10/26/2016 new driver models for direct download:681
D-link Dwa-643 5 stars review"The best driver WIKI ever! I wil keep coming back for sure."Eric Smalter, Boston, MA
Supported languages for D-link Dwa-643
Certifications for D-link Dwa-643
5 stars for D-link Dwa-643 "WOW! Finally my PC got up to speed!" Melany Kim 7/18/2015

Checking...for 10/26/2016 Updates

All drivers on are updated on daily basis.

However, a new version of D-link Dwa-643 might have been uploaded since our last site update.

D-link Dwa-643 Driver Download

Windows Compatibility for D-link Dwa-643 driver

D-link Dwa-643 Driver Details:

D-link Dwa-643 File Name:

D-link Dwa-643 Driver Version: 6778qNz.3

D-link Dwa-643 ZIP Size: 148.kb

Manufacturer: D-link

D-link Dwa-643 was fully scanned at: 10/21/2016
Scan Status: driver download scanOK

D-link Dwa-643 special revision for: Windows Vista Home Basic 64 bit, Windows 8 Enterprise 64 bit, Windows 7 Enterprise (Microsoft Windows NT) 32 bit, Windows 7 Home Basic 64 bit, Windows XP Media Center Edition 2003 32 bit, Windows Vista Business 64 bit, Windows 7 Professional 32 bit, Windows XP Media Center Edition 2004 64 bit, Windows XP Media Center Edition 32 bit, Windows 7 Home Premium 64 bit, Windows 7 Ultimate 32 bit

D-link Dwa-643 Download Stats:

Driver Uploaded: 9/17/2016

Direct Downloads: 362
Most Recent Download: 10/25/2016
Managed Downloads: 439
Most Recent Download: 10/24/2016
Download Mirrors: 4
Current Delay: 10 Seconds
Driver License: GNU

Direct Download Success Stats:

Reports Issued By 296/362 Users

Success Reported By 46/296 Users

Driver Download Score71/100

Driver Installation Score62/100

Overall preformance Score66/100

D-link Dwa-643 7 Thumbs Up7Thumbs
D-link Dwa-643 1 Thumbs Down1Thumbs
D-link Dwa-643 driver direct download was reported as adequate by a large percentage of our reporters, so it should be good to download and install.

Installation Manager Success Stats:

Reports Issued By 362/439 Users

Success Reported By 314/362 Users

Driver Download Score86/100

Driver Installation Score81/100

Overall preformance Score79/100

D-link Dwa-643 298 Thumbs Up298Thumbs
D-link Dwa-643 5 Thumbs Down5Thumbs
D-link Dwa-643 driver installation manager was reported as very satisfying by a large percentage of our reporters, so it is recommended to download and install.


1. Direct Download

Select your OS and press "Download".

This option requires basic OS understanding.
Select Your Operating System, download zipped files, and then proceed to
manually install them.
Recommended if D-link Dwa-643 is the only driver on your PC you wish to update.


2. Driver Installation Manager

This option requires no OS understanding.
Automatically scans your PC for the specific required version of D-link Dwa-643 + all other outdated drivers, and installs them all at once.

Please help us maintain a helpfull driver collection.
After downloading and installing D-link Dwa-643, or the driver installation manager, take a few minutes to send us a report:
* Only registered users can upload a report.

Don’t have a password?
Please register, and get one.

D-link Dwa-643 may sometimes be at fault for other drivers ceasing to function

These are the driver scans of 2 of our recent wiki members*

*Scans were performed on computers suffering from D-link Dwa-643 disfunctions.

