| Cook County | Sheriff | 41.87774 | -87.76428 | 31.05 |
| Cook County | Cook County Interoperability | 41.859 | -87.807 | 30 |
| Cook County | Cook County Highway Department | 41.87774 | -87.76428 | 31.05 |
| Cook County | Forest Preserve District of Cook County | 41.87774 | -87.76428 | 31.05 |
| Cook County | Cook County Miscellaneous | 41.859 | -87.807 | 30 |
| Chicago | Chicago Police Department (CPD) | 41.87774 | -87.76428 | 14.77 |
| Chicago | Chicago Fire Department / EMS | 41.87774 | -87.76428 | 14.77 |
| Chicago | Citywide - Interoperability | 41.87774 | -87.54318 | 14.77 |
| Chicago | Chicago Office of Emergency Management and Communications (OEMC) | 41.87774 | -87.76428 | 14.77 |
| Chicago | Chicago Department of Transportation | 41.87774 | -87.76428 | 14.77 |
| Chicago | Chicago Park District | 41.87774 | -87.76428 | 14.77 |
| Chicago | Chicago Public Works | 41.87774 | -87.76428 | 14.77 |
| Chicago | Chicago Housing Authority (CHA) | 41.87774 | -87.76428 | 14.77 |
| Chicago | Public Building Commission of Chicago | 41.87774 | -87.76428 | 14.77 |
| Consolidated Dispatch Centers | Calumet Park Regional Dispatch Center (CalComm) | 41.62985 | -87.64434 | 5 |
| Consolidated Dispatch Centers | Central Dispatch (Dolton) | 41.5821 | -87.58941 | 6 |
| Consolidated Dispatch Centers | Cicero Consolidated Dispatch (CCD) | 41.84546 | -87.75718 | 5 |
| Consolidated Dispatch Centers | Cook County Suburban Telecommunications Networks (Police) | 41.87774 | -87.76428 | 31.05 |
| Consolidated Dispatch Centers | E-COM Dispatch Center (Homewood) | 41.87774 | -87.76428 | 31.05 |
| Consolidated Dispatch Centers | Eisenhower Emergency Communications | 41.87072 | -87.84684 | 2 |
| Consolidated Dispatch Centers | Glenview Public Safety Dispatch Center | 42.067 | -87.786 | 9.07 |
| Consolidated Dispatch Centers | Hickory Hills Consolidated Dispatch Center | 41.7529 | -87.77644 | 4.7 |
| Consolidated Dispatch Centers | Lyons Township Area Communications Center - LTACC (La Grange) | 41.81467 | -87.87374 | 4 |
| Consolidated Dispatch Centers | Mutual Aid Box Alarm System (MABAS) | 41.859 | -87.807 | 30.19 |
| Consolidated Dispatch Centers | NORCOMM Public Safety Communications / MABAS Division 20 (Franklin Park) | 41.87774 | -87.76428 | 12 |
| Consolidated Dispatch Centers | North Regional Telecommunications Network - Norcom | 41.87774 | -87.76428 | 31.05 |
| Consolidated Dispatch Centers | Northwest Central Dispatch System (NWCDS) | 41.87774 | -87.76428 | 31.05 |
| Consolidated Dispatch Centers | Oak Lawn Regional Emergency Communications (OLREC) | 41.87774 | -87.76428 | 31.05 |
| Consolidated Dispatch Centers | Orland Central Dispatch | 41.87774 | -87.76428 | 31.05 |
| Consolidated Dispatch Centers | Regional Emergency Dispatch - RED Center (Northbrook) | 41.87774 | -87.76428 | 31.05 |
| Consolidated Dispatch Centers | SouthCom Dispatch (Matteson) | 41.87774 | -87.76428 | 31.05 |
| Consolidated Dispatch Centers | Southwest Central Dispatch - SWCD (Palos Heights) | 41.87774 | -87.76428 | 31.05 |
| Consolidated Dispatch Centers | West Suburban Consolidated Dispatch Center - WestCom (River Forest) | 41.90203 | -87.79477 | 3.5 |
| Consolidated Dispatch Centers | West Central Consolidated Communications - WC3 (North Riverside) | 41.81512 | -87.82973 | 3.6 |
| Municipalities and Districts | Alsip | 41.66892 | -87.73866 | 1.5 |
| Municipalities and Districts | Arlington Heights | 42.08836 | -87.98063 | 2 |
