Cell phone lookup services are available in two forms: a) find a number by searching for some other information you know about the caller, or b) look up someone’s number to see who owns it, called a reverse number search. Below is a comprehensive look at the best ways to use the internet to find phone number information. Most of these websites let you search by whatever information you already know. For example, you can find who owns the phone number (if you know the number) or which numbers belong to the person (if all you know is their name, email, username, or address). Some of these sites can even be used to find relatives and neighbors, meaning you could ultimately find someone’s brother’s phone number, for example, if all you know as a starting point is his sister’s name. One great (and free) example is TruePeopleSearch. For a fee, you can get lots of other personal details with BeenVerified or TruthFinder. Some people might have their social media profile set to private or might require you to connect with them on the service before you can view personal details like their phone number. However, others are wide open, and their phone number and other details might be entirely public. Depending on the platform, you might be able to search for a number using the person’s name and find who owns a phone number if you don’t know their name, all at no charge. If the number is posted on a blog, website, public job profile, people search engine that’s not listed above, etc., it will show up here. From there, you can do some more digging on that specific site to learn whose number it is and maybe even find their email and other contact information like a physical address. Using a search engine to research phone numbers works for not only cell numbers, but also landlines and toll-free numbers. For example, you can find an 800 number by searching “800 number” , or look up a company’s number with a search such as “contact us” XYZ (for XYZ’s support number). While most number lookup services focus on landlines, these have been confirmed to work when you’re looking up a name associated with the number, or for doing the opposite (locating a number from the person’s name):

Spy Dialer: See the owner’s name and where the area code is from. You can also hear the person’s voicemail message. NumLookup: View the person’s name and which carrier the number currently belongs to. It can also make calls and send texts to the number, and might even link to their social media accounts and list other details like their age, address, household members, etc. USPhonebook: Simple website that lets you find a number by name and find a name by a cell number search. It also lists possible relatives. InfoTracer: Not free, but queries over half a billion mobile numbers to match a name with the cell phone number. It also includes lots of other personal details after you pay.

Instant Username Search is a neat free service that identifies where a particular username has been registered. Search for a username, and use the links that say Taken to visit each site, which will hopefully ultimately lead you to the person’s phone number! Some examples of the dozens of sites it supports includes Instagram, YouTube, Medium, Patreon, Facebook, and Reddit.