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Evaluate phone number risk levels and vanity ratings with smart spam blocking recommendations.
When you receive an unknown call or need to filter out telemarketing numbers, this tool quickly determines the number's risk level (Levels 1-3) and vanity rating (Grades A-C) by analyzing complaint data from major telecom carriers and number characteristics. Blocking recommendations are automatically generated based on your custom sensitivity threshold: 0 indicates a safe number, while 1 and 2 represent moderate risk and high-risk numbers, respectively.
How is a number determined to be high-risk?
When a number has ≥3 complaint records and is recently active, the system automatically flags it as a Level 2 high-risk number.
What are the vanity number rating standards?
Grade A: Consecutive/symmetrical numbers (e.g., 18888888888)
Grade B: Repeating digits/sequential numbers (e.g., 16888888888)
Grade C: Standard random numbers
Currently supports only 11-digit mainland China phone numbers. Results are updated on a 7-day cycle. For high-risk scenarios, manual verification is recommended; do not rely solely on a single data source for decision-making.
Typical telemarketing number characteristics include: 170/171 prefixes, sudden spikes in complaint records, and high-frequency outbound calls in a short period. We recommend integrating this tool with carrier blacklist APIs to build a multi-layered defense system.
