diff --git a/README.md b/README.md
index 59379fa..6093ab0 100644
--- a/README.md
+++ b/README.md
@@ -49,6 +49,8 @@ docker compose up netbox-importer
 - `NETWORKS`: comma-separated networks to scan
 - `TENANT`: NetBox tenant name
 - `SSL_VERIFY`: whether to verify SSL (`false`, `0`, `no` disable verification)
+- `SCAN_SOURCE`: `env`, `netbox`, or `mixed` (use NetBox prefix data for scan networks)
+- `NETBOX_PREFIX_STATUS`: optional prefix status filter for NetBox prefixes (for example `active`)
 
 ## Output format
 
diff --git a/docker-compose.yml b/docker-compose.yml
index fdaa3f7..42c424a 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -21,3 +21,4 @@ services:
       - NETWORKS=192.168.85.0/24,192.168.86.0/24
       - TENANT=Xxxxx Praha
       - SSL_VERIFY=false
+      - SCAN_SOURCE=env
diff --git a/ipscan-v2.py b/ipscan-v2.py
index c8deb9f..7a6d55f 100644
--- a/ipscan-v2.py
+++ b/ipscan-v2.py
@@ -18,6 +18,10 @@ nm = nmap.PortScanner()
 networks_env = os.getenv("NETWORKS", "192.168.85.0/24,192.168.86.0/24")
 networks = [network.strip() for network in networks_env.split(",") if network.strip()]
 
+# Scan source configuration: env, netbox, or mixed
+scan_source = os.getenv("SCAN_SOURCE", "env").strip().lower()
+netbox_prefix_status = os.getenv("NETBOX_PREFIX_STATUS", "").strip().lower()
+
 # NetBox configuration
 netbox_url = os.getenv("NETBOX_URL", "https://netbox.xxxxx.xx/")
 netbox_token = os.getenv("NETBOX_TOKEN", "xxxxx")
@@ -26,6 +30,27 @@ netbox = pynetbox.api(url=netbox_url, token=netbox_token, ssl_verify=ssl_verify)
 
 tenant = os.getenv("TENANT", "Xxxxx Praha")
 
+
+def load_networks_from_netbox():
+    print("Loading networks from NetBox...")
+    prefixes = netbox.ipam.prefixes.filter(status=netbox_prefix_status) if netbox_prefix_status else netbox.ipam.prefixes.all()
+    networks_from_netbox = []
+    for prefix in prefixes:
+        address = getattr(prefix, 'prefix', None)
+        if address:
+            networks_from_netbox.append(address)
+            print(f"Found NetBox prefix: {address}")
+    return networks_from_netbox
+
+
+if scan_source == 'netbox':
+    networks = load_networks_from_netbox()
+elif scan_source == 'mixed':
+    networks = networks + load_networks_from_netbox()
+
+if not networks:
+    raise ValueError('No networks configured to scan. Set NETWORKS or SCAN_SOURCE to include NetBox prefixes.')
+
 def scan_network(network):
     print(f"Scanning network: {network}")
     nm.scan(hosts=network, arguments='-p 1-32768 -T4 --host-timeout 2m')  # Adding a host-timeout of 2 minutes