Reverse IP Lookup API: Find All Domains on Any IP Address

What Is Reverse IP Lookup?

Reverse IP lookup (also called reverse DNS lookup or IP to domain lookup) finds all domain names hosted on a specific IP address. While a regular DNS lookup resolves a domain to an IP address, reverse IP lookup does the opposite: it finds all domains pointing to a given IP.

This is particularly useful because many websites share the same IP address through shared hosting, CDN services, or virtual private servers. Reverse IP lookup reveals these relationships.

Common Use Cases

How the Reverse IP API Works

curl -X GET "https://api.ops.tools/v1/reverse-ip?ip=93.184.216.34" \
  -H "Authorization: Bearer YOUR_API_KEY"

Response Data Fields

Code Examples

Python

import requests

apiUrl = "https://api.ops.tools/v1/reverse-ip"
headers = {"Authorization": "Bearer YOUR_API_KEY"}

response = requests.get(apiUrl, headers=headers, params={
    "ip": "93.184.216.34"
})
data = response.json()

print(f"IP: {data['ipAddress']}")
print(f"Domains found: {data['domainCount']}")
for domain in data["domains"]:
    print(f"  - {domain}")

Node.js

const response = await fetch(
  "https://api.ops.tools/v1/reverse-ip?ip=93.184.216.34",
  { headers: { "Authorization": "Bearer YOUR_API_KEY" } }
);
const data = await response.json();

console.log(`Found ${data.domainCount} domains on ${data.ipAddress}`);
data.domains.forEach(d => console.log(`  - ${d}`));

Best Practices for Reverse IP Lookups

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Frequently Asked Questions