Your phone displays a number starting with 09. Should you answer? Should you call back if you missed it? The 09 prefix is associated with non-geographic VoIP (Voice over IP) numbers in France. While they have entirely legitimate uses, they are by far the most frequently flagged prefix in canvassing abuse reports submitted to the TelCheck community. This guide helps you make sense of them.
What is a 09 number?
Numbers starting with 09 are called non-geographic because their allocation is not tied to a specific territorial zone in metropolitan France. They are assigned by ARCEP to VoIP service operators — telephony delivered over the internet. A 09 number can therefore be used from anywhere in the world as long as the subscriber has an internet connection and a VoIP service registered in France. Legitimate users include businesses with VoIP phone systems, remote workers with a dematerialised professional number, start-ups, associations, and freelancers who want to separate personal and professional calls.
Why is 09 so popular with canvassers?
The cost of acquiring a 09 number is very low — often a few euros per month — and numbers can be obtained in bulk. A call centre can hold hundreds of 09 numbers, change them frequently to avoid being blocked, and place thousands of calls per hour at minimal cost. According to data aggregated by the TelCheck community, 09 numbers account for a disproportionately large share of canvassing reports relative to their overall share of the national numbering plan.
Warning signs specific to 09 numbers
- Unsolicited call with no voicemail left.
- The caller cannot quote your contract number, your full name, or a specific reference.
- Pressure to make an immediate decision (time-limited offer, manufactured urgency).
- The number is flagged with a high score on TelCheck.
Should you answer a 09 call?
Best practice is to search the number on TelCheck before calling back if you missed the call. If you answer live and the call seems suspicious, hang up without providing any personal information. If the TelCheck check reveals numerous reports of canvassing or scamming, ignore the number and add your own report to help the community. If the number is clean, you can consider calling back — a voicemail or follow-up email will help you verify the caller's identity.
ARCEP's position and your rights
ARCEP monitors abnormal call volumes and can issue formal notices to operators hosting numbers used in abusive campaigns. If you identify an intensive canvassing campaign from 09 numbers, you can report it directly to ARCEP (arcep.fr) as well as via Signal Conso (signalconso.gouv.fr). Register on Bloctel (bloctel.gouv.fr) to reduce unsolicited commercial calls from all number types.