Here is a list of the email endings for cell phone numbers listed by provider in the US.
United States
Provider
E-mail to SMS address format
3 River Wireless
xxxxxxxxx@sms.3rivers.net
Advantage Communications
xxxxxxxxx@advantagepaging.com
AirVoice
xxxxxxxxx@mmode.com
Airtouch Pagers
xxxxxxxxx@airtouch.net
Airtouch Pagers
xxxxxxxxx@airtouchpaging.com
Airtouch Pagers
xxxxxxxxx@alphapage.airtouch.com
Airtouch Pagers
xxxxxxxxx@myairmail.com
AllTel
xxxxxxxxx@message.alltel.com
Alltel PCS
xxxxxxxxx@message.alltel.com
Alltel
xxxxxxxxx@alltelmessage.com
Ameritech Paging
xxxxxxxxx@pageapi.com
Arch Pagers (PageNet)
xxxxxxxxx@archwireless.net
Arch Pagers (PageNet)
xxxxxxxxx@epage.arch.com
Bell South (Blackberry)
xxxxxxxxx@bellsouthtips.com
Bell South Mobility
xxxxxxxxx@blsdcs.net
Bell South
xxxxxxxxx@blsdcs.net
Bell South
xxxxxxxxx@sms.bellsouth.com
Bell South
xxxxxxxxx@wireless.bellsouth.com
Bluegrass Cellular
xxxxxxxxx@sms.bluecell.com
Boost Mobile
xxxxxxxxx@myboostmobile.com
Boost
xxxxxxxxx@myboostmobile.com
CallPlus
xxxxxxxxx@mmode.com
Carolina Mobile Communications
xxxxxxxxx@cmcpaging.com
Cellular One East [...]
