5 Best Phone Number Databases for the Netherlands in 2026

TL;DR

The best phone number database Netherlands buyers can pick is the one whose numbers connect and whose origin you can explain to the ACM or the Autoriteit Persoonsgegevens, not the one with the largest record count. Here is the short version.

• Best for filling Dutch gaps across sources: SyncGTM, waterfall across 50+ providers
• Best for phone-verified European mobiles: Cognism, quote-based, vendor-claimed screening
• Best for EU-hosted company data plus direct dials: Dealfront, now Leadfeeder-branded, Activate from EUR 369/mo annual
• Best budget LinkedIn-extension workflow: Kaspr, from EUR 45 per user
• Best quick lookups: Lusha, public pricing from USD 49.90/mo

Phone Number Database Netherlands: The Legal Ground Rules

Dutch cold-calling rules turn on one question: is the person you are dialing a natural person or a company? We read the statute and the regulators' own pages for this section. It is general information, not legal advice, so confirm with Dutch counsel.

Telecommunicatiewet Article 11.7: consent for natural persons

Article 11.7 of the Telecommunicatiewet (version valid from 15 August 2026 on wetten.overheid.nl) bans automated calling systems, fax and electronic messages for unsolicited commercial communication unless the sender can show prior consent. Paragraph 2 extends that consent rule to other means, which covers live calls, when they reach natural persons.

The Autoriteit Persoonsgegevens reads it plainly: organisations need prior consent from natural persons, which it lists as consumers, sole traders (eenmanszaken) and VOFs, for telephone sales. Even with consent, you must offer a way to object on every call, and once someone objects you may not call again.

How B2B calls to companies are treated

For a company (rechtspersoon), or a natural person acting in their profession, paragraph 3 removes the consent requirement where the party published contact details meant for receiving this kind of communication and you use them accordingly. The AP spells out the telephone version: if a business has published its details and it is clear they may be used for telephone sales, such as a number dedicated to offers, you can use them for telemarketing.

Two practical effects follow. A switchboard number of a BV is a far safer target than the personal mobile of a sole trader. And the AP notes the telemarketing rules do not apply to company data that cannot be traced to individuals, though the moment a number is tied to a named person the GDPR (AVG) applies as well.

The Bel-me-niet Register: what changed

Many guides still tell you to scrub lists against the Bel-me-niet Register. On wetten.overheid.nl, Article 11.8, the provision that held those rules, is marked as lapsed from 1 July 2021. The AP's telemarketing page now describes a consent-first system for natural persons rather than a registry check. We could not confirm from a primary source how the register is run today, so treat any vendor that sells "Bel-me-niet scrubbing" as something to question, and keep your own consent and objection records.

ACM and the Autoriteit Persoonsgegevens: two enforcers

The ACM supervises the Telecommunicatiewet and, in its guidance, says consent must be specific, personal and clearly recorded in a way that links to the person called. A process description or a call list is not proof. The AP supervises personal data under the AVG and the UAVG. Because your number reached you through a vendor, Art. 14 GDPR also applies: tell the person who you are, why you hold the data and where it came from, within one month or at first contact.

One more telephone rule worth knowing: paragraph 8 of Article 11.7 bars you from using caller-ID blocking on these calls, and the AP says anonymous calls are forbidden. Leave your number visible. For the wider market, see our guide to the best B2B databases for the Netherlands and the Benelux B2B database roundup.

KvK Data Is a Starting Point, Not Permission

The Kamer van Koophandel (KvK Dataservice) is the source for Handelsregister data: owners, enterprises, officers and establishments. Its page quotes a one-time connection fee of EUR 1,279 and per-product charges such as EUR 9.60 for a register extract, and it requires a SOAP connection with a PKIoverheid certificate. It is built for identifying companies, not for selling you dialable mobiles.

The legal point matters more than the price. The AP says a phone number listed in the KvK register does not count as consent for telemarketing, unless the entry explicitly says it is meant for that. So a KvK-linked database gives you a reliable legal entity, SBI code, headcount band and officer names. Whether you may ring the number attached to it is a separate question you answer with the rules above.

When a vendor advertises "KvK-verified phone numbers", ask which field is KvK-verified: the company, the officer, or the number. Usually it is the first two.

Dutch Mobile, Geographic and 085/088 Numbers

A vendor's headline fill rate rarely says which kind of number it counted. In the Netherlands the buckets look like this.

