diff --git a/api/bases/baremetal.openstack.org_openstackbaremetalsets.yaml b/api/bases/baremetal.openstack.org_openstackbaremetalsets.yaml
index 898651a..49de6da 100644
--- a/api/bases/baremetal.openstack.org_openstackbaremetalsets.yaml
+++ b/api/bases/baremetal.openstack.org_openstackbaremetalsets.yaml
@@ -138,10 +138,6 @@ spec:
                 description: CtlplaneInterface - Interface on the provisioned nodes
                   to use for ctlplane network
                 type: string
-              ctlplaneNetmask:
-                description: 'CtlplaneNetmask - Netmask to use for ctlplane network
-                  (TODO: acquire this is another manner?)'
-                type: string
               deploymentSSHSecret:
                 description: DeploymentSSHSecret - Name of secret holding the cloud-admin
                   ssh keys
diff --git a/config/crd/bases/baremetal.openstack.org_openstackbaremetalsets.yaml b/config/crd/bases/baremetal.openstack.org_openstackbaremetalsets.yaml
index 898651a..49de6da 100644
--- a/config/crd/bases/baremetal.openstack.org_openstackbaremetalsets.yaml
+++ b/config/crd/bases/baremetal.openstack.org_openstackbaremetalsets.yaml
@@ -138,10 +138,6 @@ spec:
                 description: CtlplaneInterface - Interface on the provisioned nodes
                   to use for ctlplane network
                 type: string
-              ctlplaneNetmask:
-                description: 'CtlplaneNetmask - Netmask to use for ctlplane network
-                  (TODO: acquire this is another manner?)'
-                type: string
               deploymentSSHSecret:
                 description: DeploymentSSHSecret - Name of secret holding the cloud-admin
                   ssh keys
diff --git a/pkg/openstackbaremetalset/baremetalhost.go b/pkg/openstackbaremetalset/baremetalhost.go
index 1d4077d..7e1b1e6 100644
--- a/pkg/openstackbaremetalset/baremetalhost.go
+++ b/pkg/openstackbaremetalset/baremetalhost.go
@@ -97,24 +97,9 @@ func BaremetalHostProvision(
 	if networkDataSecret == nil {
 
 		// Check IP version and set template variables accordingly
-		ipAddr, ipNet, err := net.ParseCIDR(ctlPlaneIP)
+		ipAddr, _, err := net.ParseCIDR(ctlPlaneIP)
 		if err != nil {
-			// TODO: Remove this conversion once all usage sets ctlPlaneIP in CIDR format.
-			ipAddr = net.ParseIP(ctlPlaneIP)
-			if ipAddr == nil {
-				return err
-			}
-
-			var ipPrefix int
-			if ipAddr.To4() != nil {
-				ipPrefix, _ = net.IPMask(net.ParseIP(instance.Spec.CtlplaneNetmask).To4()).Size()
-			} else {
-				ipPrefix, _ = net.IPMask(net.ParseIP(instance.Spec.CtlplaneNetmask).To16()).Size()
-			}
-			_, ipNet, err = net.ParseCIDR(fmt.Sprintf("%s/%d", ipAddr, ipPrefix))
-			if err != nil {
-				return err
-			}
+			return err
 		}
 
 		CtlplaneIPVersion := "ipv6"
@@ -127,7 +112,6 @@ func BaremetalHostProvision(
 		templateParameters["CtlplaneIp"] = ipAddr
 		templateParameters["CtlplaneInterface"] = instance.Spec.CtlplaneInterface
 		templateParameters["CtlplaneGateway"] = instance.Spec.CtlplaneGateway
-		templateParameters["CtlplaneNetmask"] = net.IP(ipNet.Mask)
 		if len(instance.Spec.BootstrapDNS) > 0 {
 			templateParameters["CtlplaneDns"] = instance.Spec.BootstrapDNS
 		} else {
diff --git a/templates/openstackbaremetalset/cloudinit/networkdata b/templates/openstackbaremetalset/cloudinit/networkdata
index 750381a..e097a6e 100644
--- a/templates/openstackbaremetalset/cloudinit/networkdata
+++ b/templates/openstackbaremetalset/cloudinit/networkdata
@@ -7,7 +7,6 @@ networks:
   id: {{ .CtlplaneInterface }}
   type: {{ .CtlplaneIpVersion }}
   ip_address: {{ .CtlplaneIp }}
-  netmask: "{{ .CtlplaneNetmask }}"
 {{- if (index . "CtlplaneGateway") }}
   routes:
   - network: {{ if eq .CtlplaneIpVersion "ipv6" }}"::"{{ else }}0.0.0.0{{ end }}