That wouldn't give him the nameserver IP's however; that would enable him to point his domain at his home system, which isn't the intended objective.You can check your IP address by simply search on Google "What is my IP"
This will show your IP address
I have some domains at GoDaddy that I use on this and other hosts - I do not use IPs (in DNS records) with any of themI have brought a goDaddy domain and it will not let me connect it without an IP address