Universal Licensing System
WLK504
MCI Communications Services, Inc.
License details
| ULS identifier | 993203 |
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| Call sign | WLK504 |
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| Radio service | CF |
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| Status | C |
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| Grant date | 2001-01-30 |
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| Expiration | 2011-02-01 |
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| Cancellation | 2008-10-01 |
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| Frequency range | 3710 - 11645 MHz (12 frequencies) |
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| Locations | 3 |
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| Representative location | WARSAW, WYOMING, NY |
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| Coordinates | 42.7242222, -78.2475000 |
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| Source archive | l_micro.zip |
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| Dataset refreshed | 2026-08-17 04:23:13 |
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Licensee
| Name | MCI Communications Services, Inc. |
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| Applicant type | C |
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| Location | Richardson, TX |
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| Address | 2400 N. Glenville Drive, Dept/Loc 71216/107, Richardson, TX, 75082 |
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| Phone | 9727296406 |
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| Email | [email protected] |
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Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
|---|
| 1 | 2 | FXO | 3710.00000000 | | | | | |
| 1 | 2 | FXO | 3790.00000000 | | | | | |
| 1 | 2 | FXO | 3870.00000000 | | | | | |
| 1 | 2 | FXO | 3950.00000000 | | | | | |
| 1 | 2 | FXO | 4030.00000000 | | | | | |
| 1 | 2 | FXO | 4110.00000000 | | | | | |
| 1 | 1 | FXO | 11245.00000000 | | | | | |
| 1 | 1 | FXO | 11325.00000000 | | | | | |
| 1 | 1 | FXO | 11405.00000000 | | | | | |
| 1 | 1 | FXO | 11485.00000000 | | | | | |
| 1 | 1 | FXO | 11565.00000000 | | | | | |
| 1 | 1 | FXO | 11645.00000000 | | | | | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 2 | 3710.00000000 | | 20M0F7W |
| 1 | 2 | 3790.00000000 | | 20M0F7W |
| 1 | 2 | 3870.00000000 | | 20M0F7W |
| 1 | 2 | 3950.00000000 | | 20M0F7W |
| 1 | 2 | 4030.00000000 | | 20M0F7W |
| 1 | 2 | 4110.00000000 | | 20M0F7W |
| 1 | 1 | 11245.00000000 | | 40M0F7W |
| 1 | 1 | 11325.00000000 | | 40M0F7W |
| 1 | 1 | 11405.00000000 | | 40M0F7W |
| 1 | 1 | 11485.00000000 | | 40M0F7W |
| 1 | 1 | 11565.00000000 | | 40M0F7W |
| 1 | 1 | 11645.00000000 | | 40M0F7W |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | 4.5 MI SW OF, WARSAW, WYOMING, NY | 42.72422222, -78.24750000 | 613.300 m | | 51.200 m overall | |
| 2 | R | | 42.57644444, -78.57000000 | 584.600 m | | | |
| 3 | R | | 42.75283333, -78.23194444 | 576.100 m | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | T | | | H | 46.5000 | 21.8000 | | |
| 1 | 2 | R | | | | 41.0000 | | | |
| 1 | 3 | R | | | | 46.5000 | | | |
| 2 | 1 | T | | | H | 41.0000 | 238.3000 | | |
License history
| Date | File or call sign | Action |
|---|
| 2008-10-02 | WLK504 | LICAN |
| 2006-02-02 | WLK504 | LIASS |
| 2006-01-06 | WLK504 | LITRAN |
| 2005-06-08 | WLK504 | LIAUA |
| 2005-06-07 | WLK504 | ESUAPR |
| 2005-05-02 | WLK504 | ESCAPR |
| 2005-03-11 | WLK504 | ESUAPR |
| 2004-04-20 | WLK504 | LIASS |
| 2003-02-12 | WLK504 | LIAUA |
| 2003-01-15 | WLK504 | LIAUA |
| 2003-01-14 | WLK504 | LIAUA |
| 2002-07-21 | WLK504 | LIASS |
| 2001-03-07 | WLK504 | LIAUA |
| 2001-01-30 | WLK504 | LIREN |
| 2000-11-13 | WLK504 | LETRES |
| 1999-08-14 | WLK504 | LICCNV |
| 1999-02-11 | WLK504 | LITRAN |
| 1991-04-01 | WLK504 | LIREN |
| 1988-06-20 | WLK504 | APGRT |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 993203 | 2026-08-17 04:23:13 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | WLK504 | ULS 993203 | 2026-08-17 04:23:13 |
| Status | C | ULS 993203 | 2026-08-17 04:23:13 |
| Service | CF | ULS 993203 | 2026-08-17 04:23:13 |
| Grant Date | 2001-01-30 | ULS 993203 | 2026-08-17 04:23:13 |
| Expiration Date | 2011-02-01 | ULS 993203 | 2026-08-17 04:23:13 |
| Cancellation Date | 2008-10-01 | ULS 993203 | 2026-08-17 04:23:13 |