Skip to content
    Moz logo Menu open Menu close
    • Products
      • Moz Pro
      • Moz Pro Home
      • Moz Local
      • Moz Local Home
      • STAT
      • Moz API
      • Moz API Home
      • Compare SEO Products
      • Moz Data
    • Free SEO Tools
      • Domain Analysis
      • Keyword Explorer
      • Link Explorer
      • Competitive Research
      • MozBar
      • More Free SEO Tools
    • Learn SEO
      • Beginner's Guide to SEO
      • SEO Learning Center
      • Moz Academy
      • MozCon
      • Webinars, Whitepapers, & Guides
    • Blog
    • Why Moz
      • Digital Marketers
      • Agency Solutions
      • Enterprise Solutions
      • Small Business Solutions
      • The Moz Story
      • New Releases
    • Log in
    • Log out
    • Products
      • Moz Pro

        Your all-in-one suite of SEO essentials.

      • Moz Local

        Raise your local SEO visibility with complete local SEO management.

      • STAT

        SERP tracking and analytics for enterprise SEO experts.

      • Moz API

        Power your SEO with our index of over 44 trillion links.

      • Compare SEO Products

        See which Moz SEO solution best meets your business needs.

      • Moz Data

        Power your SEO strategy & AI models with custom data solutions.

      Turn SEO data into actionable content briefs

      Turn SEO data into actionable content briefs

      Learn more
    • Free SEO Tools
      • Domain Analysis

        Get top competitive SEO metrics like DA, top pages and more.

      • Keyword Explorer

        Find traffic-driving keywords with our 1.25 billion+ keyword index.

      • Link Explorer

        Explore over 40 trillion links for powerful backlink data.

      • Competitive Research

        Uncover valuable insights on your organic search competitors.

      • MozBar

        See top SEO metrics for free as you browse the web.

      • More Free SEO Tools

        Explore all the free SEO tools Moz has to offer.

      Let your business shine with Listings AI

      Let your business shine with Listings AI

      Get found
    • Learn SEO
      • Beginner's Guide to SEO

        The #1 most popular introduction to SEO, trusted by millions.

      • SEO Learning Center

        Broaden your knowledge with SEO resources for all skill levels.

      • On-Demand Webinars

        Learn modern SEO best practices from industry experts.

      • How-To Guides

        Step-by-step guides to search success from the authority on SEO.

      • Moz Academy

        Upskill and get certified with on-demand courses & certifications.

      • MozCon

        Save on Early Bird tickets and join us in London or New York City

      Access 20 years of data with flexible pricing
      Moz API

      Access 20 years of data with flexible pricing

      Find your plan
    • Blog
    • Why Moz
      • Digital Marketers

        Simplify SEO tasks to save time and grow your traffic.

      • Small Business Solutions

        Uncover insights to make smarter marketing decisions in less time.

      • Agency Solutions

        Earn & keep valuable clients with unparalleled data & insights.

      • Enterprise Solutions

        Gain a competitive edge in the ever-changing world of search.

      • The Moz Story

        Moz was the first & remains the most trusted SEO company.

      • New Releases

        Get the scoop on the latest and greatest from Moz.

      Surface actionable competitive intel
      New Feature

      Surface actionable competitive intel

      Learn More
    • Log in
      • Moz Pro
      • Moz Local
      • Moz Local Dashboard
      • Moz API
      • Moz API Dashboard
      • Moz Academy
    • Avatar
      • Moz Home
      • Notifications
      • Account & Billing
      • Manage Users
      • Community Profile
      • My Q&A
      • My Videos
      • Log Out

    The Moz Q&A Forum

    • Forum
    • Questions
    • Users
    • Ask the Community

    Welcome to the Q&A Forum

    Browse the forum for helpful insights and fresh discussions about all things SEO.

    1. Home
    2. SEO Tactics
    3. Technical SEO
    4. Websites on same c class IP address

    Moz Q&A is closed.

