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Using Cloudflare's Roughtime Service

Our service can be reached at The domain resolves to an IP address in our anycast IP range. You can use either IPv4 or IPv6.

Cloudflare-Roughtime is currently in beta. As such, our root public key may change in the future. We will keep this page up-to-date with the most current public key. You can also obtain it programmatically using DNS. For example:

$ dig TXT | grep -oP 'TXT\s"\K.*?(?=")'