Europe
SIP Trunk Netherlands — +31 Termination & DID Numbers
The Netherlands is one of Europe's main interconnect points, with Amsterdam's exchanges carrying a large share of the continent's traffic. For numbers, 085 and 088 non-geographic ranges are a common alternative to area-bound 020 or 010 DIDs.
Overview
Routing calls to Netherlands
Traffic to Netherlands leaves our SBCs on more than one upstream carrier per prefix. If a leg toward Amsterdam or Rotterdam starts returning 503s or long post-dial delay, the next attempt goes to another carrier automatically. Calls to The Hague, Utrecht and Eindhoven follow the same failover logic.
Numbering in Netherlands is managed by ACM. We terminate to geographic, national, mobile and toll-free ranges and price each one separately on the rate sheet. Inside the country, numbers are dialled with a 0 trunk prefix. Strip it before you send the call, and send 31 followed by the national number.
For inbound numbers in Netherlands, plan on paperwork: proof of address and company or identity documents are usually required before a DID goes live. Termination needs no documents beyond normal account checks.
What you get
What you get in Netherlands
One account and one balance, with the same SBCs for termination and inbound numbers.
CLI route tier
Caller ID delivered end to end on +31 calls. Use it for sales, support and any traffic where answer rates matter.Non-CLI route tier
A lower-cost tier where caller ID delivery is not guaranteed. Suitable for internal or transactional traffic that does not depend on the CLI.Number types
Geographic, National, Mobile, Toll-free. DID availability varies by range and city.Codecs
G.711a/u and G.729 on every route, G.722 and Opus where the far end supports them. T.38 for fax.Channels on demand
Concurrent call limits are set per account and raised as your traffic grows. No fixed channel bundles.Multi-carrier failover
Every +31 prefix is mapped to more than one carrier. Failed attempts move to the next one automatically.
Number formats
How to dial Netherlands from your PBX
Send E.164 digits. The sample number below shows the format only.
| Format | Example | Notes |
|---|---|---|
| International (E.164) | +31 20 123 4567 | How the number is written and stored. |
| Sent from your PBX | 31201234567 | E.164 digits with no plus, prefixed by your tech prefix if your account uses one. |
| With 00 exit code | 00 31 20 123 4567 | Accepted on the trunk. We normalise it to E.164. |
| National format | 020 123 4567 | Dialled inside Netherlands. Strip the trunk prefix before sending. |
Compliance
Netherlands rules to know
What applies before your first call or your first DID goes live.
Compliance box
- Regulator
- ACM
- Caller ID
- A valid CLI that you are entitled to use is required on CLI routes. Spoofed or unallocated numbers are blocked.
- DID KYC
- Usually required
- Note
- Geographic DIDs usually need a local address or proof of presence in the number's area.
Rules change — our team confirms current requirements before activation.
Use cases
Who uses Netherlands routes
- 01
Pan-European support desks based in Amsterdam with local and 0800 numbers
- 02
Companies using 085/088 numbers for a single national presence
- 03
Logistics firms around Rotterdam linking depots onto one trunk
Setup
Start calling Netherlands in 3 steps
- 01
Top up $200
Open a prepaid account and add balance by USDT (TRC20), BTC or card. - 02
Add your trunk
Whitelist your PBX IP or create digest credentials, then point your outbound route at our SBC. - 03
Dial +31
Send 31 + national number in E.164 and check the CDR for your first test call.
Further reading: What Is a SIP Trunk? A Plain-English Guide for 2026
FAQ
Netherlands SIP trunk questions
What are 085 and 088 numbers?
Non-geographic numbers that are not tied to a city. 088 is aimed at companies with several locations.
Do Dutch geographic numbers need a local address?
Usually yes. The number should match where the user is based.
Who regulates Dutch numbering?
The ACM (Authority for Consumers and Markets) oversees telecom markets and numbering.
How do I format an Amsterdam number?
+31 20 followed by 7 digits. Drop the leading 0 when sending from the trunk.