I would like to share the link with Bitcoin address analyzer:

https://allprivatekeys.com/whose-bitcoin-address.php

Find address owner, mentions about Bitcoin address on the Internet, Forums (bitcointalk included), scam alerts, and other metadata.

AllPrivateKeys.com is a service to check the safety of Bitcoin and Altcoin networks, explain how Blockchain works, show problems of algorithm and add some fun to cryptography. You can findout thousands leaked private keys, weak brainwallet passwords, vulnerability of transactions sign and common vector attacks.

I would like to share the Bitcoin tracking service:

Track who's who in the world of Bitcoin,
Bitcoin Address Check to see if it has been reported as a scam,
View and searches ownership mentions,
Check balances and transactions (it's a short Blockchain Explorer without deep technical data).

Service is totally FREE:
https://allprivatekeys.com/whose-bitcoin-address.php

For example try these addresses:
1BitcoinEaterAddressDontSendf59kuE
1M8s2S5bgAzSSzVTeL7zruvMPLvzSkEAuv
1NxaBCFQwejSZbQfWcYNwgqML5wWoE3rK4

Service convenient for ICO, crowdfunding, fintech analyze, KYC and just for curiosity. We still collect mentions and server can be slow.
When we finish gathering DB we will create free API.
Also, we have DB with leaked private keys 1.9Mln, about 30k keys with TXs in past, 19k+ brainwallets with TXs in past and altcoins private keys.