Scan performed on 10/26/2016, Computer: Acer TravelMate 8531

Outdated or Corrupted drivers:7/20

Device/DriverStatusStatus DescriptionUpdated By Scanner
Intel(R) 82801GBM/GHM (ICH7-M Family) Serial ATA Storage Controller - 27C4Up To Date and Functioning
Mice And Touchpads
Logitech Logitech USB iFeel MouseUp To Date and Functioning
Logitech Logitech WheelMouse (USB)Up To Date and Functioning
Microsoft Microsoft Serial BallPointUp To Date and Functioning
Usb Devices
Realtek Realtek USB 3.0 Card ReaderOutdated
Intel(R) USB 3.0 HubUp To Date and Functioning
Cambridge Silicon Radio Generic Bluetooth RadioOutdated
Sound Cards And Media Devices
Hauppauge Multimedia Video ControllerOutdated
YUAN High-Tech Development Multimedia Video ControllerUp To Date and Functioning
Network Cards
Ericsson AB Ericsson H5321 gwUp To Date and Functioning
Microsoft HID KeyboardUp To Date and Functioning
Hard Disk Controller
VIA VIA Bus Master IDE Controller - 5324Up To Date and Functioning
Nokia Nokia 5230 USB LCIFCorrupted By D-link Dwa-643
SMSC SMSC IrCC - Fast Infrared PortUp To Date and Functioning
Cameras, Webcams And Scanners
Sonix USB Video DeviceOutdated
Video Cards
Intel Standard VGA Graphics AdapterUp To Date and Functioning
Input Devices
KME USB Human Interface DeviceCorrupted By D-link Dwa-643
Port Devices
Huawei Vodafone Mobile Broadband Secondary Port Modem (Huawei) (COM28)Corrupted By D-link Dwa-643
Sony Digital Flat Panel (1024x768)Up To Date and Functioning
Mobile Phones And Portable Devices
Acer NOKIAUp To Date and Functioning

