Universal Licensing System
WCU421
MCI WORLDCOM NETWORK SERVICES INC
License details
| ULS identifier | 972963 |
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| Call sign | WCU421 |
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| Radio service | CF |
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| Status | C |
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| Grant date | 1991-04-01 |
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| Expiration | 2001-02-01 |
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| Cancellation | 1996-08-20 |
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| Frequency range | 6404.79 MHz |
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| Locations | 3 |
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| Representative location | CORONA DEL MAR, ORANGE, CA |
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| Coordinates | 33.6052778, -117.8114167 |
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| Source archive | l_micro.zip |
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| Dataset refreshed | 2026-08-02 02:47:40 |
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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 | 6197.24000000 | | | | | |
| 1 | 2 | FXO | 6197.24000000 | | | | | |
| 1 | 3 | FXO | 6226.89000000 | | | | | |
| 1 | 4 | FXO | 6226.89000000 | | | | | |
| 1 | 1 | FXO | 6256.54000000 | | | | | |
| 1 | 2 | FXO | 6256.54000000 | | | | | |
| 1 | 3 | FXO | 6286.19000000 | | | | | |
| 1 | 4 | FXO | 6286.19000000 | | | | | |
| 1 | 1 | FXO | 6315.84000000 | | | | | |
| 1 | 2 | FXO | 6315.84000000 | | | | | |
| 1 | 3 | FXO | 6345.49000000 | | | | | |
| 1 | 4 | FXO | 6345.49000000 | | | | | |
| 1 | 1 | FXO | 6375.14000000 | | | | | |
| 1 | 2 | FXO | 6375.14000000 | | | | | |
| 1 | 3 | FXO | 6404.79000000 | | | | | |
| 1 | 4 | FXO | 6404.79000000 | | | | | |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
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| 1 | T | 4.6 MILES EAST OF, CORONA DEL MAR, ORANGE, CA | 33.60527778, -117.81141667 | 352.700 m | | 29.900 m overall | |
| 2 | R | | 33.60194444, -117.34391667 | 1077.500 m | | | |
| 3 | R | | 33.86888889, -118.24838889 | 47.200 m | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | T | | | H | 43.5000 | 90.4000 | | |
| 1 | 2 | R | | | | 43.2000 | | | |
| 1 | 3 | R | | | | 43.5000 | | | |
| 2 | 1 | T | | | H | 43.5000 | 306.0000 | | |
| 2 | 2 | R | | | | 43.2000 | | | |
| 2 | 3 | R | | | | 43.5000 | | | |
| 3 | 1 | T | | | V | 43.5000 | 90.4000 | | |
| 4 | 1 | T | | | V | 43.5000 | 306.0000 | | |
License history
| Date | File or call sign | Action |
|---|
| 1999-08-13 | WCU421 | LICCNV |
| 1996-08-20 | WCU421 | LICAN |
| 1991-04-01 | WCU421 | LIREN |
| 1990-05-17 | WCU421 | LIMOD |
| 1988-08-25 | WCU421 | APGRT |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 972963 | 2026-08-02 02:47:40 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | WCU421 | ULS 972963 | 2026-08-02 02:47:40 |
| Status | C | ULS 972963 | 2026-08-02 02:47:40 |
| Service | CF | ULS 972963 | 2026-08-02 02:47:40 |
| Grant Date | 1991-04-01 | ULS 972963 | 2026-08-02 02:47:40 |
| Expiration Date | 2001-02-01 | ULS 972963 | 2026-08-02 02:47:40 |
| Cancellation Date | 1996-08-20 | ULS 972963 | 2026-08-02 02:47:40 |