How do you write mobile numbers in holland?

In the Netherlands, mobile numbers are typically written in the format +31 6 followed by seven digits. The "+31" is the country code for the Netherlands, and the "6" indicates that it's a mobile number. When formatting for local use, you can simply write it as 06 followed by the seven digits, omitting the country code. For example, a mobile number might look like +31 6 12345678 or 06 12345678.