I find that some repaints are using incorrect airlines. So if you are NOT using EDITVOICEPACK these are the default recognized phrases for your aircraft.cfg's
NOTE: These are straight from the FS2004 SDK and some might be updated in FSX, idk.
Recognized ATC airlines
Phrase ID ATC text and audio
atc_airline=AB EX Ab Ex
atc_airline=ACES Aces
atc_airline=ACTION AIR Action Air
atc_airline=AEROFLOT Aeroflot
atc_airline=AEROMEXICO Aeromexico
atc_airline=AIR AFRIQUE Air Afrique
atc_airline=AIR CANADA Air Canada
atc_airline=AIR CHINA Air China
atc_airline=AIR FORCE Air Force
atc_airline=AIR FORCE ONE Air Force One
atc_airline=AIR FRANCE Air France
atc_airline=AIR INDIA Air India
atc_airline=AIR SHUTTLE Air Shuttle
atc_airline=AIR TAHITI NUI Air Tahiti
atc_airline=AIRWAVE Airwave
atc_airline=ALASKA Alaska
atc_airline=ALITALIA Alitalia
atc_airline=ALL NIPPON All Nippon
atc_airline=ALLEGHENY Allegheny
atc_airline=ALLEGIANT Allegiant
atc_airline=ALLEGRO Allegro
atc_airline=ALOHA Aloha
atc_airline=AMERICAN American
atc_airline=AMERICAN PACIFIC American Pacific
atc_airline=AMERIJET Amerijet
atc_airline=AMTRAN Amtran
atc_airline=ANSETT Ansett
atc_airline=ANTILLEAN Antillean
atc_airline=ANZA Anza
atc_airline=ARGENTINA Argentina
atc_airline=ARMY Army
atc_airline=ARUBA Aruba
atc_airline=ASIANA Asiana
atc_airline=AUSTRIAN Austrian
atc_airline=AVIANCA Avianca
atc_airline=AVIATECA Aviateca
atc_airline=BAHAMASAIR Bahamasair
atc_airline=BALKAN Balkan
atc_airline=BANGLADESHI Bangladeshi
atc_airline=BIG A Big A
atc_airline=BISCAYNE Biscayne
atc_airline=BIZ EX Biz Ex
atc_airline=BLUE RIDGE Blue Ridge
atc_airline=BLUE STREAK Blue Streak
atc_airline=BRITANNIA Britannia
atc_airline=CACTUS Cactus
atc_airline=CAIR Cair
atc_airline=CANADIAN Canadian
atc_airline=CANDLER Candler
atc_airline=CANEX Canex
atc_airline=CARGOLUX Cargolux
atc_airline=CATHAY Cathay
atc_airline=CHALLENGE AIR CARGO Challenge Air Cargo
atc_airline=CHAUTAUQUA Chautauqua
atc_airline=CHINA SOUTHERN China Southern
atc_airline=CITRUS Citrus
atc_airline=COAST GUARD Coast Guard
atc_airline=COMAIR Comair
atc_airline=CONDOR Condor
atc_airline=CONTINENTAL Continental
atc_airline=CORSAIR Corsair
atc_airline=DELTA Delta
atc_airline=DHL DHL
atc_airline=DOMINICANA Dominicana
atc_airline=DRAGONAIR Dragonair
atc_airline=DREAM FLIGHT Dream Flight
atc_airline=DYNASTY Dynasty
atc_airline=EAGLE FLIGHT Eagle Flight
atc_airline=EASTERN Eastern
atc_airline=EGYPTAIR EgyptAir
atc_airline=EL AL El Al
atc_airline=ELITE Elite
atc_airline=EMERALD HARBOR AIR Emerald Harbor Air
atc_airline=EMERY Emery
atc_airline=EUROPA Europa
atc_airline=EVA Eva
atc_airline=EVERGREEN Evergreen
atc_airline=FED EX Fed Ex
atc_airline=FINE AIR Fine Air
atc_airline=FINNAIR Finnair
atc_airline=FIRST AIR First Air
atc_airline=FLAG SHIP Flag Ship
atc_airline=FRENCH LINE French Line
atc_airline=FRONTIER FLIGHT Frontier Flight
atc_airline=GAIA Gaia
atc_airline=GARUDA Garuda
atc_airline=GEMINI Gemini
atc_airline=GEORGIAN Georgian
atc_airline=GHANA Ghana
atc_airline=GIANT Giant