Scan performed on 10/26/2016, Computer: IBM 8305S8U

Outdated or Corrupted drivers:6/18

Device/DriverStatusStatus DescriptionUpdated By Scanner
Intel Matrox Extio PCI Standard PCI-to-PCI BridgeOutdated
Mice And Touchpads
KYE HID mouseUp To Date and Functioning
VMware VMware USB Pointing DeviceOutdated
WheelMouse USB Advanced Wheel MouseUp To Date and Functioning
Usb Devices
Canon USB Printing SupportOutdated
Sound Cards And Media Devices
C-Media Multimedia Audio ControllerUp To Date and Functioning
Network Cards
Realtek Realtek RTL8168B/8111B-Familie-PCI-E-Gigabit-Ethernet-NIC (NDIS 6.20)Up To Date and Functioning
Microsoft Keyboard Device FilterUp To Date and Functioning
Hard Disk Controller
Intel Intel(r) 82801DB Ultra ATA Storage-Controller-24CAUp To Date and Functioning
Nokia Nokia 5230 USB PhonetUp To Date and Functioning
ENE ENE CB1410 Cardbus ControllerUp To Date and Functioning
Point Grey Research Texas Instruments 1394 OHCI Compliant Host ControllerOutdated
Cameras, Webcams And Scanners
Microsoft USB Video DeviceCorrupted By D-link Dwa-643
Video Cards
NVIDIA NVIDIA GeForce4 MX 440Up To Date and Functioning
Input Devices
Lenovo USB DeviceUp To Date and Functioning
Port Devices
MediaTek DA USB VCOM Port (COM11)Up To Date and Functioning
Sony Digital Flat Panel (1024x768)Corrupted By D-link Dwa-643
Mobile Phones And Portable Devices
Acer NOKIAUp To Date and Functioning
Driver ModelOriginal Upload DateLast ModificationDriver FileFile SizeCompatible Computer ModelsAvailabilty To Instalation Manager
D-link Dwa-643 2084010/8/201412/29/2015d-link_dwa-643-20840.exe79kbAcer Aspire 3810TZG, NEC PC-LG24NRBEL, TriGem AVERATEC, HP KZ771AA-UUZ, IBM 6221GE1, Toshiba SATELLITE L775-15N, IBM 2658MJJ, Packard Bell IMedia D9235, NEC PC-LL750NSB-YC, Sony SVS13A17GBB, Leading Edge LECQ43SOHO, Lenovo ThinkPad L512, Panasonic CF-SX2JE4DS, Gigabyte 946GM-S2, and more.
D-link Dwa-643 61.132011/25/201412/27/2015d-link_dwa-643-61.1320.exe34kbARLT Computer Produkte Quattro Power Station GTX 560, Leading Edge LECQ43SOHO, Sony VGN-TZ71B, Lenovo ThinkCentre Edge 71, HP P6563sc, Packard Bell IMEDIA 8006, LG LB50-CC34ZL, NEC PC-MJ29MLZ2JCSG, Toshiba SATELLITE C855-1NF, HP NS886AA-ABG p6130a, Compaq PG058AA-ABG SR1178A AN430, Fujitsu FMVFE90DBY, HP ProLiant DL360 G5, Fujitsu LifeBook A6120, HP P6-2202el, IBM 81712EU, and more.
D-link Dwa-643 2.1386811/29/201412/27/2015d-link_dwa-643-2.13868.exe59kbToshiba Dynabook BX/31L2, ASUS BM5295, Fujitsu FMVLX55M, Gateway M-7343U, HP HP 2000-425NR, Lenovo 6463Y3W, Acer AOA150p/BGW, NEC PC-MY30DEZCA, HP EP074AA-ABU, Pegatron C17B, Sony VGN-NS220TH, HP Presario R4000, HP Xy107et, HP 610-1110es, and more.
D-link Dwa-643 224899/13/201412/30/2015d-link_dwa-643-22489.exe38kbECS Z77H2-A2X Deluxe, HP KA856AA-ABF a6314.f, NEC EASYNOTE PB37R00002, OEGStone DB75EN, HP M7640n-ABA m7640, IBM 18669MG, Packard Bell OneTwo S3221, HP FL379AA-UUZ m9480ch, Samsung Q320/P320, Sony PCV-RZ104, Sony VGC-RC70S, HP GG020AA-AB3 g3085l, Gigabyte G33M-S2, Fujitsu FMVLRB50P, HP HP Compaq nw8440, IBM 2673CU6, HP DT212A-ABU M487.UK, and more.
