About France phone numbers and SMS
French number format
France uses country code +33. Mobile numbers begin with 06 or 07 in national form and have ten digits written in pairs, as in 06 12 34 56 78. For international dialing the leading zero is dropped, so the E.164 form is +33612345678, nine digits after the country code. Landlines begin with 01 to 05 by region, and 09 is used for internet-based home lines, so the first two digits help separate mobiles from fixed services.
Operators
Four network operators cover the country: Orange, SFR, Bouygues Telecom and Free Mobile, the youngest of them, launched in 2012 with low prices that shook up the market. Plenty of virtual brands such as Sosh, RED by SFR and B&You are owned by those same groups. French overseas departments, such as Reunion or Guadeloupe, have their own codes and are not under +33 even though they are part of France.
Why services treat French numbers carefully
France has a long history of SMS-based banking confirmations, and the European payment security rules known as strong customer authentication pushed banks to confirm card payments with codes or app approvals. Those codes go to the number registered with the bank and cannot be redirected to a public inbox. Other sites, including marketplaces, may check whether a number looks like a normal consumer line, and some will decline numbers from bulk providers.
Local apps and sender conventions
The classifieds site Leboncoin, the secondhand marketplace Vinted, the health booking platform Doctolib and the supermarket and delivery apps of the big retail chains are all frequently verified by phone. French senders favour alphanumeric names, and regulators have introduced rules against spoofed sender names in order to curb scam texts. Messages are generally short and written in French.
Practical tips
Metropolitan France follows Central European Time and switches to summer time in spring, while overseas territories sit in other zones, from the Caribbean to the Indian Ocean and the Pacific. Codes expire quickly, often within ten minutes, so open the page before you request one. A shared inbox can be read by every visitor, which is why it fits only quick tests and disposable registrations rather than anything personal.