diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index ffa969e80a559bc3c2fe0a952ea270863f488b54..48868b5aa076fce1dc0324fb12243937d10c1a0c 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -12,7 +12,7 @@ For non-security related bugs, log a new issue in the appropriate GitHub reposit
 * [AspNetCore](https://github.com/aspnet/AspNetCore)
 * [Entity Framework Core](https://github.com/dotnet/efcore)
 * [Tooling](https://github.com/aspnet/Tooling)
-* [Extensions](https://github.com/aspnet/Extensions)
+* [Extensions](https://github.com/dotnet/extensions)
 
 Or browse the full list of repositories in the [aspnet](https://github.com/aspnet/) organization.
 
diff --git a/README.md b/README.md
index 683e7a8603a53d194e783e16c1f0c308d513292b..c7e6229fad31db39a6baa9b40057ab3f7d798e92 100644
--- a/README.md
+++ b/README.md
@@ -33,7 +33,7 @@ These are some other repos for related projects:
 
 * [Documentation](https://github.com/aspnet/Docs) - documentation sources for https://docs.microsoft.com/aspnet/core/
 * [Entity Framework Core](https://github.com/dotnet/efcore) - data access technology
-* [Extensions](https://github.com/aspnet/Extensions) - Logging, configuration, dependency injection, and more.
+* [Extensions](https://github.com/dotnet/extensions) - Logging, configuration, dependency injection, and more.
 
 ## Code of conduct
 
diff --git a/docs/ReferenceResolution.md b/docs/ReferenceResolution.md
index 8f1fe7067534e933295a395c4ce607e71359d921..0c5d231bef27f9b84f9f81051f67b7879f39a296 100644
--- a/docs/ReferenceResolution.md
+++ b/docs/ReferenceResolution.md
@@ -69,7 +69,7 @@ Steps for adding a new package dependency to an existing project. Let's say I'm
        If you don't know the commit hash of the source code used to produce "0.0.1-beta-1", you can use `000000` as a placeholder for `Sha`
        as its value is unimportant and will be updated the next time the bot runs.
 
-        If the new dependency comes from dotnet/CoreFx, dotnet/code-setup or aspnet/Extensions, add a
+        If the new dependency comes from dotnet/CoreFx, dotnet/code-setup or dotnet/extensions, add a
         `CoherentParentDependency` attribute to the `<Dependency>` element as shown below. This example indicates the
         dotnet/CoreFx dependency version should be determined based on the build that produced the chosen
         Microsoft.NETCore.App. That is, the dotnet/CoreFx dependency and Microsoft.NETCore.App should be
@@ -82,7 +82,7 @@ Steps for adding a new package dependency to an existing project. Let's say I'm
         ```
 
         The attribute value should be `"Microsoft.Extensions.Logging"` for dotnet/core-setup dependencies and
-        `"Microsoft.CodeAnalysis.Razor"` for aspnet/Extensions dependencies.
+        `"Microsoft.CodeAnalysis.Razor"` for dotnet/extensions dependencies.
 
 ## Example: make a breaking change to references
 
diff --git a/eng/SharedFramework.External.props b/eng/SharedFramework.External.props
index 8fdebc787d45b988ba59ef9ea13f3f4b1e3f9068..5c0c46740e275dfd06f916b664fbfab9ec0240d4 100644
--- a/eng/SharedFramework.External.props
+++ b/eng/SharedFramework.External.props
@@ -7,7 +7,7 @@
 <Project>
 
