Universal Licensing System
WMI253
MCI WORLDCOM NETWORK SERVICES INC
License details
| ULS identifier | 1001563 |
|---|
| Call sign | WMI253 |
|---|
| Radio service | CF |
|---|
| Status | C |
|---|
| Grant date | 1992-01-21 |
|---|
| Expiration | 2001-02-01 |
|---|
| Cancellation | 1999-04-01 |
|---|
| Frequency range | 21225 MHz |
|---|
| Locations | 2 |
|---|
| Representative location | ALTADENA, LOS ANGELES, CA |
|---|
| Coordinates | 34.2269444, -118.0670000 |
|---|
| Source archive | l_micro.zip |
|---|
| Dataset refreshed | 2026-08-02 02:45:09 |
|---|
Licensee
| Name | MCI WORLDCOM NETWORK SERVICES INC |
|---|
| Applicant type | C |
|---|
| Location | RICHARDSON, TX |
|---|
| Address | 2270 LAKESIDE DR, RICHARDSON, TX, 75082 |
|---|
Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
|---|
| 1 | 1 | FXO | 21225.00000000 | | | | | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 1 | 21225.00000000 | | 25M0F8W |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | 3.5 MI NE OF, ALTADENA, LOS ANGELES, CA | 34.22694444, -118.06700000 | 1741.300 m | | 143.300 m overall | |
| 2 | R | | 34.22666667, -118.06672222 | 1741.300 m | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | T | | | V | | 140.3000 | | |
| 1 | 2 | R | | | | | | | |
License history
| Date | File or call sign | Action |
|---|
| 1999-08-14 | WMI253 | LICCNV |
| 1999-04-01 | WMI253 | LICAN |
| 1999-04-01 | WMI253 | LIISS |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 1001563 | 2026-08-02 02:45:09 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | WMI253 | ULS 1001563 | 2026-08-02 02:45:09 |
| Status | C | ULS 1001563 | 2026-08-02 02:45:09 |
| Service | CF | ULS 1001563 | 2026-08-02 02:45:09 |
| Grant Date | 1992-01-21 | ULS 1001563 | 2026-08-02 02:45:09 |
| Expiration Date | 2001-02-01 | ULS 1001563 | 2026-08-02 02:45:09 |
| Cancellation Date | 1999-04-01 | ULS 1001563 | 2026-08-02 02:45:09 |