If you have tried but cannot find people on Instagram, don’t worry there are some third-party apps that will help you to find someone on Instagram by phone number.
1. Peoplelooker: It is a very easy website to use, you just need to mention the name and the phone number of the person and click on search.
2. BeenVerified: Another website is BeenVerified. This is also easy to use website, it will ask for some information about the person to search for them. Enter their name and some more details and click on search.