diff --git a/src/core/api/link_raw_api.cpp b/src/core/api/link_raw_api.cpp
index cf8f0caf0..29ab7307e 100644
--- a/src/core/api/link_raw_api.cpp
+++ b/src/core/api/link_raw_api.cpp
@@ -137,16 +137,12 @@ exit:
 
 otError otLinkRawSrcMatchAddExtEntry(otInstance *aInstance, const otExtAddress *aExtAddress)
 {
-    Mac::ExtAddress address;
-    Error           error    = kErrorNone;
-    Instance       &instance = AsCoreType(aInstance);
-
-    AssertPointerIsNotNull(aExtAddress);
+    Error     error    = kErrorNone;
+    Instance &instance = AsCoreType(aInstance);
 
     VerifyOrExit(instance.Get<Mac::LinkRaw>().IsEnabled(), error = kErrorInvalidState);
 
-    address.Set(aExtAddress->m8, Mac::ExtAddress::kReverseByteOrder);
-    error = instance.Get<Radio>().AddSrcMatchExtEntry(address);
+    error = instance.Get<Radio>().AddSrcMatchExtEntry(AsCoreType(aExtAddress));
 
 exit:
     return error;
@@ -166,16 +162,12 @@ exit:
 
 otError otLinkRawSrcMatchClearExtEntry(otInstance *aInstance, const otExtAddress *aExtAddress)
 {
-    Mac::ExtAddress address;
-    Error           error    = kErrorNone;
-    Instance       &instance = AsCoreType(aInstance);
-
-    AssertPointerIsNotNull(aExtAddress);
+    Error     error    = kErrorNone;
+    Instance &instance = AsCoreType(aInstance);
 
     VerifyOrExit(instance.Get<Mac::LinkRaw>().IsEnabled(), error = kErrorInvalidState);
 
-    address.Set(aExtAddress->m8, Mac::ExtAddress::kReverseByteOrder);
-    error = instance.Get<Radio>().ClearSrcMatchExtEntry(address);
+    error = instance.Get<Radio>().ClearSrcMatchExtEntry(AsCoreType(aExtAddress));
 
 exit:
     return error;
diff --git a/src/core/mac/sub_mac.cpp b/src/core/mac/sub_mac.cpp
index fbe243d75..c718e6fe0 100644
--- a/src/core/mac/sub_mac.cpp
+++ b/src/core/mac/sub_mac.cpp
@@ -180,13 +180,8 @@ exit:
 
 void SubMac::SetExtAddress(const ExtAddress &aExtAddress)
 {
-    ExtAddress address;
-
     mExtAddress = aExtAddress;
-
-    // Reverse the byte order before setting on radio.
-    address.Set(aExtAddress.m8, ExtAddress::kReverseByteOrder);
-    Get<Radio>().SetExtendedAddress(address);
+    Get<Radio>().SetExtendedAddress(aExtAddress);
 
     LogDebg("RadioExtAddress: %s", mExtAddress.ToString().AsCString());
 }
diff --git a/src/core/radio/radio.cpp b/src/core/radio/radio.cpp
index b7f419f59..846481dc4 100644
--- a/src/core/radio/radio.cpp
+++ b/src/core/radio/radio.cpp
@@ -78,10 +78,13 @@ void Radio::Init(void)
 
 void Radio::SetExtendedAddress(const Mac::ExtAddress &aExtAddress)
 {
-    otPlatRadioSetExtendedAddress(GetInstancePtr(), &aExtAddress);
+    Mac::ExtAddress address;
+
+    address.Set(aExtAddress.m8, Mac::ExtAddress::kReverseByteOrder);
+    otPlatRadioSetExtendedAddress(GetInstancePtr(), &address);
 
 #if (OPENTHREAD_MTD || OPENTHREAD_FTD) && OPENTHREAD_CONFIG_OTNS_ENABLE
-    Get<Utils::Otns>().EmitExtendedAddress(aExtAddress);
+    Get<Utils::Otns>().EmitExtendedAddress(address);
 #endif
 }
 
@@ -94,6 +97,13 @@ void Radio::SetShortAddress(Mac::ShortAddress aShortAddress)
 #endif
 }
 
