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Number in 03: area code for northeastern France

The 03 area code designates landline numbers in northeastern France. This geographical area covers three major regions: Grand-Est, Bourgogne-Franche-Comté and Hauts-de-France. Validated by ARCEP, this premium rate-free number enables reliable local communication. It offers national and international accessibility thanks to the +33 3 format.
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Which departments use the 03 number?

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The 03 area code covers a vast regional area in north-eastern France. It designates landline telephone numbers in three major regions: Hauts-de-France, Bourgogne-Franche-Comté and Grand Est.

Here is the list of corresponding departments:

  • Hauts-de-France: Aisne, Oise, Somme
  • Bourgogne-Franche-Comté: Doubs, Jura, Haute-Saône, Territoire de Belfort, Côte-d’Or, Nièvre, Yonne
  • Grand Est: Ardennes, Marne, Bas-Rhin, Haut-Rhin, Meurthe-et-Moselle


Telephone numbering in these areas follows the international +33 3 format, validated by the regulatory authority.

The advantages of a number beginning with 03

An 03 area code offers many advantages for your company:

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Strengthening local roots

The 03 area code is used to :

  • Clearly identify your presence in the Northeast region
  • Get closer to your local customers
  • Create an image of trust for your prospects

National and international accessibility

Your home phone number :

  • Corresponds to International Telecommunication Union standards
  • To be reached from abroad with the prefix +33
  • Works on all types of networks (mobile and fixed)

Flexibility of use

Modern mobile telephony offers you :

  • The possibility of changing the regional code in the event of a move
  • Use on different devices (landline, mobile, app)
  • Simplified management of your business communications

How to use an 03 number effectively

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For your customer relations

An 03 number strengthens your local presence in the Bourgogne-Franche-Comté and Hauts-de-France regions. Your customers can reach you at no extra cost, thanks to the plans of the main telephone operators (Orange, SFR, Bouygues, Free). This national and international accessibility facilitates exchanges with all your contacts.

For your prospecting campaigns

The 03 area code significantly improves the effectiveness of your telephone campaigns. Prospects immediately identify the local origin of your calls, which increases the response rate. This strategy enables you to target your sales actions precisely by department.

To manage your communications

Portability guarantees that you keep your number even if you change operators. A centralized interface simplifies consultation and management of all your calls. The blocking system provides effective protection against unwanted numbers and scam attempts.

Activate your virtual number 03

Kavkom lets you quickly obtain a national 03 number for your company online, in just a few clicks. Our flexible telephony platform adapts to all your needs:

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Instant activation

Your line is activated immediately, with no obligation. You can choose your area code from the available departments. Our customer service team will help you every step of the way.

A complete solution for your business

Our cloud telephony software includes all the essential features:

  • Interactive Voice Server (IVS) for intelligent call routing
  • Click-to-call to trigger calls from your web browser
  • Integrated CRM for tracking all your customer communications
  • Call recording for optimal quality control


This solution integrates naturally with your existing tools:

  • Direct connection to leading CRMs: Hubspot, Zoho, Salesforce, etc.
  • Mobile applications to stay in touch everywhere
  • Compatible with all IP telephony systems


Centralized interface simplifies management:

  • Dashboard to view activity in real time
  • Detailed statistics on your communications
  • Intuitive configuration of your routing rules

Transparent, competitive rates

Our offer includes all essential voice services with no hidden costs. The numbering plan adapts to your budget and communication needs.

Advanced features included

Fonctionnalites standard telephonique

Intuitive configuration

Our virtual telephony solution offers :

  • Installation in 5 minutes with no technical skills required
  • Simplified configuration of your calling rules
  • Interface accessible from any connected device
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Powerful communication tools

Advanced features allow you to :

  • Easily block unwanted calls and cold calling
  • Locate the origin of incoming calls
  • View communication statistics in real time
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Comprehensive supervision

Kavkom helps you :

  • Display your team’s performance indicators
  • Efficiently track your prospecting campaigns
  • Control call quality with recording

Frequently asked questions about the 03 area code

What is the 03 area code in France?

03 is the telephone code for the Nord-Est region. It designates landline telephone numbers covering a geographical area from Territoire de Belfort to Hauts-de-France.

Numbers beginning with 03 are easily identifiable. Their origin is local and corresponds to northeastern France. Beware, however, that some calls may be cold calling.

The 03 area code covers the departments of two large regions:

  • In Bourgogne-Franche-Comté: Côte-d’Or, Doubs, Jura, Nièvre, Haute-Saône, Saône-et-Loire, Yonne
  • In Hauts-de-France: Aisne, Nord, Oise, Pas-de-Calais, Somme

VoIP telephony offers total flexibility for managing your numbers. Kavkom lets you :

  • Change area codes easily
  • Add virtual numbers with different codes (01, 02, 03, 04, 05)
  • Keep your existing number with portability


This means you can tailor your telephone presence to suit your needs, without any service interruptions or complex dealings with traditional operators.

According to the French numbering plan, a distinction is made between :

  • Business fixed-line numbers for companies
  • Mobile lines associated with a fixed-line number
  • Virtual mobile telephony solutions

Calls to 03 numbers are included in standard telecom packages. There are no additional costs, unlike for special numbers.

Would you like to activate an 03 number? Contact us for a free demonstration of our solution!

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