Top 25 internet service providers for IPv6 speed in Germany (Nov 2023)ISPTest countIPv6 average 1. GELSEN-NET Kommunikationsgesellschaft mbH 5 392.6 Mbps 2. Openfactory 19 333.6 Mbps 3. Tele Columbus AG 486 274.3 Mbps 4. Netcom Kassel Gesellschaft fuer Telekommunikation mbH 28 234.1 Mbps ...