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Built-in Measurements

Whenever a host connects a RIPE Atlas probe, it automatically starts executing a set of pre-defined measurements. In our terminology these are called "built-in measurements". The probe's network capabilities determine if these measurements are scheduled over IPv4, IPv6 or both.

The set of built-in measurements contain ping, traceroute, DNS, SSL/TLS and some HTTP types, mostly towards well-known targets such as DNS root servers, but also towards some of the RIPE Atlas infrastructure components.

This page describes what measurements are scheduled, and how one can access the results of these.

Accessing the Results

The host for a particular probe can access the results of the built-in measurements of their own probe(s) via the Built-in Measurements tab on the probe status page. One can find a Log Downloads section at the bottom of the page.

The same data is also accessible via the "result" section of the measurement REST API as well as the streaming API.

Definitions and ID Space Layout for Built-In Measurements

Every measurement has a measurement ID, which is unique to that measurement in the system. The following table lists the general layout of the measurement ID space. Note that the last two digits, the "offsets", are explained in the next table.

Measurement range Measurement ID Meaning Frequency
1000 - 2999 Ping
10xx IPv4 ping
20xx IPv6 ping
5000 - 6999 Traceroute
50xx IPv4 traceroute
60xx IPv6 traceroute
7000 - 7999 Probe connect/disconnect events
7000 Probe connect/disconnect events N/A
10000 - 11999 DNS SOA and anycast
100xx IPv4 UDP DNS SOA 1800 seconds
101xx IPv4 TCP DNS SOA 1800 seconds
102xx IPv4 UDP DNS version.bind 43200 seconds
103xx IPv4 UDP DNS hostname.bind 240 seconds
104xx IPv4 UDP DNS id.server 1800 seconds
105xx IPv4 UDP DNS version.server 43200 seconds
110xx IPv6 UDP DNS SOA 1800 seconds
111xx IPv6 TCP DNS SOA 1800 seconds
112xx IPv6 UDP DNS version.bind 43200 seconds
113xx IPv6 UDP DNS hostname.bind 240 seconds
114xx IPv6 UDP DNS id.server 1800 seconds
115xx IPv6 UDP DNS version.server 43200 seconds
1M+ User-Defined Measurements

Measurement Offsets

Destination name Measurement Offset Ping (freqency: 240) Traceroute (frequency: 1800) DNS
a.root-servers.net 9 IPv4 + IPv6 IPv4 + IPv6 IPv4 + IPv6
b.root-servers.net 10 IPv4 + IPv6 IPv4 + IPv6 IPv4 + IPv6
c.root-servers.net 11 IPv4 + IPv6 IPv4 + IPv6 IPv4 + IPv6
d.root-servers.net 12 IPv4 + IPv6 IPv4 + IPv6 IPv4 + IPv6
e.root-servers.net 13 IPv4 + IPv6 IPv4 + IPv6 IPv4 + IPv6
f.root-servers.net 4 IPv4 + IPv6 IPv4 + IPv6 IPv4 + IPv6
g.root-servers.net 14 (not responding) IPv4 + IPv6 IPv4 + IPv6
h.root-servers.net 15 IPv4 + IPv6 IPv4 + IPv6 IPv4 + IPv6
i.root-servers.net 5 IPv4 + IPv6 IPv4 + IPv6 IPv4 + IPv6
j.root-servers.net 16 IPv4 + IPv6 IPv4 + IPv6 IPv4 + IPv6
k.root-servers.net 1 IPv4 + IPv6 IPv4 + IPv6 IPv4 + IPv6
l.root-servers.net 8 IPv4 + IPv6 IPv4 + IPv6 IPv4 + IPv6
m.root-servers.net 6 IPv4 + IPv6 IPv4 + IPv6 IPv4 + IPv6
ctr-ams02.atlas.ripe.net 30 IPv4 + IPv6 IPv4 + IPv6
ctr-ams03.atlas.ripe.net 31 IPv4 + IPv6 IPv4 + IPv6
ctr-ewr01.atlas.ripe.net 29 IPv4 + IPv6 IPv4 + IPv6
ctr-fnc01.atlas.ripe.net 28 IPv4 + IPv6 IPv4 + IPv6
ctr-nue13.atlas.ripe.net 17 IPv4 + IPv6 IPv4 + IPv6
ctr-nue17.atlas.ripe.net 19 IPv4 + IPv6 IPv4 + IPv6
ctr-sin02.atlas.ripe.net 27 IPv4 + IPv6 IPv4 + IPv6

Additional Built-In Measurements

Measurement ID Frequency (seconds) Type Target
5051 900 Traceroute (IPv4, ICMP) topology4.dyndns.atlas.ripe.net (multi-target)
5151 900 Traceroute (IPv4, UDP) topology4.dyndns.atlas.ripe.net (multi-target)
6052 900 Traceroute (IPv6, ICMP) topology6.dyndns.atlas.ripe.net (multi-target)
6152 900 Traceroute (IPv6, UDP) topology6.dyndns.atlas.ripe.net (multi-target)
12027 3600 HTTP GET (IPv4) http://ip-echo.ripe.net/
13027 3600 HTTP GET (IPv6) http://ip-echo.ripe.net/
12023 900 HTTP GET (IPv4) http://www.ripe.net/favicon.ico
13023 900 HTTP GET (IPv6) http://www.ripe.net/favicon.ico
14001 43200 SSLCert (IPv4) www.ripe.net
14002 43200 SSLCert (IPv4) atlas.ripe.net
15001 43200 SSLCert (IPv6) www.ripe.net
15002 43200 SSLCert (IPv6) atlas.ripe.net
30001 600 DNS A using probe resolvers Random domains
30002 600 DNS A using probe resolvers Popular domains