b.root-servers.net renumbered on 2023-11-27:
https://b.root-servers.org/news/2023/05/16/new-addresses.html

OK?

diff --git dighost.c dighost.c
index c62ee08573e..4ae82aed902 100644
--- dighost.c
+++ dighost.c
@@ -116,8 +116,8 @@ static const struct {
 } root_hints[] = {
 	{ "198.41.0.4", AF_INET },		/*  a.root-servers.net  */
 	{ "2001:503:ba3e::2:30", AF_INET6 },	/*  a.root-servers.net  */
-	{ "199.9.14.201", AF_INET },		/*  b.root-servers.net  */
-	{ "2001:500:200::b", AF_INET6 },	/*  b.root-servers.net  */
+	{ "170.247.170.2", AF_INET },		/*  b.root-servers.net  */
+	{ "2801:1b8:10::b", AF_INET6 },		/*  b.root-servers.net  */
 	{ "192.33.4.12", AF_INET },		/*  c.root-servers.net  */
 	{ "2001:500:2::c", AF_INET6 },		/*  c.root-servers.net  */
 	{ "199.7.91.13", AF_INET },		/*  d.root-servers.net  */

-- 
In my defence, I have been left unsupervised.