ICANN CZDS

The ICANN Centralized Zone Data Service (CZDS) allows approved users to request and download DNS zone files in bulk, provided they represent a legitimate company or academic institution and their intended use is legal and ethical. Once ICANN approves the request, this tool streamlines the retrieval of extensive domain name system data, facilitating research and security analysis in the realm of internet infrastructure.

Zone Information

Zone files are updated once every 24 hours, specifically from 00:00 UTC to 06:00 UTC. Access to these zones is granted in increments, and the total time for approval across all zones may extend to a month or longer. It is typical for more than 90% of requested zones to receive approval. Access to certain zone files may require additional application forms with the TLD organization. Please be aware that access to certain zones is time-bound, expiring at the beginning of the following year, or up to a decade after the initial approval has been confirmed.

At the time of writing this repository, the CZDS offers access to 1,150 zones in total.

1,076 have been approved, 58 are still pending (after 3 months), 10 have been revoked because the TLDs are longer active, and 6 have been denied.

Usage

Authentication

Credentials may be provided interactively upon execution or via the CZDS_USER & CZDS_PASS environment variables:

export CZDS_USER='your_username'
export CZDS_PASS='your_password'

Python version

python czds.py [--username <username> --password <password>] [--concurrency <int>]

POSIX version

./czds

Respects

While ICANN does have an official czds-api-client-python repository, I rewrote it from scratch to be more streamline & included a POSIX version for portability. Either way, big props to ICANN for allowing me to use the CZDS for research purposes!

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Mirrors

acid.vegas • GitHub • GitLab • SuperNETs