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WHOIS History

The WHOIS History panel shows historical WHOIS records for a domain, allowing you to track registration changes over time. Compare records side-by-side or view inline differences to understand how domain ownership and configuration have evolved.

What's included

The WHOIS History panel displays:

  • Current WHOIS record: The most recent WHOIS data
  • Historical records: Previous WHOIS records with timestamps
  • Timeline: Vertical timeline showing dates of historical records
  • Comparison tools: Side-by-side, inline, and raw views

View WHOIS records

By default, the panel shows the current WHOIS record. A vertical timeline on the left displays earlier dates for which DomainTools has historical WHOIS records.

Select a historical record

  1. Locate the timeline on the left side of the panel.
  2. Select a date to view that historical record.
  3. The panel displays the WHOIS record from that date.

Compare records

View changes between WHOIS records using three comparison methods:

Side by side

Displays two records in adjacent columns with differing rows highlighted:

  1. Select a historical date from the timeline.
  2. Choose Side by Side view.
  3. Differing fields appear highlighted.
  4. Scroll to compare records.

Inline

Shows differences within a single view with highlighting:

  1. Select a historical date from the timeline.
  2. Choose Inline view.
  3. Changed values appear highlighted inline.
  4. More compact than side-by-side view.

Raw

Displays complete raw WHOIS text for both records:

  1. Select a historical date from the timeline.
  2. Choose Raw view.
  3. Both records appear in full text format.
  4. Useful for examining complete record details.

Pivot from WHOIS History

The Operations Menu in WHOIS History provides unique email addresses for pivoting:

  1. Right-click an email address in the WHOIS record.
  2. The Operations Menu displays all unique emails from the record.
  3. Select a pivot operation:
  4. New Search: Search for domains with this email
  5. Narrow Search: Add as filter to current search
  6. Expand Search: Include in current results

Historical matches

When using historical search, domains may appear in results even if they don't currently match your query. To see when a domain matched:

  1. Navigate to the domain's WHOIS History.
  2. Select See Historical Matches.
  3. The panel displays the historical record(s) where the domain matched your search term.

This helps you understand:

  • When the domain had the matching value
  • How long the value persisted
  • What other changes occurred at the same time

Coverage

WHOIS History provides:

  • 20+ years of records: Extensive historical coverage
  • Multiple records per domain: Captures significant changes
  • Complete WHOIS text: Full record details preserved

For differential change tracking across all fields, see Domain History.

Use cases

Track ownership changes

Monitor domain ownership over time:

  • Registrant name changes
  • Registrant organization changes
  • Contact email changes
  • Registrar transfers

Investigate suspicious activity

Identify patterns that may indicate malicious use:

  • Rapid ownership changes
  • Privacy protection added/removed
  • Contact information patterns
  • Registration status changes

Verify legitimacy

Confirm domain authenticity:

  • Consistent ownership history
  • Stable contact information
  • Appropriate registrar
  • Expected registration patterns

Best practices

Efficient analysis

  1. Start with current record: Understand present state.
  2. Scan timeline: Identify periods of change.
  3. Compare key dates: Focus on significant changes.
  4. Use appropriate view: Choose comparison method for your needs.

Investigation workflow

  1. Review Domain Profile: Get overview.
  2. Open WHOIS History: Examine registration history.
  3. Compare records: Identify changes.
  4. Pivot on values: Investigate related domains.
  5. Document findings: Note significant changes.

What to look for

Legitimate patterns:

  • Stable ownership over time
  • Consistent contact information
  • Appropriate registrar
  • Gradual, planned changes

Suspicious patterns:

  • Frequent ownership changes
  • Privacy protection patterns
  • Inconsistent contact information
  • Unusual registration status changes

See also