What is IP Reputation?
The Complete Guide

Table of Contents

• Definition
• How It Is Calculated
• Business Impact
• Code Example
• FAQs

Definition

IP Reputation is a score or classification assigned to an IP address that predicts the likelihood of it engaging in malicious activity.

Just like a credit score rates a person's financial trustworthiness, an IP reputation score rates an internet connection's behavior.

How It Is Calculated

Scoring engines analyze multiple factors in real-time:

• History: Has this IP sent spam or brute-force attacks recently?
• Type: Is it a residential, mobile, or datacenter IP?
• Velocity: Is it making thousands of requests per second?
• Association: Is it part of a known botnet?

Business Impact

Using IP reputation allows you to:

• Reduce CAPTCHAs: Only show challenges to low-reputation IPs.
• Stop Fraud: Block purchases from IPs with a history of chargebacks.
• Improve UX: Trusted users get a frictionless experience.

Code Example (Go)

package main

import (
    "fmt"
    "net/http"
    "encoding/json"
)

func main() {
    ip := "1.2.3.4"
    resp, _ := http.Get("https://api.ipasis.com/v1/lookup?ip=" + ip)
    
    var data map[string]interface{}
    json.NewDecoder(resp.Body).Decode(&data)
    
    riskScore := data["risk_score"].(float64)
    if riskScore > 80 {
        fmt.Println("High Risk IP - Block")
    } else {
        fmt.Println("Safe IP")
    }
}

FAQs