How to Reduce Spam Calls to Your Business Line

Spam and robocalls are more than an annoyance for a business — every one you answer is time off the job, and every one you ignore might have been a real customer you were afraid to pick up. You can't stop them entirely, but you can cut the volume dramatically. Here's what actually works, roughly in order of effort versus payoff.

1. Turn on your carrier's spam filtering

Every major carrier now offers built-in spam labeling and blocking, often free:

• Look for your carrier's call-protection app or setting (most label suspected spam right on the incoming screen).
• Enable the option to block or silence calls flagged as likely spam, not just label them.

This is the lowest-effort, highest-return step. Turn it on first.

2. Use your phone's built-in screening

• iPhone: "Silence Unknown Callers" sends calls from numbers not in your contacts to voicemail. Powerful, but blunt — new customers are "unknown" too, so it's risky for a business line unless something else is catching those calls.
• Android: Google's Call Screen can answer unknown calls and make the caller state their purpose before your phone ever rings.

3. Register on the Do Not Call list

Add your business number to the national Do Not Call registry (donotcall.gov in the US). It won't stop scammers who ignore the law, but it cuts down on legitimate telemarketers and gives you standing to report violators.

4. Stop volunteering your number

A lot of spam traces back to your number being out in the open:

• Avoid posting your raw number in plain text on public pages where scrapers grab it.
• Be cautious handing it to directories and lead-gen sites that resell contact info.
• Consider a separate number for sign-ups and forms, kept apart from your main customer line.

5. Don't engage

• Don't press buttons to "opt out" of a robocall — it confirms a live number and often increases calls.
• Don't call back unknown missed calls from unfamiliar area codes.
• Report the worst offenders to the FTC; it feeds the enforcement data.

The limit of blocking — and the better approach

Here's the catch with every method above: they're all a trade-off between blocking spam and risking real callers. Crank the filters up and you start missing customers. Leave them loose and the junk gets through.

The approach that sidesteps the trade-off is to have something answer every call and screen it in the conversation. An AI receptionist picks up each call, recognizes and drops obvious spam and robocalls before they ever reach you, and still handles the real customers — booking, answering questions, or taking a message. You stop playing the "do I dare answer this unknown number?" game, because every call is answered and the junk is filtered out automatically.

GreetWise blocks sales calls, toll-free spam, and any number you choose, while making sure genuine callers always get through. See how spam blocking works or try it free for 14 days.