diff --git a/homeassistant/components/fritzbox_callmonitor/__init__.py b/homeassistant/components/fritzbox_callmonitor/__init__.py
index bd6b6ab125f..061017f420c 100644
--- a/homeassistant/components/fritzbox_callmonitor/__init__.py
+++ b/homeassistant/components/fritzbox_callmonitor/__init__.py
@@ -11,19 +11,16 @@ from homeassistant.core import HomeAssistant
 from homeassistant.exceptions import ConfigEntryNotReady
 
 from .base import FritzBoxPhonebook
-from .const import (
-    CONF_PHONEBOOK,
-    CONF_PREFIXES,
-    DOMAIN,
-    FRITZBOX_PHONEBOOK,
-    PLATFORMS,
-    UNDO_UPDATE_LISTENER,
-)
+from .const import CONF_PHONEBOOK, CONF_PREFIXES, PLATFORMS
 
 _LOGGER = logging.getLogger(__name__)
 
+FritzBoxCallMonitorConfigEntry = ConfigEntry[FritzBoxPhonebook]
 
-async def async_setup_entry(hass: HomeAssistant, config_entry: ConfigEntry) -> bool:
+
+async def async_setup_entry(
+    hass: HomeAssistant, config_entry: FritzBoxCallMonitorConfigEntry
+) -> bool:
     """Set up the fritzbox_callmonitor platforms."""
     fritzbox_phonebook = FritzBoxPhonebook(
         host=config_entry.data[CONF_HOST],
@@ -51,34 +48,22 @@ async def async_setup_entry(hass: HomeAssistant, config_entry: ConfigEntry) -> b
         _LOGGER.error("Unable to connect to AVM FRITZ!Box call monitor: %s", ex)
         raise ConfigEntryNotReady from ex
 
-    undo_listener = config_entry.add_update_listener(update_listener)
-
-    hass.data.setdefault(DOMAIN, {})
-    hass.data[DOMAIN][config_entry.entry_id] = {
-        FRITZBOX_PHONEBOOK: fritzbox_phonebook,
-        UNDO_UPDATE_LISTENER: undo_listener,
-    }
-
+    config_entry.runtime_data = fritzbox_phonebook
+    config_entry.async_on_unload(config_entry.add_update_listener(update_listener))
     await hass.config_entries.async_forward_entry_setups(config_entry, PLATFORMS)
 
     return True
 
 
-async def async_unload_entry(hass: HomeAssistant, config_entry: ConfigEntry) -> bool:
+async def async_unload_entry(
+    hass: HomeAssistant, config_entry: FritzBoxCallMonitorConfigEntry
+) -> bool:
     """Unloading the fritzbox_callmonitor platforms."""
-
-    unload_ok = await hass.config_entries.async_unload_platforms(
-        config_entry, PLATFORMS
-    )
-
-    hass.data[DOMAIN][config_entry.entry_id][UNDO_UPDATE_LISTENER]()
-
-    if unload_ok:
-        hass.data[DOMAIN].pop(config_entry.entry_id)
-
-    return unload_ok
+    return await hass.config_entries.async_unload_platforms(config_entry, PLATFORMS)
 
 
-async def update_listener(hass: HomeAssistant, config_entry: ConfigEntry) -> None:
+async def update_listener(
+    hass: HomeAssistant, config_entry: FritzBoxCallMonitorConfigEntry
+) -> None:
     """Update listener to reload after option has changed."""
     await hass.config_entries.async_reload(config_entry.entry_id)
diff --git a/homeassistant/components/fritzbox_callmonitor/const.py b/homeassistant/components/fritzbox_callmonitor/const.py
index 406a1dd6d64..60618817318 100644
--- a/homeassistant/components/fritzbox_callmonitor/const.py
+++ b/homeassistant/components/fritzbox_callmonitor/const.py
@@ -38,5 +38,3 @@ DOMAIN: Final = "fritzbox_callmonitor"
 MANUFACTURER: Final = "AVM"
 
 PLATFORMS = [Platform.SENSOR]
-UNDO_UPDATE_LISTENER: Final = "undo_update_listener"
-FRITZBOX_PHONEBOOK: Final = "fritzbox_phonebook"
diff --git a/homeassistant/components/fritzbox_callmonitor/sensor.py b/homeassistant/components/fritzbox_callmonitor/sensor.py
index 0a127ec36b3..9cd37411698 100644
--- a/homeassistant/components/fritzbox_callmonitor/sensor.py
+++ b/homeassistant/components/fritzbox_callmonitor/sensor.py
@@ -14,19 +14,18 @@ from typing import Any, cast
 from fritzconnection.core.fritzmonitor import FritzMonitor
 
 from homeassistant.components.sensor import SensorDeviceClass, SensorEntity
-from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import CONF_HOST, CONF_PORT, EVENT_HOMEASSISTANT_STOP
 from homeassistant.core import Event, HomeAssistant
 from homeassistant.helpers.device_registry import DeviceInfo
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 
+from . import FritzBoxCallMonitorConfigEntry
 from .base import FritzBoxPhonebook
 from .const import (
     ATTR_PREFIXES,
     CONF_PHONEBOOK,
     CONF_PREFIXES,
     DOMAIN,
-    FRITZBOX_PHONEBOOK,
     MANUFACTURER,
     SERIAL_NUMBER,
     FritzState,
@@ -48,13 +47,11 @@ class CallState(StrEnum):
 
 async def async_setup_entry(
     hass: HomeAssistant,
-    config_entry: ConfigEntry,
+    config_entry: FritzBoxCallMonitorConfigEntry,
     async_add_entities: AddEntitiesCallback,
 ) -> None:
     """Set up the fritzbox_callmonitor sensor from config_entry."""
-    fritzbox_phonebook: FritzBoxPhonebook = hass.data[DOMAIN][config_entry.entry_id][
-        FRITZBOX_PHONEBOOK
-    ]
+    fritzbox_phonebook = config_entry.runtime_data
 
     phonebook_id: int = config_entry.data[CONF_PHONEBOOK]
     prefixes: list[str] | None = config_entry.options.get(CONF_PREFIXES)