Universal Licensing System
KNNT257
BLACK ROCK MANAGEMENT INC DBA CARROLLTOWN CENTER DEVELOPMENT CO LLC
License details
| ULS identifier | 1767259 |
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| Call sign | KNNT257 |
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| Radio service | IG |
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| Status | E |
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| Grant date | 1996-04-25 |
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| Expiration | 2001-04-25 |
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| Cancellation | 2001-07-01 |
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| Frequency range | 463.9625 - 468.9625 MHz (3 frequencies) |
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| Locations | 1 |
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| Representative location | CARROLL, MD |
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| Coordinates | 39.3973333, -76.9363611 |
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| Source archive | l_LMpriv.zip |
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| Dataset refreshed | 2026-08-02 01:26:26 |
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Licensee
| Name | BLACK ROCK MANAGEMENT INC DBA CARROLLTOWN CENTER DEVELOPMENT CO LLC |
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| Applicant type | C |
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| Location | ELDERSBURG, MD |
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| Address | ELDERSBURG, MD, 21784 |
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| Phone | 4107817070 |
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Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
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| 1 | 1 | MO | 463.96250000 | | | 2.000000 | | |
| 1 | 1 | MO | 463.97500000 | | | 4.000000 | | |
| 1 | 1 | MO | 468.96250000 | | | 2.000000 | | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 1 | 463.96250000 | | 20K0F3E |
| 1 | 1 | 463.97500000 | | 20K0F3E |
| 1 | 1 | 468.96250000 | | 20K0F3E |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | CARROLL, MD | 39.39733333, -76.93636111 | | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | T | | | | | | | |
Control points
| Number | Address | County | Phone |
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| 1 | 6400 RIDGE RD STE 9, ELDERSBURG, MD | | 4107817070 |
License history
| Date | File or call sign | Action |
|---|
| 2001-08-22 | KNNT257 | LETAUS |
| 2001-07-01 | KNNT257 | LIEXP |
| 2001-01-29 | KNNT257 | LETRES |
| 2000-11-23 | KNNT257 | COR |
| 2000-11-23 | KNNT257 | LICCNV |
| 1998-02-19 | KNNT257 | AUTHPR |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 1767259 | 2026-08-02 01:26:26 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | KNNT257 | ULS 1767259 | 2026-08-02 01:26:26 |
| Status | E | ULS 1767259 | 2026-08-02 01:26:26 |
| Service | IG | ULS 1767259 | 2026-08-02 01:26:26 |
| Grant Date | 1996-04-25 | ULS 1767259 | 2026-08-02 01:26:26 |
| Expiration Date | 2001-04-25 | ULS 1767259 | 2026-08-02 01:26:26 |
| Cancellation Date | 2001-07-01 | ULS 1767259 | 2026-08-02 01:26:26 |