We have now updated the Historic Index for this month so that it now contains link data all the way from September 2006 through to April 26th 2012.

The vital statistics as of today are:

370,968,872,279
Unique pages crawled

3,813,432,969,252
Unique URLs

Backlinks Date range:
24 Sep 2006 to 26 Apr 2012.

Comments

  • bellandy

    How often do you update historic index? Thanks!

    May 30, 2012 at 4:18 pm
  • Jen

    Hi, I wanted a little clarification on historic v/s fresh index. If a site has 100 backlinks in historic index, and 50 backlinks in fresh index, then, what will be the total amount of current (active) backlinks to site? 50 or 100? I’m jumbled up!

    May 31, 2012 at 7:10 pm
    • Dixon

      Hi Jen,
      Neither of the above scenarios! Fresh means URLS seen in the last 45 days. Some of these will be in the current index, and others won’t, because they are too new. Old links can (and should) be in the fresh index, however, many URLS in the historic index get so few inlinks themselves, that our crawlers rarely recrawl them. This means that the fresh index is a realistic view of “current URLS that people are likely to actually see”. Nothing is perfect, though.

      May 31, 2012 at 7:22 pm

Comments are closed.