   <ItemGroup>
-    <!-- Dependencies from aspnet/Extensions -->
+    <!-- Dependencies from dotnet/extensions -->
     <ExternalAspNetCoreAppReference Include="Microsoft.Extensions.Caching.Abstractions"                    Version="$(MicrosoftExtensionsCachingAbstractionsPackageVersion)" />
     <ExternalAspNetCoreAppReference Include="Microsoft.Extensions.Caching.Memory"                          Version="$(MicrosoftExtensionsCachingMemoryPackageVersion)" />
     <ExternalAspNetCoreAppReference Include="Microsoft.Extensions.Configuration.Abstractions"              Version="$(MicrosoftExtensionsConfigurationAbstractionsPackageVersion)" />
diff --git a/eng/Versions.props b/eng/Versions.props
index 7af521d08db462f3a81606793b4a9c5491804cae..8e8e94e015da7f52a25f79396ae8b30e2b49dc3c 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -96,7 +96,7 @@
     <MicrosoftNETCorePlatformsPackageVersion>5.0.0-alpha.1.19556.7</MicrosoftNETCorePlatformsPackageVersion>
     <!-- Packages from dotnet/blazor -->
     <MicrosoftAspNetCoreBlazorMonoPackageVersion>3.1.0-preview4.19578.1</MicrosoftAspNetCoreBlazorMonoPackageVersion>
-    <!-- Packages from aspnet/Extensions -->
+    <!-- Packages from dotnet/extensions -->
     <InternalAspNetCoreAnalyzersPackageVersion>5.0.0-alpha.1.20056.3</InternalAspNetCoreAnalyzersPackageVersion>
     <MicrosoftAspNetCoreAnalyzerTestingPackageVersion>5.0.0-alpha.1.20056.3</MicrosoftAspNetCoreAnalyzerTestingPackageVersion>
     <MicrosoftAspNetCoreBenchmarkRunnerSourcesPackageVersion>5.0.0-alpha.1.20056.3</MicrosoftAspNetCoreBenchmarkRunnerSourcesPackageVersion>
diff --git a/src/Components/Blazor/Blazor/src/Hosting/IWebAssemblyServiceFactoryAdapter.cs b/src/Components/Blazor/Blazor/src/Hosting/IWebAssemblyServiceFactoryAdapter.cs
index c790a3c8791f2c973f99ee537cc18cb30d98d0da..ff63ec3a669c41afc07863f5451e7f41a829b1f7 100644
--- a/src/Components/Blazor/Blazor/src/Hosting/IWebAssemblyServiceFactoryAdapter.cs
+++ b/src/Components/Blazor/Blazor/src/Hosting/IWebAssemblyServiceFactoryAdapter.cs
@@ -6,7 +6,7 @@ using Microsoft.Extensions.DependencyInjection;
 
 namespace Microsoft.AspNetCore.Blazor.Hosting
 {
-    // Equivalent to https://github.com/aspnet/Extensions/blob/master/src/Hosting/Hosting/src/Internal/IServiceFactoryAdapter.cs
+    // Equivalent to https://github.com/dotnet/extensions/blob/master/src/Hosting/Hosting/src/Internal/IServiceFactoryAdapter.cs
 
     internal interface IWebAssemblyServiceFactoryAdapter
     {
diff --git a/src/Components/Blazor/Blazor/src/Hosting/WebAssemblyServiceFactoryAdapter.cs b/src/Components/Blazor/Blazor/src/Hosting/WebAssemblyServiceFactoryAdapter.cs
index fcc879653abb5dbaba4d2766d0f3547c62e97ac6..2cfc0ba093ead384a1d0de9bef37197989d20e49 100644
--- a/src/Components/Blazor/Blazor/src/Hosting/WebAssemblyServiceFactoryAdapter.cs
+++ b/src/Components/Blazor/Blazor/src/Hosting/WebAssemblyServiceFactoryAdapter.cs
@@ -6,7 +6,7 @@ using Microsoft.Extensions.DependencyInjection;
 
 namespace Microsoft.AspNetCore.Blazor.Hosting
 {
-    // Equivalent to https://github.com/aspnet/Extensions/blob/master/src/Hosting/Hosting/src/Internal/ServiceFactoryAdapter.cs
+    // Equivalent to https://github.com/dotnet/extensions/blob/master/src/Hosting/Hosting/src/Internal/ServiceFactoryAdapter.cs
 
