Universal Licensing System
KOY56
AT&T CORP
License details
| ULS identifier | 963042 |
|---|
| Call sign | KOY56 |
|---|
| Radio service | CF |
|---|
| Status | C |
|---|
| Grant date | 1991-01-25 |
|---|
| Expiration | 2000-02-01 |
|---|
| Cancellation | 1998-01-28 |
|---|
| Frequency range | 3770 - 4170 MHz (6 frequencies) |
|---|
| Locations | 3 |
|---|
| Representative location | MILES CITY, CUSTER, MT |
|---|
| Coordinates | 46.4916667, -105.6705278 |
|---|
| Source archive | l_micro.zip |
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| Dataset refreshed | 2026-08-02 02:48:10 |
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Licensee
| Name | AT&T CORP |
|---|
| Applicant type | C |
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| Location | ATLANTA, GA |
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| Address | 1200 PEACHTREE ST 15W24, ATLANTA, GA, 30309 |
|---|
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 | 3750.00000000 | | | | | |
| 1 | 3 | FXO | 3770.00000000 | | | | | |
| 1 | 4 | FXO | 3770.00000000 | | | | | |
| 1 | 1 | FXO | 3830.00000000 | | | | | |
| 1 | 2 | FXO | 3830.00000000 | | | | | |
| 1 | 3 | FXO | 3850.00000000 | | | | | |
| 1 | 4 | FXO | 3850.00000000 | | | | | |
| 1 | 1 | FXO | 3910.00000000 | | | | | |
| 1 | 2 | FXO | 3910.00000000 | | | | | |
| 1 | 3 | FXO | 3930.00000000 | | | | | |
| 1 | 4 | FXO | 3930.00000000 | | | | | |
| 1 | 1 | FXO | 3990.00000000 | | | | | |
| 1 | 2 | FXO | 3990.00000000 | | | | | |
| 1 | 3 | FXO | 4010.00000000 | | | | | |
| 1 | 4 | FXO | 4010.00000000 | | | | | |
| 1 | 3 | FXO | 4090.00000000 | | | | | |
| 1 | 4 | FXO | 4090.00000000 | | | | | |
| 1 | 3 | FXO | 4170.00000000 | | | | | |
| 1 | 4 | FXO | 4170.00000000 | | | | | |
| 1 | 1 | FXO | 4198.00000000 | | | | | |
| 1 | 2 | FXO | 4198.00000000 | | | | | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 1 | 3750.00000000 | | 20M0F8W |
| 1 | 2 | 3750.00000000 | | 20M0F8W |
| 1 | 3 | 3770.00000000 | | 20M0F8W |
| 1 | 4 | 3770.00000000 | | 20M0F8W |
| 1 | 1 | 3830.00000000 | | 20M0F8W |
| 1 | 2 | 3830.00000000 | | 20M0F8W |
| 1 | 3 | 3850.00000000 | | 20M0F8W |
| 1 | 4 | 3850.00000000 | | 20M0F8W |
| 1 | 1 | 3910.00000000 | | 20M0F8W |
| 1 | 2 | 3910.00000000 | | 20M0F8W |
| 1 | 3 | 3930.00000000 | | 20M0F8W |
| 1 | 4 | 3930.00000000 | | 20M0F8W |
| 1 | 1 | 3990.00000000 | | 20M0F8W |
| 1 | 2 | 3990.00000000 | | 20M0F8W |
| 1 | 3 | 4010.00000000 | | 20M0F8W |
| 1 | 4 | 4010.00000000 | | 20M0F8W |
| 1 | 3 | 4090.00000000 | | 20M0F8W |
| 1 | 4 | 4090.00000000 | | 20M0F8W |
| 1 | 3 | 4170.00000000 | | 20M0F8W |
| 1 | 4 | 4170.00000000 | | 20M0F8W |
| 1 | 1 | 4198.00000000 | | 850KF8W |
| 1 | 2 | 4198.00000000 | | 850KF8W |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | 10.0 MILES NE OF, MILES CITY, CUSTER, MT | 46.49166667, -105.67052778 | 844.900 m | | 51.200 m overall | |
| 2 | R | | 46.92444444, -105.16580556 | 883.300 m | | | |
| 3 | R | | 46.28111111, -106.15416667 | 838.500 m | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | T | | | H | 39.5000 | 38.6000 | | |
| 1 | 2 | R | | | | 39.5000 | | | |
| 1 | 3 | R | | | | 39.5000 | | | |
| 2 | 1 | T | | | H | 39.5000 | 238.0000 | | |
| 2 | 2 | R | | | | 39.5000 | | | |
| 2 | 3 | R | | | | 39.5000 | | | |
| 3 | 1 | T | | | V | 39.5000 | 38.6000 | | |
| 4 | 1 | T | | | V | 39.5000 | 238.0000 | | |
License history
| Date | File or call sign | Action |
|---|
| 1999-08-13 | KOY56 | LICCNV |
| 1998-01-28 | KOY56 | LICAN |
| 1991-01-25 | KOY56 | LIMOD |
| 1990-01-16 | KOY56 | LIREN |
| 1989-11-29 | KOY56 | LIMOD |
| 1985-09-03 | KOY56 | APGRT |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 963042 | 2026-08-02 02:48:10 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | KOY56 | ULS 963042 | 2026-08-02 02:48:10 |
| Status | C | ULS 963042 | 2026-08-02 02:48:10 |
| Service | CF | ULS 963042 | 2026-08-02 02:48:10 |
| Grant Date | 1991-01-25 | ULS 963042 | 2026-08-02 02:48:10 |
| Expiration Date | 2000-02-01 | ULS 963042 | 2026-08-02 02:48:10 |
| Cancellation Date | 1998-01-28 | ULS 963042 | 2026-08-02 02:48:10 |