Added a few MS ones and others that I have observed from my DNS logs

list.txt

@@ -12,6 +12,7 @@ affiliate
 affiliatepage
 affiliates
 afp
+ajax
 analytics
 android
 answer
@@ -44,6 +45,7 @@ calendar
 cart
 catalog
 catalogs
+cdn
 chart
 charts
 chat
@@ -56,9 +58,9 @@ code
 community
 confirm
 confirmation
-contact-us
 contacts
 contactus
+contact-us
 content
 core
 corp
@@ -89,6 +91,7 @@ engine
 error
 errorlog
 errors
+exchange
 features
 feed
 feedburner
@@ -125,6 +128,7 @@ html
 htrnl
 http
 https
+i
 image
 images
 img
@@ -178,6 +182,8 @@ ns2
 ns3
 ns4
 ns5
+oauth
+ocsp
 org
 other
 p0rn
@@ -190,6 +196,7 @@ partners
 payment
 people
 person
+pixel
 places
 podcasts
 pop
@@ -293,8 +300,8 @@ uploads
 validation
 validations
 video
-video-stats
 videos
+video-stats
 voice
 w
 wave
@@ -306,6 +313,7 @@ whm
 whois
 wifi
 wiki
+wpad
 ww
 www
 wwww