Most reported 03XX numbers
20 numbers with prefix 03
What does the 03 prefix mean in France?
Numbers starting with 03 correspond to fixed lines in North-East France, covering Hauts-de-France, Grand Est, and Bourgogne-Franche-Comté. Major cities include Lille, Strasbourg, Metz, Nancy, Reims, Amiens, and Dijon. Although assigned to residents and businesses in this region, they can be ported and used over VoIP from anywhere.
Suspicious calls from a 03 number: what to do?
Receiving a call from an unknown 03 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 03 details
- Line type
- Landline
- Operator(s)
- Fixed-line operators
- Region
- North-East France
- Format
- 03X XX XX XX
Other prefixes