Try 2434 it works with the URC-8820 remote on the 40" TV.
its on the manual
COX communications proc\vides cable tv and internet service in the 89129 zip code.
I just found a remote code for my TCL L40FHDM11 tv: 651. It works, but I still have to use the remote that came with the tv to turn it on & off and for volume.
Not sure a out your model but try codes for RCA. I have a 24" TCL tv and the code that worked for Direct GV was 11447. Good Luck
I've read elsewhere that Logitech Harmony universal remotes will work using RCA codes, they suggested L32HD31 as your TV to get it to control the TCL tv and comcast. I have used 10047 and 11781 as the remote code for a TCL LCD TV on my Comcast digital adapter remote. They are each RCACodes, that work perfectly on TCL , as RCA is owned by TCL.
I have cox cable and the prismo hd used Mitsubishi code 0178 I found this out with my harmony 300 remote as there is not a listed code and it came the closest.
tcl
One can find a Cox cable TV guide online by going directly to the main Cox Communications website. There one can look for the area in which they subscribe to TV services and check the TV guide for that area.
It appears the TCL 55" uses RCA codes. Give RCA codes a try because they worked for me -- in my case, code 333 worked for my Avex R6 (URC-RC) Universal remote control. Maybe the other TCL TVs use the same RCA codes.
The amount Cox Cable charges for tv would depend on the type of service that is wanted. There is basic tv, premium channels, high definition packages, etc.
who makes the tcl tv's
Time Warner and Cox Communications