Cold calls: don’t hang up, try this foolproof method instead

We’ve all been there—the phone rings, you answer, and within seconds you realise it’s yet another cold caller. The instinctive reaction is to slam the phone down. But here’s the catch: hanging up isn’t the smartest move. There’s a better way to stop these calls for good.

Why cold calling is still alive

In theory, services like do-not-call lists should have solved the problem. In France, for instance, the Bloctel register was created to block telemarketers from contacting numbers that opted out. But despite hefty fines—up to €75,000 for individuals and €375,000 for companies—call centers continue to push their luck.

Strict rules on timing exist too: no calls before 10 a.m., after 8 p.m., during lunch hours, or on weekends unless you’ve agreed. Yet complaints keep piling up, proving that many operators simply ignore these restrictions.

How technology can help

If call-blocking registers aren’t enough, community-driven apps offer another layer of defense. Tools like Orange et Moi, available on both iOS and Android, allow users to flag nuisance numbers. Once tagged, they go straight into spam, and your phone doesn’t even ring.

Recent regulations also banned the use of hidden or private numbers for sales calls. In theory, callers must display a clear phone number. Even so, many still sneak through using 06 or 07 prefixes, normally reserved for personal mobiles, which only adds to the confusion.

The trick: spotting the prefixes

Here’s the foolproof part: the government has assigned specific prefixes for telemarketing numbers. Learn to recognize them, and you can spot a cold call before even picking up. In mainland France, these include:

0162, 0163, 0270, 0271, 0378, 0424, 0425, 0568, 0569, 0948, 0949

If one of these pops up, don’t waste your time. Just hit the red button and move on with your day. No confrontation, no frustration—just peace and quiet.

Why you shouldn’t just hang up

It may feel satisfying to cut someone off mid-pitch, but in practice, it doesn’t work. Call center staff are under intense pressure and are trained to call back repeatedly until they log a proper response. Hanging up just resets the cycle.

And while the calls are irritating, it’s worth remembering that there’s a person on the other end, often working long hours in tough conditions. Being cut off dozens of times a day is soul-crushing.

The smarter approach? Don’t pick up at all if you recognize a marketing prefix. It saves you the hassle and sends a clearer message than a hasty hang-up.

The bottom line

Cold calls are unlikely to vanish overnight, but by combining call-blocking apps, awareness of official prefixes, and a calm refusal to engage, you can reclaim control of your phone.

So next time your screen flashes one of those numbers, resist the urge to answer. Sometimes silence really is the most effective response.