diff --git a/airos/airos8.py b/airos/airos8.py
index c5086c8..f073fbf 100644
--- a/airos/airos8.py
+++ b/airos/airos8.py
@@ -4,6 +4,7 @@
 
 import json
 import logging
+from typing import Any
 from urllib.parse import urlparse
 
 import aiohttp
@@ -190,6 +191,38 @@ async def login(self) -> bool:
             _LOGGER.exception("Error during login")
             raise DeviceConnectionError from err
 
+    def derived_data(
+        self, response: dict[str, Any] | None = None
+    ) -> dict[str, Any] | None:
+        """Add derived data to the device response."""
+        addresses = {}
+        interface_order = ["br0", "eth0", "ath0"]
+
+        interfaces = response.get("interfaces", [])
+
+        # No interfaces, no mac, no usability
+        if not interfaces:
+            raise KeyDataMissingError from None
+
+        for interface in interfaces:
+            if interface["enabled"]:  # Only consider if enabled
+                addresses[interface["ifname"]] = interface["hwaddr"]
+
+        for interface in interface_order:
+            if interface in addresses:
+                response["derived"] = {
+                    "mac": addresses[interface],
+                    "mac_interface": interface,
+                }
+                return response
+
+        # Fallback take fist alternate interface found
+        response["derived"] = {
+            "mac": interfaces[0]["hwaddr"],
+            "mac_interface": interfaces[0]["ifname"],
+        }
+        return response
+
     async def status(self) -> AirOSData:
         """Retrieve status from the device."""
         if not self.connected:
@@ -211,7 +244,8 @@ async def status(self) -> AirOSData:
                         response_text = await response.text()
                         response_json = json.loads(response_text)
                         try:
-                            airos_data = AirOSData.from_dict(response_json)
+                            adjusted_json = self.derived_data(response_json)
+                            airos_data = AirOSData.from_dict(adjusted_json)
                         except (MissingField, InvalidFieldValue) as err:
                             _LOGGER.exception("Failed to deserialize AirOS data")
                             raise KeyDataMissingError from err
diff --git a/airos/data.py b/airos/data.py
index 0dc69a5..d969293 100644
--- a/airos/data.py
+++ b/airos/data.py
@@ -427,6 +427,14 @@ class GPSMain:
     fix: int
 
 
+@dataclass
+class Derived:
+    """Contain custom data generated by this module."""
+
+    mac: str  # Base device MAC address (i.e. eth0)
+    mac_interface: str  # Interface derived from
+
+
 @dataclass
 class AirOS8Data(DataClassDictMixin):
     """Dataclass for AirOS v8 devices."""
@@ -443,3 +451,4 @@ class AirOS8Data(DataClassDictMixin):
     ntpclient: Any
     unms: UnmsStatus
     gps: GPSMain
+    derived: Derived
diff --git a/fixtures/sta-ptp.json b/fixtures/sta-ptp.json
index ba78d08..a0ce69c 100644
--- a/fixtures/sta-ptp.json
+++ b/fixtures/sta-ptp.json
@@ -1 +1 @@
