Enter up to 40 Domains (Each Domain must be on separate line)
The Class C IP Checker by seochecker.tools helps you check whether multiple domains share the same Class C IP address — a critical factor in SEO, especially when analyzing backlink profiles and hosting diversity.
When several websites link to you from the same Class C IP range, it can signal to Google that those links may be part of a private blog network (PBN) or are not diverse enough, which could hurt your SEO performance.
This tool is ideal for SEOs, digital marketers, and hosting analysts who want to ensure link diversity and hosting integrity.
An IP address (like 192.168.1.1) consists of four blocks. The first three blocks (e.g., 192.168.1) make up the Class C range. Websites hosted on the same Class C IP range are likely on the same server or network.
Search engines prefer backlinks from diverse Class C IPs to ensure natural link building and discourage manipulation.
Analyze link diversity of referring domains
Detect PBN (Private Blog Network) footprints
Avoid link penalties from clustered backlinks
Perform advanced SEO audits
Check shared hosting risks or domain networks
Instantly checks Class C IP of any domain
Analyze multiple domains in one go
Fast and reliable IP lookup
100% free and mobile-friendly
No registration required
Helps identify network connections between websites
Q1. What is a Class C IP?
It refers to the first three octets of an IP address (e.g., 192.168.1). Websites with the same Class C IP may be hosted together.
Q2. Why does Class C matter for SEO?
Google evaluates link sources. If all your backlinks come from the same Class C IP range, they may appear spammy or manipulated.
Q3. Can this tool detect private blog networks?
Yes, it helps identify domains linked together via Class C IP, which is a common footprint of PBNs.
Q4. Is this tool safe to use for competitor analysis?
Absolutely. You can analyze any public domain without restrictions.
Q5. Can I input multiple domains?
Depending on our interface update, yes — bulk checking support is either included or planned in future releases.
Check backlink sources for SEO audit
Ensure Class C diversity before buying backlinks
Analyze competitor networks
Avoid link penalties from clustered hosting
Identify domains hosted on the same server
