NMC $1.14 -1.15%
Hashrate 494.4 EH/s

u/marcinfejfer

Current Record live

Name u/marcinfejfer
Owner NFDQUB8kFA…GEWDwmG1
Updated 27 Jan 2026, 16:22 UTC 211d ago · height 809,217
Expires 3 Oct 2026, 12:43 UTC approx. in 37d · 5,419 blocks
First registered at 18 Nov 2014, 13:06 UTC 11.8y ago · height 206,012
Last update tx bf57ade59194…a589925033

Value

{
  "website": "http://www.speedupgroup.com",
  "bio": "Early stage VC investor based in Poland. Fan of science-fiction, water sports and whisky.",
  "name": {
    "formatted": "Marcin Fejfer"
  },
  "twitter": {
    "username": "mjfejfer",
    "proof": {
      "url": "https://twitter.com/mjfejfer/status/534414283489046528"
    }
  },
  "cover": {
    "url": "https://s3.amazonaws.com/dx3/marcinfejfer"
  },
  "bitcoin": {
    "address": "1Aurx3kni5G9YTSJuifDW7ChD3bJGSzHnZ"
  },
  "next": "i/marcinfejfer-1",
  "location": {
    "formatted": "Poland"
  },
  "v": 0.2
}

Operation History (11)