-{"chain_names":[{"number":1,"name": "Chain 0"},{"number":2,"name": "Chain 1"}],"host":{"hostname": "NanoStation 5AC sta name","device_id": "d4f4cdf82961e619328a8f72f8d7653b","uptime":265375,"power_time":268567,"time": "2025-06-23 23:14:49","timestamp":2668800167,"fwversion": "v8.7.17","devmodel": "NanoStation 5AC loco","netrole": "bridge","loadavg":0.359863,"totalram":63447040,"freeram":16105472,"temperature":0,"cpuload":44.000000,"height":2},"genuine": "/images/genuine.png","services":{"dhcpc":false,"dhcpd":false,"dhcp6d_stateful":false,"pppoe":false,"airview":2},"firewall":{"iptables":false,"ebtables":false,"ip6tables":false,"eb6tables":false},"portfw":false,"wireless":{"essid": "DemoSSID","mode": "sta-ptp","ieeemode": "AUTO","band":2,"compat_11n":0,"hide_essid":0,"apmac":"01:23:45:67:89:CD","antenna_gain":13,"frequency":5500,"center1_freq":5530,"dfs":1,"distance":0,"security": "WPA2","noisef":-89,"txpower":-4,"aprepeater":false,"rstatus":5,"chanbw":80,"rx_chainmask":3,"tx_chainmask":3,"nol_state":0,"nol_timeout":0,"cac_state":0,"cac_timeout":0,"rx_idx":9,"rx_nss":2,"tx_idx":8,"tx_nss":2,"throughput":{"tx":12014,"rx":267},"service":{"time":267250,"link":266051},"polling":{"cb_capacity":586950,"dl_capacity":647400,"ul_capacity":526500,"use":46,"tx_use":40,"rx_use":6,"atpc_status":2,"fixed_frame":false,"gps_sync":false,"ff_cap_rep":false},"count":1,"sta":[{"mac":"01:23:45:67:89:CD","lastip":"192.168.1.3","signal":-58,"rssi":38,"noisefloor":-89,"chainrssi":[33,37,0],"tx_idx":8,"rx_idx":9,"tx_nss":2,"rx_nss":2,"tx_latency":0,"distance":1,"tx_packets":0,"tx_lretries":0,"tx_sretries":0,"uptime":170335,"dl_signal_expect":-45,"ul_signal_expect":-59,"cb_capacity_expect":658000,"dl_capacity_expect":692000,"ul_capacity_expect":624000,"dl_rate_expect":9,"ul_rate_expect":8,"dl_linkscore":93,"ul_linkscore":84,"dl_avg_linkscore":93,"ul_avg_linkscore":87,"tx_ratedata":[14,4,372,2223,4708,4037,8142,486840,29437014,24752069],"stats":{"rx_bytes":3622839202,"rx_packets":52999540,"rx_pps":446,"tx_bytes":212303079651,"tx_packets":149832292,"tx_pps":0},"airmax":{"actual_priority":0,"beam":0,"desired_priority":0,"cb_capacity":586950,"dl_capacity":647400,"ul_capacity":526500,"atpc_status":2,"rx":{"usage":6,"cinr":31,"evm":[[30,32,30,29,33,31,29,33,31,31,30,33,34,33,31,33,32,32,31,29,31,30,32,31,30,29,32,31,32,31,31,32,29,31,29,30,32,32,31,32,32,33,31,28,29,31,31,33,32,33,32,32,32,31,33,29,27,31,28,29,31,31,34,28],[39,39,39,39,39,41,39,39,39,39,39,39,38,39,39,39,39,39,39,39,40,39,39,40,39,39,39,40,39,40,39,39,39,39,39,38,39,39,39,39,39,39,40,39,39,40,39,38,39,39,39,39,39,39,39,39,39,39,39,39,38,39,39,39]]},"tx":{"usage":40,"cinr":31,"evm":[[32,31,30,26,32,32,31,28,33,32,32,32,31,31,31,29,30,32,30,27,34,31,31,30,32,29,31,29,31,33,31,31,32,30,31,34,33,31,30,31,30,31,31,32,31,30,33,31,30,31,27,31,30,30,30,30,30,29,32,34,31,30,28,30],[35,35,37,36,36,35,36,36,37,36,37,37,36,36,36,36,36,36,36,36,37,37,36,36,37,36,35,35,37,36,36,37,36,37,36,36,37,36,36,35,36,36,36,36,36,37,37,37,36,37,35,36,36,36,36,37,37,36,36,36,36,36,36,36]]}},"last_disc":1,"remote":{"age":2,"device_id": "03aa0d0b40fed0a47088293584ef4418","hostname": "NanoStation 5AC ap name","platform": "NanoStation 5AC loco","version": "WA.ar934x.v8.7.17.48152.250620.2132","time": "2025-06-23 23:07:34","cpuload":5.050500,"temperature":0,"totalram":63447040,"freeram":16633856,"netrole": "bridge","mode": "ap-ptp","sys_id":"0xe7fa","tx_throughput":314,"rx_throughput":10548,"uptime":264941,"power_time":268736,"compat_11n":0,"signal":-60,"rssi":36,"noisefloor":-89,"tx_power":-3,"distance":1,"rx_chainmask":3,"chainrssi":[35,31,0],"tx_ratedata":[175,4,47,200,673,158,163,138,68926,19583506],"tx_bytes":5267487876,"rx_bytes":207021597130,"antenna_gain":13,"cable_loss":0,"height":3,"ethlist":[{"ifname": "eth0","enabled":true,"plugged":true,"duplex":true,"speed":1000,"snr":[30,30,30,30],"cable_len":18}],"ipaddr":["192.168.1.3"],"ip6addr":["fe80::eea:14ff:fea4:7b8"],"gps":{"lat": "52.379894","lon": "4.901608","fix":0},"oob":false,"unms":{"status":0