Universal Licensing System
WLB739
MCI WORLDCOM NETWORK SERVICES INC
License details
| ULS identifier | 988020 |
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| Call sign | WLB739 |
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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 | 6197.24 - 6404.79 MHz (8 frequencies) |
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| Locations | 2 |
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| Representative location | SEATTLE, KING, WA |
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| Coordinates | 47.6045278, -122.3306667 |
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| Source archive | l_micro.zip |
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| Dataset refreshed | 2026-09-14 17:06:46 |
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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 | 6197.24000000 | | | | | |
| 1 | 2 | FXO | 6226.89000000 | | | | | |
| 1 | 1 | FXO | 6256.54000000 | | | | | |
| 1 | 2 | FXO | 6286.19000000 | | | | | |
| 1 | 1 | FXO | 6315.84000000 | | | | | |
| 1 | 2 | FXO | 6345.49000000 | | | | | |
| 1 | 1 | FXO | 6375.14000000 | | | | | |
| 1 | 2 | FXO | 6404.79000000 | | | | | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 1 | 6197.24000000 | | 30M0F7W |
| 1 | 2 | 6226.89000000 | | 30M0F7W |
| 1 | 1 | 6256.54000000 | | 30M0F7W |
| 1 | 2 | 6286.19000000 | | 30M0F7W |
| 1 | 1 | 6315.84000000 | | 30M0F7W |
| 1 | 2 | 6345.49000000 | | 30M0F7W |
| 1 | 1 | 6375.14000000 | | 30M0F7W |
| 1 | 2 | 6404.79000000 | | 30M0F7W |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | 701 5TH AVE, SEATTLE, KING, WA | 47.60452778, -122.33066667 | 50.600 m | | 271.000 m overall | |
| 2 | R | | 47.39702778, -122.18038889 | 146.900 m | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | T | | | H | 38.8000 | 153.8000 | | |
| 1 | 2 | R | | | | 38.8000 | | | |
| 2 | 1 | T | | | V | 38.8000 | 153.8000 | | |
| 2 | 2 | R | | | | 38.8000 | | | |
License history
| Date | File or call sign | Action |
|---|
| 1999-08-13 | WLB739 | LICCNV |
| 1996-08-20 | WLB739 | LICAN |
| 1991-04-01 | WLB739 | LIREN |
| 1988-08-04 | WLB739 | LIMOD |
| 1985-09-26 | WLB739 | APGRT |
| 1985-09-26 | WLB739 | LIMOD |
Sources and provenance
| Source | Source record | Retrieved | Match |
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| ULS | 988020 | 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 988020 | 2026-08-31 21:03:49 |
| Call Sign | WLB739 | ULS 988020 | 2026-08-31 21:03:49 |
| Cancellation Date | 1996-08-20 | ULS 988020 | 2026-08-31 21:03:49 |
| Description | 9121360 | ULS 988020 | 2026-08-31 21:03:49 |
| Expiration Date | 2001-02-01 | ULS 988020 | 2026-08-31 21:03:49 |
| Filed Date | 1991-04-01 | ULS 988020 | 2026-08-31 21:03:49 |
| Grant Date | 1991-04-01 | ULS 988020 | 2026-08-31 21:03:49 |
| Service | CF | ULS 988020 | 2026-08-31 21:03:49 |
| Source Archive | l_micro.zip | ULS 988020 | 2026-08-31 21:03:49 |
| Status | C | ULS 988020 | 2026-08-31 21:03:49 |