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

📋 Contact & Network Overview

Network Summary:
  • Bandwidth Capacity: ~666.74 Mbit/s (666.74 Mbit/s guard)
  • Total Data Transferred: 1.0 PB (0.02% of 5yr network data)
  • Network Influence: 0.02% of overall consensus weight (0.05% 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: 605. -48% lower than 1159 network average. 35th percentile with 811 median.
    • Guard CW/BW: 605. -30% lower than 862 network average. 29th percentile with 891 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 18.42 Mbit/s avg (4 relays), 1y 15.64 Mbit/s avg (4 relays), 5y 17.76 Mbit/s avg (4 relays)
    • No bandwidth outliers detected
  • Performance Analysis (6mo):
    • Stability: Great (Coefficient of Variation: 9.3% = 1.71 Mbit/s σ / 18.42 Mbit/s μ)
    • Trend: Growth (+41.4%) for most recent (May 24 - Jul 23, 2026) vs least recent (Jan 23 - Mar 24, 2026)
    • Capacity Utilization: 19% 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 73.69 Mbit/s avg (181 days), 1y 62.56 Mbit/s avg (183 days), 5y 59.11 Mbit/s avg (81 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 2026-07-25 06:00:00 UTC

⏰ Relay Reliability

  • Overall Uptime: 30d 99.6% (4 relays), 6mo 99.9% (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: 80%, 25th Pct: 98%, 50th Pct: 100%, 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 2026-07-25 06:00:00 UTC

🏷️ Flag Reliability

Flag-specific uptime percentages (1M/6M/1Y/5Y):
🛡️ Stable Operation: 99.6% / 99.9% / 100.0% / 99.9%
⚡ Fast Relay: 99.6% / 99.9% / 100.0% / 99.9%
🟢 Running Operation: 99.6% / 99.9% / 100.0% / 99.9%
🛡️ Entry Guard: 99.6% / 99.9% / 100.0% / 99.9%
📂 Hidden Services: 38.8% / 50.7% / 60.3% / 64.9%
📁 Directory Services: 99.6% / 99.9% / 100.0% / 99.9%
Excellent (>99%), Below average (<μ of network), Poor (≥2σ from network μ) , from 2026-07-25 06:00:00 UTC

🚀 Flag Bandwidth Performance

Flag-specific bandwidth averages (6M/1Y/5Y):
🛡️ Entry Guard: 18.42 Mbit/s / 15.64 Mbit/s / 17.76 Mbit/s
⚡ Fast Relay: 18.42 Mbit/s / 15.64 Mbit/s / 17.76 Mbit/s
🟢 Running: 18.42 Mbit/s / 15.64 Mbit/s / 17.76 Mbit/s
📁 Hidden Service Directory: 18.42 Mbit/s / 15.64 Mbit/s / 17.76 Mbit/s
🎯 Stable Relay: 18.42 Mbit/s / 15.64 Mbit/s / 17.76 Mbit/s
📋 Version 2 Directory: 18.42 Mbit/s / 15.64 Mbit/s / 17.76 Mbit/s
High performance (>1.5x μ), Below average (<μ of network), Poor (≥2σ from network μ)

Last updated: Sat, 25 Jul 2026 11:16:24 GMT. Refreshed every 30 minutes from the Tor directory authorities via Tor Project's onionoo API.

Status Nickname BW Cap (666.74 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) 338.00 Mbit/s   ✓ 435 TB UP 5d 6h 7m ago 99.2%/99.9%/99.9%/99.8% Match 128.52.132.189 FastGuardHSDirRunningStableV2DirValid NA MyFamily United States of America US AS3 Unknown Linux 2y 2mo 3w ago 5d 6h 8m ago 2603:400a:0:9:f816:3eff:fe73:f862
pdos02 (4) 143.95 Mbit/s   ✓ 116 TB UP 5d 4h 29m ago 100.0%/100.0%/100.0%/100.0% Match 128.52.132.189 FastGuardHSDirRunningStableV2DirValid NA MyFamily United States of America US AS3 Unknown Linux 1y 2mo 1w ago 5d 4h 30m ago 2603:400a:0:9:f816:3eff:fe73:f862
pdos01 (4) 93.86 Mbit/s   ✓ 124 TB UP 5d 2h 7m ago 100.0%/100.0%/100.0%/100.0% Match 128.52.132.189 FastGuardHSDirRunningStableV2DirValid NA MyFamily United States of America US AS3 Unknown Linux 1y 2mo 1w ago 5d 2h 8m ago 2603:400a:0:9:f816:3eff:fe73:f862
pdos00 (4) 90.93 Mbit/s   ✓ 355 TB UP 5d 8h 4m ago 99.3%/99.9%/99.9%/99.9% Match 128.52.132.189 FastGuardHSDirRunningStableV2DirValid NA MyFamily United States of America US AS3 Unknown Linux 2y 2mo 3w ago 5d 8h 5m ago 2603:400a:0:9:f816:3eff:fe73:f862