View Contact Nickolai Zeldovich <nickolai AT csail dot mit dot edu> Details

📋 Contact & Network Overview

Network Summary:
  • Bandwidth Capacity: ~376.25 Mbit/s (376.25 Mbit/s guard)
  • Total Data Transferred: 1.3 PB (0.02% of 5yr network data)
  • Network Influence: 0.01% of overall consensus weight (0.03% guard)
  • Network Position: Guard-only (4 total relays, 4 guards)

📊 Operator Intelligence

  • Network Diversity: Great, 1 network (legendary)
  • Geographic Diversity: Poor, 1 country (4 relays)
  • Infrastructure Diversity: Poor, 1 platform
  • Bandwidth Capacity Measurements: 4/4 relays measured by authorities
  • Performance Insights: Overall CW/BW: 502. -61% lower than 1279 network average. 28th percentile with 803 median.
    • Guard CW/BW: 502. -53% lower than 1061 network average. 17th percentile with 1001 median.
  • Operational Maturity: Operating since 2024-05-01 (expanded through 2025-05-19)
  • Version Compliance: All, 4 (100%) compliant
    • Version Status: All, 4 (100%) recommended
  • Family Support: 4 MyFamily (100%)

🚀 Bandwidth Reliability

Operator Performance:
  • Average Relay Throughput: 6mo 26.25 Mbit/s avg (4 relays), 1y 20.40 Mbit/s avg (4 relays), 5y 20.03 Mbit/s avg (4 relays)
    • No bandwidth outliers detected
  • Performance Analysis (6mo):
    • Stability: Great (Coefficient of Variation: 2.3% = 596.59 Kbit/s σ / 26.25 Mbit/s μ)
    • Trend: Growth (+91.1%) for most recent (Sep 02 - Nov 02, 2026) vs least recent (May 03 - Jul 03, 2026)
    • Capacity Utilization: 27% of all-time peak capacity (current 6mo avg vs all-time 5yr peak)
Network Comparison:
  • Network Position: Top 50% (50th-75th percentile)
  • Network Contribution: 6mo 105.00 Mbit/s avg (183 days), 1y 81.61 Mbit/s avg (183 days), 5y 66.59 Mbit/s avg (92 days)
Bandwidth Stability: Great (Top 25% most stable), Good (25-50% most stable), Variable (25-50% most stable), Extreme (Bottom 10% most variable)
Reliability data available for 4/4 relays, from 2026-11-04 17:00:00 UTC

⏰ Relay Reliability

  • Overall Uptime: 30d 99.4% (4 relays), 6mo 99.7% (4 relays), 1y 99.9% (4 relays), 5y 99.9% (4 relays)
    • ✅ No statistical outliers detected - consistent performance across all relays
    • Network Uptime (6mo): 5th Pct: 87%, 25th Pct: 98%, 50th Pct: 99%, 75th Pct: 100%, Operator: 100%, 90th Pct: 100%, 95th Pct: 100%, 99th Pct: 100%
  • Offline: 0 relays
Reliability data available for 4/4 relays, from 2026-11-04 17:00:00 UTC

🏷️ Flag Reliability

Flag-specific uptime percentages (1M/6M/1Y/5Y):
🛡️ Stable Operation: 99.4% / 99.6% / 99.8% / 99.9%
⚡ Fast Relay: 99.4% / 99.7% / 99.9% / 99.9%
🟢 Running Operation: 99.4% / 99.7% / 99.9% / 99.9%
🛡️ Entry Guard: 99.4% / 99.6% / 99.8% / 99.9%
📂 Hidden Services: 32.0% / 39.7% / 51.4% / 59.4%
📁 Directory Services: 99.4% / 99.7% / 99.9% / 99.9%
Excellent (>99%), Below average (<μ of network), Poor (≥2σ from network μ) , from 2026-11-04 17:00:00 UTC

🚀 Flag Bandwidth Performance

Flag-specific bandwidth averages (6M/1Y/5Y):
🛡️ Entry Guard: 26.25 Mbit/s / 20.40 Mbit/s / 20.03 Mbit/s
⚡ Fast Relay: 26.25 Mbit/s / 20.40 Mbit/s / 20.03 Mbit/s
🟢 Running: 26.25 Mbit/s / 20.40 Mbit/s / 20.03 Mbit/s
📁 Hidden Service Directory: 26.25 Mbit/s / 20.40 Mbit/s / 20.03 Mbit/s
🎯 Stable Relay: 26.25 Mbit/s / 20.40 Mbit/s / 20.03 Mbit/s
📋 Version 2 Directory: 26.25 Mbit/s / 20.40 Mbit/s / 20.03 Mbit/s
High performance (>1.5x μ), Below average (<μ of network), Poor (≥2σ from network μ)
Bandwidth
Operator throughput and write/read, last 6 months Operator throughput and write/read, last year Operator throughput and write/read, last 5 years Operator throughput and write/read, last 30 days
1M 6M 1Y 5Y
Uptime
Operator uptime, last 6 months Operator uptime, last year Operator uptime, last 5 years Operator uptime, last 30 days
1M 6M 1Y 5Y

Last updated: Wed, 04 Nov 2026 18:45:16 GMT. Refreshed every 30 minutes from the Tor directory authorities via Tor Project's onionoo API.

Status Nickname BW Cap (376.25 Mbit/s) Total Data Uptime/Downtime Uptime (1M/6M/1Y/5Y) Flag Uptime (1M/6M/1Y/5Y) IPv4 Flags DNS Family Country AS Number AS Name ▾ Platform First Seen Last Restarted IPv6
pdos (4) 95.01 Mbit/s   ✓ 512 TB UP 5d 12h 17m ago 99.2%/99.6%/99.8%/99.8% —/99.3%/99.7%/— 128.52.132.189 FastGuardHSDirRunningStableV2DirValid NA MyFamily United States of America US AS3 Massachusetts... Linux 2y 6mo 1w ago 5d 12h 17m ago 2603:400a:0:9:f816:3eff:fe73:f862 OK
pdos02 (4) 108.27 Mbit/s   ✓ 192 TB UP 5d 12h 17m ago 99.3%/99.7%/99.8%/99.9% Match 128.52.132.189 FastGuardHSDirRunningStableV2DirValid NA MyFamily United States of America US AS3 Massachusetts... Linux 1y 5mo 2w ago 5d 12h 18m ago 2603:400a:0:9:f816:3eff:fe73:f862 OK
pdos00 (4) 86.80 Mbit/s   ✓ 425 TB UP 5d 12h 17m ago 99.5%/99.7%/99.9%/99.9% Match 128.52.132.189 FastGuardHSDirRunningStableV2DirValid NA MyFamily United States of America US AS3 Massachusetts... Linux 2y 6mo 4d ago 5d 12h 17m ago 2603:400a:0:9:f816:3eff:fe73:f862 OK
pdos01 (4) 86.17 Mbit/s   ✓ 197 TB UP 5d 12h 17m ago 99.5%/99.7%/99.9%/99.9% Match 128.52.132.189 FastGuardHSDirRunningStableV2DirValid NA MyFamily United States of America US AS3 Massachusetts... Linux 1y 5mo 2w ago 5d 12h 18m ago 2603:400a:0:9:f816:3eff:fe73:f862 OK