diff --git a/unms.go b/unms.go
index b5f6f73..4a96415 100644
--- a/unms.go
+++ b/unms.go
@@ -148,7 +148,11 @@ func processUNMSAPIRouter() []node {
 		// API CALL FOR DHCP LEASES
 		log.Println("Getting DHCP Leases of ", d.Devices[i].Name, "from UNMS API")
 		var dhcpleases UNMSdhcp
-		UnmsCallAPI("/devices/erouters/"+dev.Identification.ID+"/dhcp/leases", &dhcpleases)
+		if isOnline {
+			UnmsCallAPI("/devices/erouters/"+dev.Identification.ID+"/dhcp/leases", &dhcpleases)
+		} else {
+			log.Println("Router ist offline, skipping DHCP Leases")
+		}
 
 		// Open connection to InfluxDB
 		bp, err := client.NewBatchPoints(client.BatchPointsConfig{