diff --git a/application/controllers/Band.php b/application/controllers/Band.php
index bcfe045b9..385fa5259 100644
--- a/application/controllers/Band.php
+++ b/application/controllers/Band.php
@@ -207,8 +207,13 @@ class Band extends CI_Controller {
 		$frequencyto = $this->security->xss_clean($this->input->post('frequencyto', true));
 		$mode = $this->security->xss_clean($this->input->post('mode', true));
 
-		$this->bands->saveBandEdge($id, $frequencyfrom, $frequencyto, $mode);
-		echo json_encode(array('message' => 'OK'));
+		$overlap=$this->bands->check4overlapEdges($id, $frequencyfrom, $frequencyto, $mode);
+		if (!($overlap)) {
+			$this->bands->saveBandEdge($id, $frequencyfrom, $frequencyto, $mode);
+			echo json_encode(array('message' => 'OK'));
+		} else {
+			echo json_encode(array('message' => 'Overlapping'));
+		}
 		return;
 	}
 }
diff --git a/application/models/Bands.php b/application/models/Bands.php
index 1472b3429..129967f60 100644
--- a/application/models/Bands.php
+++ b/application/models/Bands.php
@@ -459,6 +459,21 @@ class Bands extends CI_Model {
 		$this->db->delete('bandedges', array('id' => $clean_id, 'userid' => $this->session->userdata('user_id')));
 	}
 
+	function check4overlapEdges($id, $frequencyfrom, $frequencyto, $mode) {
+		$edges = $this->bands->get_all_bandedges_for_user();
+		foreach ($edges as $item) {
+			if ($item->id == ($id ?? -1000)) {
+				continue;
+			}
+			$from = (int)$item->frequencyfrom;
+			$to = (int)$item->frequencyto;
+			if (!($frequencyto < $from || $frequencyfrom > $to)) {
+				return true;
+			}
+		}
+		return false;
+	}
+
 	function saveBandEdge($id, $frequencyfrom, $frequencyto, $mode) {
 		$data = array(
 			'frequencyfrom' => $frequencyfrom,
diff --git a/assets/js/sections/bandedges.js b/assets/js/sections/bandedges.js
index 2a1d439d6..fb2eb545c 100644
--- a/assets/js/sections/bandedges.js
+++ b/assets/js/sections/bandedges.js
@@ -81,7 +81,8 @@ function saveChanges(id) {
 			'mode': mode,
 		},
 		success: function (data) {
-
+				// todo: reload table if data.message == 'OK'
+				// todo: else show warning "oerlap" and reload aswell
 		}
 	});