diff --git a/CHANGELOG.md b/CHANGELOG.md
index dc34ab9..8535b45 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -27,6 +27,7 @@
   - Nodes are now only written to database if they are registrated successfully
 - Fix a limitation in the ACLs that prevented users to write rules with `*` as source [#374](https://github.com/juanfont/headscale/issues/374)
 - Reduce the overhead of marshal/unmarshal for Hostinfo, routes and endpoints by using specific types in Machine [#371](https://github.com/juanfont/headscale/pull/371)
+- Apply normalization function to FQDN on hostnames when hosts registers and retrieve informations [#363](https://github.com/juanfont/headscale/issues/363)
 
 ## 0.14.0 (2022-02-24)
 
diff --git a/acls.go b/acls.go
index 9548480..63c3955 100644
--- a/acls.go
+++ b/acls.go
@@ -444,7 +444,7 @@ func expandGroup(
 				errInvalidGroup,
 			)
 		}
-		grp, err := NormalizeNamespaceName(group, stripEmailDomain)
+		grp, err := NormalizeToFQDNRules(group, stripEmailDomain)
 		if err != nil {
 			return []string{}, fmt.Errorf(
 				"failed to normalize group %q, err: %w",
diff --git a/api.go b/api.go
index 3b3b675..b5e885a 100644
--- a/api.go
+++ b/api.go
@@ -134,6 +134,19 @@ func (h *Headscale) RegistrationHandler(ctx *gin.Context) {
 
 			return
 		}
+		hname, err := NormalizeToFQDNRules(
+			req.Hostinfo.Hostname,
+			h.cfg.OIDC.StripEmaildomain,
+		)
+		if err != nil {
+			log.Error().
+				Caller().
+				Str("func", "RegistrationHandler").
+				Str("hostinfo.name", req.Hostinfo.Hostname).
+				Err(err)
+
+			return
+		}
 
 		// The machine did not have a key to authenticate, which means
 		// that we rely on a method that calls back some how (OpenID or CLI)
@@ -141,7 +154,7 @@ func (h *Headscale) RegistrationHandler(ctx *gin.Context) {
 		// happens
 		newMachine := Machine{
 			MachineKey: machineKeyStr,
-			Name:       req.Hostinfo.Hostname,
+			Name:       hname,
 			NodeKey:    NodePublicKeyStripPrefix(req.NodeKey),
 			LastSeen:   &now,
 			Expiry:     &time.Time{},
diff --git a/namespaces.go b/namespaces.go
index 3151784..bb32795 100644
--- a/namespaces.go
+++ b/namespaces.go
@@ -41,7 +41,7 @@ type Namespace struct {
 // CreateNamespace creates a new Namespace. Returns error if could not be created
 // or another namespace already exists.
 func (h *Headscale) CreateNamespace(name string) (*Namespace, error) {
-	err := CheckNamespaceName(name)
+	err := CheckForFQDNRules(name)
 	if err != nil {
 		return nil, err
 	}
@@ -104,7 +104,7 @@ func (h *Headscale) RenameNamespace(oldName, newName string) error {
 	if err != nil {
 		return err
 	}
-	err = CheckNamespaceName(newName)
+	err = CheckForFQDNRules(newName)
 	if err != nil {
 		return err
 	}
@@ -150,7 +150,7 @@ func (h *Headscale) ListNamespaces() ([]Namespace, error) {
 
 // ListMachinesInNamespace gets all the nodes in a given namespace.
 func (h *Headscale) ListMachinesInNamespace(name string) ([]Machine, error) {
-	err := CheckNamespaceName(name)
+	err := CheckForFQDNRules(name)
 	if err != nil {
 		return nil, err
 	}
@@ -169,7 +169,7 @@ func (h *Headscale) ListMachinesInNamespace(name string) ([]Machine, error) {
 
 // SetMachineNamespace assigns a Machine to a namespace.
 func (h *Headscale) SetMachineNamespace(machine *Machine, namespaceName string) error {
-	err := CheckNamespaceName(namespaceName)
+	err := CheckForFQDNRules(namespaceName)
 	if err != nil {
 		return err
 	}
@@ -237,9 +237,9 @@ func (n *Namespace) toProto() *v1.Namespace {
 	}
 }
 
