Chicago (ZAU) Air Route Traffic Control Center Scanner Frequencies and Radio Frequency Reference

Chicago (ZAU) Air Route Traffic Control Center

Last Updated: March 1, 2022, 9:20 pm

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Illinois RCAG Sites

Aurora, IL - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
123.750		BM	CSQ	ZAU50 STQ-L	Sector 50 Streator Low SFC to 10,000 (Normally combined at ZAU51)	AM	Aircraft
259.100		BM		ZAU50 STQ-L	Sector 50 Streator Low SFC to 10,000 (Normally combined at ZAU51)	AM	Aircraft

Bloomington, IL - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
124.800		BM	CSQ	ZAU45 RBS-H	Sector 45 Roberts Hi (Spare) FL230-999	AM	Aircraft
353.775		BM		ZAU45 RBS-H	Sector 45 Roberts Hi (Spare) FL230-999	AM	Aircraft

Bradford, IL - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
124.550		BM	CSQ	ZAU50 STQ-L	Sector 50 Streator Low SFC to 10,000 (Normally combined at ZAU51)	AM	Aircraft
132.225		BM	CSQ	ZAU52 BDF-H	Sector 52 Bradford Hi FL240-330	AM	Aircraft
307.125		BM		ZAU50 STQ-L	Sector 50 Streator Low SFC to 10,000 (Normally combined at ZAU51)	AM	Aircraft
323.225		BM		ZAU52 BDF-H	Sector 52 Bradford Hi FL240-330	AM	Aircraft

Chicago Heights, IL - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
132.950		BM	CSQ	ZAU (Spare)	Spare/Traffic Congestion (Normally combined at ZAU44)	AM	Aircraft
318.800		BM		ZAU (Spare)	Spare/Traffic Congestion (Normally combined at ZAU44)	AM	Aircraft

Danville, IL - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
135.750		BM	CSQ	ZAU57 DNV-L	Sector 57 Danville Low 10,000-FL180	AM	Aircraft
353.950		BM		ZAU57 DNV-L	Sector 57 Danville Low 10,000-FL180	AM	Aircraft

Des Plaines, IL - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
120.350		BM	CSQ	ZAU81 CRIBB	Sector 81 CRIBB Low	AM	Aircraft
317.400		BM		ZAU81 CRIBB	Sector 81 CRIBB Low	AM	Aircraft
377.075		BM		ZAU81 CRIBB	Sector 81 CRIBB Low (New)	AM	Aircraft

Freeport, IL - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
132.625		BM	CSQ	ZAU71 ALO-SH	Sector 71 Waterloo Super Hi FL370 & Abv	AM	Aircraft
350.250		BM		ZAU71 ALO-SH	Sector 71 Waterloo Super Hi FL370 & Abv	AM	Aircraft

Hampshire, IL - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
134.200		BM	CSQ	ZAU WKLD	Spare Workload Freq NW	AM	Aircraft
291.750		BM		ZAU WKLD	Spare Workload Freq NW	AM	Aircraft

Joliet, IL - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
135.150		BM	CSQ	ZAU51 PLANO	Sector 51 PLANO Low 11,000-FL230	AM	Aircraft
323.300		BM		ZAU51 PLANO	Sector 51 PLANO Low 11,000-FL230	AM	Aircraft

Kankakee, IL - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
118.225		BM	CSQ	ZAU83 JOT-H	Sector 83 Joliet Hi FL240-340	AM	Aircraft
119.950		BM	CSQ	ZAU43 NEWTT	Sector 43 NEWTT Low FL190-FL230	AM	Aircraft
120.125		BM	CSQ	ZAU44 EON-L	Sector 44 Peotone Low FL190--FL230	AM	Aircraft
256.800		BM		ZAU44 EON-L	Sector 44 Peotone Low FL190-FL230	AM	Aircraft
353.550		BM		ZAU83 JOT-H	Sector 83 Joliet Hi FL240-340	AM	Aircraft
353.700		BM		ZAU43 NEWTT	Sector 43 NEWTT Low FL190-230	AM	Aircraft

Leroy, IL - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
119.225		BM	CSQ	ZAU58 LINCN	Sector 58 Lincoln Low 11,000-FL230	AM	Aircraft
307.250		BM		ZAU58 LINCN	Sector 58 Lincoln Low 11,000-FL230	AM	Aircraft

