Since I'm not in the business of disclosing private datas, I'll simply point out that 1Nbq2XZaRsKknf5fcT2wTXvBS31PaUWSeX is NOT Hashfast.
From a public key alone, you could not know for sure who any of your miners are.
A pool operator could also state this based on IP address(es), fingerprinting the hardware, etc... or simply knowing who that address really is!