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

lis-pt

Digi Communications
Forte da Casa, PT (2)
IPv6 data used (switch to IPv4)

Time range	2026-05-22 20:25 to 2026-05-24 16:25 UTC (1 day 20 hours) (2 days ago)
Total traces	502764
Traces with responding destinations	50466 (10.038%)
ASes with responding destinations	12690 (34.889% out of 36372)
Prefixes with responding destinations	44157 (18.221% out of 242337)
Protocol version	v6 (switch to v4)

Generated for cycle 20260522 on 2026-05-25 10:19 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	11	14	17	19	38

CCDF of AS path lengths for responding destinations


percentile	10th	25th	50th	75th	90th	Max
AS path length	3	4	4	5	6	13

CCDF of IP path lengths for non-responding destinations

percentile 10th 25th 50th 75th 90th Max

IP path length 8 11 13 16 18 83
CCDF of AS path lengths for non-responding destinations

percentile 10th 25th 50th 75th 90th Max

AS path length 2 3 4 5 6 14

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) 42.718 68.349 140.704 205.488 264.248
RTT quartiles vs hop distance


percentile	10th	25th	50th	75th	90th
RTT (ms)	42.718	68.349	140.704	205.488	264.248

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