DNS Explained: Which DNS Server to Use in Belgium

DNS is the internet's phone book: it turns a website name into an IP address, and the server that answers your lookup is called a resolver. By default that is your provider's. You can replace it with Google's, Cloudflare's or Quad9's in five minutes, without touching your fibre speed.

What is DNS, exactly?

DNS stands for Domain Name System. Machines talk with IP addresses, strings of numbers; humans remember names. DNS does the translation. Jon Postel and Paul Mockapetris designed it at DARPA's request, the first implementation dates from 1983 and the current standard rests on RFC 1034 and 1035 from 1987.

One technical detail deserves a sentence: the device asking the question does not walk the whole DNS hierarchy itself. It hands that job to a recursive resolver, which goes down from the root to the server that is authoritative for the name, then remembers the answer for a duration set by the name's owner, the TTL (Time To Live).

What happens when you type a website address?

Four steps, in a fraction of a second.

1. Your browser or operating system first looks in its own memory: if the name was resolved recently, it keeps the address.
2. Otherwise, the question goes to the configured resolver, by default the one on your box or router.
3. The resolver checks its own cache; failing that, it queries the DNS hierarchy.
4. The answer comes back, and the browser opens the connection to the IP address it got.

That intermediate memory explains two common symptoms. A site that just moved host can stay unreachable or show the old version for as long as the TTL lasts. And a slow DNS almost never shows on a site you already visited.

Short, then. Very short.

DNS Belgium is not a DNS server

Searches on this topic are polluted by a namesake. DNS Belgium is the registry for .be, .vlaanderen and .brussels domain names: it counts over 1.5 million .be names and assigns them through registrars. It does not resolve your lookups and you have nothing to configure with it. If your goal is to change the DNS of your connection, there is no account to create.

Provider, Google, Cloudflare, Quad9: what is the difference?

The addresses below come from the providers' official pages, checked on 4 November 2026. The "filtering" column summarises what those pages say, not a test of mine.

Quad9 variants worth knowing: 9.9.9.11 enables ECS, an option for finer geographic answers, and 9.9.9.10 removes blocking, reserved for experts according to the service page. In every case, enter two addresses from the same provider, never the same one twice: Google asks for this explicitly in its procedure.

Which DNS is the fastest?

No general ranking beats your own measurement, because the distance to the resolver depends on your provider and your region. I did not time these services on a Belgian line for this article; here is how to do it in two minutes.

• On Linux or macOS, type dig example.be @8.8.8.8, then the same call with @1.1.1.1, @9.9.9.9 and your box's DNS address. The "Query time" line gives the delay in milliseconds.
• Repeat each call three times: the first fills the resolver's cache, the next ones measure the remembered answer.
• Test a name nobody visits (a rare site) to see the slowest case, and a very well-known name for the everyday case.

On Windows, nslookup gives the answer but not the delay; the simplest route is an online DNS benchmark tool.

Which DNS protects privacy best?

A resolver sees the list of names you ask for, hence your whole browsing pattern, even if it cannot see page contents. Changing resolver moves that visibility from your provider to Google, Cloudflare or Quad9. It is a gain only if the new party is more transparent than the old one, and I have not settled it for you: logging policies are on each provider's privacy page, which my 4 November check does not detail for Quad9.

Two technical nuances. Classic DNS travels in clear text over your local network and your provider's; encrypted variants (DNS over HTTPS or over TLS) hide the questions at that level, but not from the resolver itself. And malware filtering, as with Quad9 or Cloudflare's 1.1.1.2 variant, protects against some booby-trapped sites without ever replacing an antivirus.

Belgian DNS blocking: why the resolver you pick is not neutral

In Belgium, DNS is also a tool for enforcing court decisions. The timeline, according to TorrentFreak and the anti-piracy body BAPO's decision:

The source article does not give the year for August and September; I infer it from the suspension still being in force in February 2026. The number of domains covered by the DAZN injunction reportedly rose from 58 to 258.

For a subscriber the consequence is simple: a public DNS is no longer the reliable escape hatch it used to be, because Google, Cloudflare and Cisco have been targeted. And this article is not a how-to for getting around a court decision.

How do you change DNS on a device or on the router?

Two levels, with different effects.

On a device. In Windows, macOS, Android or iOS, open the Wi-Fi or Ethernet network settings, find DNS and switch from "automatic" to "manual". Enter two addresses from the same provider, then test by opening one site by name and another by IP address. Note the original settings first so you can go back, as Google recommends.

On the router. The change then applies to every device on the network, including the TV and the console, which often have no DNS menu. This is where the provider's box gets in the way: on Proximus's b-box 3, a forum moderator answered in May 2018 that DNS was "hardcoded" and suggested going through a third-party router with a PPPoE session. That is feedback on an older box generation, and I could not verify that it holds for the current Internet Box; for Telenet, Orange and VOO, I found no official source. If your box refuses, the workaround is in our article on replacing the box with your own router.

Does another DNS change your speed?

No. DNS carries no download data: it only gives the starting address. A slow resolver adds a delay at the start of each new site, felt as a page that "thinks" before showing anything, but a file that downloads at 300 Mb/s will do so at 300 Mb/s with any resolver. To understand the gap between advertised and real speed, see how to test your speed properly and ping and latency.

Four common mistakes

• Entering a single address, or the same one twice: if it stops answering, no site opens at all.
• Mixing providers for no reason: the first to answer wins, and filtering becomes unpredictable.
• Blaming DNS for weak Wi-Fi: a poor signal in one room is fixed with the band, the position or the cabling, not an address.
• Looking for an account at DNS Belgium to "change your DNS": that registry only serves holders of domain names.

To choose the plan that serves your address rather than your resolver, compare with our ranking of the best fibre internet plans. If your consoles show a strict NAT, the cause lies elsewhere, in the NAT type and sometimes in CGNAT.

Sources used, checked on 4 November 2026: documentation from Cloudflare, Google Public DNS and Quad9, TorrentFreak on DNS blocking in Belgium and on the February 2026 order, and the May 2018 Proximus forum thread on the b-box 3.