diff --git a/docs/DEVELOPER.md b/docs/DEVELOPER.md
index d67c561..9092d32 100644
--- a/docs/DEVELOPER.md
+++ b/docs/DEVELOPER.md
@@ -119,7 +119,7 @@ Update the webservers with the HTML with new versions:
 ```bash
 ssh nono.io curl -L -o /www/sslip.io/document_root/index.html https://raw.githubusercontent.com/cunnie/sslip.io/main/k8s/document_root_sslip.io/index.html
 ssh nono.io curl -L -o /www/nip.io/document_root/index.html https://raw.githubusercontent.com/cunnie/sslip.io/main/k8s/document_root_nip.io/index.html
-for HOST in {blocked,ns-do-sg,ns-gce,ns-hetzner,ns-ovh,ns-ovh-sg}.sslip.io; do
+for HOST in {blocked,ns-do-sg,ns-gce,ns-hetzner,ns-ovh}.sslip.io; do
   ssh $HOST curl -L -o /var/nginx/sslip.io/index.html https://raw.githubusercontent.com/cunnie/sslip.io/main/k8s/document_root_sslip.io/index.html
 done
 ```
diff --git a/main.go b/main.go
index 1762c3f..7435912 100644
--- a/main.go
+++ b/main.go
@@ -42,8 +42,6 @@ func main() {
 			"ns-hetzner.sslip.io=2a01:4ff:1f0:c920::,"+
 			"ns-ovh.sslip.io=51.75.53.19,"+
 			"ns-ovh.sslip.io=2001:41d0:602:2313::1,"+
-			"ns-ovh-sg.sslip.io=51.79.178.89,"+
-			"ns-ovh-sg.sslip.io=2402:1f00:8001:d59::1"+
 			"ns1.nip.io=51.75.53.19,"+
 			"ns1.nip.io=2001:41d0:602:2313::1,"+
 			"ns2.nip.io=5.78.115.44,"+
diff --git a/xip/xip_test.go b/xip/xip_test.go
index 22b45d9..2cfa0b0 100644
--- a/xip/xip_test.go
+++ b/xip/xip_test.go
@@ -79,14 +79,14 @@ var _ = Describe("Xip", func() {
 
 	Describe("NSResources()", func() {
 		When("we use the default nameservers", func() {
-			var x, _ = xip.NewXip("file:///", []string{"ns-hetzner.sslip.io.", "ns-ovh.sslip.io.", "ns-ovh-sg.sslip.io."}, []string{}, []string{})
+			var x, _ = xip.NewXip("file:///", []string{"ns-hetzner.sslip.io.", "ns-ovh.sslip.io.", "ns-do-sg.sslip.io."}, []string{}, []string{})
 			It("returns the name servers", func() {
 				randomDomain := testhelper.Random8ByteString() + ".com."
 				ns := x.NSResources(randomDomain)
 				Expect(len(ns)).To(Equal(3))
 				Expect(ns[0].NS.String()).To(Equal("ns-hetzner.sslip.io."))
 				Expect(ns[1].NS.String()).To(Equal("ns-ovh.sslip.io."))
-				Expect(ns[2].NS.String()).To(Equal("ns-ovh-sg.sslip.io."))
+				Expect(ns[2].NS.String()).To(Equal("ns-do-sg.sslip.io."))
 			})
 			When(`the domain name contains "_acme-challenge."`, func() {
 				When("the domain name has an embedded IP", func() {
@@ -112,13 +112,13 @@ var _ = Describe("Xip", func() {
 			When("we delegate domains to other nameservers", func() {
 				When(`we don't use the "=" in the arguments`, func() {
 					It("returns an informative log message", func() {
-						var _, logs = xip.NewXip("file://etc/blocklist-test.txt", []string{"ns-hetzner.sslip.io.", "ns-ovh.sslip.io.", "ns-ovh-sg.sslip.io."}, []string{}, []string{"noEquals"})
+						var _, logs = xip.NewXip("file://etc/blocklist-test.txt", []string{"ns-hetzner.sslip.io.", "ns-ovh.sslip.io.", "ns-do-sg.sslip.io."}, []string{}, []string{"noEquals"})
 						Expect(strings.Join(logs, "")).To(MatchRegexp(`"-delegates: arguments should be in the format "delegatedDomain=nameserver", not "noEquals"`))
 					})
 				})
 				When(`there's no "." at the end of the delegated domain or nameserver`, func() {
 					It(`helpfully adds the "."`, func() {
-						var x, logs = xip.NewXip("file://etc/blocklist-test.txt", []string{"ns-hetzner.sslip.io.", "ns-ovh.sslip.io.", "ns-ovh-sg.sslip.io."}, []string{}, []string{"a=b"})
+						var x, logs = xip.NewXip("file://etc/blocklist-test.txt", []string{"ns-hetzner.sslip.io.", "ns-ovh.sslip.io.", "ns-do-sg.sslip.io."}, []string{}, []string{"a=b"})
 						Expect(strings.Join(logs, "")).To(MatchRegexp(`Adding delegated NS record "a\.=b\."`))
 						ns := x.NSResources("a.")
 						Expect(len(ns)).To(Equal(1))