@@ -75,13 +75,29 @@ return CNAME(source, target)
   })
 }
 
-var nameserversHE = [
-  NAMESERVER('ns1.he.net.'),
-  NAMESERVER('ns2.he.net.'),
-  NAMESERVER('ns3.he.net.'),
-  NAMESERVER('ns4.he.net.'),
-  NAMESERVER('ns5.he.net.'),
-]
+/**
+ * @param {string} subdomain
+ * @param {string[]} targets
+ */
+function delegate(subdomain, targets) {
+  return targets.map(function (target) {
+    return NS(subdomain, target)
+  })
+}
+
+var heHosts = [
+  "ns1",
+  "ns2",
+  "ns3",
+  "ns4",
+  "ns5"
+].map(function (hostname) {
+  return hostname + '.he.net.'
+})
+
+var nameserversHE = heHosts.map(function (hostname) {
+  return NAMESERVER(hostname)
+})
 
 var acmeLetsEncrypt = [
   CAA_BUILDER({