The blog explains the Netherlands phone number format, covering landlines, mobiles, toll-free, and premium numbers, along with domestic and international dialing rules. It details area codes, proper formatting for readability, and examples for calling from abroad. Businesses can improve professionalism, accessibility, and SEO by using correctly formatted numbers and local or virtual Dutch numbers for seamless communication.
Whether you’re planning a trip to Amsterdam or expanding your business across Europe, understanding the Netherlands phone number format is essential. Dutch phone numbers follow a logical structure, but they differ slightly between landlines, mobiles, and international calls.
This guide will help you understand how to format, dial, and manage calls in and out of the Netherlands in 2026 complete with examples, area codes, and business-use insights.
Basic Structure of a Netherlands Phone Number
A standard Dutch phone number follows this format:
+31 AA BBB BBBB
Where:
- +31 is the country code for the Netherlands
- AA is the area code (1–3 digits)
- BBBBBBB is the subscriber number (6–7 digits)
Examples:
- Amsterdam: +31 20 123 4567
- Rotterdam: +31 10 987 6543
- Mobile: +31 6 1234 5678
2. Landline Number Format
Dutch landline numbers vary in length depending on the area code.
- Total length (including area code): Always 9 digits (without +31).
- Area codes: Start with 0 when dialed domestically.
- Example domestic format: 020 123 4567
- Example international format: +31 20 123 4567
Common Area Codes by Region
| City / Region | Area Code | Example Number |
| Amsterdam | 20 | 020 123 4567 |
| Rotterdam | 10 | 010 234 5678 |
| The Hague | 70 | 070 345 6789 |
| Utrecht | 30 | 030 456 7890 |
| Eindhoven | 40 | 040 567 8901 |
| Groningen | 50 | 050 678 9012 |
Mobile Number Format
Dutch mobile phone numbers start with 06 when dialed domestically or +31 6 internationally.
Structure
- Format: 06 1234 5678 (domestic) or +31 6 1234 5678 (international)
- Mobile numbers always have 9 digits total (excluding +31)
- The second digit often indicates the provider range but has become portable across carriers.
Example Mobile Numbers
- +31 6 1234 5678
- +31 6 8765 4321
Toll-Free and Premium Numbers
The Netherlands uses specific prefixes for toll-free and premium-rate services:
- 0800 – Toll-free numbers (free for callers within the Netherlands)
- 0900 – General information and premium-rate services
- 0906 – Entertainment and chat services
- 0909 – Voting or competition lines
Example:
- Toll-free: 0800 1234 567
- Premium: 0900 9876 543
Dialing Formats: Local, National, and International
Dialing Within the Netherlands
When calling inside the Netherlands:
- Always dial 0 + area code + subscriber number.
- Example: 020 123 4567 (Amsterdam)
- Example: 040 987 6543 (Eindhoven)
Dialing the Netherlands from Abroad
To call a Dutch number from another country:
- Dial your international access code (e.g., 011 in the USA, 00 in the UK).
- Add 31 (the Netherlands country code).
- Remove the leading 0 from the area code.
- Dial the remaining digits.
Example:
- From the US to Amsterdam: 011 31 20 123 4567
- From India to Rotterdam: 00 31 10 234 5678
Netherlands Country Code and Prefix Rules
- Country Code: +31
- International Access Code (from Netherlands): 00
- Trunk Prefix (Domestic): 0
So, when dialing domestically, use the trunk prefix (0). When dialing internationally, drop the 0 and add +31.
Example Phone Number Formats
| Type | Domestic Format | International Format |
| Landline (Amsterdam) | 020 123 4567 | +31 20 123 4567 |
| Landline (Rotterdam) | 010 987 6543 | +31 10 987 6543 |
| Mobile | 06 1234 5678 | +31 6 1234 5678 |
| Toll-Free | 0800 1234 567 | +31 800 1234 567 |
| Premium | 0900 9876 543 | +31 900 9876 543 |
Netherlands Area Codes by Province (Quick Reference)
| Province | Example Cities | Area Codes |
| North Holland | Amsterdam, Haarlem | 020, 023 |
| South Holland | Rotterdam, The Hague | 010, 070 |
| Utrecht | Utrecht | 30 |
| North Brabant | Eindhoven, Tilburg | 040, 013 |
| Limburg | Maastricht | 43 |
| Friesland | Leeuwarden | 58 |
| Groningen | Groningen | 50 |
| Gelderland | Arnhem, Nijmegen | 026, 024 |
Formatting for Business and Online Use
Formatting numbers correctly on websites and marketing materials is key for usability and SEO.
Proper Display Formats
- Local: 020 123 4567
- International: +31 20 123 4567
- Mobile: +31 6 1234 5678
- Toll-Free: 0800 1234 567
Click-to-Call Example
This allows users to call directly from smartphones or VoIP apps.
Tips for Calling and Managing Dutch Numbers
- Always check the prefix: Domestic calls start with 0, while international calls start with +31.
- Avoid using spaces incorrectly: Maintain standard spacing for clarity and recognition.
- Use VoIP for international calls: More cost-effective than traditional carriers.
- Keep your number searchable: Use consistent formatting across platforms.
- Consider a local or toll-free number: Builds trust and reduces customer hesitation.
Why Accurate Formatting Matters
- Prevents failed calls due to incorrect prefixes or missing digits.
- Improves brand professionalism on websites, ads, and invoices.
- Optimizes SEO for local search results and business listings.
- Facilitates CRM integration and contact management.
Conclusion
Understanding the Netherlands phone number format helps you connect efficiently with individuals and businesses across the country. From Amsterdam to Rotterdam, correct formatting ensures your calls reach the right destination whether you’re dialing locally or internationally.
