diff --git a/plugin/discovery/get.go b/plugin/discovery/get.go
index 2f6ac1a91..751844e17 100644
--- a/plugin/discovery/get.go
+++ b/plugin/discovery/get.go
@@ -134,6 +134,7 @@ func (i *ProviderInstaller) Get(provider string, req Constraints) (PluginMeta, e
 	if len(allVersions.Versions) == 0 {
 		return PluginMeta{}, ErrorNoSuitableVersion
 	}
+	providerSource := allVersions.ID
 
 	// Filter the list of plugin versions to those which meet the version constraints
 	versions := allowedVersions(allVersions, req)
@@ -175,7 +176,7 @@ func (i *ProviderInstaller) Get(provider string, req Constraints) (PluginMeta, e
 		return PluginMeta{}, ErrorNoVersionCompatibleWithPlatform
 	}
 
-	downloadURLs, err := i.listProviderDownloadURLs(provider, versionMeta.Version)
+	downloadURLs, err := i.listProviderDownloadURLs(providerSource, versionMeta.Version)
 	providerURL := downloadURLs.DownloadURL
 
 	i.Ui.Info(fmt.Sprintf("- Downloading plugin for provider %q (%s)...", provider, versionMeta.Version))
@@ -193,6 +194,9 @@ func (i *ProviderInstaller) Get(provider string, req Constraints) (PluginMeta, e
 		}
 	}
 
+	printedProviderName := fmt.Sprintf("%s (%s)", provider, providerSource)
+	i.Ui.Info(fmt.Sprintf("- Downloading plugin for provider %q (%s)...", printedProviderName, versionMeta.Version))
+	log.Printf("[DEBUG] getting provider %q version %q", printedProviderName, versionMeta.Version)
 	err = i.install(provider, v, providerURL)
 	if err != nil {
 		return PluginMeta{}, err
diff --git a/plugin/discovery/get_test.go b/plugin/discovery/get_test.go
index 534a01fa5..73e8bdd18 100644
--- a/plugin/discovery/get_test.go
+++ b/plugin/discovery/get_test.go
@@ -130,6 +130,7 @@ func testHandler(w http.ResponseWriter, r *http.Request) {
 
 func testReleaseServer() *httptest.Server {
 	handler := http.NewServeMux()
+	handler.HandleFunc("/v1/providers/-/", testHandler)
 	handler.HandleFunc("/v1/providers/terraform-providers/", testHandler)
 	handler.HandleFunc("/terraform-provider-template/", testChecksumHandler)
 	handler.HandleFunc("/terraform-provider-badsig/", testChecksumHandler)
@@ -479,7 +480,7 @@ func Disco(s *httptest.Server) *disco.Disco {
 }
 
 var versionList = response.TerraformProvider{
-	ID: "test",
+	ID: "terraform-providers/test",
 	Versions: []*response.TerraformProviderVersion{
 		{Version: "1.2.1"},
 		{Version: "1.2.3"},
diff --git a/registry/regsrc/terraform_provider.go b/registry/regsrc/terraform_provider.go
index 88acddfa2..58dedee5e 100644
--- a/registry/regsrc/terraform_provider.go
+++ b/registry/regsrc/terraform_provider.go
@@ -3,6 +3,7 @@ package regsrc
 import (
 	"fmt"
 	"runtime"
+	"strings"
 
 	"github.com/hashicorp/terraform/svchost"
 )
@@ -10,7 +11,7 @@ import (
 var (
 	// DefaultProviderNamespace represents the namespace for canonical
 	// HashiCorp-controlled providers.
-	DefaultProviderNamespace = "terraform-providers"
+	DefaultProviderNamespace = "-"
 )
 
 // TerraformProvider describes a Terraform Registry Provider source.
@@ -31,9 +32,14 @@ func NewTerraformProvider(name, os, arch string) *TerraformProvider {
 		arch = runtime.GOARCH
 	}
 
