September 2017 Crawl Archive Now Available

The crawl archive for September 2017 is now available! The archive is located in the commoncrawl bucket at crawl-data/CC-MAIN-2017-39/. It contains 3.01 billion web pages and over 250 TiB of uncompressed content.

To improve coverage and freshness we added one billion new URLs (not contained in any crawl archive before):

  • 300 million URLs are a random sample extracted from sitemaps if provided by any of the top 60 million hosts taken from the May/June/July 2017 webgraph data set
  • 500 million URLs were found by a side crawl within a maximum of 3 links (“hops”) away from the home pages of the top 60 million hosts and from a list of university domains collected by a Common Crawl user
  • 200 million URLs are randomly chosen from WAT files of the August crawl

To assist with exploring and using the dataset, we provide gzipped files which list all segments, WARC, WAT and WET files.
By simply adding either s3://commoncrawl/ or to each line, you end up with the S3 and HTTP paths respectively.

File List#FilesTotal Size
Compressed (TiB)
WARC filesCC-MAIN-2017-39/warc.paths.gz7200059.13
WAT filesCC-MAIN-2017-39/wat.paths.gz7200020.1
WET filesCC-MAIN-2017-39/wet.paths.gz720008.86
Robots.txt filesCC-MAIN-2017-39/robotstxt.paths.gz720000.16
Non-200 responses filesCC-MAIN-2017-39/non200responses.paths.gz720002.07
URL index filesCC-MAIN-2017-39/cc-index.paths.gz3020.23

The Common Crawl URL Index for this crawl is available at: For more information on working with the URL index, please refer to the previous blog post or the Index Server API. There is also a command-line tool client for common use cases of the URL index.

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