According to news on March 10, the Ethereum Kaustinen testnet is now online again. This is the PoS verkle testnet, replacing the Condrieu testnet, this time using block proofs that comply with the new consensus specification.
Kaustinen, a city in Finland with the same postal code as Condrieu, replaces the Condrieu testnet, Guillaume Ballet, core developer of Go-ethereum at the Ethereum Foundation, said on Jan. 27 that the new PoS verkle testnet includes block proofs.