List of currently working Teredo servers and relays.

Teredo servers

It seems like Teredo is dead except for the purpose of relaying.

Microsoft servers

These servers allow only to connect to other Teredo addresses on the same server for the purpose of NAT traversal.

1. win10.ipv6.microsoft.com
2. win1910.ipv6.microsoft.com

Currently down

1. TREX Regional Exchanges: teredo.trex.fi (Down since December 2022)
2. Remlab: teredo.remlab.net (Rerouted to TREX)
3. August Internet: teredo.august.tw (Down since September 2024)
4. iks-jena.de: teredo.iks-jena.de (Down since January 2026)

Teredo relays

1. Hurricane Electric