Netherlands Phone Number Format
Netherlands phone numbers use the country code +31. A Netherlands mobile number is 9 digits and is written 06 12345678 nationally, or +31 6 12345678 in international format. In E.164 (the format APIs expect) it is +31612345678, with no spaces or leading zero.
| Country | Netherlands |
|---|---|
| Country calling code | +31 |
| Example mobile (national) | 06 12345678 |
| Example mobile (international) | +31 6 12345678 |
| Example mobile (E.164) | +31612345678 |
| National number length | 9 digits |
Validate a Netherlands phone number
How to format a Netherlands phone number
- Start from the national number as written locally: 06 12345678.
- Drop the leading trunk digit (the national prefix, usually a leading 0) if present.
- Add the country code +31 in front to dial from abroad: +31 6 12345678.
- For APIs, SMS, and storage, use E.164, no spaces or dashes: +31612345678.
Frequently asked questions
What is the country code for the Netherlands?
The international calling code for the Netherlands is +31. You add it before the national number (dropping any leading 0) when dialing from abroad, for example +31 6 12345678.
How many digits is a Netherlands phone number?
A Netherlands mobile number has 9 digits in its national significant number (the part after the +31 country code). Example: 06 12345678.
How do I write a Netherlands number in E.164 format?
E.164 is the international standard most APIs and SMS gateways require: a plus sign, the country code, then the national number with no spaces, dashes, or leading zero. For the Netherlands that looks like +31612345678.
How can I check if a Netherlands phone number is valid?
Paste the number into the validator above. 1Lookup parses it, checks it against the Netherlands's numbering rules, and returns its line type and carrier so you know whether it is real and reachable.