The blockchain is splitted into 2 branch at 268522 block height.
One branch is going to 272276 block (and stopped there), the block explore is on this.
The second branch is going 308389 (and stopped there), the 144.76.100.197 client is here. There is other client (106.187.41.34) on this branch, but he is stopped at 284784.

Other wallets are below than 268522.