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

NOS
Abrantes, PT (2)

Time range	2025-04-28 01:34 to 06:44 UTC (5 hours) (1 day ago)
Total traces	10500
Traces with responding destinations	437 (4.162%)
ASes with responding destinations	205 (8.890% out of 2306)
Prefixes with responding destinations	389 (5.210% out of 7467)
Protocol version	v4

Generated for cycle 12825 on 2025-04-29 10:58 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	11	13	16	18	21	30

CCDF of AS path lengths for responding destinations


percentile	10th	25th	50th	75th	90th	Max
AS path length	2	4	4	4	6	8

CCDF of IP path lengths for non-responding destinations

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

IP path length 2 4 8 11 14 32
CCDF of AS path lengths for non-responding destinations

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

AS path length 1 1 2 2 4 8

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) 41.896 71.565 126.720 178.647 271.037
RTT quartiles vs hop distance


percentile	10th	25th	50th	75th	90th
RTT (ms)	41.896	71.565	126.720	178.647	271.037

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