Sources

Numbering datasets

• NANPA — NPA Database (CSV)
• NANPA — Central Office Code Assignment Records
• NANPA — NPA Rate Center Report (All States)
• NANPA — NPA Reports & Exhaust Projections

Consumer-protection documentation

• CFPB — Fraud and scams
• CFPB — How to tell the difference between a legitimate debt collector and scammers
• FCC — 'One Ring' Phone Scam
• FCC — 900 Number Pay-Per-Call Services
• FCC — 988 Suicide & Crisis Lifeline: 10-digit dialing
• FCC — Auto Warranty Scam Robocalls
• FCC — Call authentication (STIR/SHAKEN)
• FCC — Caller ID Spoofing
• FCC — Porting: Keeping Your Phone Number When You Change Providers
• FCC — Stop Unwanted Robocalls and Texts
• FCC — Understanding area code overlays
• FCC — Voice over Internet Protocol (VoIP)
• FCC — What Is a Toll-Free Number and How Does it Work?
• Federal Student Aid — Avoiding student aid scams
• FTC — Before Giving to a Charity
• FTC — Fake Prize, Sweepstakes, and Lottery Scams
• FTC — Family emergency scams
• FTC — How To Avoid Imposter Scams
• FTC — How To Block Unwanted Calls
• FTC — How to recognize and report spam text messages
• FTC — How To Spot, Avoid, and Report Tech Support Scams
• FTC — National Do Not Call Registry
• FTC — ReportFraud
• IRS — How to know it's really the IRS
• IRS — Tax Exempt Organization Search
• IRS — Tax scams / consumer alerts
• Medicare — Reporting fraud
• NANPA
• NANPA — About the NANP
• NANPA — CO Code Assignment Records
• NANPA — CO Code Reports
• NANPA — NPA and NANP Exhaust Projections
• NANPA — NPA Rate Center Reports
• NANPA — Reports
• NANPA — Thousands-Block Reports
• SSA — Protect Yourself from Scams
• TIGTA — Report fraud hotline
• U.S. Courts — Juror scams
• U.S. Postal Inspection Service — Scams
• USCIS — Avoid scams

Retrieval dates and processing rules are described in How we verify data.