-// NormalizeNamespaceName will replace forbidden chars in namespace
+// NormalizeToFQDNRules will replace forbidden chars in namespace
 // it can also return an error if the namespace doesn't respect RFC 952 and 1123.
-func NormalizeNamespaceName(name string, stripEmailDomain bool) (string, error) {
+func NormalizeToFQDNRules(name string, stripEmailDomain bool) (string, error) {
 	name = strings.ToLower(name)
 	name = strings.ReplaceAll(name, "'", "")
 	atIdx := strings.Index(name, "@")
@@ -263,7 +263,7 @@ func NormalizeNamespaceName(name string, stripEmailDomain bool) (string, error)
 	return name, nil
 }
 
-func CheckNamespaceName(name string) error {
+func CheckForFQDNRules(name string) error {
 	if len(name) > labelHostnameLength {
 		return fmt.Errorf(
 			"Namespace must not be over 63 chars. %v doesn't comply with this rule: %w",
diff --git a/namespaces_test.go b/namespaces_test.go
index 1710f7d..5d873bd 100644
--- a/namespaces_test.go
+++ b/namespaces_test.go
@@ -233,7 +233,7 @@ func (s *Suite) TestGetMapResponseUserProfiles(c *check.C) {
 	c.Assert(found, check.Equals, true)
 }
 
-func TestNormalizeNamespaceName(t *testing.T) {
+func TestNormalizeToFQDNRules(t *testing.T) {
 	type args struct {
 		name             string
 		stripEmailDomain bool
@@ -310,10 +310,10 @@ func TestNormalizeNamespaceName(t *testing.T) {
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			got, err := NormalizeNamespaceName(tt.args.name, tt.args.stripEmailDomain)
+			got, err := NormalizeToFQDNRules(tt.args.name, tt.args.stripEmailDomain)
 			if (err != nil) != tt.wantErr {
 				t.Errorf(
-					"NormalizeNamespaceName() error = %v, wantErr %v",
+					"NormalizeToFQDNRules() error = %v, wantErr %v",
 					err,
 					tt.wantErr,
 				)
@@ -321,13 +321,13 @@ func TestNormalizeNamespaceName(t *testing.T) {
 				return
 			}
 			if got != tt.want {
-				t.Errorf("NormalizeNamespaceName() = %v, want %v", got, tt.want)
+				t.Errorf("NormalizeToFQDNRules() = %v, want %v", got, tt.want)
 			}
 		})
 	}
 }
 
-func TestCheckNamespaceName(t *testing.T) {
+func TestCheckForFQDNRules(t *testing.T) {
 	type args struct {
 		name string
 	}
@@ -366,8 +366,8 @@ func TestCheckNamespaceName(t *testing.T) {
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			if err := CheckNamespaceName(tt.args.name); (err != nil) != tt.wantErr {
-				t.Errorf("CheckNamespaceName() error = %v, wantErr %v", err, tt.wantErr)
+			if err := CheckForFQDNRules(tt.args.name); (err != nil) != tt.wantErr {
+				t.Errorf("CheckForFQDNRules() error = %v, wantErr %v", err, tt.wantErr)
 			}
 		})
 	}
diff --git a/oidc.go b/oidc.go
index 987bc8b..29ce351 100644
--- a/oidc.go
+++ b/oidc.go
@@ -253,7 +253,7 @@ func (h *Headscale) OIDCCallback(ctx *gin.Context) {
 		return
 	}
 
-	namespaceName, err := NormalizeNamespaceName(
+	namespaceName, err := NormalizeToFQDNRules(
 		claims.Email,
 		h.cfg.OIDC.StripEmaildomain,
 	)
diff --git a/poll.go b/poll.go
index 1ae8cd0..15945a9 100644
--- a/poll.go
+++ b/poll.go
@@ -83,7 +83,18 @@ func (h *Headscale) PollNetMapHandler(ctx *gin.Context) {
 		Str("machine", machine.Name).
 		Msg("Found machine in database")
 
-	machine.Name = req.Hostinfo.Hostname
+	hname, err := NormalizeToFQDNRules(
+		req.Hostinfo.Hostname,
+		h.cfg.OIDC.StripEmaildomain,
+	)
+	if err != nil {
+		log.Error().
+			Caller().
+			Str("func", "handleAuthKey").
+			Str("hostinfo.name", req.Hostinfo.Hostname).
+			Err(err)
+	}
+	machine.Name = hname
 	machine.HostInfo = HostInfo(*req.Hostinfo)
 	machine.DiscoKey = DiscoPublicKeyStripPrefix(req.DiscoKey)
 	now := time.Now().UTC()