An unknown number that keeps calling occupies a strange space. It feels minor enough that people hesitate to raise it, and unsettling enough that they cannot ignore it. Harassment, scam contact, a withheld number turning up at odd hours, or a number found somewhere it should not have been.
We provide phone number search in Brisbane and throughout Queensland, for private clients, law firms, insurers and employers.
How we run phone number search in Brisbane
We work from lawful lookup and open source sources to identify what can be identified about a number and its origin, and we cross reference against other information you already hold. We are clear about a hard limit here: intercepting communications is a federal offence under the Telecommunications (Interception and Access) Act 1979, and no investigator can lawfully obtain call content or read messages. Anyone offering that is either lying or committing an offence.
What Queensland law means for this work
Queensland licenses investigators under the Security Providers Act 1993, administered by the Office of Fair Trading. Private investigator is one of the security provider classes in section 4, and section 9 makes it an offence to act as or even advertise as a security provider without a licence. A separate security firm licence is required to run an investigation business.
Listening devices are covered by Part 4 of the Invasion of Privacy Act 1971. Section 43 prohibits using a listening device to overhear, record or monitor a private conversation, with a maximum of 40 penalty units or two years imprisonment. Queensland does permit a party to a conversation to record it, which is a real difference from several other states.
Section 44 of the Invasion of Privacy Act prohibits communicating or publishing a private conversation obtained unlawfully, and section 45 restricts what even a lawful party to the conversation may publish.
None of that is a formality. The rules differ genuinely between Australian jurisdictions, and evidence gathered outside them is frequently inadmissible and can expose the person who gathered it. Working inside the QLD framework is what makes the result usable.
The federal statutory tort of serious invasion of privacy, which commenced on 10 June 2025 under Schedule 2 of the Privacy Act 1988, applies on top of QLD law and contains no exemption for private investigators.
This is general information about how we operate, not legal advice. For advice on your circumstances, speak with your lawyer.
What you receive
You receive what could be established about the number and its origin, documented so that it can be given to police, to a lawyer, or used to support an intervention order application.
Where we work in Queensland
Brisbane divides into the inner city around Fortitude Valley, New Farm, South Brisbane and West End, the north through Chermside and Aspley, the south through Mount Gravatt and Sunnybank, the east through Bulimba, Morningside and Wynnum, and the west through Toowong, Indooroopilly and St Lucia, with Ipswich, Logan, Moreton Bay and Redlands around it. Beyond the South East we cover the Gold Coast, the Sunshine Coast, Toowoomba and the Darling Downs, Wide Bay, Central Queensland, Mackay and the Whitsundays, Townsville, and Cairns and the far north.
Where the evidence ends up
- Magistrates Courts of Queensland. Summary crime, committals, domestic violence protection orders and smaller civil claims.
- District Court of Queensland. Mid tier indictable crime and civil claims, with the civil limit currently $750,000.
- Supreme Court of Queensland. Unlimited civil jurisdiction and the most serious crime, with the Court of Appeal above it.
- QCAT. Minor civil and debt disputes to $25,000, tenancy, building disputes, guardianship and review of Office of Fair Trading decisions.
- Federal Circuit and Family Court of Australia. Family law is federal, so a family matter runs under Commonwealth law even though the conduct investigated is governed by QLD rules.
Frequently asked questions
Can you tell me who owns any mobile number?
Not always, and honesty here matters more than a sales answer. Carrier records are protected. What can often be established comes from lawful lookup sources, open source traces and cross referencing, and results vary considerably between numbers.
Can you access someone’s calls or messages?
No. That is a federal offence and we will not do it. If someone has offered you that service, they have told you something important about how they operate.
Do you cover regional Queensland as well as Brisbane?
Yes. Brisbane work can generally be mobilised faster and at lower cost. Regional work carries travel time and expense, and we will tell you honestly whether the likely result justifies it before you commit.
Talk to us about a QLD matter
Every enquiry starts with a confidential conversation about what you actually need, and sometimes that conversation ends with us saying an investigation is not warranted. Call 1300 792 283 or get in touch for a free consultation and a written quote before any work begins.
See also Phone Number Search in Melbourne, our Queensland coverage and our Brisbane page.