D-link Dwa-643 C2.139891/2/201512/29/2015d-link_dwa-643-c2.13989.exe41kbIntel Crestline, Lenovo ThinkCentre M55, IBM IBM System x3400 M2 Server -[783734G, Haier T68 Series, HP HP Compaq nw8240, Fujitsu FMVF705BDR, Compaq Presario 7RPM11 195749-999, NEC PC-VJ22ERNTHGLB, Gateway E4252, Fujitsu PRIMERGY RX100 S6, Compaq DD377A-ABX 6680 FI110, Sony VPCF135FG, and more.
D-link Dwa-643 NM798AA-UUZ IQ532ch, Packard Bell TS44HR, Fujitsu FMVA42EWKS, Mustek KDZ68DBM, Toshiba NB100/HF, HP GX606AA-UUW, HP PX643AA-ABZ, Systemax Charity PC 2010, MSI GT60 2OJWS, Gateway T-1629, HP Pavilion zd8000, Lenovo ThinkPad Edge E530c, and more.
D-link Dwa-643 Z1.101.161.111/11/201412/27/2015d-link_dwa-643-z1.101.161.1.exe20kbLenovo ThinkPad X60, Lenovo 1066E5G, Panasonic CF-53AAC01FG, MSI MB-7529, Buympc MPC Compute, Sony VGN-SZ7RMN_B, Lenovo 20B7S07L00, Panasonic CF-18KDHNBVA, IBM 2374KG5, Compaq DN146A-ABA S5410NX NA310, HP KZ692AA-ABU m9373.UK, HP PS306AA-AB9, Sony VGC-JS51B_P, Compaq P8654S-ABA S3000V NA110, ASUS P5K-VM/S, and more.
D-link Dwa-643 7092.131/14/201512/29/2015d-link_dwa-643-7092.13.exe54kbPackard Bell EASYNOTE PB62S00106, Packard Bell EASYNOTE_MX61-B-026, IBM 2668VMY, LG R405-A.CPF1E1, Gateway MX6627, MSI CX61 0NC/CX61 0ND/CX61 0NF/CX61 0NE, HP HPE-310pt, Sony VPCF115FG, Packard Bell EasyNote_MX37-U-005, Sony VPCF13S0E, Lenovo 7052-A7U, FIC LM10W, HP GG662AA-ABD, Sony VGN-FW140AE, Acer ATC-603, Sony VGN-SZ17SP_C, Acer AOA150p/BGW, and more.
D-link Dwa-643 X2.11.1692.110/12/201412/28/2015d-link_dwa-643-x2.11.1692.1.exe121kbSony VGN-SZ7RMN_B, NEC PC-MK34HEZEH, HP G5261de, Toshiba SATELLITE C870-1HG, Sony VPCF13JFX, HP VN294AA-UUZ p6210ch, Panasonic CF-SX2JE4DS, IBM IBM eServer 206m -[8485PEE, Dell Inspiron 580, Sony VPCSA4AJ, Packard Bell SPIRIT 4054, Foxconn AT-7000 Series, Sony VGN-FW56E, and more.
D-link Dwa-643 832602/4/201512/29/2015d-link_dwa-643-83260.exe128kbSony VGC-RA52, Sony Vgn-sz483, HP FK789AA-A2L m9450f, Dimotion PCDO5V3, MSI U4-7302, HP PN176AA-ABN, Toshiba Dynabook EX/56LWH, HP Presario 2500, HP HP Pavilion dv6-6128ca, Acer AcerPower 8000, HP GN551AAR-ABA m8200, HP HP nx9000, NEC PC-LL370RG1KS, Sony VGN-Z51MG_B, Sony VGN-NS38M_S, Sony VGN-NS15G_S, HP PAVILION DV6187, and more.
D-link Dwa-643 370412/30/201412/27/2015fjgo-3704.exe110kbPackard Bell EasyNote_MX37-U-005, MCJ MCJ, Compaq EJ284AA-ABF SR1622FR FR540, Aquarius Aquarius Std, Pro, Elt, WIPRO WNBOBM4901-0022, HP G5317de, HP PS384AA-B1U, Toshiba SATELLITE PRO C50-A-1M3, Intel Test Product, HP RA933AA-ABZ, Sony VPCCW2AFJ, and more.
D-link Dwa-643 PG058AA-ABG SR1178A AN430, Fujitsu FMVFE90DBY, HP ProLiant DL360 G5, Fujitsu LifeBook A6120, HP P6-2202el, IBM 81712EU, IBM 8187D2G, Dell PowerVault NX3100, Fujitsu FMVNA8HEC, HP 110-009el, IBM 81412EG, and more.
D-link Dwa-643 433689/27/201412/29/2015d-link_dwa-643-43368.exe109kbWIPRO WNB7PBM5100K-0004, NEC RND51048395, Gateway GT5082B, NEC PC-MY20RBZ74, HP HP Pavilion dv6-6128ca, NEC PC-VY25AAZR7, Dell Precision T5610, IBM 682342G, NEC PC-LL560MG6BL, Lenovo ThinkPad T420s, Panasonic CF-30CASAXBM, HP PW665AA-ACJ a815i, NEC PC-MY24RAZ75, WIPRO WIV37455-1080, IBM IBM System X3100 M4 -[258282J, Panasonic CF-53AAC34ZG, ICP / IEi IMBA-Q454, HP PX635AA-ABU, HP RZ412AA-ABZ, and more.