    After more than 13 years, and tens of thousands of questions, Moz Q&A closed on 12th December 2024. Whilst we’re not completely removing the content - many posts will still be possible to view - we have locked both new posts and new replies. More details here.

    Websites on same c class IP address

    Technical SEO
    3
    5
    5970
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as question
    Log in to reply
    This topic has been deleted. Only users with question management privileges can see it.
    • seoug_2005
      seoug_2005 last edited by

      If two websites are on the same  c class IP address, what does it mean ?

      Does two websites belong to the same company ?

      1 Reply Last reply Reply Quote 0
      • KeriMorgret
        KeriMorgret last edited by

        But if you have 20 sites linking to you, and they're all from the same Class C IP address, and those are pretty much your ONLY links, that looks a bit fishy to the search engines. It's a signal to the search engines that "hey, this person can only get links from sites that have a high probability of the same person being in control of all of the sites".

        That's why you'll see people talk about linkbuilding and wanting to do so from different Class C IP addresses.

        1 Reply Last reply Reply Quote 4
        • Olaf
          Olaf @seoug_2005 last edited by

          Not necessarily. f you see different C blocks, you are usually talking about two different webhosts. So there is a chance that different sites from one owner are hosted in one C-block.

          Even an IP-address is not always used for one company. You can have your own IP-address which leads to your website. But providers can also share an IP-address for different domains/ websites for different companies.

          To find if website belong tot the same owner you need to check te registars database or tools like allwhois.com.

          1 Reply Last reply Reply Quote 0
          • seoug_2005
            seoug_2005 @Olaf last edited by

            Thanks Olaf.

            So, does it mean that sites hosted on same C class IP belong to one owner ?

            Olaf 1 Reply Last reply Reply Quote 0
            • Olaf
              Olaf last edited by

              A "C" Block address is based on your IP address.

              For example 190.245.111.001 is a standard IP address. The c-blocks in this case are: AAA.BBB.CCC.001-254

              So these are within the same C-class:

              190.245.111.001
              190.245.111.230

              And these are different C-Class IP's:

              190.245.111.001
              190.245.222.001

              Google may assume that sites hosted in differnet C-blocks are more likely to be from different people.

              seoug_2005 1 Reply Last reply Reply Quote 5
              • 1 / 1
              • First post
                Last post

              Got a burning SEO question?

              Subscribe to Moz Pro to gain full access to Q&A, answer questions, and ask your own.


              Start my free trial


              Browse Questions

              Explore more categories

              • Moz Tools

                Chat with the community about the Moz tools.

              • SEO Tactics

                Discuss the SEO process with fellow marketers

              • Community

                Discuss industry events, jobs, and news!

              • Digital Marketing

                Chat about tactics outside of SEO

              • Research & Trends

                Dive into research and trends in the search industry.

              • Support

                Connect on product support and feature requests.

              • See all categories

              Related Questions

              • Dan_Tala

                My website is constantly decreasing

                loss of ranking

                For few weeks ago my website is constantly decreasing in search position. I lost keywords and is gooooing down.
                Although it is well rated on several on page and off page seo verification software that I have tried.
                I checked Google search console and Analytics and found no major problems. However… from one day to another it keeps going down.
                I also checked what the main competitors are doing and they are not doing well, at all.
                The main competitor actually has a creepy website. Totally devoid of onpage or offpage SEO but with an enormous number of backlinks. And of a very bad quality, which should disqualify it, still…
                Few weeks ago I changed something.
                In the pages I had H1, 4xH2, no H3 and an H4 without content.
                An unnatural H tag structure.
                Now I have H1, H2, H3, 3xH4, with the coherent information.
                Theoretically, Google should have been “happy” or I’m missing something. I use a SAAS platform.
                I just found out that they made changes to the keywords (tags).
                I am selling toner cartridges for printers.
                So…
                The tags are printer models and generate a url in which they have the products.
                Ex. https://www.sertit.ro/cartus-imprimanta-cilindru-color-hp-laserjet-pro-m-177fw goes to the products for that printer model.
                The question is… should I make tag canonical?
                Is it possible for products to loose so much in Google search?

