Call filter
Are there callers you’d rather not allow to call a certain number, for whatever reason? You can easily block them with the call filter feature.
Want to block certain callers or give access to specific ones? With the call filter, you control who gets through - keeping your phone line open for the people who matter most.
- Works seamlessly with any phone provider
- Always reachable, even without internet
- Just pick up and start calling anytime
Benefits of Call filter feature
Discover how our features help you work smarter, save time, and improve how your business communicates.
Authorized callers only
Your colleagues only need to deal with authorized callers (for example, customers only). And that smile is noticeable on the other end of the line.
Better concentration
An unwanted phone call can be quite distracting for your colleagues. The call filter ensures that they remain optimally focused on their service.
Better service
Increased job satisfaction, improved concentration and reduced time pressure ensure that colleagues can provide better service.
See how it works
Watch a quick demo to see how setup, team usage, and key features keep your business reachable - anytime, from anywhere.

Activate Call filter
The call filter is included in the Belfabriek subscription. You can activate this block at any time without paying anything extra. Our numbers and extra features work with every telephone system and every telecom provider. So you don’t have to change anything in your current telephone infrastructure when you register a number with us.
Learn more about other features
Find more information about our features that can boost your business communications.
Call forwarding
Your phone number is a virtual number. This means every incoming call is connected to a device. This can be a landline or mobile.
Call insights
Want to speak to more callers and serve them better? Call statistics show if you’re meeting your goals. After all, measuring is knowing.
Call queue system
There are times when more people call than your team can handle. With the queue, you handle peaks easily.
Call filter FAQ
Get clear answers about Call filter and how they work for your business.
The call filter only works on incoming calls.
Contact our support team with the date and time of the call and we will investigate the anonymous number to add it to the call filter.
We can also temporarily activate a call filter for incoming calls.