Sony Internal Codes for Walkman Models (update 5)

(ICX-1288 - NW-ZX300)

In a previous article, I wrote about two upcoming portable audio players from Sony, the ICX-1291 and ICX-1300.  While I still do not have any additional information/specifications about the unknown devices, I was able to find out the internal codes for current and past models, so here is the list of all the models identified so far.

Update 5 - June 2025

 

I have re-ordered the list so it is now ordered by the code. Unfortunately there is no information regarding any new Walkman models in the near future.

• ICX-1302B - NW-ZX700 (YY1302B)
• ICX-1301B - NW-A300 (YY1301B)
• ICX-1300 - DMP-Z1
• ICX-1299 -  NW-WM1AM2 (YY1299B)
• ICX-1298  - NW-WM1ZM2 (YY1289B)
• ICX-1295 -  NW-ZX500
• ICX-1293 - NW-A100
• ICX-1291 - NW-A50
• ICX-1290 - NW-A40
• ICX-1288 - NW-ZX300
• ICX-1285 - NW-S310
• ICX-1282 - NW-WS620
• ICX-1280 - NW-A30
• ICX-1278 - NW-WM1Z
• ICX-1277 - NW-WM1A
• ICX-1275 - NW-A20
• ICX-1272 - NW-E390
• ICX-1269 - NW-ZX100
• ICX-1268 - NW-WS410
• ICX-1267 - NW-S10
• ICX-1266 - NW-ZX2
• ICX-1263 - NWZ-A10
• ICX-1261 - NW-WS610
• ICX-1258 - NW-B180
• ICX-1254 - NWZ-M500
• ICX-1242 - NW-E080
• ICX-1240 - NW-ZX1
• ICX-1237 - NWZ-F880
• ICX-1227 - NWZ-F800
• ICX-1212 - MDR-NWBT10 
• ICX-1210 - NWZ-A860
• ICX-1134 - NWZ-X1000
• ICX-1115 - NWZ-A820

There are a lot of models missing, mostly because they do not have a teardown, or if a teardown exists, no ICX code is present. I suspect the ICX code is only used internally and during development. This is why the FCC listings have the code.

If a new Walkman model were to be released, a possible code would be ICX-1303, or maybe ICX-1304, and would use YY1303/YY1304 code.