TRANSFER Jan 27, 2026 · 04:22 PM UTC blk 809,217
→ NFDQUB8kFA…GEWDwmG1 · bf57ade59194…89925033 inferred
Value 
{
  "website": "http://www.speedupgroup.com",
  "bio": "Early stage VC investor based in Poland. Fan of science-fiction, water sports and whisky.",
  "name": {
    "formatted": "Marcin Fejfer"
  },
  "twitter": {
    "username": "mjfejfer",
    "proof": {
      "url": "https://twitter.com/mjfejfer/status/534414283489046528"
    }
  },
  "cover": {
    "url": "https://s3.amazonaws.com/dx3/marcinfejfer"
  },
  "bitcoin": {
    "address": "1Aurx3kni5G9YTSJuifDW7ChD3bJGSzHnZ"
  },
  "next": "i/marcinfejfer-1",
  "location": {
    "formatted": "Poland"
  },
  "v": 0.2
}
TRANSFER Jun 4, 2025 · 02:37 PM UTC blk 775,140
→ MwRjNYi8GX…rTNLeqky · d92c043aa198…a4e4111c inferred
Value 
{
  "website": "http://www.speedupgroup.com",
  "bio": "Early stage VC investor based in Poland. Fan of science-fiction, water sports and whisky.",
  "name": {
    "formatted": "Marcin Fejfer"
  },
  "twitter": {
    "username": "mjfejfer",
    "proof": {
      "url": "https://twitter.com/mjfejfer/status/534414283489046528"
    }
  },
  "cover": {
    "url": "https://s3.amazonaws.com/dx3/marcinfejfer"
  },
  "bitcoin": {
    "address": "1Aurx3kni5G9YTSJuifDW7ChD3bJGSzHnZ"
  },
  "next": "i/marcinfejfer-1",
  "location": {
    "formatted": "Poland"
  },
  "v": 0.2
}
TRANSFER Oct 8, 2024 · 10:51 AM UTC blk 740,298
→ N9yNBKqMsN…FWwXL94q · 355aa9a14e41…10d2b14f inferred
Value 
{
  "website": "http://www.speedupgroup.com",
  "bio": "Early stage VC investor based in Poland. Fan of science-fiction, water sports and whisky.",
  "name": {
    "formatted": "Marcin Fejfer"
  },
  "twitter": {
    "username": "mjfejfer",
    "proof": {
      "url": "https://twitter.com/mjfejfer/status/534414283489046528"
    }
  },
  "cover": {
    "url": "https://s3.amazonaws.com/dx3/marcinfejfer"
  },
  "bitcoin": {
    "address": "1Aurx3kni5G9YTSJuifDW7ChD3bJGSzHnZ"
  },
  "next": "i/marcinfejfer-1",
  "location": {
    "formatted": "Poland"
  },
  "v": 0.2
}
TRANSFER Feb 17, 2024 · 06:47 PM UTC blk 706,477
→ NH4c3Gysrg…dDoj1Z9q · 610c55d1af68…8c505092 inferred
Value 
{
  "website": "http://www.speedupgroup.com",
  "bio": "Early stage VC investor based in Poland. Fan of science-fiction, water sports and whisky.",
  "name": {
    "formatted": "Marcin Fejfer"
  },
  "twitter": {
    "username": "mjfejfer",
    "proof": {
      "url": "https://twitter.com/mjfejfer/status/534414283489046528"
    }
  },
  "cover": {
    "url": "https://s3.amazonaws.com/dx3/marcinfejfer"
  },
  "bitcoin": {
    "address": "1Aurx3kni5G9YTSJuifDW7ChD3bJGSzHnZ"
  },
  "next": "i/marcinfejfer-1",
  "location": {
    "formatted": "Poland"
  },
  "v": 0.2
}
TRANSFER Jul 22, 2023 · 11:51 AM UTC blk 674,983
→ Mzo6JjX34Y…VDidJaZa · 6a9d7878663d…00f9248f inferred
Value 
{
  "website": "http://www.speedupgroup.com",
  "bio": "Early stage VC investor based in Poland. Fan of science-fiction, water sports and whisky.",
  "name": {
    "formatted": "Marcin Fejfer"
  },
  "twitter": {
    "username": "mjfejfer",
    "proof": {
      "url": "https://twitter.com/mjfejfer/status/534414283489046528"
    }
  },
  "cover": {
    "url": "https://s3.amazonaws.com/dx3/marcinfejfer"
  },
  "bitcoin": {
    "address": "1Aurx3kni5G9YTSJuifDW7ChD3bJGSzHnZ"
  },
  "next": "i/marcinfejfer-1",
  "location": {
    "formatted": "Poland"
  },
  "v": 0.2
}
TRANSFER Nov 30, 2022 · 04:23 PM UTC blk 640,964
→ MzfeXt3kXh…TVKVfLT4 · 133f27fd4ce7…a73e6177 inferred
Value 
{
  "website": "http://www.speedupgroup.com",
  "bio": "Early stage VC investor based in Poland. Fan of science-fiction, water sports and whisky.",
  "name": {
    "formatted": "Marcin Fejfer"
  },
  "twitter": {
