Universal Licensing System
WSIS581
Helmsco, Inc.
License details
| ULS identifier | 5151259 |
|---|
| Call sign | WSIS581 |
|---|
| Radio service | MG |
|---|
| Status | A |
|---|
| Grant date | 2025-06-16 |
|---|
| Expiration | 2035-06-16 |
|---|
| Frequency range | 10915 - 11645 MHz (6 frequencies) |
|---|
| Locations | 1 |
|---|
| Coordinates | 31.3719444, -97.1752500 |
|---|
| Source archive | l_micro.zip |
|---|
| Dataset refreshed | 2026-08-02 02:47:12 |
|---|
Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
|---|
| 1 | 4 | FXO | 10915.00000000 | | | | | |
| 1 | 1 | FXO | 10995.00000000 | | | | | |
| 1 | 2 | FXO | 11155.00000000 | | | | | |
| 1 | 3 | FXO | 11155.00000000 | | | | | |
| 1 | 4 | FXO | 11405.00000000 | | | | | |
| 1 | 1 | FXO | 11485.00000000 | | | | | |
| 1 | 2 | FXO | 11645.00000000 | | | | | |
| 1 | 3 | FXO | 11645.00000000 | | | | | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 4 | 10915.00000000 | | 77M0D7D |
| 1 | 4 | 10915.00000000 | | 77M0D7D |
| 1 | 4 | 10915.00000000 | | 77M0D7D |
| 1 | 4 | 10915.00000000 | | 77M0D7D |
| 1 | 4 | 10915.00000000 | | 77M0D7D |
| 1 | 4 | 10915.00000000 | | 77M0D7D |
| 1 | 4 | 10915.00000000 | | 77M0D7D |
| 1 | 4 | 10915.00000000 | | 77M0D7D |
| 1 | 1 | 10995.00000000 | | 77M0D7D |
| 1 | 1 | 10995.00000000 | | 77M0D7D |
| 1 | 1 | 10995.00000000 | | 77M0D7D |
| 1 | 1 | 10995.00000000 | | 77M0D7D |
| 1 | 1 | 10995.00000000 | | 77M0D7D |
| 1 | 1 | 10995.00000000 | | 77M0D7D |
| 1 | 1 | 10995.00000000 | | 77M0D7D |
| 1 | 1 | 10995.00000000 | | 77M0D7D |
| 1 | 2 | 11155.00000000 | | 77M0D7D |
| 1 | 2 | 11155.00000000 | | 77M0D7D |
| 1 | 2 | 11155.00000000 | | 77M0D7D |
| 1 | 2 | 11155.00000000 | | 77M0D7D |
| 1 | 2 | 11155.00000000 | | 77M0D7D |
| 1 | 2 | 11155.00000000 | | 77M0D7D |
| 1 | 2 | 11155.00000000 | | 77M0D7D |
| 1 | 2 | 11155.00000000 | | 77M0D7D |
| 1 | 3 | 11155.00000000 | | 77M0D7D |
| 1 | 3 | 11155.00000000 | | 77M0D7D |
| 1 | 3 | 11155.00000000 | | 77M0D7D |
| 1 | 3 | 11155.00000000 | | 77M0D7D |
| 1 | 3 | 11155.00000000 | | 77M0D7D |
| 1 | 3 | 11155.00000000 | | 77M0D7D |
| 1 | 3 | 11155.00000000 | | 77M0D7D |
| 1 | 3 | 11155.00000000 | | 77M0D7D |
| 1 | 4 | 11405.00000000 | | 77M0D7D |
| 1 | 4 | 11405.00000000 | | 77M0D7D |
| 1 | 4 | 11405.00000000 | | 77M0D7D |
| 1 | 4 | 11405.00000000 | | 77M0D7D |
| 1 | 4 | 11405.00000000 | | 77M0D7D |
| 1 | 4 | 11405.00000000 | | 77M0D7D |
| 1 | 4 | 11405.00000000 | | 77M0D7D |
| 1 | 4 | 11405.00000000 | | 77M0D7D |
