diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8f8b2ab..61652bf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 ### Changed
  - Network/MAC/DNS address utils are now enumerating all adapter types
  - Ignoring Crestron ethernet parameters that say "Invalid Value"
+ - Skipping network interfaces with an invalid adapter id
 
 ## [10.2.0] - 2019-12-04
 ### Added
diff --git a/ICD.Common.Utils/IcdEnvironment.SimplSharp.cs b/ICD.Common.Utils/IcdEnvironment.SimplSharp.cs
index 3d156f8..e43e2fa 100644
--- a/ICD.Common.Utils/IcdEnvironment.SimplSharp.cs
+++ b/ICD.Common.Utils/IcdEnvironment.SimplSharp.cs
@@ -46,6 +46,9 @@ namespace ICD.Common.Utils
 					try
 					{
 						short id = CrestronEthernetHelper.GetAdapterdIdForSpecifiedAdapterType(type);
+						if (id >= InitialParametersClass.NumberOfEthernetInterfaces)
+							continue;
+
 						address = CrestronEthernetHelper.GetEthernetParameter(param, id);
 					}
 					catch (ArgumentException)
@@ -77,6 +80,9 @@ namespace ICD.Common.Utils
 					try
 					{
 						short id = CrestronEthernetHelper.GetAdapterdIdForSpecifiedAdapterType(type);
+						if (id >= InitialParametersClass.NumberOfEthernetInterfaces)
+							continue;
+
 						macAddress = CrestronEthernetHelper.GetEthernetParameter(param, id);
 					}
 					catch (ArgumentException)
@@ -105,6 +111,9 @@ namespace ICD.Common.Utils
 				try
 				{
 					short id = CrestronEthernetHelper.GetAdapterdIdForSpecifiedAdapterType(type);
+					if (id >= InitialParametersClass.NumberOfEthernetInterfaces)
+						return null;
+
 					string status = CrestronEthernetHelper.GetEthernetParameter(param, id);
 
 					if (!string.IsNullOrEmpty(status) && !status.Equals(INVALID_VALUE))
@@ -137,6 +146,9 @@ namespace ICD.Common.Utils
 					try
 					{
 						short id = CrestronEthernetHelper.GetAdapterdIdForSpecifiedAdapterType(type);
+						if (id >= InitialParametersClass.NumberOfEthernetInterfaces)
+							continue;
+
 						hostname = CrestronEthernetHelper.GetEthernetParameter(param, id);
 					}
 					catch (ArgumentException)