Universal Licensing System
WLL821
MCI WORLDCOM NETWORK SERVICES INC
License details
| ULS identifier | 994176 |
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| Call sign | WLL821 |
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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 | 2000-08-14 |
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| Frequency range | 18775 MHz |
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| Locations | 2 |
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| Representative location | SALT LAKE CITY, SALT LAKE, UT |
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| Coordinates | 40.7310556, -111.9704722 |
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| Source archive | l_micro.zip |
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| Dataset refreshed | 2026-09-14 16:59:04 |
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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 | 18775.00000000 | | | | | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
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| 1 | 1 | 18775.00000000 | | 10M0F7W |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
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| 1 | T | 3366 WEST 1820 SOUTH, SALT LAKE CITY, SALT LAKE, UT | 40.73105556, -111.97047222 | 1291.400 m | | 8.800 m overall | |
| 2 | R | | 40.76911111, -111.88741667 | 1325.000 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 | 39.4000 | 58.9000 | | |
| 1 | 2 | R | | | | 39.4000 | | | |
License history
| Date | File or call sign | Action |
|---|
| 2000-08-15 | WLL821 | LICAN |
| 1999-08-14 | WLL821 | LICCNV |
| 1999-02-11 | WLL821 | LITRAN |
| 1991-04-01 | WLL821 | LIREN |
| 1990-07-19 | WLL821 | APGRT |
Sources and provenance
| Source | Source record | Retrieved | Match |
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| ULS | 994176 | 2026-08-31 20:51:05 | Source Primary |
Selected field provenance
| Field | Displayed value | Source | Observed |
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| Applicant Name | MCI WORLDCOM NETWORK SERVICES INC | ULS 994176 | 2026-08-31 20:58:56 |
| Call Sign | WLL821 | ULS 994176 | 2026-08-31 20:58:56 |
| Cancellation Date | 2000-08-14 | ULS 994176 | 2026-08-31 20:58:56 |
| Description | 9713940 | ULS 994176 | 2026-08-31 20:58:56 |
| Expiration Date | 2001-02-01 | ULS 994176 | 2026-08-31 20:58:56 |
| Filed Date | 1991-04-01 | ULS 994176 | 2026-08-31 20:58:56 |
| Grant Date | 1991-04-01 | ULS 994176 | 2026-08-31 20:58:56 |
| Service | CF | ULS 994176 | 2026-08-31 20:58:56 |
| Source Archive | l_micro.zip | ULS 994176 | 2026-08-31 20:58:56 |
| Status | C | ULS 994176 | 2026-08-31 20:58:56 |