D-link Dwa-643 701.12.102/23/201512/28/2015d-link_dwa-643-701.12.10.exe159kbToshiba Satellite L650D, IBM IBM IntelliStation M Pro -[922962J, Lenovo ThinkPad X60 Tablet, Sony VGN-FW26T_B, IBM 8303MJ8, VMware VMware7,1, ZOTAC ZBOXNXS-AD11, HP HP MINI DM1-2010SO, Viglen VIG430P, Sony VPCEB36FG, Fujitsu LIFEBOOK U574, Lenovo 7360W78, Sony VGC-RM75UD, Lenovo 23061G2, Datateknik EXPER, Sony SVE15127CDS, Sony SVE11139CJB, IBM 6792GGU, and more.
D-link Dwa-643 62910/20/201412/28/2015d-link_dwa-643-629.exe205kbHP HP Pavilion dv2700 Notebook PC, Sony VGN-A39GP, Lenovo SS09221149, IBM ThinkCentre A51p, NEC PC-LL560MG6BL, HP FR564AA-ABF m9356.f, Compaq DT260A-ABU S5210UK GB340, Lenovo ThinkCentre A70z, NEC VERSAE6300 RNF91086795, NEC PC-VY25AAZR7, Fujitsu FMVXN0X81, HP 3639, HP KT334AAR-ABA m8530f, HP PAVILION DV6187, and more.
D-link Dwa-643 J2.132.1721/18/201512/30/2015d-link_dwa-643-j2.132.172.exe23kbHP P6580t, OEGStone CS-B, CompUSA PC Work Series, Medion P8613, WIPRO WSG68125W7E-0015, Fujitsu FMVA58CM, Compaq P8657J-ABA SR1000Z NA441, NEC PC-LL750FS1SR, MDGComputers Prism Vx7500VTi, Dell PowerEdge C8220, NEC PC-MY24RAZ75, Sony VGN-SZ57SN_C, Supermicro X7DBP, Sony VGN-FW190CU, and more.
D-link Dwa-643 K1.1271.102/4/201512/27/2015d-link_dwa-643-k1.1271.10.exe154kbSeneca Pro52700, Fujitsu FMVNFD75R, ARLT Computer Produkte Quattro Power Station GTX 560, Lenovo 209022U, HP Compaq nx7010, Dell Inspiron 20 Model 3048, HP BN496AV-ABA HPE-170t, Gateway SX2360, HP 800-090jp, Gateway 310 2900297, Toshiba SATELLITE L850-1M6, Acer Veriton S480G, Panasonic CF-Y8FW8CJS, Toshiba Dynabook EX1/524CDE, Epson ST160EEMR2, Samsung R510/P510, Packard Bell IXMM5740, Lenovo ThinkPad X220, Sony VGN-CR327_W, and more.
D-link Dwa-643 21.11.1071/24/201512/30/2015d-link_dwa-643-21.11.107.exe62kbCompaq PE427A-ABU S7150UK GB420, Toshiba Qosmio F60-10L, Lenovo ThinkStation S10, EUROCOM Panther 5D, NEC PC-LL3509D, Hora Hora4000, HP Pavilion dv2000, Lenovo 6088W5B, Fujitsu CELSIUS H265, EMachines L4030, SAMSUN 700Z, ASUS CS6110, Packard Bell IMEDIA X1300 AIO, Panasonic CF-19TH187QW, Toshiba SATELLITE C50-A-1HX, HP EL521AA-AB1 a1329k, Toshiba Satellite P870, and more.
D-link Dwa-643 63332.12/24/201512/28/2015d-link_dwa-643-63332.1.exe150kbRM Plc RM DESKTOP 201, Toshiba Satellite A300-1L0, IBM 26721LG, Lenovo 57125694, LG LW70-JJKG, HP Presario V2000, Fujitsu FMVLRB50P, HP FQ553AA-ABA a6608f, Toshiba SATELLITE C855-1ME, IBM 2656E6U, Lenovo SS09302455, HP H9-1156eg, Dell L550cx, HP P6725de, Packard Bell IMEDIA X96844, and more.
D-link Dwa-643 1.13912/25/201412/29/2015d-link_dwa-643-1.139.exe160kbHP 23-a030a, HP DF194A-ABZ 484, Compaq PS269AA-ABU SR1360UK GB510, HP HP ProBook 6445b, HP H9-1101es, Panasonic CF-SX2BE4BP, Sony VGC-JS4EF_S, Fujitsu D3061-A1, Fujitsu FMVNA7BEC, Compaq EC537AA-ABZ SR1549IT IT530, AMD & ATI P030A, HP Presario V4000, HP P8601A-ABU 722, IBM ThinkPad T41, HP FR561AA-ABF a6539.f, VMware VMware7,1, HP P6740ch-m, Sony VGN-CR510D, Sony VGN-TT250N, and more.
D-link Dwa-643 Q1.1642.19/14/201412/30/2015d-link_dwa-643-q1.1642.1.exe179kbHP HP ENVY TS 17 Notebook PC, Sony VGN-NS255D, HP HP Compaq nc4400, HP 310-1125uk, Panasonic CF-C1BD06EFG, Lenovo Y310, Acer ATC-603, Toshiba SATELLITE L870-150, NEC PC-MY26LEZ78, WIPRO WNB7PBM5100K-0004, Toshiba Satellite L855-S5405, Sony VGN-UX71, Lenovo ThinkPad T400, and more.
