diff --git a/homeassistant/components/shelly/config_flow.py b/homeassistant/components/shelly/config_flow.py
index e3ebcf309a93..9ee8622547dd 100644
--- a/homeassistant/components/shelly/config_flow.py
+++ b/homeassistant/components/shelly/config_flow.py
@@ -69,6 +69,7 @@ from homeassistant.helpers.selector import (
     SelectSelectorMode,
 )
 from homeassistant.helpers.service_info.zeroconf import ZeroconfServiceInfo
+from homeassistant.util.network import is_ip_address
 
 from .ble_provisioning import (
     ProvisioningState,
@@ -96,7 +97,6 @@ from .utils import (
     get_model_name,
     get_rpc_device_wakeup_period,
     get_ws_context,
-    is_hostname,
     mac_address_from_name,
 )
 
@@ -722,7 +722,7 @@ class ShellyConfigFlow(ConfigFlow, domain=DOMAIN):
         current_entry = await self.async_set_unique_id(mac)
         current_host = current_entry.data.get(CONF_HOST) if current_entry else None
         # A user-configured hostname must not be replaced by the resolved IP
-        keep_hostname = current_host is not None and is_hostname(current_host)
+        keep_hostname = current_host is not None and not is_ip_address(current_host)
         if current_entry and (current_host == host or keep_hostname):
             LOGGER.debug("async_reconnect_soon: host: %s, mac: %s", host, mac)
             await async_reconnect_soon(self.hass, current_entry)
diff --git a/homeassistant/components/shelly/utils.py b/homeassistant/components/shelly/utils.py
index 82494b237e63..385c2ab80b04 100644
--- a/homeassistant/components/shelly/utils.py
+++ b/homeassistant/components/shelly/utils.py
@@ -608,15 +608,6 @@ def get_http_port(data: Mapping[str, Any]) -> int:
     return cast(int, data.get(CONF_PORT, DEFAULT_HTTP_PORT))
 
 
-def is_hostname(host: str) -> bool:
-    """Return True if host is a hostname rather than an IP address."""
-    try:
-        ip_address(host)
-    except ValueError:
-        return True
-    return False
-
-
 def get_host(host: str) -> str:
     """Get the device IP address or hostname."""
     try: