All test numbers for Telstra begin with 12722. Test numbers for Optus all begin with 12723. There are also a few common test numbers that are used by all carriers
Common Test Numbers used by all carriers
PSTN Carrier Test Numbers
| Test Number | Service |
| 12711 | Long distance carrier pre-selection confirmation |
| 1800 80 1920 | Own number RVA |
Telstra Test Numbers
| Test Number | Service |
| 12722 0 | CND send status |
| 12722 123 | Own number RVA (old number 19 123) |
| 12722 199 | Ringback (old number 199) |
| 12722 40001 | "The number you have called is not available from this service" |
| 12722 40003 | "This service is not connected" |
| 12722 40004 | "Your attempt to use this feature has been unsuccessful" |
| 12722 40005 | "The feature you have tried to to use is not provided" |
| 12722 40006 | "The number you have called is not connected" |
| 12722 40007 | Recorded busy tone |
| 12722 40008 | "Congratulations. You have accessed a standard network test message recording" |
| 12722 40009 | "The person you are dialling now has a new telephone number. To find out the new number please call Telstra's changed number information service" |
| 12722 40010 | "The number you are calling is currently unavailable" |
| 12722 40020 | "The number you have called is not compatible with your equipment" |
| 12722 40023 | "The service type you have requested is not provided" |
| 12722 40024 | "You have attempted to call via a service provider network. All lines are currently busy. Please delay your call for a short time" |
| 12722 40033 | "This number is not in service. Please use the alternate number for the person you are trying to contact" |
| 12722 40034 | "This telephone number cannot be dialled with an area code. Please try again without using the area code" |
| 12722 40035 | "Thank you for using Telstra for your long distance calls" |
| 12722 40036 | Congestion tone |
| 12722 40037 | Congestion tone |
| 12722 40064 | "Operator assisted calls are not permitted to this number" |
| 12722 42209 | "Your Telstra call waiting feature is on" |
| 12722 42210 | "Your Telstra call waiting feature is off" |
| 12722 42211 | tone... "Your Telstra call waiting feature is on" |
| 12722 42212 | tone... "Your Telstra call waiting feature is off" |
Optus Test Numbers
| Test Number | Service |
| 12723 12 | Own Number RVA (old number 127 2311) |
| 12723 22 | 1kHz |
| 12723 99 | Ringback |
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