You get a call from a phone number you don’t recognize. There’s a good chance it’s just a scammer, but it could also be a legitimate business or a person you know. Rather than answering the phone or calling the number back, there are a few quick ways you can identify just who it was who tried to call you.

How many times have you looked at your phone or your significant other’s phone and said: “Whose number is this?” And how many times have you wondered where to go to find out who is calling you from an unknown number?

It happens all the time, both with calls and text messages. Is it an unsolicited call? A friend with a new number? Spam? A telemarketer? An ex? Someone you don’t want to talk to? A coworker? Is it someone your partner is cheating with? The truth is you really never know! If this is the case, a spy app might serve your needs better. A spy app gets installed to your phone and is able to retrieve information from another cell phone via a remote connection. With a capable spy app you would not need to have the other phone in your possession. The app collects text messages, call recordings, GPS location, photos, Facebook messages and a lot more.

Before answering or calling back or asking your partner to see who it is, be safe. Try a reverse cell phone number lookup by using a reliable search service like Kiwi Searches. But how do you run a reverse phone number search? It’s easy, actually.

Did you receive a call from a number you don't recognize? Since cell phone numbers are generally not listed in public databases, finding the owners of such numbers can be tricky—especially since spam callers can spoof their phone numbers to implicate others! If you're being harassed over the phone and feel unsafe, call your local authorities. But if you're being pestered by annoying spam calls, or just want to know who's been calling your line, this wikiHow will teach you different ways to locate the owner of a phone number.

Websites like whitepages can provide some additional information about a phone number. They’ll be able to associate a phone number with a person’s name and address if that information is available in the phone book—which it won’t be, for most phone numbers.

However, they’ll also be able to show you the geographical location where the phone number is registered, whether it’s a landline or a cell phone, and the phone company associated with the phone number. This information can give you some idea of who may be using a phone number.

This type of information is freely available on many different websites. Websites like these often ask for additional payment to try to find more information about a phone number—even the White Pages website does this—but we haven’t used these services and can’t vouch for them. We’d recommend sticking to the freely available information.

If you still can’t identify who tried to call you, you may want to try calling them back or just forget about it. They’ll probably call you back if it’s important.