Home / Data Breaches / Data & Leads
Verified breach record

Data & Leads Data Breach

Understand what this public breach record reports and choose next steps based on the information involved.

Breach date: November 14, 201844,320,330 affected accounts in the record
01

What happened?

In November 2018, security researcher Bob Diachenko identified an unprotected database believed to be hosted by a data aggregator . Upon further investigation, the data was linked to marketing company Data & Leads . The exposed Elasticsearch instance contained over 44M unique email addresses along with names, IP and physical addresses, phone numbers and employment information. No response was received from Data & Leads when contacted by Bob and their site subsequently went offline.

02

When did it happen?

The breach date in the public record is November 14, 2018. The record was added to the catalogue on November 28, 2018 and last updated there on November 28, 2018.

03

What information was reported as exposed?

  • Email addresses
  • Employers
  • IP addresses
  • Job titles
  • Names
  • Phone numbers
  • Physical addresses

These are incident-level categories. The record does not prove that every category was exposed for every affected person.

04

Who may be affected?

This record may be relevant to people who had an account or other relationship with Data & Leads or used datanleads.com around November 14, 2018. A catalogue entry does not establish that every customer was affected or that every listed data category applied to each person. Compare the record with an official notice addressed to you.

05

What should you do?

Verify whether the notice applies to you

Compare the organization, dates, and information categories with any notice you received. Use contact details you independently confirm.

Protect identity information

Review your credit reports and consider a free credit freeze if identity information could support new-account fraud.

Expect targeted phishing

Treat unexpected breach follow-ups with caution. Do not use links or phone numbers in a suspicious message; contact the organization directly.

Choose actions that match the information involved. If you find signs that someone is using your identity, the Federal Trade Commission provides a personal recovery plan at IdentityTheft.gov.

Sources and review information

Page reviewed September 14, 2026 by the Data Breach Help Editorial Team. Catalogue details reflect the provider record and may change.