probe-sin.a1noc.com
A monitoring probe of a1noc in Singapore, Singapore.
What this server does. It runs uptime and network checks that a1noc customers set up for their own websites, servers and domains: ping, TCP and UDP port checks, HTTP(S), DNS, TLS certificates, mail servers, traceroute and similar.
If you see it in your logs, someone who runs a service on your network or domain is most likely monitoring it with a1noc. Checks run at a fixed, low rate (typically once a minute or less). They are never load tests, port scans of whole networks or exploit attempts, and private or reserved addresses are always refused.
This probe
| Name | probe-sin.a1noc.com |
|---|---|
| IPv4 | 51.79.220.26 |
| IPv6 | 2402:1f00:8000:800::1b62 |
| Location | Singapore, Singapore |
| Hosted at | OVHcloud |
| Reverse DNS | Both addresses resolve back to probe-sin.a1noc.com. |
All a1noc probes
Traffic from any of these addresses is a1noc monitoring. You can allow-list or block them as a group.
| Probe | Location | IPv4 | IPv6 |
|---|---|---|---|
| probe-fra.a1noc.com | Frankfurt, Germany | 54.38.159.123 | 2001:41d0:701:1100::874a |
| probe-sin.a1noc.com | Singapore, Singapore | 51.79.220.26 | 2402:1f00:8000:800::1b62 |
| probe-yul.a1noc.com | Montréal (Beauharnois), Canada | 148.113.254.164 | 2607:5300:205:200::c387 |
Report abuse or ask us to stop
If you think a check from this probe is unwanted, too frequent or harmful, write to:
Please include:
- the source address you saw (for example
51.79.220.26), - the time in UTC and the target (IP, host name or URL) that was contacted,
- whether you want the checks against that target stopped.
We read every report, and we stop checks against a target when its owner asks us to.