Maple Park, IL - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
127.075		BM	CSQ	ZAU77 MALTA	Sector 77 MALTA Low	AM	Aircraft
307.275		BM		ZAU77 MALTA	Sector 77 MALTA Low	AM	Aircraft

Marengo, IL - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
133.350		BM	CSQ	ZAU74 FARMM	Sector 74 FARMM Low	AM	Aircraft
335.800		BM		ZAU74 FARMM	Sector 74 FARMM Low	AM	Aircraft

Milford, IL - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
121.275		BM	CSQ	ZAU46 BVT-H	Sector 46 Boiler Hi FL240-300	AM	Aircraft
127.325		BM	CSQ	ZAU47 RAN-SH	Sector 47 Chanute Super Hi FL310 & Abv	AM	Aircraft
327.025		BM		ZAU47 RAN-SH	Sector 47 Chanute Super Hi FL310 & Abv	AM	Aircraft
351.950		BM		ZAU46 BVT-H	Sector 46 Boiler Hi FL240-300	AM	Aircraft

Moline, IL - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
118.750		BM	CSQ	ZAU55 BRL-L	Sector 55 Burlington Low SFC to FL230	AM	Aircraft
377.050		BM		ZAU55 BRL-L	Sector 55 Burlington Low SFC to FL230	AM	Aircraft

Monee, IL - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
126.275		BM	CSQ	ZAU84 MCK-SH	Sector 84 McCook Super Hi	AM	Aircraft
360.750		BM		ZAU84 MCK-SH	Sector 84 McCook Super Hi	AM	Aircraft

Northbrook, IL - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
128.650		BM	CSQ	ZAU WKLD	Overload for ZAU26/81/83	AM	Aircraft
133.200		BM	CSQ	ZAU26 KUBBS	Sector 26 KUBBS Low SFC to FL230	AM	Aircraft
343.675		BM		ZAU26 KUBBS	Sector 26 KUBBS Low SFC to FL230	AM	Aircraft
351.825		BM		ZAU WKLD	Overload for ZAU26/81/83	AM	Aircraft

Pontiac, IL - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
119.950		BM	CSQ	ZAU43 NEWTT	Sector 43 NEWTT Low	AM	Aircraft
353.700		BM		ZAU43 NEWTT	Sector 43 NEWTT Low	AM	Aircraft

Roberts, IL - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
134.025		BM	CSQ	ZAU45 RBS-H	Sector 45 Roberts Hi FL240-999	AM	Aircraft
379.150		BM		ZAU45 RBS-H	Sector 45 Roberts Hi FL240-999	AM	Aircraft

Rockford, IL - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
124.725		BM	CSQ	ZAU92 HAWKS	Sector 92 HAWKS Hi FL240-320	AM	Aircraft
279.650		BM		ZAU92 HAWKS	Sector 92 HAWKS Hi FL240-320	AM	Aircraft

Waukegan, IL - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
126.425		BM	CSQ	ZAU82 SWEET	Sector 82 SWEET Low	AM	Aircraft
348.725		BM		ZAU82 SWEET	Sector 82 SWEET Low	AM	Aircraft

Indiana RCAG Sites

Crown Point, IN - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
134.875		BM	CSQ	ZAU35 BEARZ	Sector 35 BEARZ Low 11,000-FL250	AM	Aircraft
290.250		BM		ZAU35 BEARZ	Sector 35 BEARZ Low 11,000-FL250	AM	Aircraft

Fort Wayne, IN - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
119.850		BM	CSQ	ZAU37 OLK-L	Sector 37 Wolf Lake Low SFC to FL230	AM	Aircraft
307.375		BM		ZAU37 OLK-L	Sector 37 Wolf Lake Low SFC to FL230	AM	Aircraft

Goshen, IN - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
127.550		BM	CSQ	ZAU80 KELOG	Sector 80 KELOG Low	AM	Aircraft
128.800		BM	CSQ	ZAU31 GSH-L	Sector 31 Goshen Low (Normally combined at ZAU37)	AM	Aircraft
307.175		BM		ZAU80 KELOG	Sector 80 KELOG Low	AM	Aircraft
314.000		BM		ZAU31 GSH-L	Sector 31 Goshen Low (Normally combined at ZAU37)	AM	Aircraft

