Cell towers in Hillsborough, California
The FCC register lists 5 antenna structures in and around Hillsborough. That is the 288th highest count of any place in California.
Overview
Hillsborough, CA has 5 registered antenna structures on the FCC register — the 288th largest count among the 801 places in California that have any.
Area density is 0.81 per square mile — usually the more telling figure for infrastructure that follows terrain, roads and line of sight rather than population.
At a median of 9 m (31 ft), structures here run 60.0% shorter than the California median of 24 m (77 ft).
The oldest structure on file here was registered in 1986, the newest in 2020 — 34 years of build-out visible in one register.
Structure types
| Pole | 4 | 80% |
| Monopole | 1 | 20% |
Largest registered owners
owner is not the same as carrier| Pti US Towers II, LLC Tower company | 1 | 20% |
| Gte Mobilnet of California Limited Partnership Other | 1 | 20% |
| Cctm1 LLC Other | 1 | 20% |
| At&t Mobility Spectrum LLC Carrier | 1 | 20% |
| Ccatt LLC Tower company | 1 | 20% |
Tallest registered structures
| Height | Type | Built | Owner | ASR |
|---|---|---|---|---|
| 29 m (96 ft) | Pole | 2014 | Pti US Towers II, LLC | 2676792 |
| 18 m (60 ft) | Monopole | 2020 | Ccatt LLC | 2697453 |
| 9.4 m (31 ft) | Pole | 1996 | Cctm1 LLC | 612340 |
| 9.1 m (30 ft) | Pole | 1991 | Gte Mobilnet of California Limited Partnership | 120674 |
| 8.5 m (28 ft) | Pole | 1986 | At&t Mobility Spectrum LLC | 2680737 |
When they were registered
| 1980s | 1 | 20% |
| 1990s | 2 | 40% |
| 2010s | 1 | 20% |
| 2020s | 1 | 20% |
Nearby places
- Burlingame 7
- San Mateo 8
- Millbrae 14
- San Bruno 23
- San Carlos 10
About this data
Figures are drawn from the FCC's public antenna structure register (2026-08-23). It covers structures that need registering — broadly those over 200 feet or close to an airport — and not the many shorter installations that carry mobile traffic.
The FCC Antenna Structure Registration database covers structures that require registration — generally those over 200 feet or near airports. Many small cells, rooftop antennas and short towers are not registered and will not appear here.
"Owner" is the entity that registered the structure, usually a tower company such as American Tower or Crown Castle. It does not indicate which carriers operate equipment on the structure.