AC56U

=======Original Build (purchased in 2014)=======

-3.0.0.4.374_158-g36ce605 factory firmware and bl_version=1.0.2.3

NAND device: 128 MiB (AMD NAND 3,3V 8-bit) Manufacturer ID: 0x01, Chip ID: 0xf1

RAM: 256 MiB DDR3-1066 (ESMT M15F2G16128A)

CPU1: Broadcom BCM4708A0 (800 MHz, 2 cores)

CFE 512 KB, NVRAM 64 KB

Stock FW OS: Linux Kernel 2.6.36

=======2013 Builds=======

-3.0.0.4.374.134 (2013/09/03) - download

-3.0.0.4.374.291 (2013/10/28) - download

-3.0.0.4.374.339 (2013/11/11) - download

-3.0.0.4.374.501 (2013/12/20) - download, BETA

=======2014 Builds=======

-3.0.0.4.374.542 (2014/01/03) - download

-3.0.0.4.374.583 (2014/01/17) - download, BETA

-3.0.0.4.374.4422 (2014/02/13) - download

-3.0.0.4.374.4561 (2014/02/21) - download, wl driver Feb 20 2014 20:00:06 6.37.14.73 (r448163), (purchased router)

-3.0.0.4.374.5656 (2014/04/24) - download, wl driver Apr 21 2014 06:55:38 6.37.14.86 (r456083) NEW, improved wifi driver, last fw with ability to increase TX Power to 200mW

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-3.0.0.4.376.1665 (2014/09/23) - download, wl driver Jul 16 2014 23:18:55 6.37.14.86 (r456083), Network Map UI updated (CPU and RAM usage status), rootfs increased to 64MB, TX Power limited to 80mW (100%)

-3.0.0.4.376.3602 (2014/11/07) - download, for US and TW only

-3.0.0.4.376.3657 (2014/12/23) - download, wl driver Nov 10 2014 19:05:05 6.37.14.86 (r456083)

=======2015 Builds=======

-3.0.0.4.376.3754 (2015/01/12) - download, wl driver Jan 10 2015 16:44:28 6.37.14.86 (r456083)

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-3.0.0.4.378.4376 (2015/02/25) - download, REMOVED, wl driver Feb 23 2015 19:08:20 6.37.14.86 (r456083), previously AC68U only, WIP

-3.0.0.4.378.4585 (2015/03/12) - download, wl driver Mar 4 2015 13:47:33 6.37.14.86 (r456083)

-3.0.0.4.378.6117 (2015/06/02) - download, BETA, REMOVED, wl driver Mar 30 2015 06:53:57 6.37.14.105 (r485445) NEW, thread, new login page

-3.0.0.4.378.9135 (2015/10/02) - download, wl driver Sep 23 2015 13:18:39 6.37.14.105 (r485445), SNB, changelog for 378.4585 -> 378.8258 on AC68U page, autofill password on login page fixed

-3.0.0.4.378.9313 (2015/11/06) - download, wl driver Oct 27 2015 21:38:26 6.37.14.105 (r485445), ASUS Router app for iOS, Cloudcheck app support to enable ASSIA agent (how to disable),

-3.0.0.4.378.9383 (2015/12/11) - download, wl driver Dec 6 2015 13:08:12 6.37.14.105 (r485445),

-3.0.0.4.378.9459 (2015/12/25) - download, REMOVED and re-released on 2015/12/29, it had only 0.25KB

-3.0.0.4.378.9459 (2015/12/29) - download, wl driver Dec 22 2015 00:15:48 6.37.14.105 (r485445),

=======2016 Builds=======

-3.0.0.4.378.9529 (2016/03/10) - download, wl driver Jan 15 2016 04:41:21 6.37.14.105 (r485445), AC3200 thread, AC87U thread, 

-9.0.0.4.380.2695 (2016/03/28) - download, BETA, wl driver Mar 21 2016 17:53:41 6.37.14.126 (r561982) NEW, AC87U thread, AC68U thread, (3.0.0.4.380.858 + 380.1031, 380 changes, slower speed for 1Gbps connections)

