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

lhr4-uk

aws
London, UK (11)

Time range	2026-02-15 11:48 to 14:54 UTC (3 hours) (1 day ago)
Total traces	25500
Traces with responding destinations	2942 (11.537%)
ASes with responding destinations	678 (16.766% out of 4044)
Prefixes with responding destinations	2221 (14.199% out of 15642)
Protocol version	v4

Generated for cycle 14323 on 2026-02-16 11:17 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	9	12	17	21	25	32

CCDF of AS path lengths for responding destinations


percentile	10th	25th	50th	75th	90th	Max
AS path length	2	3	4	5	6	10

CCDF of IP path lengths for non-responding destinations

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

IP path length 8 11 14 17 20 34
CCDF of AS path lengths for non-responding destinations

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

AS path length 2 2 3 4 5 10

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) 19.277 42.322 116.058 196.223 259.072
RTT quartiles vs hop distance


percentile	10th	25th	50th	75th	90th
RTT (ms)	19.277	42.322	116.058	196.223	259.072

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