| 1 | 1 | 11485.00000000 | | 77M0D7D |
| 1 | 1 | 11485.00000000 | | 77M0D7D |
| 1 | 1 | 11485.00000000 | | 77M0D7D |
| 1 | 1 | 11485.00000000 | | 77M0D7D |
| 1 | 1 | 11485.00000000 | | 77M0D7D |
| 1 | 1 | 11485.00000000 | | 77M0D7D |
| 1 | 1 | 11485.00000000 | | 77M0D7D |
| 1 | 1 | 11485.00000000 | | 77M0D7D |
| 1 | 2 | 11645.00000000 | | 77M0D7D |
| 1 | 2 | 11645.00000000 | | 77M0D7D |
| 1 | 2 | 11645.00000000 | | 77M0D7D |
| 1 | 2 | 11645.00000000 | | 77M0D7D |
| 1 | 2 | 11645.00000000 | | 77M0D7D |
| 1 | 2 | 11645.00000000 | | 77M0D7D |
| 1 | 2 | 11645.00000000 | | 77M0D7D |
| 1 | 2 | 11645.00000000 | | 77M0D7D |
| 1 | 3 | 11645.00000000 | | 77M0D7D |
| 1 | 3 | 11645.00000000 | | 77M0D7D |
| 1 | 3 | 11645.00000000 | | 77M0D7D |
| 1 | 3 | 11645.00000000 | | 77M0D7D |
| 1 | 3 | 11645.00000000 | | 77M0D7D |
| 1 | 3 | 11645.00000000 | | 77M0D7D |
| 1 | 3 | 11645.00000000 | | 77M0D7D |
| 1 | 3 | 11645.00000000 | | 77M0D7D |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | No Exact Address, Levi, MCLENNAN, TX | 31.35861111, -97.13511111 | 162.000 m | LTOWER | 21.300 m structure / 21.300 m overall | N |
| 2 | R | | 31.35813889, -96.90936111 | 148.400 m | | | |
| 3 | R | | 31.48055556, -96.91191667 | 167.500 m | | | |
| 4 | R | | 31.35025000, -97.24658333 | 195.000 m | | | |
| 5 | R | | 31.37194444, -97.17525000 | 182.000 m | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | T | Jirous JRMC-900-10/11 | | S | 37.5000 | 90.1000 | | |
| 1 | 2 | R | Jirous JRMC-900-10/11 | | | 37.5000 | | | |
| 1 | 3 | R | Jirous JRMC-900-10/11 | | | 37.5000 | | | |
| 1 | 4 | R | Jirous JRMC-900-10/11 | | | 37.5000 | | | |
| 1 | 5 | R | Jirous JRMC-680-10/11 | | | 36.0000 | | | |
| 2 | 1 | T | Jirous JRMC-900-10/11 | | S | 37.5000 | 57.3000 | | |
| 3 | 1 | T | Jirous JRMC-900-10/11 | | S | 37.5000 | 264.9000 | | |
| 4 | 1 | T | Jirous JRMC-680-10/11 | | S | 36.0000 | 291.2000 | | |
License history
| Date | File or call sign | Action |
|---|
| 2026-02-13 | WSIS581 | LIMOD |
| 2025-06-16 | WSIS581 | LIISS |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 5151259 | 2026-08-02 02:47:12 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | WSIS581 | ULS 5151259 | 2026-08-02 02:47:12 |
| Status | A | ULS 5151259 | 2026-08-02 02:47:12 |
| Service | MG | ULS 5151259 | 2026-08-02 02:47:12 |
| Grant Date | 2025-06-16 | ULS 5151259 | 2026-08-02 02:47:12 |
| Expiration Date | 2035-06-16 | ULS 5151259 | 2026-08-02 02:47:12 |