ARTCC Centers - ZAU Chicago Center
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| Ultra High Altitude | |||
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| Sector | VHF | UHF | RCAG |
| SECTOR 23 | 125.9750 | 254.3000 | JONES |
| SECTOR 33 | 126.3250 | 296.1000 | FORT WAYNE (FWA) |
| SECTOR 61 | 132.2250 | 327.8000 | HORICON (QHZ) |
| SECTOR 76 | 125.2250 | 285.5000 | DUBUQUE (DBQ) |
| SECTOR 85 | 120.2250 | 269.3500 | JONES |
| SECTOR 95 | 120.3750 | 279.6500 | ROCKFORD (RFD) |
| ASOS | 120.1750 | 377.2000 | MILFORD |
| High Altitude | |||
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| Sector | VHF | UHF | RCAG |
| SECTOR 24 | 132.2700 | 254.3500 | MUSKEGON (MKG) |
| SECTOR 25 | 126.1250 | 319.1000 | GRAND RAPIDS (GRR) |
| SECTOR 34 | 120.9750 | 343.9500 | ROSSVILLE |
| SECTOR 52 | 135.8250 | 385.6500 | MOLINE (MZV) |
| SECTOR 60 | 132.7500 | 263.0000 | HORICON (QHZ) |
| SECTOR 75 | 127.7750 | 343.6000 | DUBUQUE (DBQ) |
| SECTOR 82 | 135.3500 | 273.6000 | SOUTH BEND (SBN) |
| SECTOR 83 | 118.2250 | 353.5500 | KANKAKEE (IKK) |
| SECTOR 94 | 120.3750 | 279.6500 | ROCKFORD (RFD) |
| 364.8000 | DOWNERS GROVE | ||
| 132.5000 | MILFORD | ||
| 135.4000 | MILFORD | ||
| 353.8000 | MILFORD | ||
| 133.4250 | 360.7500 | MONEE | |
| 350.3500 | ROSSVILLE | ||
| Low Altitude Frequencies | |||
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| Sector | VHF | UHF | RCAG |
| SECTOR 14 | 125.0500 | 269.6500 | VOLK FLD |
| SECTOR 22 | 128.5000 | 269.6000 | PULLMAN (PMM) |
| SECTOR 22 | 134.9500 | 287.9000 | GRAND RAPIDS (GRR) |
| SECTOR 26 | 133.2000 | 360.8000 | CROWN POINT |
| SECTOR 27 | 125.1000 | 323.1000 | MILWAUKEE (MKE) |
| SECTOR 31 | 135.9000 | 317.6000 | FORT WAYNE (FWA) |
| SECTOR 32 | 125.3750 | 370.8500 | PULLMAN (PMM) |
| SECTOR 35 | 127.8000 | 387.0500 | CROWN POINT |
| SECTOR 37 | 119.8500 | 362.3000 | FORT WAYNE (FWA) |
| SECTOR 41 | 132.9500 | 272.7000 | CHICAGO HEIGHTS (CGT) |
| SECTOR 42 | 135.7500 | 353.9500 | DANVILLE (DNV) |
| SECTOR 43 | 132.5000 | 258.1000 | KANKAKEE (IKK) |
| SECTOR 44 | 120.1250 | 256.8000 | KANKAKEE (IKK) |
| SECTOR 50 | 123.7500 | 354.0000 | AURORA |
| SECTOR 54 | 119.2250 | 307.2500 | LEROY |
| SECTOR 55 | 118.7500 | 351.7000 | MOLINE (MZV) |
| SECTOR 55 | 135.6000 | 316.1000 | BURLINGTON (BRL) |
| SECTOR 55 | 135.6000 | 370.9500 | BURLINGTON (BRL) |
| SECTOR 56 | 118.9000 | 251.1500 | WATERLOO (ALO) |
| SECTOR 56 | 132.8000 | 328.4000 | CEDAR RAPIDS (CID) |
| SECTOR 62 | 132.3000 | 360.6000 | MILWAUKEE (MKE) |
| SECTOR 64 | 133.3000 | 380.3500 | LONE ROCK (LNR) |
| SECTOR 65 | 127.0000 | 387.1000 | OSHKOSH (OSH) |
| SECTOR 65 | 132.1000 | 319.2500 | OSHKOSH (OSH) |
| SECTOR 73 | 133.9500 | 281.4000 | DUBUQUE (DBQ) |
| SECTOR 74 | 133.3500 | 381.4000 | HAMPSHIRE |
| SECTOR 77 | 127.0750 | 299.7000 | MAPLE PARK |
| SECTOR 80 | 127.5500 | 263.1000 | FORT WAYNE (FWA) |
| SECTOR 81 | 120.3500 | 317.4000 | CROWN POINT |
| 127.6000 | 363.2000 | DOWNERS GROVE | |
| 135.7500 | 338.3000 | DOWNERS GROVE | |
| 135.5500 | 343.9000 | HORICON (QHZ) | |
| 123.8500 | 393.0000 | LAFAYETTE | |
| 125.0500 | 284.7000 | MILFORD | |
| 127.4500 | MILFORD | ||
| 134.7500 | MILWAUKEE (MKE) | ||
| 291.7000 | MILWAUKEE (MKE) | ||
| 364.8000 | MILWAUKEE (MKE) | ||
| 125.2000 | |||
| Other Frequencies | |||
|---|---|---|---|
| Description | VHF | UHF | RCAG |
| SPECIAL USE | 128.6500 | 298.9000 | CROWN POINT |
| SPECIAL USE | 134.2000 | 348.7000 | HAMPSHIRE |
| SPECIAL USE | 133.9000 | FORT WAYNE (FWA) | |