diff --git a/src/helpers/hardware_types.ts b/src/helpers/module_properties.ts
similarity index 64%
rename from src/helpers/hardware_types.ts
rename to src/helpers/module_properties.ts
index 195e409..65fb5af 100644
--- a/src/helpers/hardware_types.ts
+++ b/src/helpers/module_properties.ts
@@ -1,3 +1,27 @@
+export interface LcnSerial {
+  year: number;
+  month: number;
+  day: number;
+  serial?: number;
+}
+
+const serialRegExp =
+  /(?<year>[A-F0-9]{2}).(?<month>[A-F0-9])(?<day>[A-F0-9]{2})(?<serial>[A-F0-9]{4})?/;
+
+export function parseSerialNumber(serial_number: number): LcnSerial {
+  const result = serialRegExp.exec(serial_number.toString(16).toUpperCase());
+  if (!result) throw new Error("Wrong serial number");
+
+  const is_software_serial = result![4] === undefined;
+
+  return {
+    year: Number("0x" + result![1]) + 1990,
+    month: Number("0x" + result![2]),
+    day: Number("0x" + result![3]),
+    serial: is_software_serial ? undefined : Number("0x" + result![4]),
+  };
+}
+
 export function getHardwareType(hardwareId: number): string | undefined {
   switch (hardwareId) {
     case 1:
diff --git a/src/lcn-devices-page.ts b/src/lcn-devices-page.ts
index dbc1a1a..0c26a29 100644
--- a/src/lcn-devices-page.ts
+++ b/src/lcn-devices-page.ts
@@ -1,6 +1,7 @@
 import { consume } from "@lit-labs/context";
 import { deviceConfigsContext } from "components/context";
 import { haStyle } from "@ha/resources/styles";
+import "@lrnwebcomponents/simple-tooltip/simple-tooltip";
 import "@material/mwc-button";
 import "@ha/components/ha-clickable-list-item";
 import "@ha/components/ha-fab";
@@ -9,7 +10,6 @@ import "@ha/components/ha-list-item";
 import "@ha/components/ha-md-menu-item";
 import "@ha/components/ha-help-tooltip";
 import "@ha/components/ha-icon-button";
-import "@ha/components/ha-switch";
 import "@ha/components/ha-checkbox";
 import "@ha/components/ha-formfield";
 import { stopPropagation } from "@ha/common/dom/stop_propagation";
@@ -36,7 +36,7 @@ import { navigate } from "@ha/common/navigate";
 import type { HASSDomEvent } from "@ha/common/dom/fire_event";
 import { updateDeviceConfigs, updateEntityConfigs } from "components/events";
 import { renderBrandLogo } from "helpers/brand_logo";
-import { getHardwareType } from "helpers/hardware_types";
+import { getHardwareType, parseSerialNumber, LcnSerial } from "helpers/module_properties";
 import { ProgressDialog } from "./dialogs/progress-dialog";
 import {
   loadLCNCreateDeviceDialog,
@@ -162,16 +162,14 @@ export class LCNConfigDashboard extends LitElement {
         sortable: true,
         filterable: true,
         defaultHidden: true,
-        template: (entry) =>
-          entry.hardware_serial !== -1 ? entry.hardware_serial.toString(16).toUpperCase() : "-",
+        template: (entry) => this.renderHardwareSerial(entry.hardware_serial),
       },
       software_serial: {
         title: this.lcn.localize("software-serial"),
         sortable: true,
         filterable: true,
         defaultHidden: true,
-        template: (entry) =>
-          entry.software_serial !== -1 ? entry.software_serial.toString(16).toUpperCase() : "-",
+        template: (entry) => this.renderSoftwareSerial(entry.software_serial),
       },
       hardware_type: {
         title: this.lcn.localize("hardware-type"),
@@ -213,6 +211,48 @@ export class LCNConfigDashboard extends LitElement {
     this._dataTable.then(renderBrandLogo);
   }
 
+  protected renderSoftwareSerial(software_serial: number) {
+    let serial: LcnSerial;
+    try {
+      serial = parseSerialNumber(software_serial);
+    } catch (error) {
+      return html`-`;
+    }
+
+    return html`
+      ${software_serial.toString(16).toUpperCase()}
+      <simple-tooltip animation-delay="0">
+        ${this.lcn.localize("firmware-date", {
+          year: serial.year,
+          month: serial.month,
+          day: serial.day,
+        })}
+      </simple-tooltip>
+    `;
+  }
+
+  protected renderHardwareSerial(hardware_serial: number) {
+    let serial: LcnSerial;
+    try {
+      serial = parseSerialNumber(hardware_serial);
+    } catch (error) {
+      return html`-`;
+    }
+
+    return html`
+      ${hardware_serial.toString(16).toUpperCase()}
+      <simple-tooltip animation-delay="0">
+        ${this.lcn.localize("hardware-date", {
+          year: serial.year,
+          month: serial.month,
+          day: serial.day,
+        })}
+        <br />
+        ${this.lcn.localize("hardware-number", { serial: serial.serial })}
+      </simple-tooltip>
+    `;
+  }
+
   protected render() {
     if (!(this.hass && this.lcn && this._deviceConfigs)) {
       return nothing;
diff --git a/src/localize/languages/de.json b/src/localize/languages/de.json
index a18349e..0b46140 100644
--- a/src/localize/languages/de.json
+++ b/src/localize/languages/de.json
@@ -23,6 +23,10 @@
   "addresses": "Adressen",
   "modulesgroups": "Module / Gruppen",
 
+  "firmware-date": "Firmware Datum: {day}.{month}.{year}",
+  "hardware-date": "Modul Datum: {day}.{month}.{year}",
+  "hardware-number": "Nummer: {serial}",
+
   "domain": "Domäne",
   "binary-sensor": "Binärsensor",
   "climate": "Klima",
diff --git a/src/localize/languages/en.json b/src/localize/languages/en.json
index 72829a6..5be0afb 100644
--- a/src/localize/languages/en.json
+++ b/src/localize/languages/en.json
@@ -23,6 +23,10 @@
   "addresses": "Addresses",
   "modulesgroups": "Modules / Groups",
 
+  "firmware-date": "Firmware date: {month}/{day}/{year}",
+  "hardware-date": "Module date: {month}/{day}/{year}",
+  "hardware-number": "Module number: {serial}",
+
   "domain": "Domain",
   "binary-sensor": "Binary sensor",
   "climate": "Climate",