Extended Delegation Statistics

ARIN publishes extended delegation statistics files in accordance with the Number Resource Organization’s (NRO) standardized format for each Regional Internet Registry to report the status of Internet number resources within their regions.

The delegated-extended file contains a daily updated report of the distribution of Internet number resources:

  • IPv4 address ranges
  • IPv6 address ranges
  • Autonomous System Numbers (ASNs)

Note: This report does not include reallocation or reassignment data.

File Availability

Extended statistics files (filenames containing “delegated-arin-extended-YYYYMMDD”) are available for use via HTTP or FTP at:

For a detailed description of the file and interpretation of this content, a Readme file is available.

Archives for previous years are also available via FTP and HTTP.