| Municipalities and Districts | Barrington | 42.15391 | -88.13619 | 3 |
| Municipalities and Districts | Barrington Countryside Fire Protection District | 42.1823 | -88.16709 | 5 |
| Municipalities and Districts | Barrington Hills | 42.14475 | -88.15563 | 3 |
| Municipalities and Districts | Bartlett | 41.99503 | -88.18563 | 2 |
| Municipalities and Districts | Bedford Park | 41.76281 | -87.80006 | 3 |
| Municipalities and Districts | Bellwood | 41.88142 | -87.88312 | 3 |
| Municipalities and Districts | Bensenville | 41.95503 | -87.94007 | 4 |
| Municipalities and Districts | Berkeley | 41.88892 | -87.9034 | 2 |
| Municipalities and Districts | Berwyn | 41.85059 | -87.79367 | 2 |
| Municipalities and Districts | Blue Island | 41.65726 | -87.68005 | 2 |
| Municipalities and Districts | Bridgeview | 41.75003 | -87.80422 | 2 |
| Municipalities and Districts | Broadview | 41.86392 | -87.85339 | 2 |
| Municipalities and Districts | Brookfield | 41.82392 | -87.85173 | 2 |
| Municipalities and Districts | Buffalo Grove | 42.15141 | -87.95979 | 2 |
| Municipalities and Districts | Burbank | 41.73392 | -87.7795 | 2 |
| Municipalities and Districts | Burnham | 41.63892 | -87.55671 | 2 |
| Municipalities and Districts | Burr Ridge | 41.74892 | -87.91839 | 2 |
| Municipalities and Districts | Calumet City | 41.61559 | -87.52949 | 2 |
| Municipalities and Districts | Calumet Park | 41.66281 | -87.6606 | 2 |
| Municipalities and Districts | Central Stickney Fire Protection District | 41.82142 | -87.78283 | 2 |
| Municipalities and Districts | Chicago Heights | 41.50615 | -87.6356 | 3 |
| Municipalities and Districts | Chicago Ridge | 41.70142 | -87.77922 | 2 |
| Municipalities and Districts | Cicero | 41.84559 | -87.75394 | 2 |
| Municipalities and Districts | Country Club Hills | 41.56809 | -87.72033 | 2.5 |
| Municipalities and Districts | Countryside | 41.78281 | -87.87811 | 2 |
| Municipalities and Districts | Crestwood | 41.64727 | -87.73783 | 2 |
| Municipalities and Districts | Deer Park | 42.16086 | -88.08147 | 3 |
| Municipalities and Districts | Deerfield | 42.17114 | -87.84451 | 2 |
| Municipalities and Districts | Des Plaines | 42.03336 | -87.8834 | 2 |
| Municipalities and Districts | Dixmoor | 41.6317 | -87.66088 | 2 |
| Municipalities and Districts | Dolton | 41.63892 | -87.60727 | 2 |
| Municipalities and Districts | East Dundee | 42.09891 | -88.27147 | 2 |
| Municipalities and Districts | East Hazel Crest | 41.57365 | -87.64643 | 2 |
| Municipalities and Districts | Elgin | 42.03725 | -88.28119 | 4 |
| Municipalities and Districts | Elk Grove Rural Fire Protection District | 42.00392 | -87.97035 | 4 |
| Municipalities and Districts | Elk Grove Village | 42.00392 | -87.97035 | 2 |
| Municipalities and Districts | Elmwood Park | 41.92114 | -87.80923 | 2 |
| Municipalities and Districts | Evanston | 42.04114 | -87.69006 | 2 |
| Municipalities and Districts | Evergreen Park | 41.72059 | -87.70172 | 2 |
| Municipalities and Districts | Flossmoor | 41.54281 | -87.68477 | 2 |
| Municipalities and Districts | Ford Heights | 41.50642 | -87.59171 | 2 |
| Municipalities and Districts | Forest Park | 41.54586 | -88.05645 | 2 |
| Municipalities and Districts | Forest View | 41.80864 | -87.79339 | 2 |
| Municipalities and Districts | Frankfort | 41.49587 | -87.84866 | 2 |
| Municipalities and Districts | Franklin Park | 41.93531 | -87.86562 | 2 |
| Municipalities and Districts | Garden Homes | 41.734 | -87.622 | 1 |
