[alvaroag]

No, it's not posible, you can only get is as an option when you order a domain at OVH.

https://www.ovh.co.uk/domains/dns-anycast/

* Anycast DNS will be offered to you as an option when you order a domain.

[diommo]

Hello

Is it possible to buy the service Anycast DNS for domains registered with other registrars? I do not want to transfer domains, I only need this service.

On your site I didn't find a way to buy this service for the registered domains without their transfer.

Thanks.