Out of the tree biggest ISPs in Slovakia, only T-Com doesn't support IPv6, unlike it's German parent. UPC (Liberty Global) switched all their residential custom

Out of the tree biggest ISPs in Slovakia, only T-Com doesn't support IPv6, unlike it's German parent. UPC (Liberty Global) switched all their residential customers with new enough CPE to DS-Lite years ago, and Orange also had a flag day, since then all new customers are also on DS-Lite (they allow getting public IPv4 for nice 99 EUR one-time fee, static one is additional 8 EUR/month).