Archipelago Monitor Statistics

Archipelago (Ark): CAIDA's active measurement infrastructure serving the network research community since 2007.
Statistical information for the topology traces taken by this individual Ark monitor is displayed below. See the main statistics page for the full list of monitors

---

Prev monitor: ham-de
Prev in FI: hel3-fi
Prev in Europe: ham-de

Next monitor: hel3-fi
Next in FI: hel3-fi
Next in Europe: hel3-fi

To main statistics page

hel-fi

Helsinki Univ of Technology
Espoo, FI (2)
IPv4 data used (switch to IPv6)

Time range	2025-05-15 05:38 to 10:29 UTC (5 hours) (1 day ago)
Total traces	49500
Traces with responding destinations	5743 (11.602%)
ASes with responding destinations	1102 (17.663% out of 6239)
Prefixes with responding destinations	3914 (14.915% out of 26242)
Protocol version	v4 (switch to v6)

Generated for cycle 12910 on 2025-05-16 10:44 UTC

All images can be clicked on for more detailed information.

Median RTT per country and US state

Mapping RTT by political boundaries can reveal where high latency issues are located.

• Median RTT per country and US state

Path Dispersion

The paths taken by different traces show where the majority of a monitor's traffic travels.

• AS Path Dispersion (by AS Hop)
  
  AS connectivity near monitor
  
• AS Path Dispersion (by IP Hop)
  
  AS connectivity near monitor (with IP hop distances preserved)
  
• IP Path Dispersion (by IP Hop)
  
  IP connectivity near monitor
  

Path Length Distributions

Path length distributions show, on aggregate, how well-connected a monitor is to the rest of the Internet.

• CCDF of IP path lengths for responding destinations

  percentile	10th	25th	50th	75th	90th	Max
  IP path length	10	12	14	17	20	37

  
• CCDF of AS path lengths for responding destinations

  percentile	10th	25th	50th	75th	90th	Max
  AS path length	4	4	5	6	6	10

  
• CCDF of IP path lengths for non-responding destinations

  percentile	10th	25th	50th	75th	90th	Max
  IP path length	6	8	10	14	17	38

  
• CCDF of AS path lengths for non-responding destinations

  percentile	10th	25th	50th	75th	90th	Max
  AS path length	3	3	4	5	6	12

  

RTT Distribution

An RTT distribution shows the general latency between a monitor and the rest of the Internet.

• CCDF of destination RTTs

  percentile	10th	25th	50th	75th	90th
  RTT (ms)	38.727	65.281	152.369	226.590	291.042

  
• RTT quartiles vs hop distance
  

RTTs vs. Distance

Comparing RTT with geographical distance helps show if latency is primarily due to distance or other factors.

• RTT density versus geographical distance
  
• RTT quartiles versus geographical distance