Universal Licensing System
KNJX503
MEHLVILLE SCHOOL DISTRICT R9
License details
| ULS identifier | 1775667 |
|---|
| Call sign | KNJX503 |
|---|
| Radio service | IG |
|---|
| Status | A |
|---|
| Grant date | 2025-05-01 |
|---|
| Expiration | 2035-05-05 |
|---|
| Frequency range | 451.45 - 466.175 MHz (14 frequencies) |
|---|
| Locations | 1 |
|---|
| Representative location | ST. LOUIS, ST. LOUIS, MO |
|---|
| Coordinates | 38.4717222, -90.3220556 |
|---|
| Source archive | l_LMpriv.zip |
|---|
| Dataset refreshed | 2026-08-02 01:10:43 |
|---|
Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
|---|
| 2 | 1 | FB2 | 451.45000000 | | | 100.000000 | 150.000000 | |
| 5 | 1 | MO | 451.45000000 | | | 40.000000 | 40.000000 | |
| 6 | 1 | MO | 456.31250000 | | | 4.000000 | 4.000000 | |
| 6 | 1 | MO | 456.36250000 | | | 4.000000 | 4.000000 | |
| 6 | 1 | MO | 456.38750000 | | | 4.000000 | 4.000000 | |
| 3 | 1 | FX1 | 456.45000000 | | | 40.000000 | 40.000000 | |
| 5 | 1 | MO | 456.45000000 | | | 40.000000 | 40.000000 | |
| 6 | 1 | MO | 456.66250000 | | | 4.000000 | 4.000000 | |
| 6 | 1 | MO | 456.71250000 | | | 4.000000 | 4.000000 | |
| 6 | 1 | MO | 456.73750000 | | | 4.000000 | 4.000000 | |
| 6 | 1 | MO | 457.13750000 | | | 4.000000 | 4.000000 | |
| 6 | 1 | MO | 457.41250000 | | | 4.000000 | 4.000000 | |
| 6 | 1 | MO | 457.66250000 | | | 4.000000 | 4.000000 | |
| 6 | 1 | MO | 457.83750000 | | | 4.000000 | 4.000000 | |
| 1 | 1 | FB4 | 461.17500000 | | | 70.000000 | 180.000000 | |
| 3 | 1 | FX1 | 466.17500000 | | | 10.000000 | 10.000000 | |
| 4 | 1 | MO | 466.17500000 | | | 10.000000 | 10.000000 | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 2 | 1 | 451.45000000 | | 11K2F3E |
| 2 | 1 | 451.45000000 | | 7K60FXE |
| 5 | 1 | 451.45000000 | | 11K2F3E |
| 5 | 1 | 451.45000000 | | 7K60FXE |
| 6 | 1 | 456.31250000 | | 11K2F3E |
| 6 | 1 | 456.36250000 | | 11K2F3E |
| 6 | 1 | 456.38750000 | | 11K2F3E |
| 3 | 1 | 456.45000000 | | 11K2F3E |
| 5 | 1 | 456.45000000 | | 11K2F3E |
| 5 | 1 | 456.45000000 | | 7K60FXE |
| 6 | 1 | 456.66250000 | | 11K2F3E |
| 6 | 1 | 456.71250000 | | 11K2F3E |
| 6 | 1 | 456.73750000 | | 11K2F3E |
| 6 | 1 | 457.13750000 | | 11K2F3E |
| 6 | 1 | 457.41250000 | | 11K2F3E |
| 6 | 1 | 457.66250000 | | 11K2F3E |
| 6 | 1 | 457.83750000 | | 11K2F3E |
| 1 | 1 | 461.17500000 | | 11K2F3E |
| 3 | 1 | 466.17500000 | | 11K2F3E |
| 4 | 1 | 466.17500000 | | 11K2F3E |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | 5490 BUTLER HILL RD, ST LOUIS, ST. LOUIS, MO | 38.48227778, -90.39816667 | 176.000 m | TOWER | 327.000 m structure / 327.000 m overall | N |
| 2 | T | 5557 MILBURN RD, ST LOUIS, ST. LOUIS, MO | 38.47172222, -90.32205556 | 162.000 m | B | 15.000 m structure / 15.000 m overall | N |
| 3 | T | MO | | | | | |
| 4 | T | | | | | | |
| 5 | T | | | | | | |
| 6 | | ST. LOUIS, ST. LOUIS, MO | 38.47172222, -90.32205556 | | | | N |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | T | | 250.000 m | | | | 261.000 | |
| 1 | 2 | T | | 15.000 m | | | | 25.000 | |
| 1 | 3 | T | | | | | | | |
| 1 | 4 | T | | | | | | | |
| 1 | 5 | T | | | | | | | |
| 1 | 6 | T | | | | | | | |
Control points
| Number | Address | County | Phone |
|---|
| 1 | 3120 LEMAY FERRY RD, MEHLVILLE, MO | ST. LOUIS | 3148925000 |
License history
| Date | File or call sign | Action |
|---|
| 2025-05-01 | KNJX503 | LIREN |
| 2025-02-10 | KNJX503 | LETRES |
| 2015-04-29 | KNJX503 | LIREN |
| 2015-03-12 | KNJX503 | LIMOD |
| 2015-02-09 | KNJX503 | LETRES |
| 2013-04-15 | KNJX503 | LTSAPR |
| 2013-04-13 | KNJX503 | LIAUA |
| 2013-03-19 | KNJX503 | LETCNS |
| 2012-06-19 | KNJX503 | LIMOD |
| 2005-02-24 | KNJX503 | LIREN |
| 2005-02-24 | KNJX503 | LTSAPR |
| 2005-02-07 | KNJX503 | LETRES |
| 2001-10-12 | KNJX503 | AUDOPR |
| 2000-11-23 | KNJX503 | LICCNV |
| 2000-05-08 | KNJX503 | AUTHPR |
| 2000-05-05 | KNJX503 | LIMOD |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 1775667 | 2026-08-02 01:10:43 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | KNJX503 | ULS 1775667 | 2026-08-02 01:10:43 |
| Status | A | ULS 1775667 | 2026-08-02 01:10:43 |
| Service | IG | ULS 1775667 | 2026-08-02 01:10:43 |
| Grant Date | 2025-05-01 | ULS 1775667 | 2026-08-02 01:10:43 |
| Expiration Date | 2035-05-05 | ULS 1775667 | 2026-08-02 01:10:43 |