ACARS Frequencies

[Ambrose_Wolfinger]

I'm interested in decoding ACARS. I've noticed three different sets of frequencies -

ACARS Frequencies

I did some exploring with ACARS previous, in the days of ACARSD. I am starting to get back into it and was curious what most folks are finding are the common ACARS frequencies in the US these days. I've tried searching around and know what the primary, second and tertiary ones are but are people...

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Aircraft Communications Addressing and Reporting System (ACARS) - Signal Identification Wiki

ACARS is a digital datalink system for the transmission of short messages between aircraft and ground stations via airband radio or satellite.

www.sigidwiki.com

Aircraft Communications Addressing and Reporting System (ACARS) (United States) Scanner Frequencies and Radio Frequency Reference

Scanner Frequencies and Radio Frequency Reference for Aircraft Communications Addressing and Reporting System (ACARS) (United States)

www.radioreference.com

They all vary slightly and I'm wondering which one is most accurate. If it helps, I'm in the D/FW region.