my list:

AT&T, @mobile.att.net
CINGULAR, @mobile.mycingular.net
NEXTEL, @messaging.nextel.com
SPRINT, @messaging.sprintpcs.com
VERIZON, @vtext.com
Alltel, @message.alltel.com
Ameritech (ACSWireless), @paging.acswireless.com
BellSouth Mobility, @blsdcs.net
Blue Sky Frog, @blueskyfrog.com
Cellular South, @csouth1.com
CellularOne, @mobile.celloneusa.com
Edge Wireless, @sms.edgewireless.com
Golden Telecom, @sms.goldentele.com
Idea Cellular, @ideacellular.net
Kyivstar, @sms.kyivstar.net
Metrocall Pager, @page.metrocall.com
Mobilfone, @page.mobilfone.com
NPI Wireless, @npiwireless.com
SunCom, @tms.suncom.com
SureWest Communications, @mobile.surewest.com
T-Mobile, @tmomail.net
Virgin Mobile, @vmobl.com

Please post more if you know of any!

qwest is @qwestmp.com

just out of curosity what are you compiling this list for?

I'm assuming for server monitoring. When a service/server goes down, you can get it to send an alert directly to your cell.

BellSouth Mobility, @blsdcs.net

Actually Bellsouth Mobility DCS in the Carolinas, should have been consoldated under Cingular. It seems the domain blsdcs.net is no longer even owned by either Bellsouth or Cingular.

Originally posted by lelahosting
qwest is @qwestmp.com

just out of curosity what are you compiling this list for?

I have my own monitoring application that I wrote a few years back, I am in the process of re-writing parts of it. It's a multiple user/server monitoring application and I already had that list from another project not related that did text messages I figured I would post it to share for others and in the process add a few more to my list.

Canadian Based Providers

Fido is @fido.ca
Telus is @telusmail.net