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	2026-09-01 16:21 to 2026-09-03 12:59 UTC (1 day 21 hours) (2 days ago)
Total traces	520308
Traces with responding destinations	52477 (10.086%)
ASes with responding destinations	13087 (35.334% out of 37038)
Prefixes with responding destinations	45466 (18.279% out of 248734)
Protocol version	v6 (switch to v4)

Generated for cycle 20260901 on 2026-09-04 10:14 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	19	36

CCDF of AS path lengths for responding destinations


percentile	10th	25th	50th	75th	90th	Max
AS path length	5	6	6	7	8	15

CCDF of IP path lengths for non-responding destinations

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

IP path length 8 11 13 16 19 44
CCDF of AS path lengths for non-responding destinations

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

AS path length 4 5 6 7 8 15

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) 42.609 65.787 137.132 196.873 247.570
RTT quartiles vs hop distance


percentile	10th	25th	50th	75th	90th
RTT (ms)	42.609	65.787	137.132	196.873	247.570

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