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DID numbers · NL +31

Netherlands DID Numbers for inbound and CLI

Local numbers in Netherlands that ring your SIP endpoint and double as verified outbound caller IDs. Order, document and route them from the portal.

Europe+31
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key_facts · nl
country_code
+31 · NL
national_len
9 digits after the trunk 0
mobile
06
fixed
020 Amsterdam · 010 Rotterdam · 070 The Hague
regulator
ACM (Authority for Consumers and Markets)
timezone
CET (UTC+1), CEST (UTC+2) in summer.
reviewed
2026-10-16

Overview

DID numbers to Netherlands

A DID (direct inward dialing) number gives you a real Netherlands number on your SIP trunk. It receives calls from local customers and, because you hold it, it is also the strongest caller ID you can present on outbound traffic to Netherlands.

Dutch geographic numbers and 085/088 company numbers are available. Geographic numbers require a local address; non-geographic numbers do not.

Since 2021 the Netherlands has been an opt-in market for consumer telemarketing. Most traffic is customer care, existing-customer calls and B2B.

Number formats
TypeE.164
Mobile+31 6 1234 567806 12345678
Fixed+31 20 123 4567020 123 4567
Non-geographic+31 88 123 4567088 123 4567

+31 followed by a 9-digit national number; 06 for mobiles.

Regulation · ACM

Caller ID rules in Netherlands

A practical summary for operations teams, not legal advice. Confirm current requirements with counsel before you launch.

Last reviewed

Caller-ID presentation

The Telecommunications Act requires a valid, assigned CLI and forbids suppressing it on telemarketing calls. Since July 2021, telemarketing to consumers needs prior consent unless the person has been a customer within the past three years. Dutch operators increasingly filter calls from abroad that present Dutch numbers without authorisation.

Opt-in telemarketing

Telemarketing calls to consumers require prior consent unless there is an existing customer relationship, and that exception is time-limited.

Number presentation

Marketing calls must present a valid, assigned number that can be called back.

Data protection

GDPR applies to call records and recordings; the Dutch DPA enforces it.

Calling hours

No statutory window, but consumer complaints guide practice towards weekday daytime and early evening.

Dialing & setup

Dialing Netherlands correctly

  • Drop the trunk 0: 020 123 4567 becomes +31 20 123 4567.
  • 088 and 085 numbers are popular company lines and display well as CLI.
  • An existing-customer relationship only covers calls within three years of the last purchase, and only for similar products.
  • Every telemarketing call must tell the person how to opt out of future calls.

Caller ID best practice

Present a valid Dutch number assigned to you, never suppress CLI on marketing calls, and keep proof of consent for every consumer contact.

Troubleshooting

Common SIP errors on Netherlands calls

  • 403

    Forbidden

    The CLI is invalid or a Dutch number was presented on unauthorised international-origin traffic.

  • 404

    Not Found

    The trunk 0 was kept after +31, or the number is out of service.

  • 486

    Busy Here

    The called party is busy.

Quality guidance

What healthy Netherlands traffic looks like

Dutch routes are among the cleanest in Europe. Persistent low ASR usually reflects list quality or consent problems, not the network.

40–58%

ASR

2.5–4min

ACD

2–4s

PDD

Typical ranges on healthy routes, as guidance only. Results depend on your lists, CLI reputation and campaign type. Live per-destination stats are in your portal.

Setup

Connect your DID number for Netherlands

Replace the placeholders in angle brackets with the values from your portal. Full trunk templates for each platform are in the portal after sign-up.

Asterisk inbound route+31
; extensions.conf — inbound Netherlands DID from CLIRoutes
[from-clirroutes]
exten => +31201234567,1,NoOp(Inbound Netherlands DID)
 same => n,Set(CALLERID(name)=NL support line)
 same => n,Goto(ivr-main,s,1)

; Present the same DID on outbound Netherlands calls once it is verified.

FAQ

Netherlands DID numbers: FAQ

Can’t find what you need? Our routing team answers within the hour, around the clock.

Is the Netherlands an opt-in market?

Yes. Telemarketing to consumers requires prior consent, with a limited exception for existing customers. We review campaign type before enabling Dutch outbound sales traffic.

Can I present a non-Dutch CLI?

You can present any valid number you are authorised to use, but Dutch numbers perform best and are easiest for recipients to call back.

What counts as an existing customer for Dutch telemarketing?

Someone who bought from you within the last three years. You may call them about similar products without new consent, provided you offered an opt-out when you collected their details.

Is the Bel-me-niet Register still used?

It has been largely superseded by the 2021 opt-in rule for consumers. Your own opt-out records and consent evidence are what matter now.

Can I present an 088 number?

Yes, if it is assigned to you. 088 numbers are common company numbers in the Netherlands and are trusted by recipients.

What documents do I need for Netherlands DIDs?

It depends on the number type. Many geographic numbers in Netherlands require proof of a local address or business registration; toll-free and non-geographic numbers usually need less. The portal lists requirements per number type before you order.

Other products in Netherlands

Nearby countries

Related guides

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Netherlands DID Numbers

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