-3.0.0.4.380.3264 (2016/05/27) - download, REMOVED (re-released on 2017/01/19), wl driver ?, ASUS firmware will change the verification method / FCC rules, 

-3.0.0.4.380.3831 (2016/07/08) - download, http://www.snbforums.com/threads/rt-ac68u-version-3-0-0-4-380-3831.33527/

-3.0.0.4.380.4005 (2016/09/08) - download, http://www.snbforums.com/threads/asus-firmware-version-3-0-0-4-380-4005-3-0-0-4-380_4005.34651/

-9.0.0.4.382.2469 (?) - download, BETA, http://www.snbforums.com/threads/r-ac87u-new-branch-382.33758/

-3.0.0.4.380.4180 (?) - download, http://www.snbforums.com/threads/email-from-asus-about-firmware-update-to-registered-users.36934/, IPv6 issue, 

=======2017 Builds=======

-3.0.0.4.380.3264 (2017/01/19) - download, wl driver ?, ASUS firmware will change the verification method / FCC rules,

-3.0.0.4.380.7266 (2017/02/14) - download, wl driver ?, AC56U, AC68U, AC87U, AC88U, AC5300, N66U, AC1900P, possibly fixed slow speed for 1Gbps connections

-3.0.0.4.380.7378 (2017/04/24) - download, wl driver ?, AC56U, AC68U, AC87U, AC5300, AC3200, N66U, AC66U, WPS issues (1, 2, 3), WDS page crash, 

-3.0.0.4.380.7743 (2017/06/16) - download, wl driver ?, AC56U, AC68U, AC87U, AC88U, AC5300, AC3200, N66U, AC66U, AC1900P, (slow PPPoE WAN speed/performance, no NAT acceleration), 

-9.0.0.4.382.16351 - download, BETA (not released for AC56U), AiMesh aka AMAS (ASUS multiple Access-point system), slow PPPoE speed as NAT Acceleration is disabled by Ai Protection engine, increased RAM usage, 

-3.0.0.4.382.18991 (2017/12/22) - download, wl driver ?, AC56U, AC68U, AC87U, AC88U, AC5300, AC3100, AC3200, N66U, AC66U, AC1900P, new feature: HDD Hibernation (1, 2, 3, 4, 5), added IPSec VPN server, 

=======2018 Builds=======

-3.0.0.4.384.10007 (2018/01/02) - download (not released for AC56U), wl driver ?, AC56U, AC68U, AC87U, AC88U, AC5300, AC3100, AC3200, N66U, AC66U, AC1900P, AiMesh (centralized management), Samba issues, CTF FA mode issue, 

-3.0.0.4.382.50010 (2018/01/25) - download, wl driver ?, AC56U, AC68U, AC87U, AC88U, AC5300, AC3100, AC3200, N66U, AC66U, AC1900P, from changelog: Fixed CTF related issues, 

-3.0.0.4.384.20379 (2018/02/13) - download (not released for AC56U), wl driver ?, AC56U, AC68U, AC87U, AC88U, AC5300, AC3100, AC3200, N66U, AC66U, AC1900P, AiMesh for AC56U?, 

-3.0.0.4.382.50624 (2018/06/01) - download, wl driver ?, AC56U, AC68U, AC87U, AC86U, AC88U, AC5300, AC3100, AC3200, N66U, AC66U, AC1900P, 

// AC56U support EOL (End of Life) - https://www.snbforums.com/threads/beta-asuswrt-merlin-384-8-beta-is-now-available.49908/page-3#post-444118

=======2019 Builds=======

-9.0.0.4.384.6396 - download, BETA (not released for AC56U), AX88U, OFDMA and WPA3 support, 

-3.0.0.4.382.51634 (2019/05/17) - download, wl driver ?, AC56U, AC68U, AC87U, AC86U, AC88U, AC5300, AC3100, AC3200, N66U, AC66U, AC1900P, 

-3.0.0.4.382.51641 (2019/11/05) - download, wl driver ?, AC56U, AC68U, AC87U, AC86U, AC88U, AC5300, AC3100, AC3200, N66U, AC66U, AC1900P, 

EOL (End-of-life product list ): https://www.asus.com/event/network/eol-product/