Universal Licensing System
KNNN204
ILLINOIS STATE POLICE
License details
| ULS identifier | 1215676 |
|---|
| Call sign | KNNN204 |
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| Radio service | PW |
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| Status | A |
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| Grant date | 2020-12-02 |
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| Expiration | 2031-03-01 |
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| Frequency range | 453.275 - 458.875 MHz (4 frequencies) |
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| Locations | 2 |
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| Representative location | TAMMS, ALEXANDER, IL |
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| Coordinates | 37.2481111, -89.2795278 |
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| Source archive | l_LMpriv.zip |
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| Dataset refreshed | 2026-08-02 01:13:20 |
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Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
|---|
| 2 | 1 | FB | 453.27500000 | | | 25.000000 | 57.000000 | |
| 2 | 2 | FB2 | 453.27500000 | | | 25.000000 | 40.000000 | |
| 3 | 1 | MO | 453.27500000 | | | 100.000000 | | |
| 2 | 1 | FB | 453.87500000 | | | 25.000000 | 57.000000 | |
| 2 | 1 | FX1 | 458.27500000 | | | 25.000000 | 57.000000 | |
| 3 | 1 | MO | 458.27500000 | | | 100.000000 | | |
| 2 | 1 | FX1 | 458.87500000 | | | 25.000000 | 57.000000 | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 2 | 1 | 453.27500000 | | 11K2F3E |
| 2 | 2 | 453.27500000 | | 11K2F3E |
| 3 | 1 | 453.27500000 | | 11K2F3E |
| 2 | 1 | 453.87500000 | | 11K2F3E |
| 2 | 1 | 458.27500000 | | 11K2F3E |
| 3 | 1 | 458.27500000 | | 11K2F3E |
| 2 | 1 | 458.87500000 | | 11K2F3E |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 2 | T | 200 E SUPERMAX RD, TAMMS, ALEXANDER, IL | 37.24811111, -89.27952778 | 105.000 m | B | 8.000 m structure / 9.000 m overall | N |
| 3 | T | | | | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 2 | T | | 9.000 m | | | | -11.000 | |
| 1 | 3 | T | | | | | | | |
| 2 | 2 | T | | 31.000 m | | | | 11.000 | |
Control points
| Number | Address | County | Phone |
|---|
| 1 | 1301 Concordia Court, Springfield, IL | SANGAMON | 2175582200 |
License history
| Date | File or call sign | Action |
|---|
| 2026-06-02 | KNNN204 | LIAUA |
| 2021-07-24 | KNNN204 | LIAUA |
| 2021-06-23 | KNNN204 | LIAUA |
| 2020-12-02 | KNNN204 | LIREN |
| 2014-08-28 | KNNN204 | LIAUA |
| 2014-08-27 | KNNN204 | ESUAPR |
| 2013-02-22 | KNNN204 | LIMOD |
| 2013-02-21 | KNNN204 | ESUAPR |
| 2012-04-17 | KNNN204 | LIAUA |
| 2012-04-16 | KNNN204 | ESUAPR |
| 2010-12-08 | KNNN204 | LIREN |
| 2010-12-06 | KNNN204 | LETRES |
| 2010-12-01 | KNNN204 | ESURNW |
| 2010-09-21 | KNNN204 | LIMOD |
| 2010-07-09 | KNNN204 | ESUAPR |
| 2010-02-12 | KNNN204 | LIAUA |
| 2010-02-11 | KNNN204 | ESUAPR |
| 2009-02-25 | KNNN204 | LIAUA |
| 2009-02-24 | KNNN204 | ESCAPR |
| 2002-04-30 | KNNN204 | AUDOPR |
| 2000-12-21 | KNNN204 | LIREN |
| 2000-12-03 | KNNN204 | LETRES |
| 2000-10-20 | KNNN204 | LICCNV |
| 1996-03-01 | KNNN204 | LIISS |
| 1996-03-01 | KNNN204 | AUTHPR |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 1215676 | 2026-08-02 01:13:20 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | KNNN204 | ULS 1215676 | 2026-08-02 01:13:20 |
| Status | A | ULS 1215676 | 2026-08-02 01:13:20 |
| Service | PW | ULS 1215676 | 2026-08-02 01:13:20 |
| Grant Date | 2020-12-02 | ULS 1215676 | 2026-08-02 01:13:20 |
| Expiration Date | 2031-03-01 | ULS 1215676 | 2026-08-02 01:13:20 |