diff --git a/etc/db.ocf b/etc/db.ocf
index 7430c81..d722e4b 100644
--- a/etc/db.ocf
+++ b/etc/db.ocf
@@ -10,7 +10,7 @@
 
 ; ns.ocf is master server and hostmaster@ocf is technical contact
 @ IN SOA ns.ocf.berkeley.edu. hostmaster.ocf.berkeley.edu. (
-2026052600 ; serial number
+2026070300 ; serial number
                          1d         ; slave refresh schedule interval
                          30m        ; slave retry on failure interval
                          4w         ; slave expiration of zone data
@@ -915,10 +915,10 @@ p	IN CNAME	tule
 _acme-challenge.printhost	IN CNAME	_acme-challenge.printhost.letsencrypt.ocf.io.
 printhost	IN CNAME	tule
 
-; trenderhoof (server)
-_acme-challenge.trenderhoof	IN CNAME	_acme-challenge.trenderhoof.letsencrypt.ocf.io.
-trenderhoof	IN A	169.229.226.128
-trenderhoof	IN AAAA	2607:f140:8801::1:128
+; kobudai (server)
+_acme-challenge.kobudai	IN CNAME	_acme-challenge.kobudai.letsencrypt.ocf.io.
+kobudai	IN A	169.229.226.128
+kobudai	IN AAAA	2607:f140:8801::1:128
 
 ; koi (server)
 _acme-challenge.koi	IN CNAME	_acme-challenge.koi.letsencrypt.ocf.io.
diff --git a/etc/serial b/etc/serial
index 42e319e..3f35a5a 100644
--- a/etc/serial
+++ b/etc/serial
@@ -1 +1 @@
-2026052600
+2026070300
diff --git a/etc/zones/db.0.0.0.0.1.0.8.8.0.4.1.f.7.0.6.2.ip6.arpa b/etc/zones/db.0.0.0.0.1.0.8.8.0.4.1.f.7.0.6.2.ip6.arpa
index fa73355..2174972 100644
--- a/etc/zones/db.0.0.0.0.1.0.8.8.0.4.1.f.7.0.6.2.ip6.arpa
+++ b/etc/zones/db.0.0.0.0.1.0.8.8.0.4.1.f.7.0.6.2.ip6.arpa
@@ -12,7 +12,7 @@ $ORIGIN 0.0.0.0.1.0.8.8.0.4.1.f.7.0.6.2.ip6.arpa.
 $TTL 1d
 
 @ IN SOA ns.ocf.berkeley.edu. hostmaster.ocf.berkeley.edu. (
-2026052600 ; serial number
+2026070300 ; serial number
                          1d         ; slave refresh schedule interval
                          30m        ; slave retry on failure interval
                          4w         ; slave expiration of zone data
@@ -127,7 +127,7 @@ $ORIGIN 1.0.0.0.0.0.0.0.0.0.0.0
 7.0.1.0 IN PTR fishpaper.ocf.berkeley.edu.
 7.0.1.0 IN PTR lb-107.ocf.berkeley.edu.
 7.2.1.0 IN PTR tule.ocf.berkeley.edu.
-8.2.1.0 IN PTR trenderhoof.ocf.berkeley.edu.
+8.2.1.0 IN PTR kobudai.ocf.berkeley.edu.
 9.2.1.0 IN PTR koi.ocf.berkeley.edu.
 0.3.1.0 IN PTR carp.ocf.berkeley.edu.
 5.3.1.0 IN PTR newton.ocf.berkeley.edu.
diff --git a/etc/zones/db.226.229.169.in-addr.arpa b/etc/zones/db.226.229.169.in-addr.arpa
index b38f9ca..db23991 100644
--- a/etc/zones/db.226.229.169.in-addr.arpa
+++ b/etc/zones/db.226.229.169.in-addr.arpa
@@ -12,7 +12,7 @@ $ORIGIN 226.229.169.in-addr.arpa.
 $TTL 1d
 
 @ IN SOA ns.ocf.berkeley.edu. hostmaster.ocf.berkeley.edu. (
-2026052600 ; serial number
+2026070300 ; serial number
                          1d         ; slave refresh schedule interval
                          30m        ; slave retry on failure interval
                          4w         ; slave expiration of zone data
@@ -137,7 +137,7 @@ $TTL 1d
 107 IN PTR fishpaper.OCF.Berkeley.EDU.
 107 IN PTR lb-107.OCF.Berkeley.EDU.
 127 IN PTR tule.OCF.Berkeley.EDU.
-128 IN PTR trenderhoof.OCF.Berkeley.EDU.
+128 IN PTR kobudai.OCF.Berkeley.EDU.
 129 IN PTR koi.OCF.Berkeley.EDU.
 130 IN PTR carp.OCF.Berkeley.EDU.
 132 IN PTR y2k-mgmt.OCF.Berkeley.EDU.