public static boolean isValidUnassignedAddress(@NonNull final byte[] address) {
        if (!isAddressInRange(address)) {
            return false;
        }
        return isValidUnassignedAddress(MeshParserUtils.unsignedBytesToInt(address[0], address[1]));
    }
Validates an unassigned address

@param address 16-bit address
@return true if the address is a valid unassigned address or false otherwise
mesh/src/main/java/no/nordicsemi/android/mesh/utils/MeshAddress.java