Numbers starting with 05 are geographic numbers linked to the southwest of France and the overseas departments. In the numbering plan managed by Arcep, they belong to the same family as 01, 02, 03, and 04. A call to a 05 number is charged at the price of a local call, included in almost all current fixed and mobile plans.
However, the question of surcharging arises regularly because some calls received from a 05 number seem suspicious or come from automated platforms.
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To better understand the distinction between geographic codes and value-added service numbers, you can consult Comme Vous Voulez to learn more about the pricing mechanisms related to French telephone prefixes.
Why a 05 number cannot be surcharged in the regulatory sense
Telephone surcharging, in the strict sense, refers to an additional cost charged on top of the call price. This additional cost compensates for a value-added service (VAS): technical assistance, contests, information services. In France, only certain prefixes are authorized to carry this type of billing.
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VAS numbers use the prefixes 08 (long numbers with 10 digits) or short numbers with 4, 6, or 10 digits. Geographic numbers (01 to 05) are excluded from this system. Arcep, which establishes the national numbering plan, classifies 01 to 05 in the category of normally priced numbers.
A 05 number cannot therefore generate a surcharge on the telephone bill. Even if the service connected to this number is commercial (hotline, matchmaking platform), the communication itself remains charged as a standard geographic call.
Numbers masked behind a 05 prefix: the real risk to know
If the 05 cannot be surcharged, it can, however, serve as a facade. Since the generalization of IP telephony, cloud operators (OVHcloud Telecom, Keyyo, and others) allow companies to present a number from 01 to 05 as the displayed number, while the call is routed through a remote technical platform.
This process is used by call centers, telemarketing services, or matchmaking platforms. The call itself remains charged at the geographic rate. The risk is not the surcharge on the telephone line, but an indirect cost: subscription to a service, commission charged after registration, purchase validated by phone.
The confusion comes from there. The displayed 05 number is legitimate from a pricing perspective, but the interlocutor may seek to obtain a commercial commitment. This is a nuance that articles on surcharged numbers rarely address.
Warning signs on an incoming call from a 05
- An automated voicemail message asking to call another number (often starting with 08): the extra cost would come from the callback, not from the initial call to 05
- A text message received from a 05 inviting you to dial a short number or click on a link: the short number may, in fact, be surcharged
- An interlocutor offering a paid service via direct debit or added to the operator’s bill, unrelated to the called number
Checking the pricing of a number: tools and concrete method
For numbers starting with 08, Arcep has implemented a standardized color code. Green numbers (0800, 0801, etc.) are free. Gray numbers (0806 to 0809) are at normal pricing. Purple numbers (081, 082, 089) are surcharged. This signaling does not apply to 05 numbers, precisely because they do not fall under the VAS system.
To dispel any doubts about any number, the most reliable approach remains the reverse directory of VAS numbers, accessible on the site infosva.org. This service, established as part of Arcep’s regulation, allows you to enter a number and obtain the name of the service provider, the applicable rate, and the type of service.
What the SVA directory does not cover
The infosva.org directory lists VAS numbers (08 and short numbers). If a 05 number is not listed there, it is normal: it is not registered as a value-added service. Its absence from the directory confirms that it is a classic geographic number, without surcharge.
If there are persistent doubts about a received call, searching for the complete number in a search engine often helps identify the company or call center using it. Several forums and community sites list numbers reported as unwanted.
Mobile plans and calls to 05: cases where the bill may increase
Consumer plans almost systematically include calls to geographic numbers (01 to 05) in mainland France as unlimited communications. The extra cost does not come from the called number, but from the calling situation.
- Very low-end plans or prepaid cards may charge calls to landlines by the minute, including to a 05
- A call from abroad to a 05 number is often treated as an international call, with specific pricing depending on the operator and country
- Calls from certain overseas departments to the mainland (or vice versa) may fall outside the “included” scope depending on the plan’s conditions
Checking the pricing conditions of your own plan remains more relevant than questioning the nature of the 05 number. The number is never surcharged; it is the context of the call that may incur an additional cost.
The next time a 05 number appears on the screen, the useful reflex is not to check if it is surcharged, but to verify who is behind it. A quick look at the reverse directory or an online search is enough to identify the caller, and the pricing of the communication remains that of a local call.