diff --git a/scripts/generate-zone.py b/scripts/generate-zone.py
index a8c5387..f93ffb3 100644
--- a/scripts/generate-zone.py
+++ b/scripts/generate-zone.py
@@ -5,9 +5,11 @@ import datetime
 from collections import defaultdict
 from typing import DefaultDict, Any
 
-serial = datetime.datetime.now().strftime("%Y%M%d%h")
+serial = datetime.datetime.now().strftime("%Y%M%d%H")
 
-HEADER = f"""@ 3600 IN SOA r. root.r. {serial} 7200 3600 86400 3600
+
+def zone_header(domain: str) -> str:
+    return f"""@ 3600 IN SOA {domain}. root.r. {serial} 7200 3600 86400 3600
 @ 3600 IN NS ns1
 ns1 IN A 10.243.29.174
 ns2 IN A 42:0:3c46:70c7:8526:2adf:7451:8bbb
@@ -30,19 +32,19 @@ def main() -> None:
 
     for zone, hosts in dns.items():
         with open(f"{zone}.zone", "w") as f:
-            f.write(HEADER)
+            f.write(zone_header(zone))
             for name, record in hosts.items():
                 for rtype, ip in record.items():
                     f.write(f"{name} IN {rtype} {ip}\n")
 
     with open("240.10.zone", "w") as f:
-        f.write(HEADER)
+        f.write(zone_header("240.10.in-addr.arpa"))
         for ip, name in rdns.items():
             if "." in ip and ip.startswith("10.2"):
                 f.write(f"{ip}. IN PTR {name}.\n")
 
     with open("42.zone", "w") as f:
-        f.write(HEADER)
+        f.write(zone_header("2.4.ip6.arpa"))
         for ip, name in rdns.items():
             if ":" in ip and ip.startswith("42:"):
                 f.write(f"{ip}. IN PTR {name}.\n")
diff --git a/zones/240.10.zone b/zones/240.10.zone
index a4bc380..91e93c9 100644
--- a/zones/240.10.zone
+++ b/zones/240.10.zone
@@ -1,4 +1,4 @@
-@ 3600 IN SOA r. root.r. 20204812Aug 7200 3600 86400 3600
+@ 3600 IN SOA 240.10.in-addr.arpa. root.r. 2020081218 7200 3600 86400 3600
 @ 3600 IN NS ns1
 ns1 IN A 10.243.29.174
 ns2 IN A 42:0:3c46:70c7:8526:2adf:7451:8bbb
diff --git a/zones/42.zone b/zones/42.zone
index 32b1c4d..7c7c607 100644
--- a/zones/42.zone
+++ b/zones/42.zone
@@ -1,4 +1,4 @@
-@ 3600 IN SOA r. root.r. 20204812Aug 7200 3600 86400 3600
+@ 3600 IN SOA 2.4.ip6.arpa. root.r. 2020081218 7200 3600 86400 3600
 @ 3600 IN NS ns1
 ns1 IN A 10.243.29.174
 ns2 IN A 42:0:3c46:70c7:8526:2adf:7451:8bbb
diff --git a/zones/gg23.zone b/zones/gg23.zone
index c2212c6..f04c5a4 100644
--- a/zones/gg23.zone
+++ b/zones/gg23.zone
@@ -1,4 +1,4 @@
-@ 3600 IN SOA r. root.r. 20204812Aug 7200 3600 86400 3600
+@ 3600 IN SOA gg23. root.r. 2020081218 7200 3600 86400 3600
 @ 3600 IN NS ns1
 ns1 IN A 10.243.29.174
 ns2 IN A 42:0:3c46:70c7:8526:2adf:7451:8bbb
diff --git a/zones/i.zone b/zones/i.zone
index 3176436..9b42636 100644
--- a/zones/i.zone
+++ b/zones/i.zone
@@ -1,4 +1,4 @@
-@ 3600 IN SOA r. root.r. 20204812Aug 7200 3600 86400 3600
+@ 3600 IN SOA i. root.r. 2020081218 7200 3600 86400 3600
 @ 3600 IN NS ns1
 ns1 IN A 10.243.29.174
 ns2 IN A 42:0:3c46:70c7:8526:2adf:7451:8bbb
diff --git a/zones/lan.zone b/zones/lan.zone
index ecf1e58..beda25a 100644
--- a/zones/lan.zone
+++ b/zones/lan.zone
@@ -1,4 +1,4 @@
-@ 3600 IN SOA r. root.r. 20204812Aug 7200 3600 86400 3600
+@ 3600 IN SOA lan. root.r. 2020081218 7200 3600 86400 3600
 @ 3600 IN NS ns1
 ns1 IN A 10.243.29.174
 ns2 IN A 42:0:3c46:70c7:8526:2adf:7451:8bbb
diff --git a/zones/r.zone b/zones/r.zone
index 3ba5a6b..9c76f09 100644
--- a/zones/r.zone
+++ b/zones/r.zone
@@ -1,4 +1,4 @@
-@ 3600 IN SOA r. root.r. 20204812Aug 7200 3600 86400 3600
+@ 3600 IN SOA r. root.r. 2020081218 7200 3600 86400 3600
 @ 3600 IN NS ns1
 ns1 IN A 10.243.29.174
 ns2 IN A 42:0:3c46:70c7:8526:2adf:7451:8bbb
diff --git a/zones/shack.zone b/zones/shack.zone
index e7df38b..d240761 100644
--- a/zones/shack.zone
+++ b/zones/shack.zone
@@ -1,4 +1,4 @@
-@ 3600 IN SOA r. root.r. 20204812Aug 7200 3600 86400 3600
+@ 3600 IN SOA shack. root.r. 2020081218 7200 3600 86400 3600
 @ 3600 IN NS ns1
 ns1 IN A 10.243.29.174
 ns2 IN A 42:0:3c46:70c7:8526:2adf:7451:8bbb
diff --git a/zones/w.zone b/zones/w.zone
index 07445e8..0af546f 100644
--- a/zones/w.zone
+++ b/zones/w.zone
@@ -1,4 +1,4 @@
-@ 3600 IN SOA r. root.r. 20204812Aug 7200 3600 86400 3600
+@ 3600 IN SOA w. root.r. 2020081218 7200 3600 86400 3600
 @ 3600 IN NS ns1
 ns1 IN A 10.243.29.174
 ns2 IN A 42:0:3c46:70c7:8526:2adf:7451:8bbb