There’s a free mobile app version of True People Search, as well.

If any paid site is going to openly show you where someone works, it’s probably Social Catfish.

While Instant Checkmate won’t tell you where someone is employed, it may provide you with info you need to help narrow things down.

If you know any of the associates, you can always ask them if they know where the person works.

If they work for a company with more than one location (like a bank or fast food company), you may need to contact nearby branches to find which specific location they’re at. If you can’t find them on LinkedIn, they may not have an account.

If their gig isn’t listed in their profile, scroll their timeline a bit. They may mention where they work in a status they’ve posted or have a photo of them at their job. If their profile is private, try friending them—even if your account is empty. A lot of people on Facebook accept any friend request. It helps to include a city if you don’t have any mutual friends. For example, instead of searching for “Jason Boggs” you might search for “Jason Boggs Boston” to narrow things down.

The remaining social media options are very unlikely to yield results, but it won’t hurt to check Twitter, Tumblr, and Snapchat.

For example, if you’re looking for someone named Samantha Sanders, you might search “Samantha Sanders‘ Chicago. ” If you had some additional clues, you might search “Samantha Sanders‘ Chicago banking bank branch. ” Try every iteration of the person’s name (if you can). For someone named Samantha Sanders, do a search for their maiden name, or use “Sam” instead of “Samantha. ” Putting quotation marks around specific terms will only fetch results that include those terms. This is helpful if they’re a chemical engineer, for example, because “chemical engineer” won’t search separately for “chemical” and “engineer. ”

This is a great option if you also want more information beyond the person’s job, like whether they’re dating someone or how they spend their free time.

Teachers, real estate agents, law enforcement, lawyers, and medical professionals are examples of industries that may work for this. For example, if you know a Louis Grossman who works in real estate, you could search something like “‘Louis Grossman’ realtor Illinois” to see if you can find where they specifically work.