Have I Been Pwned suffered from a data breach incident that exposed personal data including 33M NetProspex records.
They sent mistakenly sent a very large file that contained 33,698,126 records and a 52.2GB CSV file.
Source: https://www.troyhunt.com/weve-lost-control-of-our-personal-data-including-33m-netprospex-records/
"id": "HAV234628722",
"linkid": "haveibeenpwned",
"type": "Breach",
"date": "03/2017",
"severity": "85",
"impact": "4",
"explanation": "Attack with significant impact with customers data leaks"