Universal Licensing System
WLB600
MCI WorldCom Network Services, Inc.
License details
| ULS identifier | 987911 |
|---|
| Call sign | WLB600 |
|---|
| Radio service | CF |
|---|
| Status | C |
|---|
| Grant date | 2001-01-23 |
|---|
| Expiration | 2011-02-01 |
|---|
| Cancellation | 2004-06-07 |
|---|
| Frequency range | 6004.5 - 6123.1 MHz (3 frequencies) |
|---|
| Locations | 3 |
|---|
| Representative location | KENT, KING, WA |
|---|
| Coordinates | 47.3970278, -122.1803889 |
|---|
| Source archive | l_micro.zip |
|---|
| Dataset refreshed | 2026-08-02 02:45:12 |
|---|
Licensee
| Name | MCI WorldCom Network Services, Inc. |
|---|
| Applicant type | C |
|---|
| Location | Richardson, TX |
|---|
| Address | 2400 North Glenville, Richardson, TX, 75082 |
|---|
| Phone | 9727296406 |
|---|
| Email | [email protected] |
|---|
Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
|---|
| 1 | 1 | FXO | 3730.00000000 | | | | | |
| 1 | 1 | FXO | 3810.00000000 | | | | | |
| 1 | 4 | FXO | 3870.00000000 | | | | | |
| 1 | 1 | FXO | 3890.00000000 | | | | | |
| 1 | 4 | FXO | 3950.00000000 | | | | | |
| 1 | 1 | FXO | 3970.00000000 | | | | | |
| 1 | 4 | FXO | 4030.00000000 | | | | | |
| 1 | 1 | FXO | 4050.00000000 | | | | | |
| 1 | 4 | FXO | 4110.00000000 | | | | | |
| 1 | 1 | FXO | 4130.00000000 | | | | | |
| 1 | 4 | FXO | 5945.20000000 | | | | | |
| 1 | 1 | FXO | 5974.85000000 | | | | | |
| 1 | 4 | FXO | 6004.50000000 | | | | | |
| 1 | 1 | FXO | 6034.15000000 | | | | | |
| 1 | 4 | FXO | 6063.80000000 | | | | | |
| 1 | 1 | FXO | 6093.45000000 | | | | | |
| 1 | 4 | FXO | 6123.10000000 | | | | | |
| 1 | 1 | FXO | 6152.75000000 | | | | | |
| 1 | 2 | FXO | 10735.00000000 | | | | | |
| 1 | 3 | FXO | 10775.00000000 | | | | | |
| 1 | 3 | FXO | 10855.00000000 | | | | | |
| 1 | 3 | FXO | 10935.00000000 | | | | | |
| 1 | 3 | FXO | 11015.00000000 | | | | | |
| 1 | 3 | FXO | 11095.00000000 | | | | | |
| 1 | 3 | FXO | 11175.00000000 | | | | | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 4 | 5945.20000000 | | 30M0D7W |
| 1 | 1 | 5974.85000000 | | 30M0D7W |
| 1 | 4 | 6004.50000000 | | 30M0D7W |
| 1 | 1 | 6034.15000000 | | 30M0D7W |
| 1 | 4 | 6063.80000000 | | 30M0D7W |
| 1 | 1 | 6093.45000000 | | 30M0D7W |
| 1 | 4 | 6123.10000000 | | 30M0D7W |
| 1 | 1 | 6152.75000000 | | 30M0D7W |
| 1 | 2 | 10735.00000000 | | 40M0A7W |
| 1 | 3 | 10775.00000000 | | 40M0A7W |
| 1 | 3 | 10855.00000000 | | 40M0A7W |
| 1 | 3 | 10935.00000000 | | 40M0A7W |
| 1 | 3 | 11015.00000000 | | 40M0A7W |
| 1 | 3 | 11095.00000000 | | 40M0A7W |
| 1 | 3 | 11175.00000000 | | 40M0A7W |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | 12001 SE 227TH PLACE, KENT, KING, WA | 47.39702778, -122.18038889 | 146.900 m | | 60.400 m overall | |
| 2 | R | | 47.02897222, -122.29955556 | 287.700 m | | | |
| 3 | R | | 47.30397222, -122.39733333 | 145.100 m | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | T | | | H | 39.2000 | 192.5000 | | |
| 1 | 2 | R | | | | 39.2000 | | | |
| 1 | 3 | R | | | | 48.4000 | | | |
| 2 | 1 | T | | | H | 48.4000 | 237.8000 | | |
| 2 | 2 | R | | | | 39.2000 | | | |
| 2 | 3 | R | | | | 48.4000 | | | |
| 3 | 1 | T | | | V | 48.4000 | 237.8000 | | |
| 4 | 1 | T | | | V | 39.2000 | 192.5000 | | |
License history
| Date | File or call sign | Action |
|---|
| 2004-06-08 | WLB600 | LICAN |
| 2004-04-20 | WLB600 | LIASS |
| 2003-02-12 | WLB600 | LIAUA |
| 2003-01-15 | WLB600 | LIAUA |
| 2003-01-14 | WLB600 | LIAUA |
| 2002-07-21 | WLB600 | LIASS |
| 2001-03-07 | WLB600 | LIAUA |
| 2001-01-23 | WLB600 | LIREN |
| 2000-11-13 | WLB600 | LETRES |
| 1999-08-13 | WLB600 | LICCNV |
| 1999-02-11 | WLB600 | LITRAN |
| 1996-07-02 | WLB600 | LIMOD |
| 1992-06-18 | WLB600 | LIMOD |
| 1991-04-01 | WLB600 | LIREN |
| 1990-06-15 | WLB600 | LIMOD |
| 1990-04-30 | WLB600 | LIMOD |
| 1990-04-03 | WLB600 | LIMOD |
| 1987-06-25 | WLB600 | LIMOD |
| 1986-01-30 | WLB600 | LIMOD |
| 1985-09-26 | WLB600 | APGRT |
| 1985-09-26 | WLB600 | LIMOD |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 987911 | 2026-08-02 02:45:12 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | WLB600 | ULS 987911 | 2026-08-02 02:45:12 |
| Status | C | ULS 987911 | 2026-08-02 02:45:12 |
| Service | CF | ULS 987911 | 2026-08-02 02:45:12 |
| Grant Date | 2001-01-23 | ULS 987911 | 2026-08-02 02:45:12 |
| Expiration Date | 2011-02-01 | ULS 987911 | 2026-08-02 02:45:12 |
| Cancellation Date | 2004-06-07 | ULS 987911 | 2026-08-02 02:45:12 |