Network & carriers
Dutch numbers are issued by the ACM under a plan set by the Ministry of Economic Affairs; KPN, VodafoneZiggo and Odido (formerly T-Mobile and Tele2, renamed in 2023) run the main networks.
+31 · NL · UTC+1
Netherlands
Country Code & Virtual Numbers
The Netherlands' +31 code covers a 9-digit numbering plan where mobile numbers start with 6 and city codes are two or three digits, such as 20 for Amsterdam. Capital: Amsterdam · Business hours: 3:00 AM–11:00 AM EST.
// The Basics
What is the +31 country code?
Numbering in Netherlands is administered by Autoriteit Consument & Markt (ACM); numbering plan set by the Ministry of Economic Affairs.
Numbering format
Dutch numbers drop the leading 0 internationally — an Amsterdam number written domestically as 020 plus seven digits becomes +31 20 plus the same seven digits.
Calling culture
Dutch business culture is famously direct — calls tend to get to the point quickly, and lengthy small talk before business is less common than in many other markets.
Did you know
Dutch law doesn't make public holidays automatic days off — that depends on the employment contract or collective agreement, so some businesses stay open on them.
// Quick Facts
A quick read on Netherlands numbers.
Dutch numbers drop the leading 0 internationally, same as most of Western Europe — a domestic 020 number becomes +31 20 abroad.
From the US: 011 31 20 XXX XXXX
// Reference
Dialing +31: numbers, codes and rules
- Trunk prefix
- 0 — used domestically, dropped after the country code.
- Number length
- 9 digits (10 digits domestically including the leading 0)
- Mobile numbers
- 9 digits starting with 6 (06 domestically): +31 6 XXXX XXXX
- Landlines
- 9 digits; a 2- or 3-digit area code followed by the subscriber number: +31 20 XXX XXXX for Amsterdam
- Major area codes
- Amsterdam 20
- Rotterdam 10
- The Hague 70
- Utrecht 30
- Eindhoven 40
- Groningen 50
- Dialing in
- From the US: 011 31 20 XXX XXXX
- Dialing out
- 00 is the international prefix from Netherlands.
- Useful numbers
- Emergency (EU-wide): 112
- Toll-free prefix: 0800
- Non-geographic business numbers: 088
- Time zone
- CET (UTC+1); CEST (UTC+2) in summer
- Daylight saving
- Clocks go forward on the last Sunday of March and back on the last Sunday of October (EU rule).
- Working week
- Monday–Friday; weekend: Saturday–Sunday
- No law makes public holidays days off; it depends on the employment contract or collective agreement, so some businesses stay open.
- 085 numbers are non-geographic (often internet calling) and cost about the same to call as a landline.
- Many Dutch executives take long breaks in July, August and late December.
Reported scam patterns
- Fraudehelpdesk reported that telephone fraud doubled in 2024, often by callers posing as bank staff who spoof the bank's real number. source
Sources
- ITU-T E.164 national numbering plan for the Netherlands (links to Dutch law and ACM)
- Nummerplan telefoon- en ISDN-diensten (wetten.overheid.nl)
- Rijksoverheid – types of telephone numbers
- Rijksoverheid – official public holidays
- Time.is – Netherlands local time and daylight saving dates
- trade.gov – Netherlands Country Commercial Guide, business travel
- Fraudehelpdesk press release, 10 February 2025 (archived copy)
- RCR Wireless – T-Mobile Netherlands and Tele2 rebrand as Odido
Best time to call Netherlands from the US
Netherlands is on UTC+1 · Business hours = – EST · Mon–Fri
// Why a Virtual Number
Why get a Netherlands virtual number?
A +31 virtual number gives your business instant local presence in Netherlands — without the overhead.
Local caller ID in Netherlands
When you call from your virtual Netherlands number, contacts see a local +31 number — dramatically improving answer rates.
No office needed
Establish a local presence in Netherlands without renting space, hiring locally, or installing any hardware.
Instant credibility
Dutch business contacts are highly responsive to efficient, direct communication — a local number signals you're set up to work on their terms.
Routes to any device
Calls to your Netherlands number ring your team on mobile, desktop, or desk phone — wherever they work.
Free tools
Look up a number from Netherlands
Phone number checkerCheck the country and format of a number from Netherlands instantly.Phone number validatorValidate a number against its country's formatting rules (E.164).Carrier lookupCheck a number's country and format for free; live carrier data comes with the Lookup API.All country codesDialing codes, time zones and calling guides for every country.
Frequently Asked
Netherlands questions answered.
Answers about the Netherlands' ACM-regulated numbering, direct business culture, and getting a local +31 virtual number.
Dial 011 (the US exit code), then 31, then the national number, leaving out the leading 0 used for domestic calls. Number length: 9 digits (10 digits domestically including the leading 0).
Start calling Netherlands, not tomorrow.
Get a virtual Netherlands number or make direct international calls to +31 — active in under ten minutes.