| Municipalities and Districts | Glencoe | 42.13503 | -87.75812 | 2 |
| Municipalities and Districts | Glenview | 42.06975 | -87.78784 | 2 |
| Municipalities and Districts | Glenwood | 41.54253 | -87.60227 | 2 |
| Municipalities and Districts | Golf | 42.05892 | -87.79256 | 1 |
| Municipalities and Districts | Harvey | 41.61003 | -87.64671 | 2 |
| Municipalities and Districts | Harwood Heights | 41.96725 | -87.80756 | 2 |
| Municipalities and Districts | Hazel Crest | 41.5717 | -87.69449 | 2 |
| Municipalities and Districts | Hickory Hills | 41.72559 | -87.82506 | 2 |
| Municipalities and Districts | Highland Park | 42.18169 | -87.80034 | 2 |
| Municipalities and Districts | Hillside | 41.87781 | -87.90284 | 2 |
| Municipalities and Districts | Hinsdale | 41.80086 | -87.93701 | 2 |
| Municipalities and Districts | Hodgkins | 41.76892 | -87.85784 | 2 |
| Municipalities and Districts | Hoffman Estates | 42.04281 | -88.0798 | 2 |
| Municipalities and Districts | Hometown | 41.73448 | -87.73144 | 2 |
| Municipalities and Districts | Homewood | 41.55726 | -87.6656 | 2 |
| Municipalities and Districts | Homewood Acres Volunteer Fire Department | 41.55726 | -87.6656 | 2 |
| Municipalities and Districts | Homewood-Flossmoor Park District | 41.54687 | -87.68017 | 2 |
| Municipalities and Districts | Indian Head Park | 41.77031 | -87.90228 | 2 |
| Municipalities and Districts | Inverness | 42.11808 | -88.09619 | 2 |
| Municipalities and Districts | Inverness Fire Protection District | 42.11808 | -88.09619 | 5 |
| Municipalities and Districts | Justice | 41.74448 | -87.83783 | 2 |
| Municipalities and Districts | Kenilworth | 42.08586 | -87.71756 | 2 |
| Municipalities and Districts | La Grange | 39.94727 | -90.53735 | 2 |
| Municipalities and Districts | La Grange Park | 41.83475 | -87.86173 | 2 |
| Municipalities and Districts | Lansing | 41.56476 | -87.53893 | 2 |
| Municipalities and Districts | Lemont | 41.69394 | -88.00324 | 4 |
| Municipalities and Districts | Leyden Township Fire Protection District | 41.93809 | -87.86867 | 4 |
| Municipalities and Districts | Lincolnwood | 42.00448 | -87.73006 | 2 |
| Municipalities and Districts | Lynwood | 41.52642 | -87.53865 | 2 |
| Municipalities and Districts | Lyons | 41.81337 | -87.81811 | 2 |
| Municipalities and Districts | Markham | 41.59365 | -87.69477 | 2 |
| Municipalities and Districts | Matteson | 41.50392 | -87.7131 | 2 |
| Municipalities and Districts | Maywood | 41.8792 | -87.84312 | 2 |
| Municipalities and Districts | McCook | 41.79781 | -87.84478 | 2 |
| Municipalities and Districts | Melrose Park | 41.90059 | -87.85673 | 2 |
| Municipalities and Districts | Merrionette Park | 41.6842 | -87.70033 | 2 |
| Municipalities and Districts | Midlothian | 41.62531 | -87.71755 | 2 |
| Municipalities and Districts | Morton Grove | 42.04059 | -87.78256 | 2 |
| Municipalities and Districts | Mount Prospect | 42.06642 | -87.93729 | 2 |
| Municipalities and Districts | Niles | 42.01892 | -87.80284 | 2 |
| Municipalities and Districts | Norridge | 41.96336 | -87.82728 | 2 |
| Municipalities and Districts | North Maine Fire Protection District | 41.24448 | -88.33173 | 4 |
| Municipalities and Districts | North Palos Fire Protection District | 41.68475 | -87.85311 | 4 |
| Municipalities and Districts | North Riverside | 41.84281 | -87.82311 | 2 |
| Municipalities and Districts | Northbrook | 42.12753 | -87.82895 | 2 |
