Have I Been Pwned: Pwned websites
haveibeenpwned.com
Have I Been Pwned allows you to search across multiple data breaches to see if your email address or phone number has been compromised.

"In July 2019, the forum for webcomic XKCD suffered a data breach that impacted 562k subscribers. The breached phpBB forum leaked usernames, email and IP addresses and passwords stored in MD5 phpBB3 format. The data was provided to HIBP by white hat security researcher and data analyst Adam Davies.

Breach date: 1 July 2019 Date added to HIBP: 1 September 2019 Compromised accounts: 561,991 Compromised data: Email addresses, IP addresses, Passwords, Usernames"