About this denylist

CARIAD is intended to provide new service providers a basic, first step in reflecting the domain blocking activity demonstrated by high volume, well-regarded service providers, as a means to observe the most widely-blocked domains. IFTAS Needs Assessment respondents; community members; and advisors have asked for a shared knowledge of the most commonly blocked domains. The CARIAD list reflects the observed domain blocks affecting roughly 50% of all Mastodon accounts.

CARIAD combines data from two sources:

1. A curated aggregation of the blocks in place on high volume and well-moderated Mastodon service providers. To be eligible for observation, each service provider is reviewed for the following criteria:
   1. Have been in service for at least 6 months;
   2. Themselves have a demonstrable set of domain blocks already in place;
   3. Not themselves appear on the IFTAS denylists.
2. The IFTAS Do Not Interact list, a manually-reviewed list of domains labelled by harm.

Read the full policy specification.

Download / subscribe

Important Deployment Note for Admins: > Because CARIAD is an observational aggregate reflecting the established blocks of major Fediverse services, threads.net (Meta) is currently included on this list based on widespread community defederation.

If your server intends to federate with Threads, please ensure you review your local import settings to explicitly allow threads.net before applying the full CARIAD denylist.

iftas-cariad-latest.csv (Mastodon import format)

The permanent file location is:

https://about.iftas.org/wp-content/uploads/2026/06/iftas-cariad-latest.csv

(The file path includes ‘/2026/06’ which will not change; the current version will overwrite any previous version at this URL)

See Denylist Management Tools for third-party tools to import or implement this denylist.

View current denylist

IFTAS CARIAD Denylist Output – HTML table view of this denylist

Bias

The inclusion criteria is a mix of North American, Western European and Southeast Asian service providers. This biases the list in favour of white and global north speech and prejudices, and as such should be used only by new service providers who are comfortable reflecting the aggregated views of white or global north service providers.

Additionally, the sources represent some of the largest service providers, who have generally favoured preserving relationships over blocking speech and content, and therefore are less likely to take action against domains that others may consider worthy of blocking. Larger service providers are also less hesitant to block a small service with few accounts, which may lead to unintended aggregation of this bias.

Domain Inclusion Criteria

As new entries become eligible for inclusion, they are reviewed by IFTAS. If approved for inclusion, entries are listed with the majority recommendation. Domains listed on the IFTAS DNI list are included at the IFTAS severity level, regardless of observed sources.

The database and its associated lists is reviewed at least quarterly by IFTAS to ensure the criteria are working as intended, and not causing harm to any community.

Domain Exclusion Criteria

As and when domains fail to meet inclusion they will be delisted.

Appeals

In order to appeal a listing, a request must be sent from an address at the listed domain (eg: [email protected]) to our contact address below, with evidence that the issue has been resolved. We may verify the address by sending back a confirmation message asking for a response.

Delisting requests must be sent to the delisting email address, written in English language, in text form: delist-cariad (a) iftas (.) org

Requests are typically investigated and processed within three business days.

All delistings are free of charge.

Listing Longevity

As an observational list, all listings are observed and reported. Each individual listing will remain on the list for as long as a listing is visible on any of the sources and meets the requisite threshold.

Access

Access to the CARIAD list will be free and available via the domain observatory service. No payment is required for use of the list, nor for listing or delisting requests.

Public Feedback

Members of the public may make enquiries about the list, or raise issues, using the email [email protected]