you do this, your caller ID won't be displayed.
If you wish to block your caller ID on a permanent basis, Telstra refers to this as an 'unlisted service'. You can enable this feature in My Telstra. You can also call Telstra at 13 22 00 to explore your options.
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$28.39

Using a robocall blocker
If you're receiving unwanted calls on your landline, you can block specific numbers from ringing your phone. This can be done by purchasing a handset with call-blocking features, such as Telstra's Call Guardian, which allows you to screen calls and block specific numbers.
Another option is to use a robocall blocker, such as the CPR V5000 Call Blocker. This device is compatible with most major landline phone manufacturers, including Panasonic, Uniden, Motorola, and VTech. It includes a spam registry with 5000 known robocall spam numbers and allows you to block an additional 1500 numbers. You can add numbers to the block list manually or by selecting them from the call history. The CPR V5000 also has a "Delete" button to remove blocked contacts and a "Block List" button to view the blocked contacts list.
The Panasonic Call Blocker is another option, which comes with 14,000 pre-loaded numbers on the block list. In addition to robocalls, it can block unknown international calls and 00-prefix numbers.
Other options for blocking robocalls include the AT&T CL84107 Corded Phone, which can be used as a corded or cordless telephone and has a call-waiting feature. This device can store call history and caller ID logs for up to 50 numbers.
It's important to note that blocking calls may not always be effective, as scammers can change their numbers frequently. Additionally, some call-blocking methods may not work with certain types of phone connections, such as DSL lines.
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Blocking entire ranges of numbers
If you are a Telstra customer, you can block specific numbers from ringing your landline phone. This mostly depends on the handset you have—some have call block features, while others don't. If your landline handset doesn't have call block features, you can purchase one that does from Telstra. For example, Telstra's Call Guardian allows you to screen calls and block specific numbers by requiring the caller to announce who they are before placing the call.
Another option is to register your number on the Do Not Call Register. However, this method is ineffective against scam callers, as it only prohibits legitimate organisations from making unsolicited calls to you. It also doesn't block callers from outside Australia.
You can also consider plugging in a cheap handset to act as a landline, which will allow you to block numbers and make use of Android's automatic spam filter.
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Frequently asked questions
There are several ways to block unwanted calls from reaching your landline phone in Australia. If you are a Telstra customer, you can block specific numbers from ringing your landline phone. You can also purchase a handset with call blocking features from Telstra, such as the Call Guardian, which allows you to screen calls. Alternatively, you can register your number on the Do Not Call Register, which is a list shared with registered telemarketers to signal which numbers they cannot call. However, this only works with legitimate organisations. Another option is to use a robocall blocker, which requires callers to push a button before they can be connected with you, effectively blocking scammers and telemarketers who use robocallers.
Most Uniden cordless phones sold in Australia have call blocking features. To block a number, go to the "menu" setting, usually where you set ringtones, time and date, etc. From there, you can block specific numbers or even entire ranges of phone numbers.
To block your landline Caller ID, you can call Telstra at 13 22 00 to explore your options. Additionally, in Australia, you can dial 1831 before the number you wish to call to hide your landline number on a call-by-call basis.
Yes, you can purchase a cheap handset with call blocking options, such as an Android phone, and use it as your landline. This will allow you to take advantage of Android's automatic spam filter, which can effectively block unwanted calls. Additionally, some service providers offer the ability to block calls from a set number of phone numbers, but this may not significantly reduce the number of spam calls you receive.
While there is no one-size-fits-all solution to blocking spam calls, using a robocall blocker or a whitelist technology, such as Community Phone's Complete Spam Blocking service, can be effective. A robocall blocker requires callers to press a button before they can be connected, effectively blocking automated spam calls. With a whitelist, only approved callers can reach you, and all other numbers are blocked or sent to voicemail.

























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