• Mobile (+31 6 or 06): the best chance of reaching a person, and the highest privacy exposure when it is a sole trader's personal phone.
• Geographic landline (010, 020, 030 and so on): tied to a location and usually an office, so easier to justify, but often routed to reception.
• Non-geographic business lines (085, 088, 0800): common for companies running cloud telephony, which means a "direct line" may land on a call-routing menu.

Ask every vendor to tag each returned number by type and to report the share of your sample that was a mobile versus a main line. A fill rate padded with switchboards will feel very different once your reps start dialing, and one comparison we read puts a 3 percent switchboard connect rate against 20 percent for verified direct dials, a figure it did not source.

1. SyncGTM

SyncGTM is a GTM data platform best suited for Benelux teams whose first-choice database keeps returning blanks on Dutch contacts. It waterfalls phone enrichment across 50+ providers, trying the next source whenever one has no number.

That matters here because Dutch SMEs and owner-managed BVs are thin in global databases, and the same contact often exists in a second or third source. A waterfall raises match rates on contacts any one vendor misses, and results sync to Salesforce, HubSpot, Pipedrive, Attio and Close. Teams that export company lists from KvK-derived sources can run those through SyncGTM to add contact data.

SyncGTM does not decide your legal basis. Record why a B2B call falls under the company exception, and keep your Art. 14 notice ready before dialing. See how the approach works in our waterfall phone finder roundup or estimate spend with the credits estimator.

Pros

• Queries 50+ providers in sequence for higher Dutch fill rates
• Native sync to Salesforce, HubSpot, Pipedrive, Attio and Close
• Sits beside a primary database to fill its gaps
• Free tier to test on your own Dutch list

Cons

• It enriches contacts you specify rather than selling a static list
• Documenting your calling basis is a step you own

Best for: Dutch and Benelux outbound teams that need mobiles and direct lines for contacts a single database misses.

Pricing: Free tier available. See the pricing page for current plans.

2. Cognism

Cognism is a Europe-first sales intelligence platform best suited for Benelux SDR teams that spend the day dialing mobiles and want a compliance page to hand to their legal contact.

On its pricing page Cognism sells two prospecting packages, Standard and Pro, five seats each. One credit reveals one contact, and Pro adds on-demand mobile verification plus a higher-quality mobile dataset. It publishes no prices, only a personalised quote, so any EUR figure you read elsewhere is an estimate.

The compliance page states a legitimate-interest basis under GDPR Art. 6(1)(f), says contacts are notified within GDPR timeframes, and says phone data is screened against 15 do-not-call lists, naming countries such as the UK, Germany, France and Belgium. The Netherlands is not on that list. That is not a gap in practice, since the Dutch consumer opt-out register no longer sits in the statute, but ask what Cognism does for Dutch sole traders, who the Dutch rules treat like consumers. Claims about connect-rate uplift are vendor figures we did not reproduce.

Pros

• Phone-verified mobile product built for European calling teams
• Published compliance page covering lawful basis, notification and opt-out
• On-demand mobile verification on Pro

Cons

• Quote-only pricing, so budgeting needs a sales call
• Dutch screening is not named on the compliance page

Best for: Benelux and EMEA SDR teams with budget that live on the phone.

Pricing: Quote-based (Standard and Pro). Check current pricing with Cognism.

Read the full Cognism review.

3. Dealfront

Dealfront is an EU-hosted go-to-market platform best suited for DACH and Benelux teams that want company-level intent next to contact data from one European vendor.

One thing to know first: dealfront.com now redirects to leadfeeder.com, whose pages say Dealfront is now Leadfeeder, with Dealfront Group GmbH as the legal entity. The pricing page we read is therefore Leadfeeder-branded. It lists Activate from EUR 369 per month billed annually (EUR 527 monthly), and says Activate includes verified emails and phone and enriches contacts with direct dials using credits. It does not say whether those include mobiles.

On the Dealfront page, the vendor says its data is built and hosted in the EU, draws on national trade registers and chambers of commerce, and covers 60M companies and 400M verified contacts. Those are vendor claims. Neither page names the Netherlands, Benelux or KvK, so ask for a Dutch sample before you trust the registry angle.

Pros

• EU hosting and a registry-based company data pitch suit Dutch buyers
• Company identification and contact enrichment in one platform
• EUR pricing with a free Lite tier on the pricing page

Cons

• Brand transition makes it harder to tell which page describes which product
• No Dutch or mobile-specific statement on the pages we read

Best for: Teams that want EU-hosted company data and direct dials from the same vendor.

Pricing: Per the Leadfeeder-branded page: Discover from EUR 79/mo annual, Activate from EUR 369/mo annual, Scale from EUR 599/mo annual. Check current pricing with the vendor.

