diff --git a/roles/dns-intern/templates/bind/23.172.in-addr.arpa.zone.j2 b/roles/dns-intern/templates/bind/23.172.in-addr.arpa.zone.j2
index db252a1..4dfff95 100644
--- a/roles/dns-intern/templates/bind/23.172.in-addr.arpa.zone.j2
+++ b/roles/dns-intern/templates/bind/23.172.in-addr.arpa.zone.j2
@@ -1,7 +1,7 @@
 $ORIGIN 23.172.in-addr.arpa.	; base for unqualified names
 $TTL 1h				; default time-to-live
 @				IN	SOA ns.binary.kitchen. hostmaster.binary.kitchen. (
-					2018070800; serial
+					2018072201; serial
 					1d; refresh
 					2h; retry
 					4w; expire
@@ -19,6 +19,8 @@ $TTL 1h				; default time-to-live
 41.1				IN	PTR	ap01.binary.kitchen.
 42.1				IN	PTR	ap02.binary.kitchen.
 43.1				IN	PTR	ap03.binary.kitchen.
+44.1				IN	PTR	ap04.binary.kitchen.
+51.1				IN	PTR	modem.binary.kitchen.
 61.1				IN	PTR	kraut.binary.kitchen.
 81.1				IN	PTR	kraut-bmc.binary.kitchen.
 82.1				IN	PTR	bowle-bmc.binary.kitchen.
diff --git a/roles/dns-intern/templates/bind/binary.kitchen.zone.j2 b/roles/dns-intern/templates/bind/binary.kitchen.zone.j2
index cddafa7..9b56d2d 100644
--- a/roles/dns-intern/templates/bind/binary.kitchen.zone.j2
+++ b/roles/dns-intern/templates/bind/binary.kitchen.zone.j2
@@ -1,7 +1,7 @@
 $ORIGIN binary.kitchen		; base for unqualified names
 $TTL 1h				; default time-to-live
 @				IN	SOA ns.binary.kitchen. hostmaster.binary.kitchen. (
-					2018070800; serial
+					2018072201; serial
 					1d; refresh
 					2h; retry
 					4w; expire
@@ -34,6 +34,8 @@ sw02				IN	A	172.23.1.32
 ap01				IN	A	172.23.1.41
 ap02				IN	A	172.23.1.42
 ap03				IN	A	172.23.1.43
+ap04				IN	A	172.23.1.44
+modem				IN	A	172.23.1.51
 kraut				IN	A	172.23.1.61
 kraut-bmc			IN	A	172.23.1.81
 bowle-bmc			IN	A	172.23.1.82