ATMs I’ve checked:
BNP Paribas: no balance inquiry option. Nor did it print the balance on the receipt.
Attijariwafa: no balance inquiry option. Both ATMs are always out of paper, so no way to check whether the balance would be printed on the receipt. Anti-feature: you must enter your PIN before it shows you the menu. Does that mean it connects to my bank even in the absense of a transaction?
Ing: no longer has ATMs?
KBC: no longer has ATMs?
#Belfius: no longer has ATMs? (answered)
Aion: only has 1 ATM (unplugged & vandalized)
Europabank: has no ATMs?
DHB bank: has no ATMs?
Fintro: ATM is the same as BNP Parabas?
BBVA: do they still exist?
Bank of Baroda: has no ATMs?
Beobank: didn’t check if they have any ATMs
Keytrade: likely has no ATMs
BinckBank: likely has no ATMs
Batopin (3rd party w/Ing & KBC): no balance inquiry option.
This website claims to give a way to check your balance, but I’m not so trusting:
No. There are a couple unpublished phone numbers but they’re a disaster. I’ve not encountered a Belgian bank that gives automated account info over the phone. Last time I called I think it was just a greeting saying “contact us through the app or email” or something like that, IIRC.