Leaked Username Lookup

Verify Leaked Username

Free Leaked Username Lookup

Check any username to see if it has been leaked online.

Integrate the Leaked Data API or Upload a Bulk CSV List

Validating leaked usernames for registrations, payments, marketing lists, and overall user verification (such as AML/KYC) is an industry best practice to ensure your user data is accurate and up to date. Leaked username verification also has an added benefit of limiting abusive behavior such as fake duplicate accounts and abuse from credit card chargebacks.

Verifying leaked usernames can be performed with the IPQS leaked username validation API which includes example code to make integration a breeze. Bulk marketing lists can also be uploaded through the user dashboard in CSV format. Affordable pricing and enhanced lookup details provide better data and reputation insight than similar services.

Detect leaked usernames with one simple API lookup. Improve user data and lead quality with accurate username lookups that check thousands of lists containing millions of examples of leaked information.

How Does Leaked Username Validation Work?

Upon searching with the leaked username lookup tool above, IPQS will automatically lookup the username against the country's number one collection of leaked data lists. A quick syntax check is performed to ensure the username is properly formatted and then matched against our thousands of database lists. Once complete, the display will show if the username was clean or if it was found, the details of which table and when it was first seen will be shown in that area.

Using these services in real time to verify potentially leaked usernames is a great way to analyze user quality or perform lead scoring. This can be taken a step further for additional reputation checks with leaked email validation and leaked password validation, for complete user verification.

What Leaked Username Validation Lookup Data Is Available?

Using either the leaked username verification API or bulk list processing will return whether the username was found or not, if found, the name of the source list, and the date that username was first seen on our lists. This makes it easy to identify a leaked username that likely represent a fraudulent user with an compromised username.

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