I realized this morning that I hadn't been seeing timeouts anymore, so I checked: I see that the offending server is no longer in the list of IP from the nameserver. Thank the gods for getting that sorted out.

$ dig perlmonks.org @ns1.us.bitnames.com

; <<>> DiG 9.11.4-P2-RedHat-9.11.4-26.P2.el7_9.9 <<>> perlmonks.org @n
+s1.us.bitnames.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 27062
;; flags: qr aa rd; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
;; QUESTION SECTION:
;perlmonks.org.                 IN      A

;; ANSWER SECTION:
perlmonks.org.          7200    IN      A       216.92.34.251
perlmonks.org.          7200    IN      A       66.39.54.27

;; Query time: 21 msec
;; SERVER: 178.128.191.122#53(178.128.191.122)
;; WHEN: Mon Jan 29 07:12:41 MST 2024
;; MSG SIZE  rcvd: 74
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