Random Netherlands Address Generator

Mobile tel input for Netherlands

A mobile engineer is testing a tel keypad that should format +31 numbers. They generate dummy Netherlands rows, copy the phone field, and paste into the simulator. The Netherlands uses +31. Mobiles are 6 followed by 8 digits. These are invented. The address block sits beside the phone so a two-column profile screen has both. Nothing is dialed.

Dutch address format rules

A Dutch address takes two lines, plus the country if it's going abroad:

Voorbeeldstraat 12-II
1012 AB Amsterdam
NEDERLAND

• Street, then house number. Same order as Germany: Voorbeeldstraat 12, not 12 Voorbeeldstraat.
• House number additions. A letter (12a), a floor in Roman numerals (12-II or 12 II), or "hs" for the ground floor (12 hs) all show up. Many forms have a separate field for this, called the toevoeging.
• Postcode, then city. 1012 AB Amsterdam. The postcode always comes first on the second line.
• No province. Provinces like Noord-Holland aren't part of a postal address.

The Dutch postcode

A Dutch postcode is 4 digits, a space, then 2 capital letters: 1012 AB. The digits run from 1000 to 9999, so a postcode never starts with 0. The letter pairs SA, SD and SS aren't used. The first digits point to a region: Amsterdam codes mostly start with 10, Rotterdam with 30, The Hague with 25 and Utrecht with 35.

Here's the part that matters for testing. In the Netherlands a postcode plus house number is usually enough to identify one address. That's why so many Dutch checkouts ask for just those two fields and fill in the street and city automatically. Our postcodes are shaped right but invented, so that lookup won't find them.

Dutch phone number format

Dutch numbers are 10 digits at home, starting with 0. Internationally, drop the 0 and add +31. Amsterdam's 020 becomes +31 20, Rotterdam's 010 becomes +31 10 and The Hague's 070 becomes +31 70. Mobiles start 06 at home, which becomes +31 6 followed by 8 digits. You'll see +31 (0)6 written in signatures, but don't store the bracketed zero. Our phones follow the mobile shape and aren't real lines.

Dutch address bugs QA testers keep hitting

• Postcode field built for digits. A numeric input or a 5-digit US pattern rejects 1012 AB outright.
• Space and case. Users type 1012ab or 1012 ab. Accept both and normalise to 1012 AB.
• Autofill with no way out. If the postcode and house number lookup fails, there's no manual street field and the form dead-ends. Generated postcodes hit this every time, which makes them good for testing the fallback.
• Additions lost on save. A numeric house number field drops the "-II" or "a", and two flats in one building collapse into one address.
• Lowercase prefixes. Street names like van der Veldestraat start lowercase. Title-case functions "fix" them into Van Der Veldestraat.
• Apostrophe city names. The official names 's-Gravenhage (The Hague) and 's-Hertogenbosch start with an apostrophe. Capitalisation code tends to produce 'S-gravenhage, and some inputs reject the apostrophe entirely.
• Required State field. Dutch users have nothing to put there.

Use cases

• Dutch checkout testing, especially the postcode plus house number lookup and its manual fallback.
• Billing address in the Netherlands for payment sandbox runs, where the format needs to look right and nothing else.
• Figma mockups for Dutch users, where long compound street names and additions like 12-II test your layout.

FAQ