},"airview":2,"service":{"time":267234,"link":266056}}}],"sta_disconnected":[]},"interfaces":[{"ifname": "eth0","hwaddr":"0C:EA:14:A5:08:06","enabled":true,"mtu":1500,"status":{"plugged":true,"tx_bytes":4975926283,"rx_bytes":206979884583,"tx_packets":73329864,"rx_packets":185401454,"tx_errors":0,"rx_errors":0,"tx_dropped":0,"rx_dropped":0,"ipaddr":"0.0.0.0","speed":1000,"duplex":true,"snr":[30,30,30,30],"cable_len":14}},{"ifname": "ath0","hwaddr":"0C:EA:14:A4:08:06","enabled":true,"mtu":1500,"status":{"plugged":false,"tx_bytes":212398179151,"rx_bytes":3625607638,"tx_packets":149906916,"rx_packets":53038237,"tx_errors":0,"rx_errors":0,"tx_dropped":34,"rx_dropped":0,"ipaddr":"0.0.0.0","speed":0,"duplex":false}},{"ifname": "br0","hwaddr":"0C:EA:14:A4:08:06","enabled":true,"mtu":1500,"status":{"plugged":true,"tx_bytes":143856488,"rx_bytes":198175800,"tx_packets":204749,"rx_packets":1753443,"tx_errors":0,"rx_errors":0,"tx_dropped":0,"rx_dropped":0,"ipaddr":"192.168.1.3","ip6addr":[{"addr":"fe80::eea:14ff:fea4:806","plen":64}],"speed":0,"duplex":false}}],"provmode":{},"ntpclient":{},"unms":{"status":0},"gps":{"lat":52.379894,"lon":4.901608,"fix":0}}
+{"chain_names":[{"number":1,"name": "Chain 0"},{"number":2,"name": "Chain 1"}],"host":{"hostname": "NanoStation 5AC sta name","device_id": "d4f4cdf82961e619328a8f72f8d7653b","uptime":265375,"power_time":268567,"time": "2025-06-23 23:14:49","timestamp":2668800167,"fwversion": "v8.7.17","devmodel": "NanoStation 5AC loco","netrole": "bridge","loadavg":0.359863,"totalram":63447040,"freeram":16105472,"temperature":0,"cpuload":44.000000,"height":2},"genuine": "/images/genuine.png","services":{"dhcpc":false,"dhcpd":false,"dhcp6d_stateful":false,"pppoe":false,"airview":2},"firewall":{"iptables":false,"ebtables":false,"ip6tables":false,"eb6tables":false},"portfw":false,"wireless":{"essid": "DemoSSID","mode": "sta-ptp","ieeemode": "AUTO","band":2,"compat_11n":0,"hide_essid":0,"apmac":"01:23:45:67:89:AB","antenna_gain":13,"frequency":5500,"center1_freq":5530,"dfs":1,"distance":0,"security": "WPA2","noisef":-89,"txpower":-4,"aprepeater":false,"rstatus":5,"chanbw":80,"rx_chainmask":3,"tx_chainmask":3,"nol_state":0,"nol_timeout":0,"cac_state":0,"cac_timeout":0,"rx_idx":9,"rx_nss":2,"tx_idx":8,"tx_nss":2,"throughput":{"tx":12014,"rx":267},"service":{"time":267250,"link":266051},"polling":{"cb_capacity":586950,"dl_capacity":647400,"ul_capacity":526500,"use":46,"tx_use":40,"rx_use":6,"atpc_status":2,"fixed_frame":false,"gps_sync":false,"ff_cap_rep":false},"count":1,"sta":[{"mac":"01:23:45:67:89:CD","lastip":"192.168.1.3","signal":-58,"rssi":38,"noisefloor":-89,"chainrssi":[33,37,0],"tx_idx":8,"rx_idx":9,"tx_nss":2,"rx_nss":2,"tx_latency":0,"distance":1,"tx_packets":0,"tx_lretries":0,"tx_sretries":0,"uptime":170335,"dl_signal_expect":-45,"ul_signal_expect":-59,"cb_capacity_expect":658000,"dl_capacity_expect":692000,"ul_capacity_expect":624000,"dl_rate_expect":9,"ul_rate_expect":8,"dl_linkscore":93,"ul_linkscore":84,"dl_avg_linkscore":93,"ul_avg_linkscore":87,"tx_ratedata":[14,4,372,2223,4708,4037,8142,486840,29437014,24752069],"stats":{"rx_bytes":3622839202,"rx_packets":52999540,"rx_pps":446,"tx_bytes":212303079651,"tx_packets":149832292,"tx_pps":0},"airmax":{"actual_priority":0,"beam":0,"desired_priority":0,"cb_capacity":586950,"dl_capacity":647400,"ul_capacity":526500,"atpc_status":2,"rx":{"usage":6,"cinr":31,"evm":[[30,32,30,29,33,31,29,33,31,31,30,33,34,33,31,33,32,32,31,29,31,30,32,31,30,29,32,31,32,31,31,32,29,31,29,30,32,32,31,32,32,33,31,28,29,31,31