| Municipalities and Districts | Northfield | 42.09975 | -87.7809 | 2 |
| Municipalities and Districts | Northlake | 41.91725 | -87.89562 | 2 |
| Municipalities and Districts | Norwood Park Fire Protection District (Norridge/Harwood Heights) | 41.96664 | -87.8096 | 4 |
| Municipalities and Districts | Oak Forest | 41.60281 | -87.74394 | 2 |
| Municipalities and Districts | Oak Lawn | 41.71087 | -87.75811 | 2 |
| Municipalities and Districts | Oak Park | 41.88503 | -87.7845 | 2 |
| Municipalities and Districts | Olympia Fields | 41.51337 | -87.67421 | 2 |
| Municipalities and Districts | Orland Fire Protection District | 41.60144 | -87.85294 | 4.5 |
| Municipalities and Districts | Orland Hills | 41.58531 | -87.84311 | 2 |
| Municipalities and Districts | Orland Park | 41.81227 | -87.84668 | 6 |
| Municipalities and Districts | Palatine | 42.1103 | -88.03424 | 2 |
| Municipalities and Districts | Palos Fire Protection District | 41.66685 | -87.85461 | 3.5 |
| Municipalities and Districts | Palos Heights | 41.66809 | -87.79644 | 2 |
| Municipalities and Districts | Palos Hills | 41.6967 | -87.817 | 2 |
| Municipalities and Districts | Palos Park | 41.67291 | -87.83741 | 3 |
| Municipalities and Districts | Park Forest | 41.49142 | -87.67449 | 2 |
| Municipalities and Districts | Park Ridge | 42.01114 | -87.84062 | 2 |
| Municipalities and Districts | Phoenix | 41.61115 | -87.63477 | 1 |
| Municipalities and Districts | Pleasantview Fire Protection District (Countryside) | 41.76158 | -87.89475 | 4 |
| Municipalities and Districts | Posen | 41.6317 | -87.68144 | 1 |
| Municipalities and Districts | Prospect Heights | 42.0953 | -87.93757 | 2.5 |
| Municipalities and Districts | Rich Township | 41.51253 | -87.73227 | 4 |
| Municipalities and Districts | Richton Park | 41.48448 | -87.70338 | 1 |
| Municipalities and Districts | River Forest | 41.89781 | -87.81395 | 1 |
| Municipalities and Districts | River Grove | 41.92586 | -87.83589 | 1.5 |
| Municipalities and Districts | Riverdale | 41.63781 | -87.63117 | 1.5 |
| Municipalities and Districts | Riverside | 41.82642 | -87.81867 | 1 |
| Municipalities and Districts | Robbins | 41.64392 | -87.70366 | 2 |
| Municipalities and Districts | Roberts Park Fire Protection District | 41.72559 | -87.82506 | 4 |
| Municipalities and Districts | Rolling Meadows | 42.06663 | -88.02109 | 2 |
| Municipalities and Districts | Roselle | 41.98475 | -88.07979 | 1 |
| Municipalities and Districts | Rosemont | 41.99531 | -87.88451 | 2 |
| Municipalities and Districts | Sauk Village | 41.48837 | -87.56754 | 1 |
| Municipalities and Districts | Schaumburg | 42.03336 | -88.08341 | 5 |
| Municipalities and Districts | Schiller Park | 41.95586 | -87.8709 | 2 |
| Municipalities and Districts | Skokie | 42.03336 | -87.73339 | 2 |
| Municipalities and Districts | South Barrington | 42.09142 | -88.12174 | 3.5 |
| Municipalities and Districts | South Chicago Heights | 41.48087 | -87.63782 | 2 |
| Municipalities and Districts | South Holland | 41.60087 | -87.60699 | 2 |
| Municipalities and Districts | South Stickney | 41.81073 | -87.78265 | 1 |
| Municipalities and Districts | Steger | 41.47003 | -87.63643 | 1.5 |
| Municipalities and Districts | Steger Estates Fire Protection District | 41.47003 | -87.63643 | 2 |
| Municipalities and Districts | Stickney | 41.82142 | -87.78283 | 2 |
| Municipalities and Districts | Stone Park | 41.90559 | -87.88367 | 1 |
