You receive a call from a number starting with 05. The 05 area code covers the southwest of France and some overseas territories: Bordeaux, Toulouse, Pau, the Pyrenees. It is a geographic number, not a commercial number. However, malicious actors use this familiar prefix to encourage you to pick up.
Local number spoofing: the technique behind fake calls from 05
Before discussing telemarketing or regulations, a technical point deserves to be made. The increase in suspicious calls from 05 numbers is not due to a surge in telemarketing in the southwest. It is based on a specific practice: number spoofing.
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The principle is simple. An automated calling system displays a 05 number on your screen that is not its own. The caller can be located anywhere. They choose a geographic prefix because you are more likely to answer a local number than a 09 or an unknown number.
This technique makes it very difficult for the recipient to distinguish between a legitimate call and a fraudulent one. A Bordeaux doctor, a town hall in Béarn, or your plumber uses the same prefix as a scam network. Understanding calls from 05 and their risks starts with this technical reality, well before legislative questions arise.
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Some operators are beginning to deploy caller identification systems that verify the consistency between the displayed number and the actual origin of the call. Bouygues Telecom, for example, has launched a service that allows you to identify who is really calling you. This type of solution should become widespread.
Telemarketing law 2026: what changes for B2C calls
You may have noticed that unsolicited commercial calls have been decreasing in recent months. This is not a coincidence. The law of June 30, 2025, has established a change in logic for telemarketing aimed at individuals.
From the Bloctel system to the obligation of prior consent
Until recently, the system relied on Bloctel: you registered on a list to no longer be solicited. Companies had to consult this list before calling. This mechanism is disappearing in favor of an inverse logic. A professional can no longer call a consumer without their explicit prior consent.
In practice, consent must be free, specific, and given through a clear action. A pre-checked box on a form is no longer sufficient. Databases of prospects created before this reform can no longer be used as they are.
Fines and regulated hours
The legal time slots for telemarketing calls are limited: from Monday to Friday, between 10 AM and 1 PM and then between 2 PM and 8 PM. Outside of these time slots, any commercial call is illegal. The financial penalties for companies in violation are severe.
The sectors most affected by the restrictions include energy renovation and CPF, which are regularly associated with abusive practices.
Common phone scams: recognizing a fraudulent call from 05
The new regulations reduce the volume of legal commercial calls. Fraudulent calls, on the other hand, do not comply with any laws. Here are the most reliable warning signs to identify a suspicious call:
- The call is silent for several seconds after answering. This technique, recently documented, serves to confirm that your number is active before reselling it or calling you back with a scam scenario.
- The caller asks you to confirm personal information (social security number, bank details, contract number). No legitimate organization operates this way over the phone.
- You are offered a refund, a prize, or an urgent regularization. Manufactured urgency is the main lever of phone scams.
- The displayed number does not match the organization announced by the caller. A call supposedly made by your bank from a 05 number while your branch is in Île-de-France should raise alarms.
If in doubt, hang up and call the organization yourself using the official number on your documents. Never call back the number that appeared.
Reporting and recourse: what to do after a suspicious call from 05
Many people hang up and move on. However, reporting is the only way to bring fraudulent numbers to the attention of the authorities.
33700 is the reporting number for voice and SMS spam. You can send the suspicious number via SMS to 33700, free of charge. This report feeds into a database consulted by operators and state services.
For cases of proven fraud (attempted extortion, identity theft), filing a complaint with the police or gendarmerie remains the appropriate step. The DGCCRF also handles reports related to abusive telemarketing.
Additionally, the government launched a national file of accounts reported for fraud risk in May 2026, aimed at strengthening the fight against transfer scams. This system does not directly target telemarketing but is part of a broader strengthening of consumer protection tools.
The 05 area code is not a signal of danger in itself. The real criterion remains the behavior of the caller: pressure, urgency, request for personal information. With the shift towards prior consent and caller identity verification tools, the framework is evolving. Tools are progressing, but no automatic filter replaces the instinct to hang up and verify for yourself.