Mast 1207121 — Alton, IL
ConstructedFCC Antenna Structure Registration 1207121 — mast near Alton, Illinois. Slender vertical mast structure.
At a glance
FCC Antenna Structure Registration 1207121 is a 47 m (155 ft) mast near Alton, Madison County, Illinois. Its registration status is constructed, with construction recorded on Apr 12, 2000. It is registered to American Towers LLC, which holds 21,809 FCC structure registrations.
Registration record
FCC record
| Field | Value |
|---|---|
| Registration number (ASRN) | 1207121 |
| Unique system identifier | 2603989 |
| Status | Constructed (C) |
| Structure type | Mast (MAST) |
| Date constructed | Apr 12, 2000 |
| Registration issued | Jan 15, 2013 |
Aviation safety
FAA & lighting
| Field | Value |
|---|---|
| FAA study number | 2005-AGL-7683-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
Woburn, MA · FRN 0011498342
Holds 21,809 FCC structure registrations — view the full portfolio →
Location
- Address
- 4419 Martin Luther King Dr. (DES 50- #050464)
- City
- Alton
- State
- Illinois
- ZIP
- 62035
- County
- Madison County
- County FIPS
- 17119
- Coordinates
- 38.92928, -90.18758
Within ~40 km
Nearby structures
Tower (type not specified) · Canceled
Tower (type not specified) · Constructed
Tower (type not specified) · Constructed
Tower (type not specified) · Terminated
Guyed tower · Constructed
Guyed tower · Granted (not yet constructed)
How tall is structure 1207121 compared with others?
At 47 m, structure 1207121 is about 31% below the 69 m average across the 185 structures registered in Madison County. It is about 31% below the Illinois average of 69 m across 7,110 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 12% below that figure.
The supporting structure itself measures 46 m; antennas and other appurtenances on top bring the overall height above ground to 47 m. The site's filed ground elevation is 183 m, which puts the top of the structure 230 m above mean sea level.
Where is structure 1207121, and what is registered around it?
The registration places the structure near Alton in Madison County, Illinois, at coordinates 38.92928, -90.18758, with the site address filed as "4419 Martin Luther King Dr. (DES 50- #050464)". Madison County has 185 FCC-registered antenna structures, the 7th-largest count among the 102 Illinois counties with registrations, and 122 of them are marked constructed. Illinois as a whole has 7,110 registrations, the 6th-largest total among the 50 states and DC.
The tallest other registered structure within about 40 km is St. Louis, MO · 1261728, a tower at 369 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 1207121 on Jan 15, 2013. Nationally, 141,895 of the 197,770 registrations (71.7%) carry the constructed status, including 5,177 in Illinois.
Who owns antenna structure 1207121?
The FCC record lists American Towers LLC of Woburn, MA as the registered owner, under FCC Registration Number 0011498342. Across the registry it holds 21,809 structure registrations, the largest portfolio among the 7,865 owners with two or more, including 881 in Illinois. Its most common filed structure-type code is LTOWER (5,885 registrations).
What FAA and lighting details are on file?
The registration cites FAA aeronautical study 2005-AGL-7683-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 1207121?
Its registered overall height above ground is 47 m (155 ft), and 230 m (754 ft) above mean sea level.
Who owns tower 1207121?
The registered owner is American Towers LLC, which holds 21,809 FCC antenna structure registrations.
Where is antenna structure 1207121?
It is located near Alton, Madison County, Illinois at 4419 Martin Luther King Dr. (DES 50- #050464) (38.92928, -90.18758). Its status is constructed; it was constructed on Apr 12, 2000.
What type of structure is 1207121?
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 Madison County, IL?
Madison County has 185 FCC-registered antenna structures, 122 of them constructed — the 7th-largest count among 102 counties in Illinois.
Related pages
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Dataset updated . Source: FCC Antenna Structure Registration 1207121, 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 1207121, Alton, Madison County, Illinois”, https://towercensus.com/towers/illinois/alton-1207121 (data as of October 13, 2026).