Data Center IPv6 Feed

Overview

The Data Center IPv6 Feed provides a list of known IPv6 ranges belonging to hosting and cloud infrastructure. Traffic originating from IP ranges on the list comes from server infrastructure rather than legitimate human activity. Such traffic is classified as General Invalid Traffic (GIVT) under MRC guidelines, and filtering it is required to reduce IVT.

Methodology

Pixalate curates, validates, and evaluates every range in the blocklists. Provider-published IP ranges and externally maintained open-source lists serve as inputs, which Pixalate verifies, deduplicates, and monitors before inclusion, alongside data center ranges identified and maintained by Pixalate's own detection.

False-positive engineering is central to the methodology: the blocklists exclude mixed-use IP ranges that carry legitimate consumer traffic — such as Apple iCloud Private Relay egress ranges and VPN providers — consistent with MRC guidance to exclude routing artifacts of legitimate users.

File Format and Delivery

File Format	CSV
Delivery Method	FTP, S3, AWS RTB Fabric, APIs
Naming Convention	DatacenterSubnetsWeek[WeekNum]. Notes: the week number resets to 1 at the start of each new year. Weeks 1–9 use a single digit; weeks 10 and onward use two digits. Examples: DatacenterSubnetsWeek1, DatacenterSubnetsWeek2, DatacenterSubnetsWeek10, DatacenterSubnetsWeek11
Update Frequency	Weekly (estimated availability Fridays 12:00 AM UTC)

Schema

A list of IPv6 CIDR Ranges (no header).

Example:

2001:bc8:1400::/38

2001:bc8:1800::/38

2001:bc8:1c00::/38

2001:bc8:4000::/38

2001:bc8:5000::/38

2a01:e10::/30

2a01:e11::/32

2a01:e11:2000::/36

2a01:e11:5000::/36

2a01:e11:6000::/36

Integration Best Practices

Check once every hour on Friday
Download only when a new file is available
Stop pinging once the new file is found