Class C Ip Checker

Enter up to 40 Domains (Each Domain must be on separate line)



About Class C Ip Checker

? What is the Class C IP Checker Tool?

The Class C IP Checker on pcjow.com is a free SEO and networking tool that checks whether multiple domains or websites are hosted on the same Class C IP block. This is helpful for SEO link building, PBN analysis, and hosting diversity checks.

In networking, a Class C IP refers to the first three octets of an IP address (e.g., 192.168.1.X). Websites hosted on the same Class C IP may be using the same server or subnet, which could affect search engine evaluations of backlink networks.

⚙️ How Does It Work?

When you enter multiple domain names:

  • The tool resolves each domain to its IP address

  • It extracts the Class C portion (first three sets of numbers)

  • It then compares and lists:

    • IP addresses

    • Class C blocks

    • Matches (if multiple domains share the same Class C IP)

This lets you identify potential hosting overlaps or SEO link risks.

? Who Should Use It?

This tool is perfect for:

  • SEO professionals checking backlink diversity

  • Agencies or marketers auditing private blog networks (PBNs)

  • Webmasters comparing hosting setups

  • Security researchers investigating domain clusters

  • Anyone managing multiple websites and domains

? Step-by-Step Usage Guide

  1. Go to: pcjow.com/class-c-ip-checker

  2. Enter two or more domain names (one per line or comma-separated)

  3. Click the “Check Class C IP” button

  4. The tool will:

    • Convert domains to IP addresses

    • Show Class C blocks for each

    • Highlight any domains sharing the same Class C range

  5. Use the results to manage your SEO footprint or hosting structure

✅ Pros

  • ✔️ Free and easy to use

  • ✔️ Detects Class C overlaps quickly

  • ✔️ Useful for link building strategy and SEO audits

  • ✔️ No registration required

  • ✔️ Supports multiple domain inputs at once

⚠️ Limitations

  • ❌ Cannot analyze sites using Cloudflare or proxy IPs

  • ❌ Only checks Class C, not full hosting details

  • ❌ Doesn’t test IP reputation or server behavior

  • ❌ Cannot resolve domains that are down or expired