Some General Remarks: Firstly, yes, I have deviated sharply from my Montgomery County-centric Web site to provide this page, but I hope this information is helpful.  Please see my main scanner page for a guide to my "remarks" column.  My attempt to verify these frequencies was made during one game only (July 1998).  All "MSA" frequencies (not "possibly MSA") are grouped due to their common CTCSS of 192.8 (thanks to Alan Henney for this information), the MSA frequencies are not FCC licensed.  The "Baltimore Orioles" frequencies are FCC licensed, however I was unable to verify their use.  Some listed but unverified frequencies were provided by Alan Henney.
 

Owner	Use	Frequency	Remarks
Maryland Stadium Authority  (MSA)	Maintenance  Administrative/Maintenance (base: MSA)  ?  ?  ?	461.6375  462.1625  463.5625  464.6625  466.6375	S  S  S*  S  S
Possibly MSA	Parking  Maintenance  Security? ? Maintenance?	461.1625  463.2625  463.6875  464.4375 464.5125	S  S*  S S S
ARAMARK  (Food Services)	Operations  ?  ?  ?	461.2  463.6125 464.3625  468.6125	R  S S S*
Wells Fargo	Security	463.2	R
Baltimore Orioles	?  ?	464.6375  469.6375	S*  S*