Historic Index Update

By Alex May 29, 2012

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.

Posted In: Updates

5 Responses to “Historic Index Update”

  1. bellandy said:

    May 30, 2012 at 4:18 pm

    How often do you update historic index? Thanks!

    • Dixon said:

      May 30, 2012 at 6:13 pm

      Every month. (Although the Fresh index gets updated every day)

      • bellandy said:

        May 31, 2012 at 12:53 pm

        > Thanks!

  2. Jen said:

    May 31, 2012 at 7:10 pm

    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!

    • Dixon said:

      May 31, 2012 at 7:22 pm

      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.