Mast 1231456 — Ukiah, CA
ConstructedFCC Antenna Structure Registration 1231456 — mast near Ukiah, California. Slender vertical mast structure.
At a glance
FCC Antenna Structure Registration 1231456 is a 38 m (124 ft) mast near Ukiah, Mendocino County, California. Its registration status is constructed, with construction recorded on Dec 6, 2001. It is registered to AT&T Mobility Spectrum LLC, which holds 1,606 FCC structure registrations.
Registration record
FCC record
| Field | Value |
|---|---|
| Registration number (ASRN) | 1231456 |
| Unique system identifier | 2629445 |
| Status | Constructed (C) |
| Structure type | Mast (MAST) |
| Date constructed | Dec 6, 2001 |
| Registration issued | Sep 30, 2025 |
Aviation safety
FAA & lighting
| Field | Value |
|---|---|
| FAA study number | 2009-AWP-528-OE |
| FAA circular | 70/7460-1K |
| Painting / lighting spec | 4, 5, 12 |
| Marking / lighting code | FAA Style A (9) |
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
Plano, TX · FRN 0014980726
Holds 1,606 FCC structure registrations — view the full portfolio →
Location
- Address
- 300 SEMENARY ROAD
- City
- Ukiah
- State
- California
- ZIP
- 95482
- County
- Mendocino County
- County FIPS
- 06045
- Coordinates
- 39.14678, -123.21056
Within ~40 km
Nearby structures
Tower (type not specified) · Canceled
Guyed tower · Constructed
Lattice tower · Canceled
Tower (type not specified) · Constructed
Pole · Canceled
Tower (type not specified) · Dismantled
How tall is structure 1231456 compared with others?
At 38 m, structure 1231456 is about 22% above the 31 m average across the 108 structures registered in Mendocino County. It is about 17% above the California average of 32 m across 11,860 registrations. Among the 3,482 registrations nationwide filed under the same structure-type code (MAST), the average overall height is 53 m, so this one is about 29% below that figure.
The supporting structure itself measures 31 m; antennas and other appurtenances on top bring the overall height above ground to 38 m. The site's filed ground elevation is 196 m, which puts the top of the structure 234 m above mean sea level.
Where is structure 1231456, and what is registered around it?
The registration places the structure near Ukiah in Mendocino County, California, at coordinates 39.14678, -123.21056, with the site address filed as "300 SEMENARY ROAD". Mendocino County has 108 FCC-registered antenna structures, the 27th-largest count among the 58 California counties with registrations, and 50 of them are marked constructed. California as a whole has 11,860 registrations, the 2nd-largest total among the 50 states and DC.
The tallest other registered structure within about 40 km is Uklah, CA · 1000098, a tower at 76 m (canceled).
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 1231456 on Sep 30, 2025. Nationally, 141,895 of the 197,770 registrations (71.7%) carry the constructed status, including 6,866 in California.
Who owns antenna structure 1231456?
The FCC record lists AT&T Mobility Spectrum LLC of Plano, TX as the registered owner, under FCC Registration Number 0014980726. Across the registry it holds 1,606 structure registrations, the 20th-largest portfolio among the 7,865 owners with two or more, including 433 in California. Its most common filed structure-type code is MTOWER (627 registrations).
What FAA and lighting details are on file?
The registration cites FAA aeronautical study 2009-AWP-528-OE and FAA Advisory Circular 70/7460-1K, the FAA review of the structure's effect on air navigation. Its marking and lighting code, 9, is listed on the FCC registration form as "FAA Style A". The painting and lighting specification on file cites FAA chapters 4, 5, 12.
Frequently asked questions
How tall is antenna structure 1231456?
Its registered overall height above ground is 38 m (124 ft), and 234 m (768 ft) above mean sea level.
Who owns tower 1231456?
The registered owner is AT&T Mobility Spectrum LLC, which holds 1,606 FCC antenna structure registrations.
Where is antenna structure 1231456?
It is located near Ukiah, Mendocino County, California at 300 SEMENARY ROAD (39.14678, -123.21056). Its status is constructed; it was constructed on Dec 6, 2001.
What type of structure is 1231456?
It is filed with the FCC under structure-type code MAST, which decodes to "Mast". Slender vertical mast structure. 3,482 registrations nationwide use the same code.
How many antenna structures are registered in Mendocino County, CA?
Mendocino County has 108 FCC-registered antenna structures, 50 of them constructed — the 27th-largest count among 58 counties in California.
Related pages
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Dataset updated . Source: FCC Antenna Structure Registration 1231456, weekly bulk file.
About this data
Source: FCC Antenna Structure Registration (ASR) database, as published October 13, 2026 — TowerCensus refreshes it weekly. See the methodology for how records are matched, cleaned and scored.
Cite as: TowerCensus, “Antenna structure 1231456, Ukiah, Mendocino County, California”, https://towercensus.com/towers/california/ukiah-1231456 (data as of October 13, 2026).