     internal class WebAssemblyServiceFactoryAdapter<TContainerBuilder> : IWebAssemblyServiceFactoryAdapter
     {
diff --git a/src/Servers/IIS/IIS/benchmarks/IIS.Performance/StartupTimeBenchmark.cs b/src/Servers/IIS/IIS/benchmarks/IIS.Performance/StartupTimeBenchmark.cs
index 3cb8d3a1c80a6dfe5d38da2e7b839f4f548820a1..91bd40a52915593be6d16952b7e67460da35459e 100644
--- a/src/Servers/IIS/IIS/benchmarks/IIS.Performance/StartupTimeBenchmark.cs
+++ b/src/Servers/IIS/IIS/benchmarks/IIS.Performance/StartupTimeBenchmark.cs
@@ -21,7 +21,7 @@ namespace Microsoft.AspNetCore.Server.IIS.Performance
         public void Setup()
         {
 // Deployers do not work in distributed environments
-// see https://github.com/aspnet/AspNetCore/issues/10268 and https://github.com/aspnet/Extensions/issues/1697
+// see https://github.com/aspnet/AspNetCore/issues/10268 and https://github.com/dotnet/extensions/issues/1697
 #pragma warning disable 0618
             var deploymentParameters = new DeploymentParameters(Path.Combine(TestPathUtilities.GetSolutionRootDirectory("IISIntegration"), "test/testassets/InProcessWebSite"),
                 ServerType.IISExpress,
diff --git a/src/Servers/IIS/IIS/test/Common.FunctionalTests/PublishedApplicationPublisher.cs b/src/Servers/IIS/IIS/test/Common.FunctionalTests/PublishedApplicationPublisher.cs
index 8bf370e640b6704be7f323d32eb4b9393a324b88..9369d702164552a6f199ffa8ed26f9544eaed944 100644
--- a/src/Servers/IIS/IIS/test/Common.FunctionalTests/PublishedApplicationPublisher.cs
+++ b/src/Servers/IIS/IIS/test/Common.FunctionalTests/PublishedApplicationPublisher.cs
@@ -43,7 +43,7 @@ namespace Microsoft.AspNetCore.Server.IIS.FunctionalTests
         private string GetProjectReferencePublishLocation(DeploymentParameters deploymentParameters)
         {
 // Deployers do not work in distributed environments
-// see https://github.com/aspnet/AspNetCore/issues/10268 and https://github.com/aspnet/Extensions/issues/1697
+// see https://github.com/aspnet/AspNetCore/issues/10268 and https://github.com/dotnet/extensions/issues/1697
 #pragma warning disable 0618
             var testAssetsBasePath = Path.Combine(TestPathUtilities.GetSolutionRootDirectory("IISIntegration"), "IIS", "test", "testassets", _applicationName);
 #pragma warning restore 0618
diff --git a/src/SignalR/server/Specification.Tests/src/Internal/TaskExtensions.cs b/src/SignalR/server/Specification.Tests/src/Internal/TaskExtensions.cs
index 1a6b2a74859db5828d6bc55f12da062e9a089400..7b431133c56285cf4e565edea5ed40bd567b2f0d 100644
--- a/src/SignalR/server/Specification.Tests/src/Internal/TaskExtensions.cs
+++ b/src/SignalR/server/Specification.Tests/src/Internal/TaskExtensions.cs
@@ -9,7 +9,7 @@ using System.Threading.Tasks;
 
 namespace Microsoft.AspNetCore.Testing
 {
-    // Copied from https://github.com/aspnet/Extensions/blob/master/src/TestingUtils/Microsoft.AspNetCore.Testing/src/TaskExtensions.cs
+    // Copied from https://github.com/dotnet/extensions/blob/master/src/TestingUtils/Microsoft.AspNetCore.Testing/src/TaskExtensions.cs
     // Required because Microsoft.AspNetCore.Testing is not shipped
     internal static class TaskExtensions
     {