Universal Licensing System
WLB587
MCI WORLDCOM NETWORK SERVICES INC
License details
| ULS identifier | 987900 |
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| Call sign | WLB587 |
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| Radio service | CF |
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| Status | E |
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| Grant date | 1993-06-08 |
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| Expiration | 2001-02-01 |
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| Cancellation | 2001-05-06 |
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| Frequency range | 6004.5 - 6152.75 MHz (3 frequencies) |
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| Locations | 3 |
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| Representative location | CHUNCHULA, MOBILE, AL |
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| Coordinates | 30.8743333, -88.1508333 |
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| Source archive | l_micro.zip |
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| Dataset refreshed | 2026-08-02 02:45:12 |
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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 |
|---|
| 1 | 1 | FXO | 3730.00000000 | | | | | |
| 1 | 1 | FXO | 3810.00000000 | | | | | |
| 1 | 1 | FXO | 3890.00000000 | | | | | |
| 1 | 1 | FXO | 3970.00000000 | | | | | |
| 1 | 1 | FXO | 4050.00000000 | | | | | |
| 1 | 1 | FXO | 4130.00000000 | | | | | |
| 1 | 2 | FXO | 5974.85000000 | | | | | |
| 1 | 3 | FXO | 6004.50000000 | | | | | |
| 1 | 2 | FXO | 6034.15000000 | | | | | |
| 1 | 3 | FXO | 6063.80000000 | | | | | |
| 1 | 2 | FXO | 6093.45000000 | | | | | |
| 1 | 2 | FXO | 6152.75000000 | | | | | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 1 | 3730.00000000 | | 20M0F7W |
| 1 | 1 | 3810.00000000 | | 20M0F7W |
| 1 | 1 | 3890.00000000 | | 20M0F7W |
| 1 | 1 | 3970.00000000 | | 20M0F7W |
| 1 | 2 | 5974.85000000 | | 30M0D7W |
| 1 | 2 | 6034.15000000 | | 30M0D7W |
| 1 | 2 | 6093.45000000 | | 30M0D7W |
| 1 | 2 | 6152.75000000 | | 30M0D7W |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
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| 1 | T | 4.5 MILES SE OF, CHUNCHULA, MOBILE, AL | 30.87433333, -88.15083333 | 65.800 m | | 54.300 m overall | |
| 2 | R | | 31.00544444, -87.77330556 | 89.600 m | | | |
| 3 | R | | 30.70794444, -88.04663889 | 4.000 m | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | T | | | H | 39.8000 | 68.0000 | | |
| 1 | 2 | R | | | | 39.8000 | | | |
| 1 | 3 | R | | | | 43.5000 | | | |
| 2 | 1 | T | | | H | 43.5000 | 151.6000 | | |
| 2 | 3 | R | | | | 43.5000 | | | |
| 3 | 1 | T | | | V | 43.5000 | 151.6000 | | |
License history
| Date | File or call sign | Action |
|---|
| 2001-05-06 | WLB587 | LIEXP |
| 2000-11-13 | WLB587 | LETRES |
| 1999-08-13 | WLB587 | LICCNV |
| 1999-07-02 | WLB587 | COR |
| 1999-03-29 | WLB587 | COR |
| 1999-02-11 | WLB587 | LITRAN |
| 1992-07-30 | WLB587 | LIMOD |
| 1991-04-01 | WLB587 | LIREN |
| 1986-03-10 | WLB587 | LIMOD |
| 1985-05-16 | WLB587 | APGRT |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 987900 | 2026-08-02 02:45:12 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
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| Call Sign | WLB587 | ULS 987900 | 2026-08-02 02:45:12 |
| Status | E | ULS 987900 | 2026-08-02 02:45:12 |
| Service | CF | ULS 987900 | 2026-08-02 02:45:12 |
| Grant Date | 1993-06-08 | ULS 987900 | 2026-08-02 02:45:12 |
| Expiration Date | 2001-02-01 | ULS 987900 | 2026-08-02 02:45:12 |
| Cancellation Date | 2001-05-06 | ULS 987900 | 2026-08-02 02:45:12 |