Your phone rings. You don’t recognize the number. Maybe you answer and hear silence. Maybe the caller starts talking about some service you never asked for. Before calling back, take a minute and check the number. It could save you a headache.

Search the Number Online

A plain web search is surprisingly useful. Put the full number into a search engine and keep the quotation marks around it. This tells the search engine to look for that exact number.

You may find reports from people who received the same call. Some pages collect complaints about unwanted numbers, while community forums often have surprisingly specific comments about what the caller said.

But don’t trust one random comment as proof. Look for a pattern. If several people describe the same behavior, that’s much more useful than one person saying, “Annoying call.”

• A cluster of complaints is a strong warning sign, especially when people describe the same pitch or message.

• One complaint alone isn’t much to go on, because legitimate numbers sometimes get reported by mistake.

• No search results? Don’t take that as a clean bill of health. New spam numbers appear constantly, so there may simply be no history yet.

Try a Reverse Number Search

You can also use a reverse phone lookup service to see whether the number is connected with a business or another known caller. Results vary, and some services charge for details, so I wouldn’t pay just because a strange number called once.

Honestly, free information is usually enough for the first check. If the number keeps calling, then digging a little deeper makes more sense.

Don’t Call Back Just to Find Out

Raj learned this the boring way. He got three missed calls from the same unknown number one Tuesday and nearly called back between meetings. Instead, he searched it first and found several spam reports. He stopped reopening the same five tabs every morning after that because the calls kept coming.

And that’s really the trick. You don’t need to investigate every mystery number like you’re solving a crime.

If the number looks suspicious, search it. If other people have reported the same behavior, block it. If the caller claims to represent your bank or another company, contact that company using the number from its official website or your statement, not the number that called you.

So, Is the Number Safe?

A number with no spam reports isn’t automatically trustworthy. That’s the part people forget. A scammer can use a fresh number today and get reported tomorrow.

Pay attention to how the caller behaves, too. Pressure is a bad sign. Requests for passwords or payment details are worse. And if someone wants you to act immediately because something terrible will happen otherwise, hang up.

Checking a number takes less than a minute. There’s no prize for answering a suspicious call just because your phone rang. Why give a stranger that much of your afternoon?