Data breach
KnownCircleknowncircle.com
1 957 600 accounts exposed in a breach dated 2016-04-12.
Breached2016-04-12Added to HIBP2018-11-17 UTCUpdated by HIBP2018-11-17 UTCAccounts1 957 600Domainknowncircle.com
Verified
What happened in Have I Been Pwned’s words
In approximately April 2016, the "marketing automation for agents and professional service providers" company KnownCircle had a large volume of data obtained by an external party. The data belonging to the now defunct service appeared in JSON format and contained gigabytes of data related to the real estate and insurance sectors. The personal data in the breach appears to have primarily been used for marketing purposes, including logs of emails sent and tracking of gift cards. A small number of passwords for KnownCircle staff were also present and were stored as bcrypt hashes.
Exposed data as HIBP classifies it
- Email addresses
- Email messages
- Genders
- Names
- Passwords
- Phone numbers
- Physical addresses
How HIBP qualifies it
- HIBP verified that the data came from this service.
Source: Have I Been Pwned (CC BY 4.0)
Copied from HIBP 2026-11-05 03:50 UTC