Read the full Dealfront review.

4. Kaspr

Kaspr is a LinkedIn Chrome extension that returns contact details, best suited for individual reps who prospect profile by profile and want EUR pricing.

Kaspr's pricing page lists Starter at EUR 45 (alongside EUR 59) and Business at EUR 79 (alongside EUR 99) per user, without labelling which figure is monthly. Free includes 5 phone credits a month, Starter 100 a month and Business 200 a month. Extra phone credits are sold in packs, so read the current per-credit rate on the page before budgeting.

Every plan is described as GDPR and CCPA aligned, and the page says nothing specific about the Netherlands. In France the regulator fined Kaspr EUR 240,000 in December 2024 over how its data was gathered. That is a French decision, but the questions it raised about LinkedIn visibility settings, retention and notification apply to anyone buying this kind of data in the Netherlands, where the Autoriteit Persoonsgegevens enforces the same GDPR.

Pros

• EUR pricing and a free plan with 5 phone credits per month
• Fits solo prospecting from LinkedIn profiles
• Low entry price per user

Cons

• 100 to 200 phone credits a month is thin for daily dialing
• Sourcing questions raised in France deserve answers before you buy

Best for: Individual reps on a budget who work from LinkedIn profiles.

Pricing: Free (5 phone credits/mo). Starter EUR 45 or 59 per user, Business EUR 79 or 99 per user. Enterprise custom.

Read the full Kaspr review.

5. Lusha

Lusha is a self-serve lookup tool best suited for reps who want a number from a LinkedIn profile in a few clicks and can live with USD billing.

Lusha's pricing page is in USD only. Revealing a phone number costs 5 credits while a verified email costs 1, so Starter's 400 monthly credits stretch to about 80 numbers, and Free's 40 credits to 8.

The page carries no GDPR statement and links out to a privacy policy. Run a Dutch sample, then ask where a returned number came from, because you need that answer for your own Art. 14 notice.

Pros

• Public pricing and a free plan
• Fast ad hoc lookups
• Credit model that is easy to forecast

Cons

• USD-only pricing and 5 credits per phone reveal
• No GDPR or Netherlands statement on the pricing page

Best for: Solo reps and small teams doing light Dutch lookups.

Pricing: Free (40 credits/mo). Starter USD 49.90/mo, Pro USD 69.90/mo, Premium USD 399.90/mo on monthly billing; annual billing is cheaper.

Read the full Lusha review.

Side-by-Side Comparison

Prices and statements come from each vendor's own pages and change often, so confirm before buying. We did not run a hands-on test of Dutch mobile hit rates for this guide, so coverage notes are vendor claims or page contents, not our measurements.

Cost per Number: Our Arithmetic

Published credit rules allow a best-case estimate. These are our calculations from vendor pages, assuming every credit goes to phones and every lookup succeeds, so real cost is higher.

• Lusha Starter: 400 credits at 5 per phone gives 80 numbers, about USD 0.62 each on USD 49.90 monthly billing.
• Kaspr Starter: 100 phone credits for EUR 45 is about EUR 0.45 each if one credit equals one number.
• Dealfront Activate: the page ties direct dials to credits but does not say how many credits one number costs, so we cannot compute a figure.
• Cognism: no public price, so ask for cost per revealed mobile in your quote.

Divide the plan price by numbers that connected and that you may lawfully call. That figure, not the sticker, is your cost per usable number.

How to Test a Dutch Phone Database

Pull 300 Dutch contacts from your real ICP, mixing Randstad scale-ups with regional mkb firms, and run the same list through each trial.

1. Count results by type: +31 6 mobile, geographic landline, 085/088 line, switchboard
2. Flag sole traders and VOFs, since the consent rule treats them like consumers
3. Ask for the source of a sample of numbers, which you need for Art. 14 and for access requests
4. Dial 50 only where you can justify it, and log connect rate and wrong-person rate

Keep a short note per segment on why the call falls under the company exception. If the ACM or the AP asks, that note and the vendor's source answer are your record.

How to Choose

If your reps dial all day and budget allows, test Cognism against a cheaper tool on the same sample, and see our Cognism alternatives for the wider field. If you want EU-hosted company data first, ask Dealfront for a Dutch sample. Solo reps on LinkedIn can compare Kaspr and Lusha, and our Lusha alternatives list covers more options.

If one vendor keeps missing your Dutch contacts, a waterfall such as SyncGTM fills the gaps. For neighbouring markets, see our German phone number database guide and the French phone number database guide. For cold email to Dutch companies, our email database Netherlands guide covers article 11.7 and the AP view.