Portland OR Monitor Failure DNS Resolutoin failed for host

We have received about 13 monitor failures, CHECK FAILED
NetworkError: DNS resolution failed for host: - 7
Thirteen occured today from approx 8 AM to 1:50 PM Pacific time, each lasting a minute or less. At the same timestamp other monitors succeed.

I’ve seen from other posts NR support indicates there is probably an issue in the network between the monitor and host. Does NR maintain a monitor status page for reference in these situations? Any recommendations as to how to further investigate?

I’ve seen this was also reported back in 11/19 for Portland. Monitoring location issues in Portland, OR, USA? (lots of uptime check failure false positives)
Thanks.