MainStem LLC
51 Monroe St, Suite PE-05, Rockville, MD, 20850, US
Related companies
These separately maintained company records are connected by a confirmed FCC relationship or shared identity evidence. A matching name alone does not establish that two records are the same legal entity, so their filings remain separate.
| Company | FRN | Relationship basis |
|---|---|---|
| MainStem LLC | Shared FCC source history |
Data coverage
| FCC source | Matched entities | Last refreshed |
|---|---|---|
| ELS | 1 | 2026-08-04 11:45:12 |
| ULS | 1 | 2026-08-02 01:21:49 |
Source records and provenance
Each row is an independently retained source identity connected to this company. FCC.report does not overwrite one source with another.
| FCC source | Recorded name | Source identity | Match basis | Last refreshed |
|---|---|---|---|---|
| ELS | MainStem LLC | name:2e4b1b4c201e574580c1eb85:company:423150 | existing filing company | 2026-08-04 11:45:12 |
| ULS | MainStem LLC | frn:0028817096 | exact frn | 2026-08-02 01:21:49 |
Experimental filings
| Filed | File number | Applicant | Status |
|---|---|---|---|
| 2019-09-19 | 0789-EX-CN-2019 | MainStem LLC | Denied/Dismissed |
Universal Licensing System records
| Grant date | Call sign | Service | Status | Frequency | Location | Expiration |
|---|---|---|---|---|---|---|
| 2020-10-07 | WRJQ310 | RS | E | 433 MHz | Rockville, MONTGOMERY, MD | 2020-12-13 |
IBFS / ICFS filings
No filings are available yet.
FCC ID filings
No matched FCC ID filings are available.
Antenna Structure Registration records
No matched antenna structure registrations are available.
Licensing and Management System filings
No matched LMS filings are available.
Public Inspection File facilities
No matched Public Inspection File facilities are available.
Historical CDBS broadcast filings
No matched historical CDBS filings are available.
FCC auction participation
No matched FCC auction bidder records are available.
Robocall Mitigation Database filings
No matched Robocall Mitigation Database filings are available.
Broadband Data Collection providers
No matched BDC provider identifiers are available.
Intermediate Provider Registry
No matched Intermediate Provider Registry entries are available.
Recorded identity details
Values are retained with their source and observation dates; differences are not silently overwritten.
| Field | Recorded value | Source | Observed |
|---|---|---|---|
| Address | 51 Monroe St, Suite PE-05, Rockville, MD, 20850, US | COMPANY | 2026-07-29 - 2026-07-29 |
| Email Domain | blacklynx.tech | ULS | |
| Frn | 0028817096 | ULS | 2026-07-29 - 2026-07-29 |
| Name | MainStem LLC | COMPANY | 2026-07-29 - 2026-07-29 |
| Name | MainStem LLC | ELS | 2026-07-30 - 2026-07-30 |
| Name | MainStem LLC | ULS | 2026-07-29 - 2026-07-29 |
| Phone | 5403167886 | ULS |