                Technical SEO | | Dan_Tala
                0
              • vaskrupp

                Website ranking declined after connecting to CDN

                Hi! We are trying to rank https://windowmart.ca for various local search terms. Our head office is in Edmonton where we try to rank https://windowmart.ca/edmonton-windows-doors/ for such terms as "windows Edmonton", "replacement windows Edmonton", "windows and doors Edmonton" as well as others. The website was the leader in its niche for around 2 years. Then we've got some server related issues, moved to a new server and connected CDN Nitropack that really improved our google speed test results. Recently we noticed that our rankings started to drop. Do you know if Nitropack can negatively effect local SEO rankings? Thank you!

                Technical SEO | | vaskrupp
                0
              • ViviCa1

                Migrating micro site into existing website

                My company is planning to migrate an existing (ecommerce) micro site - which sits on its own domain - into their main ecommerce site. This means that the content will be moved from www.microdomain.co.uk to www.maindomain.com/category. Some products already exist on the main domain. The micro site is fairly small with just over 400 pages - I am planning to map each URL to the new URL (exact corresponding page) and create 301 redirects for each. Where any additional content does not exist yet on the existing main domain, we will create it and 301 redirect to it. The micro site currently ranks fairly well for some keywords - being such a specialised micro site, (some of) the keywords also form part of the domain name, however, they won't on the main page although they may form part of the URL (category). As an example (using a made up URL), our micro site www.bread-sticks.co.uk ranks on page 1 for the keyword bread sticks - we don't just sell bread sticks on www.bread-sticks.co.uk but also rolls and bread though, bread sticks is one category of very closely related categories. Say our main domain is www.supermarket.co.uk (selling a wide range of food / drink products. The micro site will be moving to www.supermarket.co.uk/baked-products/ - which is a category. Within that category, there are sub categories, i.e. bread sticks, rolls and bread which will sit under www.supermarket.co.uk/bread-sticks/ etc. What would be the best way for ensuring that our main domain would take over the rankings from our micro site, given that it will be sitting on our main domain as a category (one of many)? Can we expect www.supermarket.co.uk/baked-products/ or www.supermarket.co.uk/bread-sticks/ to replace www.bread-sticks.co.uk in the rankings simply by 301 redirecting? Thanks for your help!

                Technical SEO | | ViviCa1
                0
              • ngupta1

                How to display the full structure of website on Google serps

                I have been searching around but unable to gather information as to how we can control or list  top pages of a website on Google's first page , i.e. if we type seomoz in google , we can see the main listing with 6 subdomain listings , which link to Blog , Seo tool , Beginner Seo guide , Learn Seo , Pricing & Plans and login My question is can we control these listings i.e. what to display and what not , and if yes how can we make this type of visibility on first page , by using html or xml sitemaps or theirs something mostly websites are missing. Cause this type of data is coming up for very less websites and mostly websites are with single urls. c43Ki.jpg

                Technical SEO | | ngupta1
                0
              • ufmedia

                How much will changing IP addresses impact SEO?

                So my company is upgrading its Internet bandwidth.  However, apparently the vendor has said that part of the upgrade will involve changing our IP address.  I've found two links that indicate some care needs to be taken to make sure our SEO isn't harmed: http://followmattcutts.com/2011/07/21/protect-your-seo-when-changing-ip-address-and-server/ http://www.v7n.com/forums/google-forum/275513-changing-ip-affect-seo.html Assuming we don't use an IP address that has been blacklisted by Google for spamming or other black hat tactics, how problematic is it? (Note: The site hasn't really been aggressively optimized yet - I started with the company less than two weeks ago, and just barely got FTP and CMS access yesterday - so honestly I'm not too worried about really messing up the site's optimization, since there isn't a lot to really break.)

