Universal Licensing System
WLL831
MCI WORLDCOM NETWORK SERVICES INC
License details
| ULS identifier | 994184 |
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| Call sign | WLL831 |
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| Radio service | CF |
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| Status | C |
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| Grant date | 1991-06-26 |
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| Expiration | 2001-02-01 |
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| Cancellation | 1998-04-30 |
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| Frequency range | 19280 - 19320 MHz (2 frequencies) |
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| Locations | 3 |
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| Representative location | DETROIT, WAYNE, MI |
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| Coordinates | 42.4436389, -83.0396389 |
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| Source archive | l_micro.zip |
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| Dataset refreshed | 2026-08-02 02:47:57 |
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Licensee
| Name | MCI WORLDCOM NETWORK SERVICES INC |
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| Applicant type | C |
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| Location | RICHARDSON, TX |
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| Address | 2270 LAKESIDE DR, RICHARDSON, TX, 75082 |
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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 | 2 | FXO | 19280.00000000 | | | | | |
| 1 | 1 | FXO | 19320.00000000 | | | | | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 2 | 19280.00000000 | | 40M0F7W |
| 1 | 1 | 19320.00000000 | | 40M0F7W |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
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| 1 | T | 3675 EAST OUTER DRIVE, DETROIT, WAYNE, MI | 42.44363889, -83.03963889 | 189.300 m | | 27.700 m overall | |
| 2 | R | | 42.40225000, -83.07825000 | 192.600 m | | | |
| 3 | R | | 42.48669444, -83.03380556 | 189.900 m | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
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| 1 | 1 | T | | | V | 44.7000 | 5.7000 | | |
| 1 | 2 | R | | | | 48.2000 | | | |
| 1 | 3 | R | | | | 44.7000 | | | |
| 2 | 1 | T | | | V | 48.2000 | 214.7000 | | |
License history
| Date | File or call sign | Action |
|---|
| 1999-08-14 | WLL831 | LICCNV |
| 1998-04-30 | WLL831 | LICAN |
| 1997-05-23 | WLL831 | COR |
| 1997-05-21 | WLL831 | COR |
| 1991-06-26 | WLL831 | APGRT |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 994184 | 2026-08-02 02:47:57 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
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| Call Sign | WLL831 | ULS 994184 | 2026-08-02 02:47:57 |
| Status | C | ULS 994184 | 2026-08-02 02:47:57 |
| Service | CF | ULS 994184 | 2026-08-02 02:47:57 |
| Grant Date | 1991-06-26 | ULS 994184 | 2026-08-02 02:47:57 |
| Expiration Date | 2001-02-01 | ULS 994184 | 2026-08-02 02:47:57 |
| Cancellation Date | 1998-04-30 | ULS 994184 | 2026-08-02 02:47:57 |