| Municipalities and Districts | Streamwood | 42.02558 | -88.17841 | 3 |
| Municipalities and Districts | Summit | 41.78809 | -87.81033 | 1 |
| Municipalities and Districts | Thornton | 41.56809 | -87.6081 | 2 |
| Municipalities and Districts | Tinley Park | 41.57337 | -87.78449 | 2 |
| Municipalities and Districts | University Park | 41.59226 | -87.68533 | 2 |
| Municipalities and Districts | Westchester | 41.85059 | -87.882 | 2 |
| Municipalities and Districts | Western Springs | 41.80975 | -87.90062 | 1 |
| Municipalities and Districts | Wheeling | 42.13919 | -87.92896 | 3 |
| Municipalities and Districts | Willow Springs | 41.74087 | -87.86033 | 2 |
| Municipalities and Districts | Wilmette | 42.07225 | -87.72284 | 2 |
| Municipalities and Districts | Winnetka | 42.10808 | -87.7359 | 2 |
| Municipalities and Districts | Woodridge | 42.1528 | -87.80923 | 2 |
| Municipalities and Districts | Worth | 41.68975 | -87.79728 | 2 |
| EMS Agencies | Hospitals | 41.859 | -87.807 | 31.05 |
| EMS Agencies | Common/Unidentified | 41.87774 | -87.76428 | 31.05 |
| EMS Agencies | Alverno Ambulance [closed] | 41.87774 | -87.76428 | 31.05 |
| EMS Agencies | Bud's Ambulance (Dolton) | 41.81227 | -87.84668 | 40 |
| EMS Agencies | Chicago Ambulance Alliance | 41.87774 | -87.76428 | 31.05 |
| EMS Agencies | Elite Ambulance | 41.859 | -87.807 | 30 |
| EMS Agencies | Hatzalah Chicago | 41.87774 | -87.76428 | 14.77 |
| EMS Agencies | Lifeline Ambulance (Skokie, Chicago) | 41.87889 | -87.63592 | 25 |
| EMS Agencies | Lifestar Air Ambulance (Joliet) | 41.81227 | -87.84668 | 40 |
| EMS Agencies | Murphy Ambulance (Grayslake) | 42.34447 | -88.04175 | 3 |
| EMS Agencies | Superior Ambulance Service / AIR MED 1 | 41.85729 | -87.85217 | 45 |
| EMS Agencies | University of Chicago Aeromedical Network (UCAN) | 41.859 | -87.807 | 50 |
| Miscellaneous Agencies | American Red Cross (Chicago) | 41.81227 | -87.84668 | 30.19 |
| Miscellaneous Agencies | Townships and Water Districts | 41.81227 | -87.84668 | 30.19 |
| Miscellaneous Agencies | 5th District SWAT Team | 41.87774 | -87.76428 | 31.05 |
| Miscellaneous Agencies | Des Plaines Valley Mosquito Abatement District | 42.02614 | -87.71589 | 3 |
| Miscellaneous Agencies | Northwest Mosquito Abatement District (Wheeling) | 42.12336 | -87.91978 | 5 |
| Miscellaneous Agencies | South Cook County Mosquito Abatement District | 41.81227 | -87.84668 | 40 |
| Miscellaneous Agencies | Metropolitan Water Reclamation District (Hanover Park/Skokie) | 42.02614 | -87.71589 | 5 |
| Miscellaneous Agencies | Police/Fire Support Organizations | 41.87774 | -87.76428 | 31.05 |
| Schools and Colleges | All | 41.859 | -87.807 | 30 |
| State of Illinois | James R. Thompson Center (Chicago) | 41.886 | -87.632 | 0.08 |
| Amateur Radio | Severe Weather and Emergency Ops | 41.859 | -87.807 | 30 |
| Amateur Radio | 6m Repeaters | 41.859 | -87.807 | 30 |
| Amateur Radio | 2m Repeaters | 41.859 | -87.807 | 30 |
| Amateur Radio | 1.25 Meters | 41.859 | -87.807 | 30 |
| Amateur Radio | 70 cm (440 MHz) Repeaters | 41.859 | -87.807 | 30 |
| Amateur Radio | Chicago FM Club (CFMC) | 41.87774 | -87.76428 | 33 |
| Amateur Radio | North Shore Radio Club | 41.87774 | -87.76428 | 31.05 |
| Amateur Radio | Polish-American Radio Operators Society (PAAROS) | 41.859 | -87.807 | 30 |
| Amateur Radio | D-STAR (Northern Cook) | 42.026 | -87.862 | 21.43 |
| Amateur Radio | Packet (Data) | 41.87774 | -87.76428 | 31.05 |
