- Spam
- Scam
- Suspicious
Community reports for 0483 948 558 (0483948558): Callers impersonate Telstra, Australian Government Cyber Department, and tech support to trick people into revealing personal information.
Impersonation Scam Reports for 0483 948 558
Eight contributors have reported calls from 0483 948 558 (also written as 0483948558), an Optus mobile number, with a clear pattern of impersonation scams. Three separate reports describe callers falsely claiming to represent Telstra, Australian Government departments, and technical support services. The scammers use urgency and authority tactics to convince contributors to engage with malicious requests or reveal personal information.
The most recent activity shows 0483 948 558 continues to be active in 2026, with repeated calls over consecutive days despite no voicemail being left. This behaviour suggests the number is part of an active campaign rather than isolated fraud attempts.
What Callers from 0483 948 558 Claim
Contributors who answered calls from 0483 948 558 report highly specific impersonation tactics. One caller claimed to be from Telstra technical support, alleging that the recipient's IP address had changed from private to public status and required immediate technical intervention. Another call used an Indian accent with background noise and claimed to be from a technical department diagnosing router performance issues.
The most alarming report about 0483948558 involved a caller impersonating the Australian Government Cyber Department, claiming they could help with Russian hackers accessing the recipient's phone number. This tactic exploits both authority and fear to pressure people into complying with the scammer's demands without verification.
Call Patterns and Activity
Reports spanning from 2023 to 2026 indicate 0483 948 558 has been used repeatedly for scams. In 2023, three separate answered calls occurred within one day, suggesting coordinated calling activity. Recent reports from 2025 and 2026 show the number continues making contact, with multiple missed calls in short periods without voicemail messages left.
One contributor received two calls from 0483 948 558 within two days in August 2026 and noted previous reports existed going back to 2025, indicating this number remains actively in use for scamming despite being flagged multiple times. Silent calls and text message probing (asking to confirm the recipient's identity) suggest the scammers may be verifying active numbers for future targeting.
What to Do If You Receive a Call from 0483 948 558
If 0483 948 558 calls you:
- Do not: Answer unsolicited calls claiming to be from Telstra, government departments, or technical support. Never provide personal information, bank details, passwords, or device access to unknown callers.
- Do: Let it go to voicemail. If the caller leaves a message, independently verify by contacting the organisation directly using a phone number from their official website-never use numbers provided by the caller.
- Block the number: Use your phone's blocking feature to prevent future calls from 0483948558.
- Hang up immediately: If you accidentally answer, hang up without engaging. Real support organisations do not demand immediate action or provide unsolicited warnings about security threats.
What to Do If You Receive an SMS from 0483 948 558
If 0483 948 558 sends you an SMS:
- Do not: Reply to the message or click any links. Do not confirm your identity or provide any personal details, even if the message appears to come from a legitimate organisation.
- Do: Forward the SMS to 0429 999 888 (Australia's spam SMS reporting number) and then delete the message.
- Block the number: Add 0483948558 to your phone's blocked contacts to prevent further contact.
How to Report 0483 948 558
Report this number and your experience through multiple Australian channels:
- Scamwatch (scamwatch.gov.au): Report impersonation scams claiming to represent Telstra, government departments, or tech support. Provide details of what the caller claimed and what they requested.
- ACMA (acma.gov.au): Report the Optus mobile number 0483 948 558 for scam activity and repeated unwanted calls. ACMA can investigate and take action against providers allowing their numbers to be used for fraud.
- Telstra directly: If the caller impersonated Telstra, report this to Telstra's fraud team via their official website or a call to their verified support line (independently verified, not from any caller).
- ReportCyber (cyber.gov.au): If the call involved impersonating government cyber security services, report to ReportCyber for investigation.
- Reverseau: Report your experience with 0483948558 here to help the community identify and avoid this number.
Help others by sharing your experience with 0483 948 558!
WRITE A REVIEWRatings Distribution
What Our Users Reviewed
I don't answer calls from numbers not in my contact list because of the prevalence of scams but this is the 2nd call in 2 days from an unknown mobile where no message has been left so I decide to check it.
Previous reports are up to 2025 but it looks like the number is again in service.
Missed call, phone identified as spam caller, no message
Got text asking if this is [name]'s number, didn't answer
Missed call at 1:53 PM from unknown number, no message left
Received this call a couple of days ago saying she was from Telstra and that my IP address had changed from private to public. Hung up as was complete scam.
Missed the call, no message left
Indian accent, noisy background, claimed to be from technical department saying router was slow, hung up
Pretended Australian Government Cyber Department, said could help with Russian hackers accessing my number
Help others by sharing your experience with 0483 948 558!
WRITE A REVIEWFrequently Asked Questions
Why do callers from 0483 948 558 claim to be from Telstra or government?
Impersonating well-known organisations like Telstra and Australian Government departments exploits trust and authority. Contributors report that 0483 948 558 callers used these false identities to create urgency (IP address problems, security threats) and pressure recipients into complying without verification. This is a classic social engineering tactic where the scammer's credibility hinges on the name they're impersonating, not their actual legitimacy.
What should I do if 0483948558 claims my IP address has changed?
Hang up immediately. Real Telstra support does not contact customers unsolicited with claims about IP address changes. Contributors who received this specific claim from 0483 948 558 correctly identified it as a scam and disconnected. If you have genuine concerns about your internet connection, contact Telstra directly using the phone number on your bill or their official website-never use a number provided by an incoming caller.
Is 0483 948 558 actually from Optus?
The number is registered to an Optus mobile service, but the legitimate Optus account holder is almost certainly unaware their number is being spoofed or hijacked for scams. Scammers often compromise or steal mobile accounts, or use VoIP services that appear to originate from real Australian numbers. The allocation to Optus does not mean Optus is running the scam-it means the account has been compromised. Reporting to ACMA (acma.gov.au) helps identify and suspend such accounts.
Why does 0483 948 558 keep calling and not leaving messages?
Contributors noted multiple calls from 0483948558 over consecutive days with no voicemail left. This pattern suggests the scammers are testing which numbers are active and monitored by real people. Once they establish you answer or listen to voicemail, they may escalate to answered calls with the full impersonation pitch. Repeated silent calls are a common phase of scam campaigns before the actual fraud attempt.
What does it mean when 0483 948 558 sends an SMS asking 'Is this [name]'s number?'
This is number verification. Contributors reported receiving such SMS from 0483948558 without answering the call. The scammers are confirming that the number is active and belongs to a real person they can target. Do not reply to such messages. Responding confirms the number is monitored, increasing the likelihood of follow-up scam calls. Forward the SMS to 0429 999 888 and block 0483948558.
Should I report 0483 948 558 to my phone provider?
Yes. Contact Optus directly and report that 0483948558 is being used for scams impersonating Telstra and government departments. However, also report to ACMA (acma.gov.au) for formal investigation, as ACMA has regulatory authority over telecommunications providers. Scamwatch (scamwatch.gov.au) should receive your report as well to help identify broader scam campaigns using this number. Multiple reports increase the likelihood of action.