Universal Licensing System
WLB635
MCI WORLDCOM NETWORK SERVICES INC
License details
| ULS identifier | 987943 |
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| Call sign | WLB635 |
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| Radio service | CF |
|---|
| Status | C |
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| Grant date | 1991-10-10 |
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| Expiration | 2001-02-01 |
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| Cancellation | 1999-11-08 |
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| Frequency range | 3770 - 4170 MHz (10 frequencies) |
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| Locations | 3 |
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| Representative location | RIALTO, SAN BERNARDINO, CA |
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| Coordinates | 34.0980556, -117.3786389 |
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| Source archive | l_micro.zip |
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| Dataset refreshed | 2026-09-14 16:58:55 |
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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 | 3750.00000000 | | | | | |
| 1 | 2 | FXO | 3770.00000000 | | | | | |
| 1 | 3 | FXO | 3770.00000000 | | | | | |
| 1 | 1 | FXO | 3830.00000000 | | | | | |
| 1 | 2 | FXO | 3850.00000000 | | | | | |
| 1 | 3 | FXO | 3850.00000000 | | | | | |
| 1 | 1 | FXO | 3910.00000000 | | | | | |
| 1 | 2 | FXO | 3930.00000000 | | | | | |
| 1 | 3 | FXO | 3930.00000000 | | | | | |
| 1 | 1 | FXO | 3990.00000000 | | | | | |
| 1 | 2 | FXO | 4010.00000000 | | | | | |
| 1 | 3 | FXO | 4010.00000000 | | | | | |
| 1 | 1 | FXO | 4070.00000000 | | | | | |
| 1 | 2 | FXO | 4090.00000000 | | | | | |
| 1 | 3 | FXO | 4090.00000000 | | | | | |
| 1 | 1 | FXO | 4150.00000000 | | | | | |
| 1 | 2 | FXO | 4170.00000000 | | | | | |
| 1 | 3 | FXO | 4170.00000000 | | | | | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 1 | 3750.00000000 | | 20M0F7W |
| 1 | 2 | 3770.00000000 | | 20M0F7W |
| 1 | 3 | 3770.00000000 | | 20M0F7W |
| 1 | 1 | 3830.00000000 | | 20M0F7W |
| 1 | 2 | 3850.00000000 | | 20M0F7W |
| 1 | 3 | 3850.00000000 | | 20M0F7W |
| 1 | 1 | 3910.00000000 | | 20M0F7W |
| 1 | 2 | 3930.00000000 | | 20M0F7W |
| 1 | 3 | 3930.00000000 | | 20M0F7W |
| 1 | 1 | 3990.00000000 | | 20M0F7W |
| 1 | 2 | 4010.00000000 | | 20M0F7W |
| 1 | 3 | 4010.00000000 | | 20M0F7W |
| 1 | 1 | 4070.00000000 | | 20M0F7W |
| 1 | 2 | 4090.00000000 | | 20M0F7W |
| 1 | 3 | 4090.00000000 | | 20M0F7W |
| 1 | 1 | 4150.00000000 | | 20M0F7W |
| 1 | 2 | 4170.00000000 | | 20M0F7W |
| 1 | 3 | 4170.00000000 | | 20M0F7W |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | 157 SOUTH LILAC AVE, RIALTO, SAN BERNARDINO, CA | 34.09805556, -117.37863889 | 370.600 m | | 51.200 m overall | |
| 2 | R | | 34.23500000, -117.14058333 | 1953.500 m | | | |
| 3 | R | | 33.94500000, -117.82172222 | 432.200 m | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | T | | | H | 39.2000 | 55.3000 | | |
| 1 | 2 | R | | | | 39.2000 | | | |
| 1 | 3 | R | | | | 41.3000 | | | |
| 2 | 1 | T | | | H | 41.3000 | 247.6000 | | |
| 2 | 2 | R | | | | 39.2000 | | | |
| 3 | 1 | T | | | V | 39.2000 | 55.3000 | | |
License history
| Date | File or call sign | Action |
|---|
| 1999-12-08 | WLB635 | LICAN |
| 1999-08-13 | WLB635 | LICCNV |
| 1999-02-11 | WLB635 | LITRAN |
| 1997-06-13 | WLB635 | COR |
| 1991-10-10 | WLB635 | LIMOD |
| 1991-04-01 | WLB635 | LIREN |
| 1989-01-24 | WLB635 | LIMOD |
| 1988-08-11 | WLB635 | LIMOD |
| 1988-08-04 | WLB635 | LIMOD |
| 1986-10-23 | WLB635 | LIMOD |
| 1986-09-18 | WLB635 | LIMOD |
| 1985-09-26 | WLB635 | APGRT |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 987943 | 2026-08-31 20:51:05 | Source Primary |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Applicant Name | MCI WORLDCOM NETWORK SERVICES INC | ULS 987943 | 2026-08-31 20:59:11 |
| Call Sign | WLB635 | ULS 987943 | 2026-08-31 20:59:11 |
| Cancellation Date | 1999-11-08 | ULS 987943 | 2026-08-31 20:59:11 |
| Description | 9713940 | ULS 987943 | 2026-08-31 20:59:11 |
| Expiration Date | 2001-02-01 | ULS 987943 | 2026-08-31 20:59:11 |
| Filed Date | 1991-10-10 | ULS 987943 | 2026-08-31 20:59:11 |
| Grant Date | 1991-10-10 | ULS 987943 | 2026-08-31 20:59:11 |
| Service | CF | ULS 987943 | 2026-08-31 20:59:11 |
| Source Archive | l_micro.zip | ULS 987943 | 2026-08-31 20:59:11 |
| Status | C | ULS 987943 | 2026-08-31 20:59:11 |