Universal Licensing System
WNTH603
FIRSTMARK COMMUNICATIONS INC
License details
| ULS identifier | 1021781 |
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| Call sign | WNTH603 |
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| Radio service | MG |
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| Status | E |
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| Grant date | 1991-01-17 |
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| Expiration | 1996-01-17 |
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| Frequency range | 18835 - 19175 MHz (2 frequencies) |
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| Locations | 1 |
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| Representative location | TUCSON, PIMA, AZ |
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| Coordinates | 32.2395000, -110.9709167 |
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| Source archive | l_micro.zip |
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| Dataset refreshed | 2026-08-02 02:47:51 |
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Licensee
| Name | FIRSTMARK COMMUNICATIONS INC |
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| Applicant type | C |
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| Location | NEW YORK, NY |
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| Address | 919 THIRD AVE 21ST FLR, NEW YORK, NY, 10022 |
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Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
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| 1 | 1 | FXO | 18835.00000000 | | | | | |
| 1 | 3 | FXO | 19175.00000000 | | | | | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 1 | 18835.00000000 | | 10M0F7W |
| 1 | 3 | 19175.00000000 | | 10M0F7W |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | WITHIN 17.5 MI OF REFERENCE COORDINATES, TUCSON, PIMA, AZ | 32.23950000, -110.97091667 | | | 6.100 m overall | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | T | | | V | 13.5000 | 360.0000 | | |
| 2 | 1 | R | | | | 13.5000 | | | |
| 3 | 1 | T | | | V | 13.5000 | 360.0000 | | |
| 4 | 1 | R | | | | 13.5000 | | | |
License history
| Date | File or call sign | Action |
|---|
| 1999-08-14 | WNTH603 | LICCNV |
| 1999-06-07 | WNTH603 | COR |
| 1998-07-21 | WNTH603 | COR |
| 1997-04-10 | WNTH603 | COR |
| 1991-01-17 | WNTH603 | LIISS |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 1021781 | 2026-08-02 02:47:51 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | WNTH603 | ULS 1021781 | 2026-08-02 02:47:51 |
| Status | E | ULS 1021781 | 2026-08-02 02:47:51 |
| Service | MG | ULS 1021781 | 2026-08-02 02:47:51 |
| Grant Date | 1991-01-17 | ULS 1021781 | 2026-08-02 02:47:51 |
| Expiration Date | 1996-01-17 | ULS 1021781 | 2026-08-02 02:47:51 |