Search Engine Watch
SEO News

Go Back   Search Engine Watch Forums > Search Engine Marketing Strategies > Search Engine Optimization
FAQ Members List Calendar Forum Search Today's Posts Mark Forums Read

Reply
 
Thread Tools
Old 11-24-2010   #41
AussieWebmaster
Forums Editor, SearchEngineWatch
 
AussieWebmaster's Avatar
 
Join Date: Jun 2004
Location: NYC
Posts: 8,153
AussieWebmaster has a brilliant futureAussieWebmaster has a brilliant futureAussieWebmaster has a brilliant futureAussieWebmaster has a brilliant futureAussieWebmaster has a brilliant futureAussieWebmaster has a brilliant futureAussieWebmaster has a brilliant futureAussieWebmaster has a brilliant futureAussieWebmaster has a brilliant futureAussieWebmaster has a brilliant futureAussieWebmaster has a brilliant future
Re: What Are Class C Blocks Of IPs?

very thorough response - welcome to the forum
__________________
Online marketing assistance - we play in traffic.
AussieWebmaster is offline   Reply With Quote
Old 02-04-2011   #42
staceymattew
Member
 
Join Date: Jan 2011
Location: Nashua, NH
Posts: 11
staceymattew is on a distinguished road
Re: What Are Class C Blocks Of IPs?

Build more C-Class IP quality free backlinks for the website it will be more useful for ranking better in the search engine.
staceymattew is offline   Reply With Quote
Old 05-03-2011   #43
bmcNyc
 
Posts: n/a
Re: What Are Class C Blocks Of IPs?

SEOmoz just explained this on their Whiteboard Friday dated 4/24/11 and titled: Which Link Metrics Should I Use? Part 1 of 2 - Whiteboard Friday

I'd post the link, but they'd probably strip it off.
  Reply With Quote
Old 05-01-2012   #44
devv0304
Member
 
Join Date: Jan 2012
Posts: 5
devv0304 is on a distinguished road
Re: What Are Class C Blocks Of IPs?

Whatís a C Block IP address?

You might get some conflicting results if you search for information on C Block IP because it often is confused with C Class IP addresses. For our purposes, the IP address is split into lettered sections (or blocks).

AAA.BBB.CCC.DDD

64.62.209.175 is in the same C Block as 64.62.209.10

The C Block is your neighborhood and those in the same C Block are your neighbors.

C Class IP addresses is a reference to the assignment of IP addresses. Iím not going to explain it further here because it just confuses the issue at hand. (If interested, hereís some basic information on IP Classes.)

C Block Links

The question that often comes up is whether links from the same C Block are some sort of red flag. For the most part, links from the same C Block arenít a problem. Itís okay to get links from your neighbors.

But if youíre only getting links from your neighbors, things start to look a little fishy. Google might suspect that those neighbors arenít entirely legitimate. A nefarious type might set up a slew of domains and have them all link to each other.

Links from 50 domains but just one C Block will look very strange. Links from 50 domains from 45 C Blocks will look just fine.

Bad C Blocks



Sometimes a bad element can move into your neighborhood. If youíre using a shared hosting provider youíre essentially living in an apartment building. Other people live at that address. If every one of them except for you is a notorious porn site, it might not look so great.

This could even happen on a larger level where an entire C Block has been used for some unsavory purpose. In this instance itís not just one building thatís dilapidated, itís the entire neighborhood.

Check Your Neighborhood

Use the Majestic SEO Neighbourhood Checker if youíre moving into a new neighborhood or if youíre just interested in checking up on your neighbors. Thatís how I stumbled upon this SEO C Block.

Sure enough mattcutts.com shares a C Block with seoblackhat.com, home of QuadsZilla. C Block neighbors also include Sphinn, Search Engine Land, Search Engine Journal, Wolf-Howl, Search Marketing Expo and Daggle.

None of these sites are getting dinged by association or even by the fact that they link to each other quite frequently.

TL;DR

An IP address is your home. The C Block is your neighborhood. C Block IP is really only important for SEO if you find out your IP is in a C Block slum.
devv0304 is offline   Reply With Quote
Old 05-02-2012   #45
AussieWebmaster
Forums Editor, SearchEngineWatch
 
AussieWebmaster's Avatar
 
Join Date: Jun 2004
Location: NYC
Posts: 8,153
AussieWebmaster has a brilliant futureAussieWebmaster has a brilliant futureAussieWebmaster has a brilliant futureAussieWebmaster has a brilliant futureAussieWebmaster has a brilliant futureAussieWebmaster has a brilliant futureAussieWebmaster has a brilliant futureAussieWebmaster has a brilliant futureAussieWebmaster has a brilliant futureAussieWebmaster has a brilliant futureAussieWebmaster has a brilliant future
Re: What Are Class C Blocks Of IPs?

great post dev
__________________
Online marketing assistance - we play in traffic.
AussieWebmaster is offline   Reply With Quote
Old 01-11-2013   #46
cooluks
Member
 
Join Date: Jun 2007
Location: Makati
Posts: 39
cooluks is a jewel in the roughcooluks is a jewel in the roughcooluks is a jewel in the roughcooluks is a jewel in the rough
Re: Class C Block of IPs??

Quote:
Originally Posted by onedodd View Post
Can somebody explain this:
Don't cross-link from any domains that you own or any domains that share the same Class C Block of IPs.
OK I know what cross-linking is but....
I have 5 sites and want to mainly just learn the part about linking sites from the same class C IPs. How do I know if they share the same Class "C" IP?

Can different hosts share the same Class C IP? No laughing - I have to learn sometime.

How do I find out if my sites share the same Class C IP?

Thank You - Joe D.
Quote:
The question that often comes up is whether links from the same C Block are some sort of red flag. For the most part, links from the same C Block arenít a problem. Itís okay to get links from your neighbors.

But if youíre only getting links from your neighbors, things start to look a little fishy. Google might suspect that those neighbors arenít entirely legitimate. A nefarious type might set up a slew of domains and have them all link to each other.

Links from 50 domains but just one C Block will look very strange. Links from 50 domains from 45 C Blocks will look just fine. - by AJ Kohn (Blind Five Year Old)
More at:http://www.blindfiveyearold.com/what...ock-ip-address

Other links related to C class IPs:

http://www.seomoz.org/q/websites-on-...ass-ip-address
http://www.seroundtable.com/archives/013543.html


or follow this thread:http://forums.searchenginewatch.com/...ad.php?t=17768
cooluks is offline   Reply With Quote
Old 06-18-2013   #47
jacobobama
 
Posts: n/a
Re: What Are Class C Blocks Of IPs?

Quote:
Originally Posted by Mikkel deMib Svendsen View Post
An IP consist of 4 parts AAA.BBB.CCC.xxx - the first part is called A-class, the second part B-class and the third part C-class. So any IP under the last part will be in the same C-class. So for example:

123.123.123.1 and 123.123.123.2 are in the same C-class but
123.123.123.1 and 123.123.124.1 is in two different C-classes

Many smaller hosts only mange one single or very few C-classes and therefore makes it difficult to get multiple IPs in different C-classes if you host all your sites the same place. Larger hosts have many C-classes (I believe some even have almost full B-classes but unless you specifically request your various sites to be on different C-class IPs you still could end up on the same. It's usually not something hosts care about (in relation to SEO and linking)
I think this the best example of C- class ip. C class ip is bad for your great business because it can reduce your web visibility in the SERP this technique involve in black hat seo and it is spamming technique.
  Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off