Understanding Proxy IP Reputation and Why It Affects Your Success Rate

You buy 100 proxy IPs. You test them. Half work, half are already blocked. What happened? The answer is IP reputation — and understanding it is the difference between wasting money and running successful operations. What Is IP Reputation? Every IP address on the internet has a reputation score maintained by various services and platforms. This score is based on: Historical behavior — What has this IP been used for in the past? IP type classification — Is it datacenter, residential, or mobile? Abuse reports — Has this IP been reported for spam, fraud, or abuse? Blacklist presence — Is this IP on any known blacklists? Network neighborhood — Are other IPs in the same subnet flagged? The IP Reputation Hierarchy Highest Trust │ ├── Mobile Carrier IPs (4G/5G) │ Shared by thousands of legitimate users │ Nearly impossible to blacklist │ ├── Residential ISP IPs │ Assigned to home users │ Generally trusted but individually blockable │ ├── Business ISP IPs │ Assigned to companies │ Moderate trust