Each record is one thing we measured: the host answered our probe — one request, from one vantage point — with a server error on the stated number of consecutive probes. It says nothing about what anyone else sees from anywhere else.

The status is the HTTP status the host answered our newest failing probe of that run with — 503, say. It is that one response to that one request, not a summary of the run, and not the newest probe's status: a host that has since answered normally still shows the status of the last probe that failed. A record that reads "not recorded" was opened before we began keeping it and has not failed again since; that is an absence of a measurement, not a status of zero.

Hosts we could not reach at all are not listed. Their incidents are recorded separately and not published here, because from one vantage point a host nobody can reach and a host refusing our prober look the same, and naming one as the other would be a false claim about a working site. So this list is a floor: it can only under-count.

Not live: an incident opens only after 2 failing probes in a row and the estate is swept in passes days apart, so a record appears here days after the errors begin, and a close appears only when a later probe succeeds.

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