Can someone explain, whether or not it a bug at Ethereum wallet address?

[Chaser123]

We know that ethereum wallet address starts with 0x
But I found some addresses at blockchain.com that starts with prefix 1,
I found many of such addresses that starts with prefix 1 but its an Ethereum wallet addresses.
The address seems to be like Bitcoin, but it shows up as Ethereum wallet address at blockchain com

I have the screenshot image of those addresses, but I am not allowed to upload it at this post. If someone want's to see it, then pm me.

It seems impossible.
Don't know,
Whether it's a blockchain.com error.
Or error at Ethereum blockchain itself.