Backblaze

ASN Official

Backblaze publishes CIDR ranges used by Computer Backup and B2 Cloud Storage. Marketing sites (www/help/docs) may ride on Cloudflare and will not match these blocks. Prefer domain allowlists (*.backblaze.com / *backblazeb2.com) when possible — ranges can change.

Autonomous systems (ASNs)

Known ASNs used by Backblaze.

AS40401

Backblaze Computer Backup & B2

Documentation

Docs table only — not a machine-readable feed. Ranges are shared by Computer Backup and B2.

https://www.backblaze.com/computer-backup/docs/backblaze-ip-addresses

Documentation

Backblaze Help - IP Address List
Backblaze - Peering policy (AS40401)

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