Eham uses a lot of frequencies of course so dennis is right to assume that east and west bound don't speak to the same guy/gall on the same frequency..
It is one fir but a hell of a lot of controllers....
The list beneath was updated last this january..
118,0750 Approach/departure (back-up) 118,1000 Tower (rwy 18C-36C) 118,2800 Tower (rwy 18R-36L) 118,4000 Arrival (primary) 118,8050 Radar Sugol 118,9550 Tower (rwy 06-24) 119,0500 Approach/departure TMA east 119,1750 Flight Information service (northsea north) 119,2250 Tower (rwy 04-22/18L-36R) 119,9000 Tower (back-up) 120,5550 Radar Artip 120,8800 Discrete emergency frequency 121,2000 Approach/departure TMA west 121,3000 KLM Snowdesk (remote de-icing) 121,5000 International emergency frequency 121,6000 KLM PAD-control deicing 121,6550 Planner 121,7000 Groundcontrol south 121,7150 KLM de-icing P10 121,7400 KLM de-icing P16 121,7800 Aproncontrol south 121,8000 Groundcontrol north 121,8800 Aproncontrol north 121,9050 Groundconrol west 121,9250 K-apron Schiphol-east (general aviation) 121,9800 Clearance delivery 122,2050 ATIS departure information 122.4250 Groundcontrol (back-up) 123,7000 Radar-5 north-west 123,8550 Radar-3 south 124,3000 Flight information service (over land) 124,8800 Radar-2 east outbound 125,7500 Radar-4 south-west 126,2000 VOLMET 126,6750 Arrival (back-up) 127,7800 Radar-3 south (back-up) 128.0000 Politie Landelijke Eenheid Schiphol-oost 128,5800 Radar-2 east inbound 130,0250 KLM de-icing P12 130,4800 Airside operations manager (AOM) 130,6500 KLM de-icing P14 130,8550 Aviapartner de-icing 130,9550 Radar-3 south inbound 131,1500 Arrival secondary 131,2800 Approach/departure (back-up) 131,3500 ATC operational information 131,4150 KLM TLO B/C/D (lange tijd niet gehoord) 131,4250 KLC operations 131,4350 KLM dispatch 131,5000 EL-AL 131,5500 BA engineering 131,5600 Swissport operations 131,5750 Aviapartner operations 131,6050 Aviapartner executive operations 131,6250 KLM Jetcenter 131,6500 KLM operations 131,6650 Swissport cargo 131,6850 TUI 131,7500 Nayak 131,7750 KLM snowdesk (gate de-icing) 131,8000 Menzies operations 131,8500 Dnata cargo operations 131,8800 Jetsupport operations 131,9000 Transavia 131,9150 World freight services 131,9250 Martinair operations 131,9400 KLM maintenance 131,9600 KLM TLO E/F/G 131,9800 KLC maintenance 132,5800 Radar-2 east (inbound) 132,9800 ATIS arrival information 134,3750 Radar-1 north 134,8750 Tower (towtraffic) 136,6500 Flight information service (northsea south)