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

📋 Contact & Network Overview

Network Summary:
  • Bandwidth Capacity: ~705.41 Mbit/s (705.41 Mbit/s guard)
  • Total Data Transferred: 975 TB (0.02% of 5yr network data)
  • Network Influence: 0.02% of overall consensus weight (0.04% guard)
  • Network Position: Guard-only (4 total relays, 4 guards)

📊 Operator Intelligence

  • Network Diversity: Great, 1 network (epic)
  • Geographic Diversity: Poor, 1 country
  • Infrastructure Diversity: Poor, 1 platform
  • Bandwidth Capacity Measurements: 4/4 relays measured by authorities
  • Performance Insights: Overall CW/BW: 506. -53% lower than 1070 network average. 27th percentile with 842 median.
    • Guard CW/BW: 506. -40% lower than 850 network average. 13th percentile with 955 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 16.12 Mbit/s avg (4 relays), 1y 14.20 Mbit/s avg (4 relays), 5y 17.19 Mbit/s avg (4 relays)
    • No bandwidth outliers detected
  • Performance Analysis (6mo):
    • Stability: Great (Coefficient of Variation: 12.7% = 2.04 Mbit/s σ / 16.12 Mbit/s μ)
    • Trend: Stable (+2.0%) for most recent (May 03 - Jul 02, 2026) vs least recent (Jan 02 - Mar 03, 2026)
    • Capacity Utilization: 17% 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 64.48 Mbit/s avg (181 days), 1y 56.80 Mbit/s avg (183 days), 5y 57.43 Mbit/s avg (79 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 2026-07-03 01:00:00 UTC

⏰ Relay Reliability

  • Overall Uptime: 30d 99.9% (4 relays), 6mo 100.0% (4 relays), 1y 100.0% (4 relays), 5y 99.9% (4 relays)
    • ✅ No statistical outliers detected - consistent performance across all relays
    • Network Uptime (6mo): 5th Pct: 75%, 25th Pct: 98%, 50th Pct: 100%, Operator: 100%, 75th Pct: 100%, 90th Pct: 100%, 95th Pct: 100%, 99th Pct: 100%
  • Offline: 0 relays
Reliability data available for 4/4 relays, from 2026-07-03 01:00:00 UTC

🏷️ Flag Reliability

Flag-specific uptime percentages (1M/6M/1Y/5Y):
🛡️ Stable Operation: 99.9% / 100.0% / 100.0% / 99.9%
⚡ Fast Relay: 99.9% / 100.0% / 100.0% / 99.9%
🟢 Running Operation: 99.9% / 100.0% / 100.0% / 99.9%
🛡️ Entry Guard: 99.9% / 100.0% / 100.0% / 99.9%
📁 Directory Services: 99.9% / 100.0% / 100.0% / 99.9%
Excellent (>99%), Below average (<μ of network), Poor (≥2σ from network μ) , from 2026-07-03 01:00:00 UTC

🚀 Flag Bandwidth Performance

Flag-specific bandwidth averages (6M/1Y/5Y):
🛡️ Entry Guard: 16.12 Mbit/s / 14.20 Mbit/s / 17.19 Mbit/s
⚡ Fast Relay: 16.12 Mbit/s / 14.20 Mbit/s / 17.19 Mbit/s
🟢 Running: 16.12 Mbit/s / 14.20 Mbit/s / 17.19 Mbit/s
🎯 Stable Relay: 16.12 Mbit/s / 14.20 Mbit/s / 17.19 Mbit/s
📋 Version 2 Directory: 16.12 Mbit/s / 14.20 Mbit/s / 17.19 Mbit/s
High performance (>1.5x μ), Below average (<μ of network), Poor (≥2σ from network μ)

Last updated: Fri, 03 Jul 2026 03:11:23 GMT. Refreshed every 30 minutes from the Tor directory authorities via Tor Project's onionoo API.

Status Nickname BW Cap (705.41 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
pdos01 (4) 138.35 Mbit/s   ✓ 110 TB UP 20h 29m 43s ago 100.0%/100.0%/100.0%/100.0% Match 128.52.132.189 FastGuardRunningStableV2DirValid NA MyFamily United States of America US AS3 Unknown Linux 1y 1mo 2w ago 20h 31m 56s ago N/A
pdos02 (4) 113.43 Mbit/s   ✓ 102 TB UP 20h 29m 42s ago 100.0%/100.0%/100.0%/100.0% Match 128.52.132.189 FastGuardRunningStableV2DirValid NA MyFamily United States of America US AS3 Unknown Linux 1y 1mo 2w ago 20h 31m 55s ago N/A
pdos00 (4) 77.47 Mbit/s   ✓ 344 TB UP 20h 29m 42s ago 100.0%/100.0%/100.0%/100.0% Match 128.52.132.189 FastGuardRunningStableV2DirValid NA MyFamily United States of America US AS3 Unknown Linux 2y 2mo 1h ago 20h 31m 55s ago N/A
pdos (4) 376.17 Mbit/s   ✓ 419 TB UP 20h 29m 39s ago 99.6%/99.9%/100.0%/99.8% Match 128.52.132.189 FastGuardRunningStableV2DirValid NA MyFamily United States of America US AS3 Unknown Linux 2y 2mo 3d ago 20h 31m 52s ago N/A