Universal Licensing System
WLB583
MCI WORLDCOM NETWORK SERVICES INC
License details
| ULS identifier | 987896 |
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| Call sign | WLB583 |
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| Radio service | CF |
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| Status | E |
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| Grant date | 1991-05-03 |
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| Expiration | 2001-02-01 |
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| Cancellation | 2001-05-06 |
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| Frequency range | 3730 - 4130 MHz (6 frequencies) |
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| Locations | 3 |
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| Representative location | MIDWAY, MONROE, AL |
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| Coordinates | 31.7409722, -87.0346944 |
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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 |
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| 1 | 1 | FXO | 3730.00000000 | | | | | |
| 1 | 2 | FXO | 3730.00000000 | | | | | |
| 1 | 1 | FXO | 3810.00000000 | | | | | |
| 1 | 2 | FXO | 3810.00000000 | | | | | |
| 1 | 1 | FXO | 3890.00000000 | | | | | |
| 1 | 2 | FXO | 3890.00000000 | | | | | |
| 1 | 1 | FXO | 3970.00000000 | | | | | |
| 1 | 2 | FXO | 3970.00000000 | | | | | |
| 1 | 1 | FXO | 4050.00000000 | | | | | |
| 1 | 2 | FXO | 4050.00000000 | | | | | |
| 1 | 1 | FXO | 4130.00000000 | | | | | |
| 1 | 2 | FXO | 4130.00000000 | | | | | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 1 | 3730.00000000 | | 20M0F7W |
| 1 | 2 | 3730.00000000 | | 20M0F7W |
| 1 | 1 | 3810.00000000 | | 20M0F7W |
| 1 | 2 | 3810.00000000 | | 20M0F7W |
| 1 | 1 | 3890.00000000 | | 20M0F7W |
| 1 | 2 | 3890.00000000 | | 20M0F7W |
| 1 | 1 | 3970.00000000 | | 20M0F7W |
| 1 | 2 | 3970.00000000 | | 20M0F7W |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | 1.8 MILES NNE OF, MIDWAY, MONROE, AL | 31.74097222, -87.03469444 | 164.600 m | | 75.600 m overall | |
| 2 | R | | 32.17791667, -86.84525000 | 154.200 m | | | |
| 3 | R | | 31.65902778, -87.39969444 | 116.100 m | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | T | | | V | 41.3000 | 20.2000 | | |
| 1 | 2 | R | | | | 41.3000 | | | |
| 1 | 3 | R | | | | 39.2000 | | | |
| 2 | 1 | T | | | V | 39.2000 | 255.4000 | | |
License history
| Date | File or call sign | Action |
|---|
| 2001-05-06 | WLB583 | LIEXP |
| 2000-11-13 | WLB583 | LETRES |
| 1999-08-13 | WLB583 | LICCNV |
| 1999-07-02 | WLB583 | COR |
| 1999-02-11 | WLB583 | LITRAN |
| 1991-04-01 | WLB583 | LIREN |
| 1986-03-10 | WLB583 | LIMOD |
| 1985-05-16 | WLB583 | APGRT |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 987896 | 2026-08-02 02:45:12 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
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| Call Sign | WLB583 | ULS 987896 | 2026-08-02 02:45:12 |
| Status | E | ULS 987896 | 2026-08-02 02:45:12 |
| Service | CF | ULS 987896 | 2026-08-02 02:45:12 |
| Grant Date | 1991-05-03 | ULS 987896 | 2026-08-02 02:45:12 |
| Expiration Date | 2001-02-01 | ULS 987896 | 2026-08-02 02:45:12 |
| Cancellation Date | 2001-05-06 | ULS 987896 | 2026-08-02 02:45:12 |