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.

      Let your reputation grow with Reviews AI
      Moz Local

      Let your reputation grow with Reviews AI

      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.

      NEW Keyword Suggestions by Topic
      Moz Pro

      NEW Keyword Suggestions by Topic

      Learn more
    • 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

      Unlock flexible pricing & new endpoints
      Moz API

      Unlock flexible pricing & new endpoints

      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. Link Building
    4. What impact does multiple links from the same c-block have on SEO?

    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.

    What impact does multiple links from the same c-block have on SEO?

    Link Building
    3
    4
    1297
    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.
    • LawMarketingYLF
      LawMarketingYLF last edited by

      Recently there's been a move made in my company to only allow backlinks from websites on different c-block IP addresses. The most links we have from one c-block is 15. There is a wide variety of other IP addresses linking to our site as well. My question is - do we need to be so restrictive with using websites from the same c-block as long as the neighbourhood is good and we're not linking sites with full identical IPs (matching d-block as well)?

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

        Thanks James, I just wanted to clarify as it was not clear you were making that distinction in your initial answer.

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

          We're not even talking identical IPs in this situation, we're talking matching c-block but unique IP. Would your answer still be the same?

          1 Reply Last reply Reply Quote 0
          • Rajesh.Prajapati
            Rajesh.Prajapati last edited by

            If you take links from c class ip sites which are handled from the same company/owner, then it is harmful. if owner/company is different, then no problem.

            1 Reply Last reply Reply Quote 1
            • 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

            • whiteonlySEO

              Can affiliate links benefit or hurt my seo?

              I have just signed up with a company to do affiliate marketing for my site. I am now in the process of  reaching out to publishers and seeing who will publish my link on their site. Is there any benefit in terms of seo for having these links, and can there be any potential downside to these links as well?

              Link Building | | whiteonlySEO
              0
            • NCOREGSEO

              Backlinks vs External Links vs Referral Links vs Outbound links

              Hello all, I was just wondering if you could explain the difference between all the links above? I'm confused as they all seem to be the same or similar and I would just like to clearly know what distinguishes them from eachother. Thanks for your help, Jayne

              Link Building | | NCOREGSEO
              0
            • bloomnation

              Mat Release SEO Impact

              How do Mat Releases affect SEO? Does google recognize that your are syndicating duplicate content even if the content is being syndicated across top media outlets? Do these back links still carry any authority or can we even be penalized for the duplicate content? I came across mat releases here: http://matrelease.com/ An example of article syndication outlets: Guaranteed Placement on 800+ Media Sites. Generate guaranteed article placement on more than 800 respected online media outlets. Our digital distribution network includes: The LA Times; The Milwaukee Journal Sentinel (JS Online); Las Vegas Review Journal; Hearst media sites for the San Francisco Chronicle, Houston Chronicle and Connecticut Post and others; local TV news affiliate sites from ABC, CBS, FOX and others; and hundreds more trusted sites.

              Link Building | | bloomnation
              0
            • OneMedical

              A link with "return false"- OSE sees as a No Followed Link

              Hello, I couldn't find a clear answer to the impact on SEO for a link written in this way: [" class="expert_info" onclick="window.open(this.href);return false;">](w</span>ww.yourwebsite.com<span style=) [Does the "return false" act as a "no follow"? I came across this in our link data in Open Site Explorer which lists these links all as "no follows." However, an engineer I spoke to said that it shouldn't impact search engine behavior. Any ideas? Thank you in advance! -Sarah K.](w</span>ww.yourwebsite.com<span style=)

              Link Building | | OneMedical
              0
            • theLotter

              Does blocking domains help remove bad links?

              I have affiliate websites that are harming for one of 2 reasons: 1. They are on adult websites (and I don't want to be in a bad neighborhood) or 2. They are using a Frameset (so their content appears identical to mine and I am getting "credit" for all their junk links) I cannot get these websites to remove our links so I have blocked their IPs on our production firewall. Is this an effective method or should I do something else with these links?

              Link Building | | theLotter
              0
            • aaran

              How many links per week is too fast in link building?

              For a new website/blog how many links per week looks suspicious or hurt the rankings?

              Link Building | | aaran
              1
            • Vsky

              Does linking to a subdomain give link juice to the main domain?

              I have a few domains that I'm going to use for link building, will the link juice from the sub domains transfer to the main domain?

              Link Building | | Vsky
              0
            • pricefutures

              Link Frequency

              I understand that good link building is all about the quality of the link / the anchor text attached to it. But, what about frequency? Should I build until I can't build anymore? or create a plan to submit links to a certain # of sites per week/month?

              Link Building | | pricefutures
              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.