Philadelphia -- Advanced Telecom Services has updated its participating carrier list for its text message marketing product 84444.com.

84444.com is a do-it-yourself text message marketing site that allows businesses and organizations to easily launch interactive and broadcast mobile marketing services.

Listed below are the carriers and its total subscribers.

Tier 1 Mobile Operators

AT&T  - 92.8 million
Sprint - 43.8 million (includes Nextel & Boost)
Nextel
Boost

T-Mobile USA - 34 million
Verizon - 101 million (includes Alltel)
Alltel

Tier 2 Mobile Operators

Boost - 5 million
Cricket Communications - 4 million
Metro PCS - 7.6 million
US Cellular - 6 million
Virgin Mobile USA - 5 million

Tier 3 Mobile Operators

ECIT
Cellcom - 3.3 million
Cellular South - 700,000
Centennial Wireless - 750,000
East Kentucky Network - unknown
nTelos - 500,000
Tracfone - unknown

All Others - 3 million

ACS Wireless
Alaska Communications
Bluegrass Cellular
Cox Wireless
Element Mobile
GCI Wireless
Golden State Cellular
I Wireless
Immix/PC Management
Plateau Wireless
Inland Cellular
Illinois Valley Cellular
Midwest Wireless
Nex-Tech
Rural Cellular Corp
Thumb Cellular
United
Viaero Wireless
West Central Wireless

Hawkeye
Chat Mobility
Northwest Missouri Cellular
Panhandle Wireless
Pioneer
Pocket
Simmetry
Syringa Wireless
Revol Wireless
Union Wireless