diff --git a/CHANGELOG.md b/CHANGELOG.md
index f0e66c9..70354d3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- `FromNumber` and `ToNumber` properties to `CallMonitorEventArgs` to use when available
+
 ### Changed
 
 - Removed support for .NET 6.0 (EOL: 2024-11-12)
diff --git a/src/FritzCallMonitor/EventArgs/CallMonitorEventArgs.cs b/src/FritzCallMonitor/EventArgs/CallMonitorEventArgs.cs
index 946db57..c1f685a 100644
--- a/src/FritzCallMonitor/EventArgs/CallMonitorEventArgs.cs
+++ b/src/FritzCallMonitor/EventArgs/CallMonitorEventArgs.cs
@@ -29,15 +29,47 @@ namespace AMWD.Net.Api.Fritz.CallMonitor
 		public int? LinePort { get; private set; }
 
 		/// <summary>
-		/// Gets the external number displayed in the FRITZ!Box.
+		/// Gets the external phone number displayed in the FRITZ!Box.
 		/// </summary>
 		public string? ExternalNumber { get; private set; }
 
 		/// <summary>
-		/// Gets the internal number registered in the FRITZ!Box.
+		/// Gets the internal phone number (part) registered in the FRITZ!Box.
 		/// </summary>
 		public string? InternalNumber { get; private set; }
 
+		/// <summary>
+		/// Gets the phone number from which the call was initiated.
+		/// </summary>
+		public string? FromNumber
+		{
+			get
+			{
+				return Event switch
+				{
+					EventType.Ring => ExternalNumber,
+					EventType.Call => InternalNumber,
+					_ => null
+				};
+			}
+		}
+
+		/// <summary>
+		/// Gets the phone number to which the call was directed.
+		/// </summary>
+		public string? ToNumber
+		{
+			get
+			{
+				return Event switch
+				{
+					EventType.Ring => InternalNumber,
+					EventType.Call => ExternalNumber,
+					_ => null
+				};
+			}
+		}
+
 		/// <summary>
 		/// Gets the duration of the call (only on <see cref="EventType.Disconnect"/> event).
 		/// </summary>
diff --git a/src/FritzCallMonitor/Utils/ReconnectTcpClient.cs b/src/FritzCallMonitor/Utils/ReconnectTcpClient.cs
index beb6ef2..0a69de6 100644
--- a/src/FritzCallMonitor/Utils/ReconnectTcpClient.cs
+++ b/src/FritzCallMonitor/Utils/ReconnectTcpClient.cs
@@ -158,7 +158,7 @@ namespace AMWD.Net.Api.Fritz.CallMonitor.Utils
 						if (delay > 60 * 1000)
 							delay = 60 * 1000;
 
-						Logger?.LogWarning(ex, $"Failed to connect to {_host}:{_port}. Retrying in {delay}ms...");
+						Logger?.LogWarning(ex, "Failed to connect to {Hostname}:{RemotePort}. Retrying in {DelayMS}ms...", _host, _port, delay);
 						try
 						{
 							await Task.Delay(delay, cancellationToken).ConfigureAwait(false);
diff --git a/test/FritzCallMonitor.Tests/CallMonitorEventArgsTest.cs b/test/FritzCallMonitor.Tests/CallMonitorEventArgsTest.cs
index fb65929..484b098 100644
--- a/test/FritzCallMonitor.Tests/CallMonitorEventArgsTest.cs
+++ b/test/FritzCallMonitor.Tests/CallMonitorEventArgsTest.cs
@@ -32,6 +32,8 @@ namespace FritzCallMonitor.Tests
 			Assert.IsNull(result.LinePort);
 			Assert.AreEqual("012345678901", result.ExternalNumber);
 			Assert.AreEqual("9876543", result.InternalNumber);
+			Assert.AreEqual(result.ExternalNumber, result.FromNumber);
+			Assert.AreEqual(result.InternalNumber, result.ToNumber);
 			Assert.IsNull(result.Duration);
 		}
 
@@ -48,6 +50,8 @@ namespace FritzCallMonitor.Tests
 			Assert.AreEqual(3, result.LinePort);
 			Assert.AreEqual("012345678901", result.ExternalNumber);
 			Assert.IsNull(result.InternalNumber);
+			Assert.IsNull(result.FromNumber);
+			Assert.IsNull(result.ToNumber);
 			Assert.IsNull(result.Duration);
 		}
 
@@ -64,6 +68,8 @@ namespace FritzCallMonitor.Tests
 			Assert.IsNull(result.LinePort);
 			Assert.IsNull(result.ExternalNumber);
 			Assert.IsNull(result.InternalNumber);
+			Assert.IsNull(result.FromNumber);
+			Assert.IsNull(result.ToNumber);
 			Assert.AreEqual(TimeSpan.FromSeconds(42), result.Duration);
 		}
 
@@ -80,6 +86,8 @@ namespace FritzCallMonitor.Tests
 			Assert.AreEqual(7, result.LinePort);
 			Assert.AreEqual("012345678901", result.ExternalNumber);
 			Assert.AreEqual("9876543", result.InternalNumber);
+			Assert.AreEqual(result.InternalNumber, result.FromNumber);
+			Assert.AreEqual(result.ExternalNumber, result.ToNumber);
 			Assert.IsNull(result.Duration);
 		}
 
@@ -114,6 +122,9 @@ namespace FritzCallMonitor.Tests
 			var result = CallMonitorEventArgs.Parse(line);
 			Assert.IsNotNull(result);
 			Assert.IsNull(result.LinePort);
+			Assert.AreEqual("012345678901", result.ExternalNumber);
+			Assert.IsNull(result.FromNumber);
+			Assert.IsNull(result.ToNumber);
 		}
 
 		[TestMethod]
@@ -123,6 +134,10 @@ namespace FritzCallMonitor.Tests
 			var result = CallMonitorEventArgs.Parse(line);
 			Assert.IsNotNull(result);
 			Assert.IsNull(result.LinePort);
+			Assert.AreEqual("012345678901", result.ExternalNumber);
+			Assert.AreEqual("9876543", result.InternalNumber);
+			Assert.AreEqual(result.InternalNumber, result.FromNumber);
+			Assert.AreEqual(result.ExternalNumber, result.ToNumber);
 		}
 
 		[TestMethod]
@@ -150,6 +165,8 @@ namespace FritzCallMonitor.Tests
 			Assert.IsNotNull(result);
 			Assert.AreEqual("012345678901", result.ExternalNumber);
 			Assert.AreEqual("9876543", result.InternalNumber);
+			Assert.AreEqual(result.ExternalNumber, result.FromNumber);
+			Assert.AreEqual(result.InternalNumber, result.ToNumber);
 		}
 	}
 }