Block unwanted calls in your company

Blacklisting” or call blocking is a feature offered by Kavkom that allows you to block or unblock unwanted or malicious calls in your communication system, whether from a cell phone, a blacklisted IMEI number, an iPhone or your telephone network.
By adding phone numbers to the blacklist, you can effectively prevent loss of productivity, intrusion attempts, phone spam, calls from stolen or lost phones, and fraudulent activity. It also includes verification of your mobile device’s IMEI to ensure it is not blacklisted. This free service is just a click away on our Kavkom interface.
What is VoIP blacklisting?

A VoIP blacklist is an essential tool for any company wishing to protect its telephony systems from unwanted, fraudulent calls, or calls from phones with blacklisted IMEIs. This includes the ability to check the status of lost or stolen phones and other mobile devices. By adding phone numbers to this blacklist, you can automatically block or unblock calls from these numbers, reducing interruptions and improving business productivity.
Imagine technicians and system administrators from a wide range of sectors adopting this solution: they can benefit from simplified call management, while maintaining a high level of security. Do you want to ensure that your company is not disturbed by unsolicited calls? You can easily configure and manage your blacklisted mobile number list with Kavkom.
Kavkom VoIP Blacklist features
Adding and managing blacklisted numbers
Kavkom makes it easy to add and manage unwanted phone numbers, thanks to an intuitive user interface. You can add a phone number to the blacklist in just a few clicks, directly from your dashboard, whether it’s a fixed or cell phone number, or a blacklisted IMEI number. This feature lets you block or unblock unwanted calls quickly and efficiently, whether they come from mobile or landline phones, or from blacklisted IMEI devices, ensuring uninterrupted communication for your business. You can also check the status of each number and device for more precise management.
Managing blacklisted numbers is simplified, allowing you to modify, delete, unblock or update numbers at any time. By integrating this feature, your company can significantly improve productivity by avoiding distractions caused by unsolicited calls.
Real-time call filtering and blocking
Kavkom’s real-time filtering system immediately blocks unwanted calls. When a blacklisted phone number attempts to contact your company, the call is automatically rejected, ensuring that only relevant calls reach your teams. This feature is particularly useful for call centers and companies with a high volume of daily calls. You can also use this feature to check calls from phones with blacklisted IMEIs.
Reports and statistics on blocked calls
Kavkom offers advanced reporting tools for analyzing individual blocked calls. You can view detailed statistics on blocked numbers, the number of rejected calls, the reasons for blocking, as well as mobile devices whose IMEI is blacklisted. These reports enable you to adjust your blacklist rules for optimum protection against unwanted calls. Thanks to this data, you can make decisions based on concrete information to improve your communications management. Reports include IMEI blacklist checks to ensure that all devices are properly monitored.
The benefits of blacklisting
Protection against security threats
By blocking suspicious or malicious numbers, Kavkom’s “Blacklist” protects your company against cyber attacks, phone scams, phishing attempts and calls from cell phones with blacklisted IMEIs. What’s more, you can use this feature to check the status of mobile devices and ensure that all your own company phones are secure.
Disturbance Reduction
By avoiding unwanted calls, you can keep your team productive by reducing unnecessary interruptions and disruptions to your business communications.
Total control
Kavkom’s “Blacklist” gives you total control over the numbers you wish to block, allowing you to reject the call, indicate that your line is busy, play a waiting announcement or redirect the call to voicemail.
Call blocking for whom?
Call centers
Call centers are often faced with a high volume of unwanted calls, whether national or international in origin, which can disrupt their operations and reduce the efficiency of their agents. With Kavkom’s VoIP blacklist, these centers can easily add unwanted numbers to a blacklist, ensuring that these calls are automatically blocked. You can also check device IMEIs to avoid interruptions caused by blacklisted cell phones.
For example, a Paris-based call center was able to reduce interruptions by 40% by using VoIP blacklisting. This not only improved agent productivity, but also enabled them to focus on important calls and priority customers. System administrators from anywhere can integrate this unique solution to effectively manage communications and ensure better agent performance.
Medical clinics
For medical clinics, it’s crucial to maintain a clear, uninterrupted line of communication to manage appointments and emergencies. Unwanted calls can distract staff and disrupt patient management. Kavkom’s VoIP blacklist feature will help clinics block these calls, ensuring that staff remain focused on patient care.
Startups and SMEs
For startups and SMEs, every call counts. Unwanted calls, including those from blacklisted cell phones, can represent a waste of valuable time and limited resources. With Kavkom’s VoIP blacklist, these businesses can block unsolicited calls, allowing them to focus on growth opportunities and important customers.
Large companies
Large companies, with their high call volumes, need robust solutions to manage their communications. Kavkom’s VoIP blacklist offers a powerful solution for blocking unwanted calls, improving productivity and reducing interruptions.
Technicians and system administrators from all over the world can take advantage of this feature to optimize communication operations within large organizations. You’re invited to share this solution with your colleagues to maximize the benefits for your business.
Set up a blacklist with Kavkom

Kavkom, expert in business communication solutions, offers you a powerful “Blacklist” to protect your business communications from unwanted calls, blacklisted cell phones and security threats. With total control and easy management, you can ensure your team’s peace of mind while maintaining smooth, secure communication, even if blacklisted cell phones try to contact your company.
Frequently asked questions
How do I add a number to the blacklist?
To add a phone number to the blacklist, access your Kavkom dashboard, then go to the “Blacklist” section. Click on “Add a number”, enter the phone number you wish to block, whether it’s a fixed or cell phone, or a blacklisted IMEI, add a description or reason if necessary, and click on “Save”. You can also manage blacklisted numbers by modifying, deleting or adding new ones. Be sure to check the IMEI status of mobile devices to avoid any communication problems.
How does real-time call filtering work?
Kavkom’s real-time call filtering works by instantly blocking calls from blacklisted numbers. When a blacklisted phone number attempts to contact your company, the call is automatically rejected, allowing your teams to concentrate on relevant calls. This feature is particularly useful for companies with a high volume of daily calls.
What types of reports are available?
Kavkom offers detailed reports on blocked calls, including statistics on the number of rejected calls, blocked phone numbers, reasons for blocking, and calls from blacklisted IMEI devices. These reports help analyze unwanted call trends and adjust blacklist rules for optimal protection. Companies can thus make data-driven decisions to improve communications management.
Is it possible to customize blacklist rules?
Yes, you can customize VoIP blacklist rules to your company’s specific needs. You can define specific rules, such as blocking calls from certain regions or phones with blacklisted IMEIs, setting blocking times and creating whitelists for certain important numbers.
How long does it take to configure VoIP blacklist?
Setting up Kavkom’s VoIP blacklist is quick and easy. In just a few clicks, you can set up your blacklist. The procedure is intuitive and accessible, even for users without advanced technical skills. This blacklisting feature on our software is free of charge and included in your Kavkom VoIP telephony package.