Flipper is preset to work common STBs / cable boxes, like some Spectrum / Motorola / Arris boxes. Press CH to test. If not working, then look for your manufacturer below.
See the full code list n the next article, Full Code List
STB / Cable
Amino: 3704
Amino: 3704
Arris: 2084, 3904, 3924, 3934, 3944, 2664
Arris IP series: 3944
Arris DSR800: 2344
Arris VIP2502: 3924
Arris VIP5662w: 3934
Arris DCX9: 2404
ATT: 3914
ATT Android Box: 2324, 4154
Bell: 3934, 4004, 2294, 3274, 3564, 2654, (also see Arris)
Bell Fibe 4K: 3934 (Arris VIP5662w)
Cisco: 3914, 2594, 1274
Direct TV: 2324, 3874, 3964, 3004
Direct TV Genie: 2324
Dirct TV (Technicolor): 4154
Dish 722, 222: 4314, 3594, 3584, 3694, 3354, 2294, 3714 (see article re: Dish)
Dish Wally / Hopper: 2294
Dish Joey: 4314
eStream: 2564, 2794, 3254
Fusion: 3224 (old ATT box VIP5662); Newer boxes may be eStream codes or 4154
Cox Contour: 3084
Contour: 3084
Evolution / Tivo: 2404, 1004, 2444, 2564, 2794, 2954, 2994, 3134, 3254
Motorola: 2084, 3814
Motorola VIP2202: 3824
Pace: 2404, 2084, 3804, 1294, 2464, 2724, 3684
Pace IP series: 3944
Rogers Ignite TV 3084
Samsung: 3884
Samsung SMTt-7100: 1364
Shaw: Arris DSR800: 2344
Shaw: Arris Gateway TV box: 3904
SDMC (Android Box): 5044
Spectrum: 2084, 2664, 3084
Spectrum T-101: 3234 (preset code)
Sylvania 2361
Technicolor: 2914, 3084, 3224
Technicolor UIW4020: 4154
Technicolor UCW4026mcs 4154
Technicolor DCI401MCS: 2084
Technicolor UCW4026MCS / ATT Adroid box: 4154
Telus 3084, 3224
Tivo: 2404
WOW UIW4020: 4154
Xfinity: 3084, 3814