Universal Licensing System
WPQX525
BACKLINK IV, LLC
License details
| ULS identifier | 1305517 |
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| Call sign | WPQX525 |
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| Radio service | CF |
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| Status | C |
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| Grant date | 2000-11-07 |
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| Expiration | 2010-11-07 |
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| Cancellation | 2002-06-26 |
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| Frequency range | 17840 - 21625 MHz (3 frequencies) |
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| Locations | 4 |
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| Representative location | CAMBRIDGE, MIDDLESEX, MA |
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| Coordinates | 42.3945833, -71.1458889 |
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| Source archive | l_micro.zip |
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| Dataset refreshed | 2026-08-09 15:43:36 |
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Licensee
| Name | BACKLINK IV, LLC |
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| Applicant type | L |
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| Location | Herndon, VA |
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| Address | 460 Herndon Parkway, Suite 100, Herndon, VA, 20170 |
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| Phone | 7033264650 |
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| Email | [email protected] |
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Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
|---|
| 1 | 1 | FXO | 17840.00000000 | | | | | |
| 1 | 2 | FXO | 21375.00000000 | | | | | |
| 1 | 3 | FXO | 21625.00000000 | | | | | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 1 | 17840.00000000 | | 40M0F7W |
| 1 | 2 | 21375.00000000 | | 40M0F7W |
| 1 | 3 | 21625.00000000 | | 40M0F7W |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | 150 CAMBRIDGE PARK DR, CAMBRIDGE, MIDDLESEX, MA | 42.39458333, -71.14588889 | 6.700 m | BPOLE | 46.300 m structure / 48.800 m overall | |
| 2 | R | | 42.37183333, -71.12283333 | 3.000 m | | | |
| 3 | R | | 42.39513889, -71.14608333 | 13.700 m | | | |
| 4 | R | | 42.38955556, -71.14563889 | 14.900 m | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | T | RADIO WAVES INC HP2-18 | | V | 39.0000 | 143.1000 | | |
| 1 | 2 | R | RADIO WAVES INC HP2-18 | | | 39.0000 | | | |
| 1 | 3 | R | radio waves inc HPLP1.5-23 | | | 37.8000 | | | |
| 1 | 4 | R | RADIO WAVES INC HPLP1.5-23 | | | 37.8000 | | | |
| 2 | 1 | T | RADIO WAVES INC HPLP1.5-23 | | V | 37.8000 | 345.5000 | | |
| 3 | 1 | T | RADIO WAVES INC HPLP1.5-23 | | V | 37.8000 | 177.6000 | | |
License history
| Date | File or call sign | Action |
|---|
| 2002-06-27 | WPQX525 | LICAN |
| 2002-06-25 | WPQX525 | LIASS |
| 2001-09-07 | WPQX525 | LIASS |
| 2001-09-06 | WPQX525 | LITRAN |
| 2000-11-07 | WPQX525 | LIISS |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 1305517 | 2026-08-09 15:43:36 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | WPQX525 | ULS 1305517 | 2026-08-09 15:43:36 |
| Status | C | ULS 1305517 | 2026-08-09 15:43:36 |
| Service | CF | ULS 1305517 | 2026-08-09 15:43:36 |
| Grant Date | 2000-11-07 | ULS 1305517 | 2026-08-09 15:43:36 |
| Expiration Date | 2010-11-07 | ULS 1305517 | 2026-08-09 15:43:36 |
| Cancellation Date | 2002-06-26 | ULS 1305517 | 2026-08-09 15:43:36 |