diff --git a/internal/provider/resource_dns_record.go b/internal/provider/resource_dns_record.go
index 6945bf6..b0790ff 100644
--- a/internal/provider/resource_dns_record.go
+++ b/internal/provider/resource_dns_record.go
@@ -234,13 +234,13 @@ func (r *dnsRecordResource) Update(ctx context.Context, req resource.UpdateReque
 	}
 
 	updateReq := dynuclient.UpdateDNSRecordRequest{
-		NodeName:   recordNodeName(plan.NodeName, plan.Hostname, domainName),
+		NodeName:   recordNodeName(preferKnownString(plan.NodeName, state.NodeName), plan.Hostname, domainName),
 		RecordType: recordType,
 		Content:    stringPointerFromOptionalContent(plan.Content),
-		TTL:        int64FromOptional(plan.TTL),
-		State:      boolPointerFromOptional(plan.State),
-		Group:      stringFromOptional(plan.Group),
-		Host:       stringFromOptional(plan.Host),
+		TTL:        int64FromOptional(preferKnownInt64(plan.TTL, state.TTL)),
+		State:      boolPointerFromOptional(preferKnownBool(plan.State, state.State)),
+		Group:      stringFromOptional(preferKnownString(plan.Group, state.Group)),
+		Host:       stringFromOptional(preferKnownString(plan.Host, state.Host)),
 	}
 	if !validateDNSRecordContentForType(updateReq.RecordType, updateReq.Content, dynamicIntent, &resp.Diagnostics) {
 		return
@@ -390,6 +390,36 @@ func stringFromOptional(value types.String) string {
 	return strings.TrimSpace(value.ValueString())
 }
 
+func preferKnownString(planValue types.String, stateValue types.String) types.String {
+	if !planValue.IsNull() && !planValue.IsUnknown() {
+		return planValue
+	}
+	if !stateValue.IsNull() && !stateValue.IsUnknown() {
+		return stateValue
+	}
+	return planValue
+}
+
+func preferKnownInt64(planValue types.Int64, stateValue types.Int64) types.Int64 {
+	if !planValue.IsNull() && !planValue.IsUnknown() {
+		return planValue
+	}
+	if !stateValue.IsNull() && !stateValue.IsUnknown() {
+		return stateValue
+	}
+	return planValue
+}
+
+func preferKnownBool(planValue types.Bool, stateValue types.Bool) types.Bool {
+	if !planValue.IsNull() && !planValue.IsUnknown() {
+		return planValue
+	}
+	if !stateValue.IsNull() && !stateValue.IsUnknown() {
+		return stateValue
+	}
+	return planValue
+}
+
 func stringPointerFromOptionalContent(value types.String) *string {
 	if value.IsNull() || value.IsUnknown() {
 		return nil
diff --git a/internal/provider/resource_dns_record_integration_test.go b/internal/provider/resource_dns_record_integration_test.go
index a22c721..7cf7efb 100644
--- a/internal/provider/resource_dns_record_integration_test.go
+++ b/internal/provider/resource_dns_record_integration_test.go
@@ -232,13 +232,13 @@ func TestIntegrationResourceDNSRecordUpdateUsesStateIDWhenPlanIDUnknown(t *testi
 
 	createPlan := dnsRecordResourceModel{
 		Hostname:   types.StringValue("api.a.example.com"),
-		RecordType: types.StringValue("A"),
-		Content:    types.StringValue("192.0.2.123"),
+		RecordType: types.StringValue("TXT"),
+		Content:    types.StringValue("v=one"),
 		TTL:        types.Int64Value(60),
 		State:      types.BoolValue(true),
-		Group:      types.StringValue("test"),
-		Host:       types.StringNull(),
-		NodeName:   types.StringNull(),
+		Group:      types.StringValue("test-group"),
+		Host:       types.StringValue("test-host"),
+		NodeName:   types.StringValue("test-node"),
 	}
 
 	plan := tfsdk.Plan{Schema: schemaResp.Schema}
@@ -266,7 +266,7 @@ func TestIntegrationResourceDNSRecordUpdateUsesStateIDWhenPlanIDUnknown(t *testi
 	updatePlan.Host = types.StringUnknown()
 	updatePlan.NodeName = types.StringUnknown()
 	updatePlan.UpdatedOn = types.StringUnknown()
-	updatePlan.Content = types.StringValue("192.0.3.123")
+	updatePlan.Content = types.StringValue("v=two")
 
 	plan = tfsdk.Plan{Schema: schemaResp.Schema}
 	if diags := plan.Set(ctx, &updatePlan); diags.HasError() {
@@ -288,9 +288,18 @@ func TestIntegrationResourceDNSRecordUpdateUsesStateIDWhenPlanIDUnknown(t *testi
 	if state.ID.IsNull() || state.ID.IsUnknown() {
 		t.Fatalf("expected ID to remain known after update")
 	}
-	if state.Content.ValueString() != "192.0.3.123" {
+	if state.Content.ValueString() != "v=two" {
 		t.Fatalf("expected updated content, got %q", state.Content.ValueString())
 	}
+	if state.Group.ValueString() != "test-group" {
+		t.Fatalf("expected group preserved from state, got %q", state.Group.ValueString())
+	}
+	if state.Host.ValueString() != "test-host" {
+		t.Fatalf("expected host preserved from state, got %q", state.Host.ValueString())
+	}
+	if state.NodeName.ValueString() != "test-node" {
+		t.Fatalf("expected node_name preserved from state, got %q", state.NodeName.ValueString())
+	}
 }
 
 func configureResource(t *testing.T, r resource.ResourceWithConfigure, baseURL string) {