Niles, IN - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
124.825		BM	CSQ	ZAU36 FWA-H	Sector 36 Fort Wayne Hi FL240-340	AM	Aircraft
126.325		BM	CSQ	ZAU33 BURBN	Sector 33 BURBN Super Hi FL350 & Abv	AM	Aircraft
322.525		BM		ZAU36 FWA-H	Sector 36 Fort Wayne Hi FL240-340	AM	Aircraft
323.050		BM		ZAU33 BURBN	Sector 33 BURBN Super Hi FL350 & Abv	AM	Aircraft

Rossville, IN - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
120.975		BM	CSQ	ZAU32 OKK-L	Sector 32 Kokomo Low SFC to FL230	AM	Aircraft
125.375		BM	CSQ	ZAU34 LOGAN	Sector 34 LOGAN Hi FL240-340	AM	Aircraft
341.700		BM		ZAU34 LOGAN	Sector 34 LOGAN Hi FL240-340	AM	Aircraft
350.350		BM		ZAU32 OKK-L	Sector 32 Kokomo Low Spare Freq	AM	Aircraft
370.850		BM		ZAU32 OKK-L	Sector 32 Kokomo Low SFC to FL230	AM	Aircraft

Iowa RCAG Sites

Burlington, IA - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
135.600		BM	CSQ	ZAU55 BRL-L	Sector 55 Burlington Low	AM	Aircraft
370.950		BM		ZAU55 BRL-L	Sector 55 Burlington Low	AM	Aircraft

Cedar Rapids, IA - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
132.800		BM	CSQ	ZAU56 OTM-L	Sector 56 Ottumwa Low SFC to FL230	AM	Aircraft
135.975		BM	CSQ	ZAU95 AWG-SH	Sector 95 Washington Super Hi	AM	Aircraft
328.400		BM		ZAU56 OTM-L	Sector 56 Ottumwa Low SFC to FL230	AM	Aircraft
335.550		BM		ZAU95 AWG-SH	Sector 95 Washington Super Hi	AM	Aircraft

Davenport, IA - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
125.625		BM	CSQ	ZAU Spare	Sector 90/91 Choke Point Spare	AM	Aircraft
281.525		BM		ZAU Spare	Sector 90/91 Choke Point Spare	AM	Aircraft

Des Moines, IA - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
127.050		BM	CSQ	ZAU SW/WKLD	Spare Freq for SW ZAU Area	AM	Aircraft
282.350		BM		ZAU SW/WKLD	Spare Freq for SW ZAU Area	AM	Aircraft

Dubuque, IA - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
118.425		BM	CSQ	ZAU75 COTON	Sector 75 COTON Hi FL240-320	AM	Aircraft
125.225		BM	CSQ	ZAU76 ARL-H	Sector 76 Arlington Hi FL330-360	AM	Aircraft
127.775		BM	CSQ	ZAU75 COTON	Sector 75 COTON Hi FL240-320	AM	Aircraft
133.950		BM	CSQ	ZAU63 DBQ-L	Sector 63 Dubuque Low SFC to FL230	AM	Aircraft
281.400		BM		ZAU63 DBQ-L	Sector 63 Dubuque Low SFC to FL230	AM	Aircraft
322.475		BM		ZAU76 ARL-H	Sector 76 Arlington Hi FL330-360	AM	Aircraft
327.150		BM		ZAU75 COTON	Sector 75 COTON Hi FL240-320	AM	Aircraft

Ottumwa, IA - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
118.150		BM	CSQ	ZAU56 OTM-L	Sector 56 Ottumwa Low	AM	Aircraft
354.100		BM		ZAU56 OTM-L	Sector 56 Ottumwa Low	AM	Aircraft

Washington, IA - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
125.575		BM	CSQ	ZAU94 IOW-SH	Sector 94 Iowa City Super Hi	AM	Aircraft
128.525		BM	CSQ	ZAU90 LOWLI	Sector 90 LOWLI Hi	AM	Aircraft
134.325		BM	CSQ	ZAU91 HNC-SH	Sector 91 Hanna City Super Hi	AM	Aircraft
236.775		BM		ZAU91 HNC-SH	Sector 91 Hanna City Super Hi	AM	Aircraft
257.725		BM		ZAU94 IOW-SH	Sector 94 Iowa City Super Hi	AM	Aircraft
319.200		BM		ZAU90 LOWLI	Sector 90 LOWLI Hi	AM	Aircraft

