I discovered that NetSuite's dns servers ens0 & 1 .netsuite.com are invisible from Comcast's business services in the Chicago area(limits of my testing abilities) but I can reach these same servers from a Linode virtual system in the Dallas, TX area.
Looks like it's been this way for at least two months.
If someone from NetSuite could say hi and look into it, I am sure it will help NetSuite more than me.
Lyle Giese
LCR Computer Services, Inc.