Building 1231203 — Concord, CA
ConstructedFCC Antenna Structure Registration 1231203 — building near Concord, California. Antenna mounted on the roof or side of a building.
At a glance
FCC Antenna Structure Registration 1231203 is a 11 m (36 ft) building near Concord, Contra Costa County, California. Its registration status is constructed, with construction recorded on May 8, 2001. It is registered to T-Mobile West LLC, which holds 1,634 FCC structure registrations.
Registration record
FCC record
| Field | Value |
|---|---|
| Registration number (ASRN) | 1231203 |
| Unique system identifier | 2629192 |
| Status | Constructed (C) |
| Structure type | Building (B) |
| Date constructed | May 8, 2001 |
| Registration issued | Jul 9, 2021 |
Aviation safety
FAA & lighting
| Field | Value |
|---|---|
| FAA study number | 01-AWP-4253-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 0002837276
Holds 1,634 FCC structure registrations — view the full portfolio →
Location
- Address
- 4180 Treat Blvd.
- City
- Concord
- State
- California
- ZIP
- 94518
- County
- Contra Costa County
- County FIPS
- 06013
- Coordinates
- 37.95447, -122.00206
Within ~40 km
Nearby structures
Tower (type not specified) · Granted (not yet constructed)
Building with antenna · Terminated
Building with antenna · Granted (not yet constructed)
Building with antenna · Terminated
Building with pipe · Constructed
Building with antenna · Terminated
How tall is structure 1231203 compared with others?
At 11 m, structure 1231203 is about 39% of the 28 m average across the 216 structures registered in Contra Costa County. It is about 34% of the California average of 32 m across 11,860 registrations. Among the 1,817 registrations nationwide filed under the same structure-type code (B), the average overall height is 42 m, so this one is about 26% of that figure.
The site's filed ground elevation is 66 m, which puts the top of the structure 77 m above mean sea level.
Where is structure 1231203, and what is registered around it?
The registration places the structure near Concord in Contra Costa County, California, at coordinates 37.95447, -122.00206, with the site address filed as "4180 Treat Blvd.". Contra Costa County has 216 FCC-registered antenna structures, the 14th-largest count among the 58 California counties with registrations, and 116 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 Bethel Island, CA · 1022770, a tower at 221 m (granted (not yet 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 1231203 on Jul 9, 2021. Nationally, 141,895 of the 197,770 registrations (71.7%) carry the constructed status, including 6,866 in California.
Who owns antenna structure 1231203?
The FCC record lists T-Mobile West LLC of Bellevue, WA as the registered owner, under FCC Registration Number 0002837276. Across the registry it holds 1,634 structure registrations, the 17th-largest portfolio among the 7,865 owners with two or more, including 785 in California. Its most common filed structure-type code is BANT (372 registrations).
What FAA and lighting details are on file?
The registration cites FAA aeronautical study 01-AWP-4253-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 1231203?
Its registered overall height above ground is 11 m (36 ft), and 77 m (253 ft) above mean sea level.
Who owns tower 1231203?
The registered owner is T-Mobile West LLC, which holds 1,634 FCC antenna structure registrations.
Where is antenna structure 1231203?
It is located near Concord, Contra Costa County, California at 4180 Treat Blvd. (37.95447, -122.00206). Its status is constructed; it was constructed on May 8, 2001.
What type of structure is 1231203?
It is filed with the FCC under structure-type code B, which decodes to "Building". Antenna mounted on the roof or side of a building. 1,817 registrations nationwide use the same code.
How many antenna structures are registered in Contra Costa County, CA?
Contra Costa County has 216 FCC-registered antenna structures, 116 of them constructed — the 14th-largest count among 58 counties in California.
Related pages
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Dataset updated . Source: FCC Antenna Structure Registration 1231203, 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 1231203, Concord, Contra Costa County, California”, https://towercensus.com/towers/california/concord-1231203 (data as of October 13, 2026).