16.6K accounts from Troy Hunt's Mailchimp List (troyhunt.com) were exposed in this breach. Besides email addresses, it included geographic locations, iP addresses and latitude and longitude pairs.
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Email addressesGeographic locationsIP addressesLatitude and longitude pairs
In March 2025, a phishing attack successfully gained access to Troy Hunt's Mailchimp account and automatically exported a list of people who had subscribed to the newsletter for his personal blog. The exported list contained 16k email addresses and other data automatically collected by Mailchimp including IP address and a derived latitude, longitude and time zone.
Source: Have I Been Pwned (CC BY 4.0)