Block linksage and IP checking.

Do you check for multiple IP's and How?

[cleanup]

I may be off the mark here but as I understand it Google (and perhaps others) do not count links from multiple URLs fro mthe same IP.

If that is so then when offered a link exchange from
say
blue.widgets.com
red.widgets.com
blue-and-red.widgets.com

etc

will Google count this as 1 or 3 links?

If only one is there an easy way for to check if
we are dealing with multiple or unique IPs.

seems I often just hope for the best with these exchanges.

[Lord Majestic]

Its the same widgets.com domain -- no need to check IP since its already clear that subdomains are likely to be under control of a person who controls main domain, and therefore all links should be taken with a pinch of salt.

[cleanup]

Thanks Majestic. What do you do in these situations just offer
one link?

They always say that the IPs are unique and sometimes in the case of say.. hotel chains, product ranges etc it just might be true. So is there a tool out there that can check?

I get from your answer Majestic that its the unique registered person that is the important thing for a Domain rather than its IP number. Am I correct in that assumption?

[Lord Majestic]

I think there are two different issues here:
1) counting number of links
2) assigning rank value to said links

Actual counting could include all links, including those from same domain and subdomains. However it is reasonable to assume that those links that can be judged as under control of the end user by looking at whether its same domain (like in your example), or same IP, or same subnet, or blog or BBS like this, then rank value assigned to those links could be 0.

My take on subdomains is that sites that use multiple non-standard (ie non-www) subdomains, particularly with keywords separated by -'s, are begging to be classified as spam pages.

If you want to check IPs then you can use one of the many DNS tools available online, or the most primitive such as ping command that will resolve domain name and show its IP before pinging. I would be very suprised if someone who engaged in linking activities that involve lots of subdomains like above would have luxury of assigning unique IPs to them.

[cleanup]

Thanks Majestic. It has been so long since I touched a UNIX box that I had forgotten all about ping!