,33,32,33,32,32,32,31,33,29,27,31,28,29,31,31,34,28],[39,39,39,39,39,41,39,39,39,39,39,39,38,39,39,39,39,39,39,39,40,39,39,40,39,39,39,40,39,40,39,39,39,39,39,38,39,39,39,39,39,39,40,39,39,40,39,38,39,39,39,39,39,39,39,39,39,39,39,39,38,39,39,39]]},"tx":{"usage":40,"cinr":31,"evm":[[32,31,30,26,32,32,31,28,33,32,32,32,31,31,31,29,30,32,30,27,34,31,31,30,32,29,31,29,31,33,31,31,32,30,31,34,33,31,30,31,30,31,31,32,31,30,33,31,30,31,27,31,30,30,30,30,30,29,32,34,31,30,28,30],[35,35,37,36,36,35,36,36,37,36,37,37,36,36,36,36,36,36,36,36,37,37,36,36,37,36,35,35,37,36,36,37,36,37,36,36,37,36,36,35,36,36,36,36,36,37,37,37,36,37,35,36,36,36,36,37,37,36,36,36,36,36,36,36]]}},"last_disc":1,"remote":{"age":2,"device_id": "03aa0d0b40fed0a47088293584ef4418","hostname": "NanoStation 5AC ap name","platform": "NanoStation 5AC loco","version": "WA.ar934x.v8.7.17.48152.250620.2132","time": "2025-06-23 23:07:34","cpuload":5.050500,"temperature":0,"totalram":63447040,"freeram":16633856,"netrole": "bridge","mode": "ap-ptp","sys_id":"0xe7fa","tx_throughput":314,"rx_throughput":10548,"uptime":264941,"power_time":268736,"compat_11n":0,"signal":-60,"rssi":36,"noisefloor":-89,"tx_power":-3,"distance":1,"rx_chainmask":3,"chainrssi":[35,31,0],"tx_ratedata":[175,4,47,200,673,158,163,138,68926,19583506],"tx_bytes":5267487876,"rx_bytes":207021597130,"antenna_gain":13,"cable_loss":0,"height":3,"ethlist":[{"ifname": "eth0","enabled":true,"plugged":true,"duplex":true,"speed":1000,"snr":[30,30,30,30],"cable_len":18}],"ipaddr":["192.168.1.3"],"ip6addr":["fe80::eea:14ff:fea4:7b8"],"gps":{"lat": "52.379894","lon": "4.901608","fix":0},"oob":false,"unms":{"status":0},"airview":2,"service":{"time":267234,"link":266056}}}],"sta_disconnected":[]},"interfaces":[{"ifname": "eth0","hwaddr":"01:23:45:67:89:CD","enabled":true,"mtu":1500,"status":{"plugged":true,"tx_bytes":4975926283,"rx_bytes":206979884583,"tx_packets":73329864,"rx_packets":185401454,"tx_errors":0,"rx_errors":0,"tx_dropped":0,"rx_dropped":0,"ipaddr":"0.0.0.0","speed":1000,"duplex":true,"snr":[30,30,30,30],"cable_len":14}},{"ifname": "ath0","hwaddr":"01:23:45:67:89:CD","enabled":true,"mtu":1500,"status":{"plugged":false,"tx_bytes":212398179151,"rx_bytes":3625607638,"tx_packets":149906916,"rx_packets":53038237,"tx_errors":0,"rx_errors":0,"tx_dropped":34,"rx_dropped":0,"ipaddr":"0.0.0.0","speed":0,"duplex":false}},{"ifname": "br0","hwaddr":"01:23:45:67:89:CD","enabled":true,"mtu":1500,"status":{"plugged":true,"tx_bytes":143856488,"rx_bytes":198175800,"tx_packets":204749,"rx_packets":1753443,"tx_errors":0,"rx_errors":0,"tx_dropped":0,"rx_dropped":0,"ipaddr":"192.168.1.3","ip6addr":[{"addr":"fe80::eea:14ff:fea4:806","plen":64}],"speed":0,"duplex":false}}],"provmode":{},"ntpclient":{},"unms":{"status":0},"gps":{"lat":52.379894,"lon":4.901608,"fix":0}}
diff --git a/pyproject.toml b/pyproject.toml
index 66800dc..d597ad1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name            = "airos"
-version         = "0.2.0"
+version         = "0.2.1"
 license         = "MIT"
 description     = "Ubiquity airOS module(s) for Python 3."
 readme          = "README.md"
diff --git a/tests/test_stations.py b/tests/test_stations.py
index 029afcd..a523b03 100644
--- a/tests/test_stations.py
+++ b/tests/test_stations.py
@@ -59,6 +59,7 @@ async def test_ap_object(airos_device, base_url, mode):
 
         # Verify the fixture returns the correct mode
         assert status.wireless.mode.value == mode
+        assert status.derived.mac_interface == "br0"
 
 
 @pytest.mark.asyncio