🔒 Block unwanted callers

Call filter

Nuisance calls, telemarketers, robocalls — every business deals with callers they would rather not hear from. Each unwanted call wastes time, breaks concentration, and blocks the line for real customers.

CallFactory’s call filter gives you full control over who gets through to your team. Block specific numbers, allow only authorised callers, or reroute certain numbers to a different destination. All managed from the dashboard, effective immediately, and included free with every number.

Block individual numbers or number ranges
Allow only authorised callers (whitelist mode)
Reroute specific callers to a different destination
Trace and block anonymous callers

Benefits call filter

See how our smart tools help your team work more efficiently, save valuable time, and elevate the way your business communicates.

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Authorised callers only

Your colleagues deal only with authorised callers — customers, partners, and suppliers who belong on the line. The difference in professionalism and efficiency is noticeable on every call.

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Better concentration

Unwanted calls are distracting. The call filter ensures your team stays focused on providing excellent service instead of fielding nuisance calls.

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Better service

Fewer interruptions and lower time pressure allow your colleagues to give each caller the attention they deserve, consistently.

How the call filter works

The call filter sits between your CallFactory number and your team. When a call comes in, the system checks the caller’s number against your filter rules before the call is forwarded. If the number is blocked, the caller hears a busy tone or a message — they never reach your team. If you run the filter in whitelist mode, only numbers on your approved list get through.

You manage the filter from the CallFactory dashboard. Add or remove numbers individually, or block entire number ranges if you are receiving nuisance calls from a pattern of numbers. Changes take effect immediately — no waiting, no support ticket needed.

Block anonymous and hidden callers

Some nuisance callers hide their number. That makes it harder to block them directly, but not impossible. Share the date and time of the call with our support team and we trace the anonymous number for you. Once identified, we add it to your call filter and those calls stop getting through.

If your business has no reason to receive anonymous calls at all, you can choose to block all calls with a hidden number. This is particularly useful for businesses that deal exclusively with known customers or partners.

Reroute instead of block

Blocking is not always the right answer. Sometimes you want a specific caller to reach a different person or department instead. The call filter can reroute individual numbers to a separate destination — a dedicated account manager, a complaints line, or a voicemail box.

This is useful for high-maintenance callers who need special attention, VIP clients who should bypass the queue, or internal numbers that should go straight to a specific team member. You set the routing per number, and the caller never notices the difference.

Temporary filters for specific situations

Not every filter needs to be permanent. If you are running a campaign and receiving a spike of irrelevant calls, you can activate a temporary filter for the duration. When the campaign ends, remove the filter and return to normal.

Temporary filters are also useful during office moves, holiday periods, or any situation where your call patterns change temporarily. You stay in control without making permanent changes to your setup.

Included free with every number

The call filter is included at no extra cost with every CallFactory number.

This feature is included free with every business number or International number.

API integrations

Tell us what you need, we build the endpoints. Our private API lets you integrate CallFactory telephony into your own software — no generic library, no guesswork, no wasted development time.

Calendar-based call routing

Automatically route calls based on your schedule. Office hours, rotating shifts, holidays, and on-call rosters — calls always reach the right person at the right time.

Call forwarding

Forward incoming calls to any landline, mobile, or team. Set rules based on time and availability — manage everything from your dashboard.

Yes. Add the number to your block list through the dashboard and it takes effect immediately. The caller will hear a busy tone or a message — they will not reach your team.

Yes. If you are receiving nuisance calls from a pattern of numbers, you can block an entire number range rather than adding each number individually.

Share the date and time of the call with our support team. We trace the anonymous number for you and add it to your filter. You can also choose to block all anonymous calls entirely if your business has no reason to receive them.

Yes. In whitelist mode, only numbers on your approved list get through. All other callers are blocked. This is useful for businesses that work exclusively with known clients or partners.

Yes. Instead of blocking, you can reroute specific numbers to a different destination — a separate team member, a complaints line, or a voicemail box. The caller does not notice any difference.

No. The call filter only works on incoming calls to your CallFactory number.

Yes. You can add and remove filters at any time. This is useful during campaigns, office moves, or holiday periods when your call patterns change temporarily.

No. The call filter is included free with every CallFactory number.