Most reported 01XX numbers
20 numbers with prefix 01
What does the 01 prefix mean in France?
Numbers starting with 01 are the landline numbers of Île-de-France, the Paris region. This prefix covers Paris (75) and the surrounding departments. Historically, Paris phone numbers began with the digit 1, hence this prefix. Calls from an 01 number may come from individuals, businesses, government agencies, or automated calling services based in the Paris region.
Suspicious calls from a 01 number: what to do?
Receiving a call from an unknown 01 number does not necessarily mean it is dangerous — but it pays to stay vigilant. Best practices: do not call back an unknown number without identifying it first. Never share personal information, banking details, or passwords over the phone, regardless of what the caller claims. If the call seems suspicious (pressure tactics, urgency, requests for money, identity impersonation), hang up immediately. Report the number on TelCheck to help the community. If you have been a victim of fraud, file a report online at cybermalveillance.gouv.fr or directly with law enforcement.
Prefix 01 details
- Line type
- Landline
- Operator(s)
- Fixed-line operators
- Region
- Île-de-France (Paris region)
- Format
- 01X XX XX XX
Other prefixes