+	// separate namespace if included
+	namespace := DefaultProviderNamespace
+	if names := strings.SplitN(name, "/", 2); len(names) == 2 {
+		namespace, name = names[0], names[1]
+	}
 	p := &TerraformProvider{
 		RawHost:      PublicRegistryHost,
-		RawNamespace: DefaultProviderNamespace,
+		RawNamespace: namespace,
 		RawName:      name,
 		OS:           os,
 		Arch:         arch,
diff --git a/registry/regsrc/terraform_provider_test.go b/registry/regsrc/terraform_provider_test.go
new file mode 100644
index 000000000..50ffab073
--- /dev/null
+++ b/registry/regsrc/terraform_provider_test.go
@@ -0,0 +1,48 @@
+package regsrc
+
+import (
+	"testing"
+)
+
+func TestNewTerraformProviderNamespace(t *testing.T) {
+	tests := []struct {
+		name              string
+		provider          string
+		expectedNamespace string
+		expectedName      string
+	}{
+		{
+			name:              "default",
+			provider:          "null",
+			expectedNamespace: "-",
+			expectedName:      "null",
+		}, {
+			name:              "explicit",
+			provider:          "terraform-providers/null",
+			expectedNamespace: "terraform-providers",
+			expectedName:      "null",
+		}, {
+			name:              "community",
+			provider:          "community-providers/null",
+			expectedNamespace: "community-providers",
+			expectedName:      "null",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			actual := NewTerraformProvider(tt.provider, "", "")
+
+			if actual == nil {
+				t.Fatal("NewTerraformProvider() unexpectedly returned nil provider")
+			}
+
+			if v := actual.RawNamespace; v != tt.expectedNamespace {
+				t.Fatalf("RawNamespace = %v, wanted %v", v, tt.expectedNamespace)
+			}
+			if v := actual.RawName; v != tt.expectedName {
+				t.Fatalf("RawName = %v, wanted %v", v, tt.expectedName)
+			}
+		})
+	}
+}
diff --git a/registry/test/mock_registry.go b/registry/test/mock_registry.go
index e94e6c173..9688fbeb5 100644
--- a/registry/test/mock_registry.go
+++ b/registry/test/mock_registry.go
@@ -100,14 +100,14 @@ var testMods = map[string][]testMod{
 }
 
 var testProviders = map[string][]testProvider{
-	"terraform-providers/foo": {
+	"-/foo": {
 		{
 			version: "0.2.3",
 			url:     "https://releases.hashicorp.com/terraform-provider-foo/0.2.3/terraform-provider-foo.zip",
 		},
 		{version: "0.3.0"},
 	},
-	"terraform-providers/bar": {
+	"-/bar": {
 		{
 			version: "0.1.1",
 			url:     "https://releases.hashicorp.com/terraform-provider-bar/0.1.1/terraform-provider-bar.zip",
@@ -116,6 +116,22 @@ var testProviders = map[string][]testProvider{
 	},
 }
 
+func providerAlias(provider string) string {
+	re := regexp.MustCompile("^-/")
+	if re.MatchString(provider) {
+		return re.ReplaceAllString(provider, "terraform-providers/")
+	}
+	return provider
+}
+
+func init() {
+	// Add provider aliases
+	for provider, info := range testProviders {
+		alias := providerAlias(provider)
+		testProviders[alias] = info
+	}
+}
+
 func latestVersion(versions []string) string {
 	var col version.Collection
 	for _, v := range versions {
@@ -287,7 +303,7 @@ func mockRegHandler() http.Handler {
 			}
 		}
 
-		name := fmt.Sprintf("%s", matches[1])
+		name := providerAlias(fmt.Sprintf("%s", matches[1]))
 		versions, ok := testProviders[name]
 		if !ok {
 			http.NotFound(w, r)
@@ -295,7 +311,7 @@ func mockRegHandler() http.Handler {
 		}
 
 		// only adding the single requested provider for now
-		// this is the minimal that any regisry is epected to support
+		// this is the minimal that any registry is expected to support
 		pvs := &response.TerraformProviderVersions{
 			ID: name,
 		}