                Technical SEO | | ufmedia
                0
              • jmccommas

                Advice on Linking to an Adult Related Website

                I have a question regarding whether or not Google would penalize my main website for linking to a website that has adult content. The site I am linking to is not a porn site, rather it is a site that sells web site templates for adult related stores selling sexy toys, videos, etc. For example my site that is linking to the adult related website is here: http://www.websitetemplatedesign.com/ and the link to the site is in the footer at the bottom left which is an icon. And it links to http://www.adultsextemplates.com/ Im just looking for advice as to whether or not this could be a penalty or not. I did suffer major SERP loss in the last month and Im trying to find what I am doing that may have caused this. Any advice would be appreciated.

                Technical SEO | | jmccommas
                0
              • slangdon

                Google is Showing Website as "Untitled"

                My freelance designer made some changes to my website and all of a sudden my homepage was showing the title I have in Dmoz. We thought maybe the NOODP tag was not correct, so we edited that a little and now the site is showing as "Untitled". The website is http://www.chemistrystore.com/. Of course he didn't save an old copy that we can revert to. That is a practice that will end. I have no idea why the title and description that we have set for the homepage is not showing in google when it previously was. Another weird thing that I noticed is that when I do ( site:chemistrystore.com ) in Google I get the https version of the site showing with the correct title and description. When I do ( site:www.chemistrystore.com ) in Google I don't have the hompage showing up from what I can tell, but there are 4,000+ pages to the site. My guess is that if it is showing up, it is showing up as "Untitled". My question is.... How can we get Google to start displaying the proper title and description again?

                Technical SEO | | slangdon
                0
              • mosaicpro

                What is the best website structure for SEO?

                I've been on SEOmoz for about 1 month now and everyone says that depending on the type of business you should build up your website structure for SEO as 1st step. I have a new client click here   ( www version doesn't work)... some bugs we are fixing it now. We are almost finished with the design & layout. 2nd question have been running though my head. 1. What would the best url category for the shop be    /products/     - current url cat ex:   /products/door-handles.html 2. What would you use for the main menu as section for getting the most out of SEO. Personally i am thinking of making 2-3 main categories on the left a section where i can add content to it (3-4 paragraphs... images maybe a video).So the main page focuses on the domain name more and the rest of the sections would focus on specific keywords, this why I avoid cannibalization. Main keyword target is "door handles" Any suggestions would be appreciated.

                Technical SEO | | mosaicpro
                0

              Get started with Moz Pro!

              Unlock the power of advanced SEO tools and data-driven insights.

              Start my free trial
              Products
              • Moz Pro
              • Moz Local
              • Moz API
              • Moz Data
              • STAT
              • Product Updates
              Moz Solutions
              • SMB Solutions
              • Agency Solutions
              • Enterprise Solutions
              • Digital Marketers
              Free SEO Tools
              • Domain Authority Checker
              • Link Explorer
              • Keyword Explorer
              • Competitive Research
              • Brand Authority Checker
              • Local Citation Checker
              • MozBar Extension
              • MozCast
              Resources
              • Blog
              • SEO Learning Center
              • Help Hub
              • Beginner's Guide to SEO
              • How-to Guides
              • Moz Academy
              • API Docs
              About Moz
              • About
              • Team
              • Careers
              • Contact
              Why Moz
              • Case Studies
              • Testimonials
              Get Involved
              • Become an Affiliate
              • MozCon
              • Webinars
              • Practical Marketer Series
              • MozPod
              Connect with us

              Contact the Help team

              Join our newsletter
              Moz logo
              © 2021 - 2025 SEOMoz, Inc., a Ziff Davis company. All rights reserved. Moz is a registered trademark of SEOMoz, Inc.
              • Accessibility
              • Terms of Use
              • Privacy

              Looks like your connection to Moz was lost, please wait while we try to reconnect.