Universal Licensing System
WHO639
MCI WORLDCOM NETWORK SERVICES INC
License details
| ULS identifier | 983572 |
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| Call sign | WHO639 |
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| Radio service | CF |
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| Status | C |
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| Grant date | 1991-08-08 |
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| Expiration | 2001-02-01 |
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| Cancellation | 1997-10-29 |
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| Frequency range | 5974.85 - 6315.84 MHz (8 frequencies) |
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| Locations | 3 |
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| Coordinates | 41.2551944, -112.2365833 |
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| Source archive | l_micro.zip |
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| Dataset refreshed | 2026-09-14 17:06:06 |
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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 | 5945.20000000 | | | | | |
| 1 | 2 | FXO | 5945.20000000 | | | | | |
| 1 | 3 | FXO | 5945.20000000 | | | | | |
| 1 | 4 | FXO | 5974.85000000 | | | | | |
| 1 | 5 | FXO | 5974.85000000 | | | | | |
| 1 | 6 | FXO | 5974.85000000 | | | | | |
| 1 | 1 | FXO | 6004.50000000 | | | | | |
| 1 | 2 | FXO | 6004.50000000 | | | | | |
| 1 | 3 | FXO | 6004.50000000 | | | | | |
| 1 | 4 | FXO | 6034.15000000 | | | | | |
| 1 | 5 | FXO | 6034.15000000 | | | | | |
| 1 | 6 | FXO | 6034.15000000 | | | | | |
| 1 | 1 | FXO | 6063.80000000 | | | | | |
| 1 | 3 | FXO | 6063.80000000 | | | | | |
| 1 | 4 | FXO | 6093.45000000 | | | | | |
| 1 | 5 | FXO | 6093.45000000 | | | | | |
| 1 | 6 | FXO | 6093.45000000 | | | | | |
| 1 | 1 | FXO | 6123.10000000 | | | | | |
| 1 | 3 | FXO | 6123.10000000 | | | | | |
| 1 | 4 | FXO | 6152.75000000 | | | | | |
| 1 | 5 | FXO | 6152.75000000 | | | | | |
| 1 | 6 | FXO | 6152.75000000 | | | | | |
| 1 | 4 | FXO | 6315.84000000 | | | | | |
| 1 | 2 | FXO | 10775.00000000 | | | | | |
| 1 | 2 | FXO | 10855.00000000 | | | | | |
| 1 | 2 | FXO | 10935.00000000 | | | | | |
| 1 | 2 | FXO | 11015.00000000 | | | | | |
| 1 | 2 | FXO | 11095.00000000 | | | | | |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | UT | 41.18186111, -112.11352778 | 1293.600 m | | 31.400 m overall | |
| 2 | R | | | 0.000 m | | | |
| 3 | R | | 41.25519444, -112.23658333 | 1409.700 m | | | |
| 4 | R | | 41.75602778, -112.54550000 | 2106.500 m | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | T | | | H | | 103.2000 | | |
| 1 | 2 | R | | | | | | | |
| 1 | 3 | R | | | | | | | |
| 1 | 4 | R | | | | | | | |
| 2 | 1 | T | | | V | | 308.3000 | | |
| 2 | 2 | R | | | | | | | |
| 2 | 3 | R | | | | | | | |
| 2 | 4 | R | | | | | | | |
| 3 | 1 | T | | | H | | 330.6000 | | |
| 4 | 1 | T | | | V | | 103.2000 | | |
| 5 | 1 | T | | | H | | 308.3000 | | |
| 6 | 1 | T | | | V | | 330.6000 | | |
License history
| Date | File or call sign | Action |
|---|
| 1999-08-13 | WHO639 | LICCNV |
| 1997-12-22 | WHO639 | COR |
| 1997-10-29 | WHO639 | LICAN |
| 1997-05-23 | WHO639 | COR |
| 1997-05-20 | WHO639 | COR |
| 1991-08-08 | WHO639 | LIMOD |
| 1991-03-28 | WHO639 | LIMOD |
| 1988-06-23 | WHO639 | LIMOD |
| 1987-03-26 | WHO639 | LIMOD |
| 1986-10-23 | WHO639 | LIMOD |
| 1986-10-10 | WHO639 | LIMOD |
| 1986-05-08 | WHO639 | LIMOD |
| 1986-02-13 | WHO639 | APGRT |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 983572 | 2026-08-31 20:51:05 | Source Primary |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Applicant Name | MCI WORLDCOM NETWORK SERVICES INC | ULS 983572 | 2026-08-31 21:04:24 |
| Call Sign | WHO639 | ULS 983572 | 2026-08-31 21:04:24 |
| Cancellation Date | 1997-10-29 | ULS 983572 | 2026-08-31 21:04:24 |
| Description | 9106778 | ULS 983572 | 2026-08-31 21:04:24 |
| Expiration Date | 2001-02-01 | ULS 983572 | 2026-08-31 21:04:24 |
| Filed Date | 1991-08-08 | ULS 983572 | 2026-08-31 21:04:24 |
| Grant Date | 1991-08-08 | ULS 983572 | 2026-08-31 21:04:24 |
| Service | CF | ULS 983572 | 2026-08-31 21:04:24 |
| Source Archive | l_micro.zip | ULS 983572 | 2026-08-31 21:04:24 |
| Status | C | ULS 983572 | 2026-08-31 21:04:24 |