You can check if a phone number is linked to an Instagram account by using the phone number and requesting an account verification code.
Another way to check if a phone number is linked to Instagram is to search for a phone number on Google to look for any linked social media accounts.
You can also find if a phone number is linked to Instagram by going to the “Search” section and enter the phone number.
If the person has linked their phone number and their profile settings, their account might appear here.
When you confirm your phone number or email on Instagram, your account may be recommended to users who have your contact information in their device's contact list.
You may also be recommended people and things that are relevant to you so we can offer you a better service.
Mobile numbers and email addresses are always private on your Instagram accounts.
You can also remove a confirmed mobile number or email address from your account at any time, as long as you still have at least one confirmed mobile number or email address on your account.
To find a phone number linked to Instagram through Instagram.
Open Instagram.
Tap your profile icon
Click the three lines in the top right corner.
Select Settings and privacy.
Scroll down and tap Add account.
Choose Log in to existing account.
Tap Forgot password.
Select Phone as the recovery method.
Enter the phone number.
Instagram will send a verification code to your phone.
Enter the code.
Instagram will display all accounts linked to that phone number.