Universal Licensing System
WPMD350
TTWN Networks, LLC
License details
| ULS identifier | 1145725 |
|---|
| Call sign | WPMD350 |
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| Radio service | RP |
|---|
| Status | A |
|---|
| Grant date | 2021-12-03 |
|---|
| Expiration | 2029-12-01 |
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| Frequency range | 450.15 - 455.5125 MHz (6 frequencies) |
|---|
| Locations | 1 |
|---|
| Representative location | CHICAGO, COOK, IL |
|---|
| Coordinates | 41.8789167, -87.6361667 |
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| Source archive | l_LMbcast.zip |
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| Dataset refreshed | 2026-08-02 00:37:43 |
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Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
|---|
| 1 | 1 | FB2 | 450.15000000 | | | 100.000000 | 75.000000 | |
| 2 | 1 | MO | 450.15000000 | | | 100.000000 | 75.000000 | |
| 1 | 1 | FB2 | 450.28750000 | | | 100.000000 | 75.000000 | |
| 2 | 1 | MO | 450.28750000 | | | 100.000000 | 75.000000 | |
| 1 | 1 | FB2 | 450.51250000 | | | 100.000000 | 75.000000 | |
| 2 | 1 | MO | 450.51250000 | | | 100.000000 | 75.000000 | |
| 1 | 1 | FB2 | 455.15000000 | | | 100.000000 | 75.000000 | |
| 2 | 1 | MO | 455.15000000 | | | 100.000000 | 75.000000 | |
| 1 | 2 | FB2 | 455.28750000 | | | 100.000000 | 75.000000 | |
| 2 | 1 | MO | 455.28750000 | | | 100.000000 | 75.000000 | |
| 1 | 1 | FB2 | 455.51250000 | | | 100.000000 | 75.000000 | |
| 2 | 1 | MO | 455.51250000 | | | 100.000000 | 75.000000 | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 1 | 450.15000000 | | 20K0F3E |
| 2 | 1 | 450.15000000 | | 20K0F3E |
| 1 | 1 | 450.28750000 | | 20K0F3E |
| 2 | 1 | 450.28750000 | | 20K0F3E |
| 1 | 1 | 450.51250000 | | 20K0F3E |
| 2 | 1 | 450.51250000 | | 20K0F3E |
| 1 | 1 | 455.15000000 | | 20K0F3E |
| 2 | 1 | 455.15000000 | | 20K0F3E |
| 1 | 2 | 455.28750000 | | 20K0F3E |
| 2 | 1 | 455.28750000 | | 20K0F3E |
| 1 | 1 | 455.51250000 | | 20K0F3E |
| 2 | 1 | 455.51250000 | | 20K0F3E |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | 233 S WACKER SEARS TOWER, CHICAGO, COOK, IL | 41.87891667, -87.63616667 | 181.000 m | BTWR | 549.000 m structure / 549.000 m overall | N |
| 2 | T | | | | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | T | | 549.000 m | | | | 0.000 | |
| 1 | 2 | T | | | | | | | |
| 2 | 1 | T | | 549.000 m | V | 9.0000 | 270.0000 | 0.000 | |
Control points
| Number | Address | County | Phone |
|---|
| 1 | | | 3127051770 |
License history
| Date | File or call sign | Action |
|---|
| 2021-12-03 | WPMD350 | LIREN |
| 2021-09-06 | WPMD350 | LETRES |
| 2019-12-31 | WPMD350 | LITRAN |
| 2019-05-01 | WPMD350 | LIASS |
| 2018-04-24 | WPMD350 | LIASS |
| 2017-08-23 | WPMD350 | LIAUA |
| 2016-05-03 | WPMD350 | LIAUA |
| 2016-05-02 | WPMD350 | ESCAPR |
| 2015-07-02 | WPMD350 | LITRAN |
| 2015-06-19 | WPMD350 | ESUAPR |
| 2013-09-18 | WPMD350 | LIREN |
| 2013-09-09 | WPMD350 | LETRES |
| 2011-07-13 | WPMD350 | LITRAN |
| 2011-07-13 | WPMD350 | LTSAPR |
| 2011-05-30 | WPMD350 | LTSAPR |
| 2011-05-28 | WPMD350 | LIAUA |
| 2011-04-29 | WPMD350 | ESUAPR |
| 2011-04-29 | WPMD350 | LIASS |
| 2010-06-15 | WPMD350 | LIASS |
| 2010-06-04 | WPMD350 | ESUAPR |
| 2009-04-23 | WPMD350 | LITRAN |
| 2009-04-15 | WPMD350 | ESUAPR |
| 2005-11-19 | WPMD350 | LIREN |
| 2005-11-18 | WPMD350 | ESUAPR |
| 2005-09-12 | WPMD350 | LETRES |
| 2001-08-25 | WPMD350 | LIAUA |
| 2001-04-25 | WPMD350 | LIAUA |
| 2001-01-01 | WPMD350 | LIASS |
| 2000-09-15 | WPMD350 | LICCNV |
| 1998-06-08 | WPMD350 | LIISS |
| 1998-06-08 | WPMD350 | AUTHPR |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 1145725 | 2026-08-02 00:37:43 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | WPMD350 | ULS 1145725 | 2026-08-02 00:37:43 |
| Status | A | ULS 1145725 | 2026-08-02 00:37:43 |
| Service | RP | ULS 1145725 | 2026-08-02 00:37:43 |
| Grant Date | 2021-12-03 | ULS 1145725 | 2026-08-02 00:37:43 |
| Expiration Date | 2029-12-01 | ULS 1145725 | 2026-08-02 00:37:43 |