Evaluate phone number risk levels and vanity ratings with smart spam blocking recommendations.
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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.