D-link Dwa-643 R721.14912/7/201412/28/2015d-link_dwa-643-r721.149.exe70kbSony VGN-NS220TH, HP Presario R4000, HP Xy107et, HP 610-1110es, NEC PC-MY26XHZE1, Intel SBD2B014, Fujitsu FMVNFC50WG, HP HP Compaq nw8000, NEC PC-GV256CLAJ, Acer NC-E1-531-B9604G, Sony VGN-FZ32G, Toshiba Dynabook T552/36FWK, Lenovo ThinkCentre Edge 71, NEC PC-VT5500DE1, MSI CX61 0NC/CX61 0ND/CX61 0NF/CX61 0NE, Lenovo Lenovo G470, Dell Inspiron 20 Model 3048, and more.
D-link Dwa-643 P71.11.19811/8/201412/29/2015d-link_dwa-643-p71.11.198.exe51kbHOUTER ORO-PC, Sony Vgn-sz483, WIPRO WNBOBM4930-EK-0015, Packard Bell IPOWER X9075, AnabelleB Pedra BA10, HP NY545AAR-ABA p6210y, Sony VGN-UX90PS, NEC EASYNOTE PB11400006, HP FK785AA-A2L s3620f, MouseComputer Z68A-SD60, IBM 8187D2G, Leading Edge LECC2600, Gateway GM5485H, Fujitsu FMVF56HDWY, IBM 818743F, LG B55MS.ARB4B1K, Transource RoadRunner NB-IH15G, Sony SVP1322R4RBI, Fujitsu FMVNXA90N, and more.
D-link Dwa-643 2269212/11/201412/28/2015d-link_dwa-643-22692.exe57kbMSI MS-9A45, Extracomputer D2312-C2, Acer Veriton S480G, HP ES116AA-B14, Gateway GT5418E, Gateway 310 2900297, Toshiba Dynabook TX/66JPK, IBM 23728EG, HP ProLiant DL360 G3, IBM IBM System x3200 M2 -[4368K5G, and more.
D-link Dwa-643 M1.137910/18/201412/30/2015iqyj-m1.1379.exe25kbMSI MS-9899, ASUS A7V, MSI U4-7302, Sony VGN-SZ7RMN_B, Sony VGN-FE21B, Packard Bell EasyNote_MX66, NEC NEC POWERMATE S2100-006, IBM 8183Y59, ICP / IEi IMBA-Q454, WIPRO WSG37425W7-0012, Sony VGC-JS92JS, HP KB020AA-ABF m9180.f, and more.
D-link Dwa-643 302821/4/201512/29/2015d-link_dwa-643-30282.exe161kbPackard Bell ISTART 8401, Samsung SQ45S70S, IBM IBM System x3500 M4 Server -[7383AC1, Lenovo IdeaPad S9e, Acer Acer Project, Toshiba PSC0SE-02E21EFR, CASPER CASPER NEO, HP HP Compaq nc6220, HP Presario R3000, Lenovo ThinkCentre M80, Sony VGN-FW17_B, HP P6721f, Compaq RF785AA-ABU SR2029 NA100, HP PX679AA-B1U, HP HP Compaq nc6220, HP KN483AA-AB8 m9242.t, VIA KM400/A-823x, HP 810-019eb, and more.
D-link Dwa-643 822939/10/201412/30/2015d-link_dwa-643-82293.exe179kbSony VGN-S5VP_B, HP KY787AA-AKL p6172l, Panasonic CF-R8EWBAAP, IBM 2672CBJ, Fujitsu FMVNFE50W, Dimotion PCDO5V3, HP KT334AAR-ABA m8530f, Dell PowerEdge R905, Sony VGN-NS21ER_S, HP KX568AA-UUW, HP XY310ES, IBM 622133U, and more.

Please Note: There are particular operating systems known to have problems with D-link Dwa-643:
  • Windows 7 Service Pack 1 (Microsoft Windows NT)
  • Windows Fundamentals for Legacy PCs
  • Windows 8 Enterprise
  • Windows Vista Ultimate
  • Windows XP Home Edition, for home desktops and laptops
  • Windows 7 Enterprise (Microsoft Windows NT)
  • Windows 7 Professional
  • Windows 7 Home Premium
  • Windows XP Professional x64 Edition
  • Windows Vista Business
If you encounter problems with the direct download for these operating systems, please consult the driver download manager for the specific D-link Dwa-643 model.
Laptop D-link Dwa-643Tablet D-link Dwa-643Download D-link Dwa-643Upgrade D-link Dwa-643Update D-link Dwa-6432016 D-link Dwa-643Free D-link Dwa-643Data D-link Dwa-643Info D-link Dwa-643Help D-link Dwa-643Guide D-link Dwa-643Comments D-link Dwa-643Windows 10 D-link Dwa-643Vista D-link Dwa-643Windows 7 D-link Dwa-643Install D-link Dwa-643