lol... another one of my dilemmas.
I don't really have a work number. I am a student, work like a part-time job, so I don't really have a work phone number, not like my own desk with a phone, sure, I have my employer's phone number, if that is what you want, CIC, but it doesn't sound like that, so I have just put N/A in that space, hope that is okay, CIC.
Also, the home phone number, I rarely use my home phone and never check the voicemail myself. I always give out my cellphone number. So in the home phone space on the application, I put my cellphone number down.
Hope that answered your question. I think an N/A is fine, but not a blank space. Or put your cellphone number for home.