diff --git a/MediaBrowser.Common/Net/NetworkUtils.cs b/MediaBrowser.Common/Net/NetworkUtils.cs
index 4110b000e..e482089f0 100644
--- a/MediaBrowser.Common/Net/NetworkUtils.cs
+++ b/MediaBrowser.Common/Net/NetworkUtils.cs
@@ -197,46 +197,29 @@ public static partial class NetworkUtils
     /// <returns><c>True</c> if parsing was successful.</returns>
     public static bool TryParseToSubnet(ReadOnlySpan<char> value, [NotNullWhen(true)] out IPNetwork? result, bool negated = false)
     {
-        var splitString = value.Trim().Split('/');
-        if (splitString.MoveNext())
+        value = value.Trim();
+        if (value.Contains('/'))
         {
-            var ipBlock = splitString.Current;
-            var address = IPAddress.None;
-            if (negated && ipBlock.StartsWith("!") && IPAddress.TryParse(ipBlock[1..], out var tmpAddress))
+            if (negated && value.StartsWith("!") && IPNetwork.TryParse(value[1..], out result))
             {
-                address = tmpAddress;
+                return true;
             }
-            else if (!negated && IPAddress.TryParse(ipBlock, out tmpAddress))
+            else if (!negated && IPNetwork.TryParse(value, out result))
             {
-                address = tmpAddress;
+                return true;
             }
-
-            if (address != IPAddress.None)
+        }
+        else if (IPAddress.TryParse(value, out var address))
+        {
+            if (address.AddressFamily == AddressFamily.InterNetwork)
             {
-                if (splitString.MoveNext())
-                {
-                    var subnetBlock = splitString.Current;
-                    if (int.TryParse(subnetBlock, out var netmask))
-                    {
-                        result = new IPNetwork(address, netmask);
-                        return true;
-                    }
-                    else if (IPAddress.TryParse(subnetBlock, out var netmaskAddress))
-                    {
-                        result = new IPNetwork(address, NetworkUtils.MaskToCidr(netmaskAddress));
-                        return true;
-                    }
-                }
-                else if (address.AddressFamily == AddressFamily.InterNetwork)
-                {
-                    result = address.Equals(IPAddress.Any) ? NetworkConstants.IPv4Any : new IPNetwork(address, NetworkConstants.MinimumIPv4PrefixSize);
-                    return true;
-                }
-                else if (address.AddressFamily == AddressFamily.InterNetworkV6)
-                {
-                    result = address.Equals(IPAddress.IPv6Any) ? NetworkConstants.IPv6Any : new IPNetwork(address, NetworkConstants.MinimumIPv6PrefixSize);
-                    return true;
-                }
+                result = address.Equals(IPAddress.Any) ? NetworkConstants.IPv4Any : new IPNetwork(address, NetworkConstants.MinimumIPv4PrefixSize);
+                return true;
+            }
+            else if (address.AddressFamily == AddressFamily.InterNetworkV6)
+            {
+                result = address.Equals(IPAddress.IPv6Any) ? NetworkConstants.IPv6Any : new IPNetwork(address, NetworkConstants.MinimumIPv6PrefixSize);
+                return true;
             }
         }
 
diff --git a/tests/Jellyfin.Networking.Tests/NetworkParseTests.cs b/tests/Jellyfin.Networking.Tests/NetworkParseTests.cs
index 19aaa5ef8..3b7c43100 100644
--- a/tests/Jellyfin.Networking.Tests/NetworkParseTests.cs
+++ b/tests/Jellyfin.Networking.Tests/NetworkParseTests.cs
@@ -71,7 +71,6 @@ namespace Jellyfin.Networking.Tests
         [InlineData("127.0.0.1/8")]
         [InlineData("192.168.1.2")]
         [InlineData("192.168.1.2/24")]
-        [InlineData("192.168.1.2/255.255.255.0")]
         [InlineData("fd23:184f:2029:0:3139:7386:67d7:d517")]
         [InlineData("[fd23:184f:2029:0:3139:7386:67d7:d517]")]
         [InlineData("fe80::7add:12ff:febb:c67b%16")]
@@ -103,12 +102,10 @@ namespace Jellyfin.Networking.Tests
         [Theory]
         [InlineData("192.168.5.85/24", "192.168.5.1")]
         [InlineData("192.168.5.85/24", "192.168.5.254")]
-        [InlineData("192.168.5.85/255.255.255.0", "192.168.5.254")]
         [InlineData("10.128.240.50/30", "10.128.240.48")]
         [InlineData("10.128.240.50/30", "10.128.240.49")]
         [InlineData("10.128.240.50/30", "10.128.240.50")]
         [InlineData("10.128.240.50/30", "10.128.240.51")]
-        [InlineData("10.128.240.50/255.255.255.252", "10.128.240.51")]
         [InlineData("127.0.0.1/8", "127.0.0.1")]
         public void IPv4SubnetMaskMatchesValidIPAddress(string netMask, string ipAddress)
         {
@@ -124,12 +121,10 @@ namespace Jellyfin.Networking.Tests
         [Theory]
         [InlineData("192.168.5.85/24", "192.168.4.254")]
         [InlineData("192.168.5.85/24", "191.168.5.254")]
-        [InlineData("192.168.5.85/255.255.255.252", "192.168.4.254")]
         [InlineData("10.128.240.50/30", "10.128.240.47")]
         [InlineData("10.128.240.50/30", "10.128.240.52")]
         [InlineData("10.128.240.50/30", "10.128.239.50")]
         [InlineData("10.128.240.50/30", "10.127.240.51")]
-        [InlineData("10.128.240.50/255.255.255.252", "10.127.240.51")]
         public void IPv4SubnetMaskDoesNotMatchInvalidIPAddress(string netMask, string ipAddress)
         {
             var ipa = IPAddress.Parse(ipAddress);