Michigan RCAG Sites

Grand Rapids, MI - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
126.125		BM	CSQ	ZAU25 PMM-H	Sector 25 Pullman Hi FL200-320	AM	Aircraft
319.100		BM		ZAU25 PMM-H	Sector 25 Pullman Hi FL200-320	AM	Aircraft

Jones, MI - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
120.225		BM	CSQ	ZAU85 LGR-SH	Sector 85 LaGrange Super Hi	AM	Aircraft
125.975		BM	CSQ	ZAU23 EMP-SH	Sector 23 Empire Super Hi FL330 & Abv	AM	Aircraft
126.475		BM	CSQ	ZAU89 GIJ-H	Sector 89 Gipper Hi	AM	Aircraft
127.625		BM	CSQ	ZAU88 ELX-H	Sector 88 Keeler Hi FL240-330	AM	Aircraft
269.350		BM		ZAU85 LGR-SH	Sector 85 LaGrange Super Hi	AM	Aircraft
273.600		BM		ZAU88 ELX-H	Sector 88 Keeler Hi FL240-330	AM	Aircraft
317.575		BM		ZAU23 EMP-SH	Sector 23 Empire Super Hi FL330 & Abv	AM	Aircraft
353.625		BM		ZAU89 GIJ-H	Sector 89 Gipper Hi	AM	Aircraft

Muskegon, MI - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
132.275		BM	CSQ	ZAU24 3FM-H	Sector 24 Freemont Hi FL200-330	AM	Aircraft
254.350		BM		ZAU24 3FM-H	Sector 24 Freemont Hi FL200-330	AM	Aircraft

Pullman, MI - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
128.500		BM	CSQ	ZAU22 SPARTA	Sector 22 Sparta Low SFC to FL190	AM	Aircraft
273.525		BM		ZAU22 SPARTA	Sector 22 Sparta Low SFC to FL190	AM	Aircraft

Wisconsin RCAG Sites

Horicon, WI - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
121.375		BM	CSQ	ZAU61 QHZ-SH	Sector 61 Horicon Super Hi FL340 & Abv	AM	Aircraft
126.875		BM	CSQ	ZAU60 BAE-H	Sector 60 Badger Hi FL240-FL330	AM	Aircraft
135.550		BM	CSQ	ZAU SPARE	Spare Workload Freq for North Area	AM	Aircraft
269.075		BM		ZAU60 BAE-H	Sector 60 Badger Hi FL240-FL330	AM	Aircraft
282.275		BM		ZAU61 QHZ-SH	Sector 61 Horicon Super Hi FL340 & Abv	AM	Aircraft
306.975		BM		ZAU SPARE	Spare Workload Freq for North Area	AM	Aircraft

Lone Rock, WI - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
133.300		BM	CSQ	ZAU64 LNR-L	Sector 64 Lone Rock Low SFC to FL230	AM	Aircraft
257.925		BM		ZAU64 LNR-L	Sector 64 Lone Rock Low SFC to FL230	AM	Aircraft

Milwaukee, WI - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
123.825		BM	CSQ	ZAU62 HARLY	Sector 62 Harley Low SFC to FL230	AM	Aircraft
125.100		BM	CSQ	ZAU27 SQUIB	Sector 27 SQUIB Low SFC to FL230	AM	Aircraft
290.475		BM		ZAU27 SQUIB	Sector 27 SQUIB Low SFC to FL230	AM	Aircraft
291.700		BM		ZAU62 HARLY	Sector 62 Harley Low SFC to FL230	AM	Aircraft

Oshkosh, WI - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
132.100		BM	CSQ	ZAU64 LNR-L	Sector 64 Lone Rock Low	AM	Aircraft
319.250		BM		ZAU64 LNR-L	Sector 64 Lone Rock Low	AM	Aircraft

Sullivan, WI - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
128.175		BM	CSQ	ZAU SPARE	Spare Workload Freq for North Area	AM	Aircraft
343.725		BM		ZAU SPARE	Spare Workload Freq for North Area	AM	Aircraft

Volk Field, WI - RCAG

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
125.050		BM	CSQ	ZAU64 LNR-L	Sector 64 Lone Rock Low SFC to FL230 (SPARE FREQ)	AM	Aircraft
269.375		BM		ZAU64 LNR-L	Sector 64 Lone Rock Low SFC to FL230 (SPARE FREQ)	AM	Aircraft