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Why fiber postal code checks sometimes differ per provider

If you want to know whether your home can get fiber, you will quickly end up doing a zip code check. KPN has one, Odido has one, Delta has one, and ODF also uses one. However, these checks do not always give the same answer. This can be confusing, but there is a clear reason for it: most network operators only show where their own network is being installed. In this article, we explain how this works and how you can get a good picture of the situation at your address.

An overview of a neighborhood with a small brick building in the center from which light blue lines extend to surrounding houses and apartments.What exactly does a fiber postal code check show?

A postal code check gives you an initial impression of what is possible at your address. After you have entered your postal code and house number, the check will verify, for example:

  • whether fiber is already available;

  • whether fiber is being installed;

  • which providers are permitted at your address.

Each provider does this based on its own network and data.

Why do the postal code checks from KPN, Delta, and ODF differ?

There are several fiber networks operating side by side in the Netherlands. The largest are:

These networks do not automatically work together. That is why each postal code check only shows what is possible within its own network.

Examples:

  • The KPN check only shows connections to the KPN network.

  • The Delta check provides information about the Delta Fiber network.

  • What you see in the ODF postal code check provides information about the Open Dutch Fiber Network.

Usually, this does not mean that there is no fiber connection, but that your home is not connected to that provider's network.

Why do I see fiber for one zip code check but not for another?

Even if you look at the same provider, zip code checks can still differ. The network check says that fiber are available, while the provider check reports something else. That seems strange, but it happens regularly. The causes are often simple:

  1. Different network administrators: Each check looks at its own network. Is your home on the ODF network, but are you using the KPN check? Then you won't see fiber there. This remains an important reason why answers vary.

  2. Providers that are not (yet) active on a network: A provider does not automatically provide services on every network. As a result, a provider check may say “no fiber,” even though the network is already ready.

  3. Different planning information: Networks are built in phases. One party may have already processed the latest updates, while another party is still behind. This can cause postal code checks to temporarily give different results.

Also read the article: What does a fiber network administrator do? The difference with an internet provider

Perform a reliable postal code check

Are you seeing different results when performing postal code checks? Always check with the network operator first. In many areas, this is Open Dutch Fiber. With ODF's postal code check, you can see whether your address is on the network, whether fiber is already available, and what the status of the installation is.

If you want to complete the picture, you can supplement this with information from your municipality. Municipalities often publish when fiber will be installed in streets and neighborhoods. By combining this information, you can be sure of where you stand and avoid confusion.

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