diff --git a/lib/numbers.sh b/lib/numbers.sh
index c7612be..db4c4dc 100644
--- a/lib/numbers.sh
+++ b/lib/numbers.sh
@@ -9,5 +9,5 @@ function find_mac {
     id="${1}"
     ip="${2}"
 
-    cat "/etc/dnsmasq.d/${id}.conf"  | grep "${ip}" | cut -d, -f 1 | cut -d= -f2
+    cat "/etc/dnsmasq.d/${id}.conf"  | grep ",${ip}$" | cut -d, -f 1 | cut -d= -f2
 }
\ No newline at end of file