+Error Radio::AddSrcMatchExtEntry(const Mac::ExtAddress &aExtAddress)
+{
+    Mac::ExtAddress address;
+
+    address.Set(aExtAddress.m8, Mac::ExtAddress::kReverseByteOrder);
+    return otPlatRadioAddSrcMatchExtEntry(GetInstancePtr(), &address);
+}
 Error Radio::Transmit(Mac::TxFrame &aFrame)
 {
 #if (OPENTHREAD_MTD || OPENTHREAD_FTD) && OPENTHREAD_CONFIG_OTNS_ENABLE
diff --git a/src/core/radio/radio.hpp b/src/core/radio/radio.hpp
index 8bf699393..9943c74c4 100644
--- a/src/core/radio/radio.hpp
+++ b/src/core/radio/radio.hpp
@@ -319,7 +319,7 @@ public:
     /**
      * Sets the Extended Address for address filtering.
      *
-     * @param[in] aExtAddress  The IEEE 802.15.4 Extended Address stored in little-endian byte order.
+     * @param[in] aExtAddress  The IEEE 802.15.4 Extended Address stored in big-endian byte order.
      */
     void SetExtendedAddress(const Mac::ExtAddress &aExtAddress);
 
@@ -636,7 +636,7 @@ public:
     /**
      * Adds an extended address to the source address match table.
      *
-     * @param[in]  aExtAddress  The extended address to be added stored in little-endian byte order.
+     * @param[in]  aExtAddress  The extended address to be added stored in big-endian byte order.
      *
      * @retval kErrorNone     Successfully added extended address to the source match table.
      * @retval kErrorNoBufs   No available entry in the source match table.
@@ -656,7 +656,7 @@ public:
     /**
      * Removes an extended address from the source address match table.
      *
-     * @param[in]  aExtAddress  The extended address to be removed stored in little-endian byte order.
+     * @param[in]  aExtAddress  The extended address to be removed stored in big-endian byte order.
      *
      * @retval kErrorNone       Successfully removed the extended address from the source match table.
      * @retval kErrorNoAddress  The extended address is not in source address match table.
@@ -981,11 +981,6 @@ inline Error Radio::AddSrcMatchShortEntry(Mac::ShortAddress aShortAddress)
     return otPlatRadioAddSrcMatchShortEntry(GetInstancePtr(), aShortAddress);
 }
 
-inline Error Radio::AddSrcMatchExtEntry(const Mac::ExtAddress &aExtAddress)
-{
-    return otPlatRadioAddSrcMatchExtEntry(GetInstancePtr(), &aExtAddress);
-}
-
 inline Error Radio::ClearSrcMatchShortEntry(Mac::ShortAddress aShortAddress)
 {
     return otPlatRadioClearSrcMatchShortEntry(GetInstancePtr(), aShortAddress);
diff --git a/src/core/thread/src_match_controller.cpp b/src/core/thread/src_match_controller.cpp
index 9c9cecad9..1347b6018 100644
--- a/src/core/thread/src_match_controller.cpp
+++ b/src/core/thread/src_match_controller.cpp
@@ -147,10 +147,7 @@ Error SourceMatchController::AddAddress(const Child &aChild)
     }
     else
     {
-        Mac::ExtAddress address;
-
-        address.Set(aChild.GetExtAddress().m8, Mac::ExtAddress::kReverseByteOrder);
-        error = Get<Radio>().AddSrcMatchExtEntry(address);
+        error = Get<Radio>().AddSrcMatchExtEntry(aChild.GetExtAddress());
 
         LogDebg("Adding addr: %s -- %s (%d)", aChild.GetExtAddress().ToString().AsCString(), ErrorToString(error),
                 error);
@@ -178,10 +175,7 @@ void SourceMatchController::ClearEntry(Child &aChild)
     }
     else
     {
-        Mac::ExtAddress address;
-
-        address.Set(aChild.GetExtAddress().m8, Mac::ExtAddress::kReverseByteOrder);
-        error = Get<Radio>().ClearSrcMatchExtEntry(address);
+        error = Get<Radio>().ClearSrcMatchExtEntry(aChild.GetExtAddress());
 
         LogDebg("Clearing addr: %s -- %s (%d)", aChild.GetExtAddress().ToString().AsCString(), ErrorToString(error),
                 error);