diff --git a/src/data/hassio/network.ts b/src/data/hassio/network.ts
index afe8b920f7d7..51cd6b8e3730 100644
--- a/src/data/hassio/network.ts
+++ b/src/data/hassio/network.ts
@@ -117,11 +117,10 @@ export const accesspointScan = async (
 };
 
 export const parseAddress = (address: string) => {
-  const isIPv6 = address.includes(":");
-  const [ip, cidr] = address.includes("/")
-    ? address.split("/")
-    : [address, isIPv6 ? "64" : "24"];
-  return { ip, mask: cidrToNetmask(cidr, isIPv6) };
+  const [ip, cidr] = address.split("/");
+  const isIPv6 = ip.includes(":");
+  const mask = cidr ? cidrToNetmask(cidr, isIPv6) : null;
+  return { ip, mask };
 };
 
 export const formatAddress = (ip: string, mask: string) =>
diff --git a/src/panels/config/network/supervisor-network.ts b/src/panels/config/network/supervisor-network.ts
index 22b23188c6c9..719244c40881 100644
--- a/src/panels/config/network/supervisor-network.ts
+++ b/src/panels/config/network/supervisor-network.ts
@@ -656,8 +656,10 @@ export class HassioNetwork extends LitElement {
     if (id === "address") {
       const index = (ev.target as any).index as number;
       const { mask } = parseAddress(value);
-      this._interface[version]!.address![index] = formatAddress(value, mask);
-      this.requestUpdate("_interface");
+      if (mask) {
+        this._interface[version]!.address![index] = formatAddress(value, mask);
+        this.requestUpdate("_interface");
+      }
     } else if (id === "netmask") {
       const index = (ev.target as any).index as number;
       const { ip } = parseAddress(this._interface![version]!.address![index]);