Tower 1257799 — San Lorenzo, CA
ConstructedFCC Antenna Structure Registration 1257799 — tower (type not specified) near San Lorenzo, California. Filed under the FCC's older general tower code, which does not record whether the tower is guyed, lattice or a monopole.
At a glance
FCC Antenna Structure Registration 1257799 is a 12 m (40 ft) tower near San Lorenzo, Alameda County, California. Its registration status is constructed, with construction recorded on Sep 21, 2006. It is registered to T-Mobile West Tower LLC, which holds 1,035 FCC structure registrations.
Registration record
FCC record
| Field | Value |
|---|---|
| Registration number (ASRN) | 1257799 |
| Unique system identifier | 2656965 |
| Status | Constructed (C) |
| Structure type | Tower (type not specified) (TOWER) |
| Date constructed | Sep 21, 2006 |
| Registration issued | Jan 23, 2026 |
Aviation safety
FAA & lighting
| Field | Value |
|---|---|
| FAA study number | 2006-AWP-4936-OE |
| FAA circular | — |
| Painting / lighting spec | NONE |
| Marking / lighting code | None (1) |
The painting/lighting specification is copied as filed: the FAA marking and lighting chapters and paragraphs cited in the ASR record. The marking/lighting code is decoded using the FCC registration form's code list.
Registered owner
Bellevue, WA · FRN 0022193262
Holds 1,035 FCC structure registrations — view the full portfolio →
Location
- Address
- 820 Bockman Road (BA12037)
- City
- San Lorenzo
- State
- California
- ZIP
- 94580
- County
- Alameda County
- County FIPS
- 06001
- Coordinates
- 37.66936, -122.12764
Within ~40 km
Nearby structures
Lattice tower · Constructed
Building with antenna · Constructed
Building with antenna · Terminated
Building with antenna · Granted (not yet constructed)
Tower (type not specified) · Constructed
Building with antenna · Terminated
How tall is structure 1257799 compared with others?
At 12 m, structure 1257799 is about 40% of the 31 m average across the 420 structures registered in Alameda County. It is about 38% of the California average of 32 m across 11,862 registrations. Among the 75,198 registrations nationwide filed under the same structure-type code (TOWER), the average overall height is 76 m, so this one is about 16% of that figure.
The site's filed ground elevation is 10 m, which puts the top of the structure 22 m above mean sea level.
Where is structure 1257799, and what is registered around it?
The registration places the structure near San Lorenzo in Alameda County, California, at coordinates 37.66936, -122.12764, with the site address filed as "820 Bockman Road (BA12037)". Alameda County has 420 FCC-registered antenna structures, the 9th-largest count among the 58 California counties with registrations, and 231 of them are marked constructed. California as a whole has 11,862 registrations, the 2nd-largest total among the 50 states and DC.
The tallest other registered structure within about 40 km is San Francisco, CA · 1001289, a lattice tower at 298 m (constructed).
What does the status "Constructed" mean?
Constructed means the owner has notified the FCC that construction is complete, so the registry treats the structure as standing. The FCC issued registration 1257799 on Jan 23, 2026. Nationally, 141,898 of the 197,833 registrations (71.7%) carry the constructed status, including 6,869 in California.
Who owns antenna structure 1257799?
The FCC record lists T-Mobile West Tower LLC of Bellevue, WA as the registered owner, under FCC Registration Number 0022193262. Across the registry it holds 1,035 structure registrations, the 27th-largest portfolio among the 7,865 owners with two or more, including 235 in California. Its most common filed structure-type code is MTOWER (433 registrations).
What FAA and lighting details are on file?
The registration cites FAA aeronautical study 2006-AWP-4936-OE, the FAA review of the structure's effect on air navigation. Its marking and lighting code, 1, is listed on the FCC registration form as "None".
Frequently asked questions
How tall is antenna structure 1257799?
Its registered overall height above ground is 12 m (40 ft), and 22 m (73 ft) above mean sea level.
Who owns tower 1257799?
The registered owner is T-Mobile West Tower LLC, which holds 1,035 FCC antenna structure registrations.
Where is antenna structure 1257799?
It is located near San Lorenzo, Alameda County, California at 820 Bockman Road (BA12037) (37.66936, -122.12764). Its status is constructed; it was constructed on Sep 21, 2006.
What type of structure is 1257799?
It is filed with the FCC under structure-type code TOWER, which decodes to "Tower (type not specified)". Filed under the FCC's older general tower code, which does not record whether the tower is guyed, lattice or a monopole. 75,198 registrations nationwide use the same code.
How many antenna structures are registered in Alameda County, CA?
Alameda County has 420 FCC-registered antenna structures, 231 of them constructed — the 9th-largest count among 58 counties in California.
Related pages
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Dataset updated . Source: FCC Antenna Structure Registration 1257799, weekly bulk file.
About this data
Source: FCC Antenna Structure Registration (ASR) database, as published October 20, 2026 — TowerCensus refreshes it weekly. See the methodology for how records are matched, cleaned and scored.
Cite as: TowerCensus, “Antenna structure 1257799, San Lorenzo, Alameda County, California”, https://towercensus.com/towers/california/san-lorenzo-1257799 (data as of October 20, 2026).