diff --git a/README.md b/README.md
index 51f11440..b68c44f8 100644
--- a/README.md
+++ b/README.md
@@ -120,6 +120,7 @@ wifi.status
 | `wifi clear` | Clear runtime creds (fall back to compile-time on next boot) |
 | `tcp on` / `tcp off` / `tcp status` | Control/query the TCP server |
 | `ble on` / `ble off` / `ble status` | Control/query Bluetooth |
+| `mac` | Show the device Wi-Fi and BLE MAC addresses (also `get mac`, `get wifi.mac`, `get ble.mac` in the app console or over USB serial) |
 | `ota check` | Ask the OTA server whether a newer build exists for this device |
 | `ota update` | Install that build over Wi-Fi (see [Update over Wi-Fi](#update-over-wi-fi)) |
 
diff --git a/examples/companion_radio/MyMesh.cpp b/examples/companion_radio/MyMesh.cpp
index 9b943206..1f21772e 100644
--- a/examples/companion_radio/MyMesh.cpp
+++ b/examples/companion_radio/MyMesh.cpp
@@ -12,6 +12,9 @@
 #ifdef ESP32
 #include <esp_system.h>          // esp_restart for the "bootloader" CLI command
 #include <soc/rtc_cntl_reg.h>    // RTC_CNTL_OPTION1_REG / FORCE_DOWNLOAD_BOOT
+#if __has_include(<esp_mac.h>)
+#include <esp_mac.h>             // esp_read_mac for the "mac" / "get mac" CLI commands
+#endif
 #endif
 #include <helpers/AdvertDataHelpers.h>
 #include <helpers/HttpOtaDisplayState.h>
@@ -227,7 +230,27 @@ static const char* kMeshcomodHelpMsg =
   "tcp status\n"
   "ble on\n"
   "ble off\n"
-  "ble status";
+  "ble status\n"
+  "mac";
+
+// Factory MAC of one ESP32 interface as "AA:BB:CC:DD:EE:FF", or "n/a" when the chip has no
+// such interface (ESP32-S2 has no Bluetooth) or this is not an ESP32. The address is read from
+// eFuse, so it is valid whether or not that radio is currently on.
+#ifdef ESP32
+static void formatDeviceMac(esp_mac_type_t type, char* out, size_t len) {
+  uint8_t m[6];
+  if (esp_read_mac(m, type) == ESP_OK) {
+    snprintf(out, len, "%02X:%02X:%02X:%02X:%02X:%02X", m[0], m[1], m[2], m[3], m[4], m[5]);
+  } else {
+    StrHelper::strncpy(out, "n/a", len);
+  }
+}
+static void getWifiMac(char* out, size_t len) { formatDeviceMac(ESP_MAC_WIFI_STA, out, len); }
+static void getBleMac(char* out, size_t len)  { formatDeviceMac(ESP_MAC_BT, out, len); }
+#else
+static void getWifiMac(char* out, size_t len) { StrHelper::strncpy(out, "n/a", len); }
+static void getBleMac(char* out, size_t len)  { StrHelper::strncpy(out, "n/a", len); }
+#endif
 
 #define MESHCOMOD_CMD_CACHE_SIZE 6
 struct MeshcomodCmdCacheEntry {
@@ -571,6 +594,14 @@ bool MyMesh::handleMeshcomodCommand(const char* text, int text_len) {
     pushMeshcomodReply(r);
     return true;
   }
+  if (isCmd(p, "mac")) {
+    char wifi[20], ble[20], r[64];
+    getWifiMac(wifi, sizeof wifi);
+    getBleMac(ble, sizeof ble);
+    snprintf(r, sizeof r, "wifi mac: %s\nble mac: %s", wifi, ble);
+    pushMeshcomodReply(r);
+    return true;
+  }
   if (isCmd(p, "advert.zerohop")) {
     pushMeshcomodReply(sendAdvert(false) ? "advert sent (zero-hop)" : "advert failed");
     return true;
@@ -4086,6 +4117,26 @@ bool MyMesh::handleCommand(const char* command, uint32_t sender_timestamp, char*
     return true;
   }
 
+  if (strcmp(command, "get wifi.mac") == 0) {
+    char mac[20];
+    getWifiMac(mac, sizeof(mac));
+    sprintf(reply, "> %s", mac);
+    return true;
+  }
+  if (strcmp(command, "get ble.mac") == 0) {
+    char mac[20];
+    getBleMac(mac, sizeof(mac));
+    sprintf(reply, "> %s", mac);
+    return true;
+  }
+  if (strcmp(command, "get mac") == 0) {
+    char wifi[20], ble[20];
+    getWifiMac(wifi, sizeof(wifi));
+    getBleMac(ble, sizeof(ble));
+    sprintf(reply, "> wifi=%s ble=%s", wifi, ble);
+    return true;
+  }
+
   if (strcmp(command, "get tz.offset") == 0 || memcmp(command, "set tz.offset ", 14) == 0) {
     strcpy(reply, "Error: unsupported");
     return true;
diff --git a/examples/companion_radio/ui-touch/UITask.cpp b/examples/companion_radio/ui-touch/UITask.cpp
index b423c54b..a450dad4 100644
--- a/examples/companion_radio/ui-touch/UITask.cpp
+++ b/examples/companion_radio/ui-touch/UITask.cpp
@@ -9124,6 +9124,7 @@ static const AdminCmdEntry k_term_cmds[] = {
   { "ver - firmware version",         "ver" },
   { "clock - show RTC time",          "clock" },
   { "status - device status",         "status" },
+  { "mac - wifi/ble MAC addresses",  "mac" },
   { "get - show radio params",        "get" },
   { "[ RADIO / MESH ]", nullptr },
   { "advert - flood advert",          "advert" },
@@ -9432,7 +9433,7 @@ static void termCmdExit() {
 static bool termIsCliKeyword(const char* word, size_t len) {
   static const char* kw[] = {
     "help", "ver", "version", "clock", "time", "status", "get", "set",
-    "advert", "advert.zerohop", "reboot", "wifi", "tcp", "ble", "ota",
+    "advert", "advert.zerohop", "reboot", "wifi", "tcp", "ble", "ota", "mac",
     "ok", "cancel",
   };
   for (const char* k : kw) {