atc_airline=GLOBAL FREIGHTWAYS Global Freightways
atc_airline=GULF FLIGHT Gulf Flight
atc_airline=HAWAIIAN Hawaiian
atc_airline=HORIZON Horizon
atc_airline=IBERIA Iberia
atc_airline=ICE AIR Ice Air
atc_airline=JAMAICA Jamaica
atc_airline=JAPAN AIR Japan Air
atc_airline=JET BLUE Jet Blue
atc_airline=JET LINK Jet Link
atc_airline=JET SET Jet Set
atc_airline=JET USA Jet USA
atc_airline=JORDANIAN Jordanian
atc_airline=KESTREL Kestrel
atc_airline=KITTY HAWK Kitty Hawk
atc_airline=KLM KLM
atc_airline=KOREAN AIR Korean Air
atc_airline=KUWAITI Kuwaiti
atc_airline=LAKES AIR Lakes Air
atc_airline=LAN CHILE Lan Chile
atc_airline=LANDMARK Landmark
atc_airline=LAPA Lapa
atc_airline=LAUDA Lauda
atc_airline=LEGENDARY Legendary
atc_airline=LIFEFLIGHT LifeFlight
atc_airline=LONG HORN Long Horn
atc_airline=LTU LTU
atc_airline=LUFTHANSA Lufthansa
atc_airline=MALAYSIAN Malaysian
atc_airline=MALEV Malev
atc_airline=MARINE Marine
atc_airline=MARTINAIR Martinair
atc_airline=MESABA Mesaba
atc_airline=MEXICANA Mexicana
atc_airline=MID EX Mid Ex
atc_airline=MIDLAND Midland
atc_airline=MIDWAY Midway
atc_airline=MONARCH Monarch
atc_airline=MOROC AIR Moroc Air
atc_airline=NAVY Navy
atc_airline=NEW ZEALAND New Zealand
atc_airline=NIGERIA Nigeria
atc_airline=NIGHT CARGO Night Cargo
atc_airline=NORTH AMERICAN North American
atc_airline=NORTHWEST Northwest
atc_airline=OLYMPIC Olympic
atc_airline=OMNI Omni
atc_airline=ONTARIO Ontario
atc_airline=ORANGE Orange
atc_airline=ORBIS Orbis
atc_airline=ORBIT Orbit
atc_airline=OZARK Ozark
atc_airline=PACIFICA Pacifica
atc_airline=PAKISTANI Pakistani
atc_airline=PAN AM Pan Am
atc_airline=PHILIPPINE Philippine
atc_airline=POLAR TIGER Polar Tiger
atc_airline=PRO AIR Pro Air
atc_airline=QANTAS Qantas
atc_airline=RED ROCK Red Rock
atc_airline=REGIONAL Regional
atc_airline=RYAN Ryan
atc_airline=SABENA Sabena
atc_airline=SAUDIA Saudia
atc_airline=SCANDINAVIAN Scandinavian
atc_airline=SHAMROCK Shamrock
atc_airline=SINGAPORE Singapore
atc_airline=SKY EX Sky Ex
atc_airline=SKYTOUR Skytour
atc_airline=SKYWEST Skywest
atc_airline=SOAR Soar
atc_airline=SOBELAIR Sobelair
atc_airline=SOUTHWEST Southwest
atc_airline=SPEED BIRD Speed Bird
atc_airline=SPIRIT WINGS Spirit Wings
atc_airline=SPRINGBOK Springbok
atc_airline=SUN COUNTRY Sun Country
atc_airline=SWISSAIR Swissair
atc_airline=TACA Taca
atc_airline=TAP Tap
atc_airline=THAI Thai
atc_airline=TRADEWINDS Tradewinds
atc_airline=TRANSAT Transat
atc_airline=TWA TWA
atc_airline=UNITED United
atc_airline=UPS UPS
atc_airline=US AIR US Air
atc_airline=US AIR SHUTTLE USAir Shuttle
atc_airline=VANGUARD AIR Vanguard Air
atc_airline=VARIG Varig
atc_airline=VASP Vasp
atc_airline=VIRGIN Virgin
atc_airline=VOLGA Volga
atc_airline=VOYAGE Voyage
atc_airline=WATER SKI Water Ski
atc_airline=WEST West Jet
atc_airline=WEST INDIAN West Indian
atc_airline=WINDY CITY Windy City
atc_airline=WISCONSIN Wisconsin
atc_airline=WORLD World
atc_airline=WORLD TRAVEL World Travel
atc_airline=YUKON Yukon
atc_airline=ZANTOP Zantop