Contractor Phone and Website Data Quality Checklist

Presence is only the first measure

Count populated values against a disclosed denominator, then test syntax, duplication, freshness, and attribution.

Phone checks

• Normalize formatting without inventing missing information.
• Flag malformed, shared, toll-free, and duplicated numbers.
• Never equate a public business number with consent to call or text.

Website checks

• Normalize hostname and redirects.
• Separate official domains from directories and social profiles.
• Treat failures as observations, not proof a business closed.

Pre-purchase evidence

Look for exact scope, field-presence counts, verification dates, a masked preview, and clear correction terms. TradeDataHub exposes aggregates and masked samples without revealing paid rows.