Universal Licensing System
KNNU550
SENTRY SECURITY DOGS
License details
| ULS identifier | 1635510 |
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| Call sign | KNNU550 |
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| Radio service | IG |
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| Status | E |
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| Grant date | 1996-05-06 |
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| Expiration | 2001-05-06 |
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| Cancellation | 2001-07-08 |
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| Frequency range | 463.35 - 468.35 MHz (2 frequencies) |
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| Locations | 3 |
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| Representative location | HAMMOND, LAKE, IN |
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| Coordinates | 41.5961389, -87.4783611 |
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| Source archive | l_LMpriv.zip |
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| Dataset refreshed | 2026-08-02 01:27:58 |
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Licensee
| Name | SENTRY SECURITY DOGS |
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| Applicant type | C |
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| Location | GRIFFITH, IN |
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| Address | GRIFFITH, IN, 46319 |
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| Phone | 2199723070 |
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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 | FB4 | 463.35000000 | | | 75.000000 | 30.000000 | |
| 3 | 1 | MO | 463.35000000 | | | 4.000000 | | |
| 2 | 1 | FX1 | 468.35000000 | | | 25.000000 | | |
| 3 | 1 | MO | 468.35000000 | | | 4.000000 | | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 1 | 463.35000000 | | 20K0F3E |
| 3 | 1 | 463.35000000 | | 20K0F3E |
| 2 | 1 | 468.35000000 | | 20K0F3E |
| 3 | 1 | 468.35000000 | | 20K0F3E |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | 6405 OLCOTT, HAMMOND, LAKE, IN | 41.59613889, -87.47836111 | 183.000 m | TOWER | 117.000 m structure / 117.000 m overall | N |
| 2 | T | IN | | | | | |
| 3 | T | | | | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | T | | 117.000 m | | | | 129.000 | |
| 1 | 2 | T | | | | | | | |
| 1 | 3 | T | | | | | | | |
Control points
| Number | Address | County | Phone |
|---|
| 1 | 500 4TH AVE, GRIFFITH, IN | | 2199723070 |
License history
| Date | File or call sign | Action |
|---|
| 2001-10-25 | KNNU550 | LETAUS |
| 2001-07-08 | KNNU550 | LIEXP |
| 2001-02-13 | KNNU550 | LETRES |
| 2000-11-23 | KNNU550 | LICCNV |
| 1996-05-06 | KNNU550 | LIISS |
| 1996-05-06 | KNNU550 | AUTHPR |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 1635510 | 2026-08-02 01:27:58 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | KNNU550 | ULS 1635510 | 2026-08-02 01:27:58 |
| Status | E | ULS 1635510 | 2026-08-02 01:27:58 |
| Service | IG | ULS 1635510 | 2026-08-02 01:27:58 |
| Grant Date | 1996-05-06 | ULS 1635510 | 2026-08-02 01:27:58 |
| Expiration Date | 2001-05-06 | ULS 1635510 | 2026-08-02 01:27:58 |
| Cancellation Date | 2001-07-08 | ULS 1635510 | 2026-08-02 01:27:58 |