A security researcher discovered the databases, which belong to a US-based email and SMS marketing company called River City Media. The records include the names, IP addresses, zip codes and physical addresses associated with the email addresses. The cause of the data exposure appears to be an oversight. The leak could be one of the largest of all time, but it’s likely the databases contain duplicates. It’s unclear if other fraudsters or hackers may have already stumbled upon it. Some of records were updated as recently as January.”]
Source: https://www.cuinfosecurity.com/backup-error-exposes-137-billion-record-spamming-database-a-9755