    "username": "mjfejfer",
    "proof": {
      "url": "https://twitter.com/mjfejfer/status/534414283489046528"
    }
  },
  "cover": {
    "url": "https://s3.amazonaws.com/dx3/marcinfejfer"
  },
  "bitcoin": {
    "address": "1Aurx3kni5G9YTSJuifDW7ChD3bJGSzHnZ"
  },
  "next": "i/marcinfejfer-1",
  "location": {
    "formatted": "Poland"
  },
  "v": 0.2
}
TRANSFER Apr 13, 2022 · 10:14 PM UTC blk 607,502
→ N3J37JLyq2…h89x4RkB · feba47bc52ae…681680cd inferred
Value 
{
  "website": "http://www.speedupgroup.com",
  "bio": "Early stage VC investor based in Poland. Fan of science-fiction, water sports and whisky.",
  "name": {
    "formatted": "Marcin Fejfer"
  },
  "twitter": {
    "username": "mjfejfer",
    "proof": {
      "url": "https://twitter.com/mjfejfer/status/534414283489046528"
    }
  },
  "cover": {
    "url": "https://s3.amazonaws.com/dx3/marcinfejfer"
  },
  "bitcoin": {
    "address": "1Aurx3kni5G9YTSJuifDW7ChD3bJGSzHnZ"
  },
  "next": "i/marcinfejfer-1",
  "location": {
    "formatted": "Poland"
  },
  "v": 0.2
}
REGISTER Aug 28, 2021 · 03:09 AM UTC blk 573,931
→ MxbUgsJmn1…7W2HzgaP · 04731e78cdf5…4dcf79e1
Value 
{
  "website": "http://www.speedupgroup.com",
  "bio": "Early stage VC investor based in Poland. Fan of science-fiction, water sports and whisky.",
  "name": {
    "formatted": "Marcin Fejfer"
  },
  "twitter": {
    "username": "mjfejfer",
    "proof": {
      "url": "https://twitter.com/mjfejfer/status/534414283489046528"
    }
  },
  "cover": {
    "url": "https://s3.amazonaws.com/dx3/marcinfejfer"
  },
  "bitcoin": {
    "address": "1Aurx3kni5G9YTSJuifDW7ChD3bJGSzHnZ"
  },
  "next": "i/marcinfejfer-1",
  "location": {
    "formatted": "Poland"
  },
  "v": 0.2
}
TRANSFER Sep 10, 2015 · 04:37 PM UTC blk 248,328
→ NFwiSN7fXF…Cs1CPVTF · 51aa32686e06…81021a9d inferred
Value 
{
  "website": "http://www.speedupgroup.com",
  "bio": "Early stage VC investor based in Poland. Fan of science-fiction, water sports and whisky.",
  "name": {
    "formatted": "Marcin Fejfer"
  },
  "twitter": {
    "username": "mjfejfer",
    "proof": {
      "url": "https://twitter.com/mjfejfer/status/534414283489046528"
    }
  },
  "cover": {
    "url": "https://s3.amazonaws.com/dx3/marcinfejfer"
  },
  "bitcoin": {
    "address": "1Aurx3kni5G9YTSJuifDW7ChD3bJGSzHnZ"
  },
  "next": "i/marcinfejfer-1",
  "location": {
    "formatted": "Poland"
  },
  "v": 0.2
}
REGISTER Aug 6, 2015 · 07:58 PM UTC blk 242,779
→ N3gexPZAVW…rwuXsxLr · 2a1ea1bdb43c…6d683fb6
Value 
{
  "website": "http://www.speedupgroup.com",
  "bio": "Early stage VC investor based in Poland. Fan of science-fiction, water sports and whisky.",
  "name": {
    "formatted": "Marcin Fejfer"
  },
  "twitter": {
    "username": "mjfejfer",
    "proof": {
      "url": "https://twitter.com/mjfejfer/status/534414283489046528"
    }
  },
  "cover": {
    "url": "https://s3.amazonaws.com/dx3/marcinfejfer"
  },
  "bitcoin": {
    "address": "1Aurx3kni5G9YTSJuifDW7ChD3bJGSzHnZ"
  },
  "next": "i/marcinfejfer-1",
  "location": {
    "formatted": "Poland"
  },
  "v": 0.2
}
REGISTER Nov 18, 2014 · 01:06 PM UTC blk 206,012
→ MzAVR8SFsb…dxFwcugg · 6205e1dd907a…4a613c67
Value 
{
  "website": "http://www.speedupgroup.com",
  "bio": "Early stage VC investor based in Poland. Fan of science-fiction, water sports and whisky.",
  "name": {
    "formatted": "Marcin Fejfer"
  },
  "twitter": {
    "username": "mjfejfer",
    "proof": {
      "url": "https://twitter.com/mjfejfer/status/534414283489046528"
    }
  },
  "cover": {
    "url": "https://s3.amazonaws.com/dx3/marcinfejfer"
  },
  "bitcoin": {
    "address": "1Aurx3kni5G9YTSJuifDW7ChD3bJGSzHnZ"
  },
  "next": "i/marcinfejfer-1",
  "location": {
    "formatted": "Poland"
  },
  "v": 0.2
}