I may be in the minority but I do not post my phone number anywhere. I have my email address listed as well as a contact form on my website. This is intentional as I can then control when I speak with someone on the phone (not the 30 min crazy window before nap time) and I can choose when it is convenient for me e.g. evenings. My clients of course have my phone numbers and it is listed on my business cards for people who those are given to.