T-MOBILE NORTHEAST
ActiveGeneral Business · Washington, DC, DC
At a glance
Public records place T-MOBILE NORTHEAST at 2 active locations in 2 Washington office buildings. Locations include 300 M ST SE; 1801 K Street.
Public record — Washington, DC
Office locations (2 active)
| Building | Suite / floor | Submarket | Since | Source | Match |
|---|---|---|---|---|---|
| 300 M ST SE | — | Washington | Aug 2025 | DC business licence | folio match · high |
| 1801 K Street1801 K ST NW | — | Washington | Aug 2025 | DC business licence | folio match · high |
Where does T-MOBILE NORTHEAST operate in Washington?
The earliest active record dates from Aug 2025 and the most recent from Aug 2025.
Across Washington, 5,289 active business locations are matched to office buildings; T-MOBILE NORTHEAST accounts for 2 of them.
How does BuildingCensus know T-MOBILE NORTHEAST is at these addresses?
Each location is a business record whose premises address was matched to a county office parcel (record types on this page: DC business licence). The match method and confidence are shown on every row.
A record at an address is evidence that the business operates there, not a lease: records lag moves by months, and businesses without a local record at an address do not appear.
Frequently asked questions
Where are T-MOBILE NORTHEAST's offices in Washington?
Public records place T-MOBILE NORTHEAST at 2 active locations in Washington, DC: 300 M ST SE; 1801 K Street.
How long has T-MOBILE NORTHEAST been at its Washington locations?
The earliest active record starts Aug 2025; the newest Aug 2025. Start dates are when the record was opened, which can trail the actual move-in.
Related
Data provenance — public records only
- Washington, DC — Integrated Tax System public extract (owner names, mailing addresses, assessments), CAMA commercial and daily sales tables, Basic Business Licenses (suite-level premises; the universal catch-all licence was repealed Oct 2025, thinning the roll thereafter), and DOEE energy benchmarking.
Every fact on this page is drawn from the government records above — no listing sites, no scraped platforms, no third-party images. Facts from public records are uncopyrightable; each tenancy row carries its source and match confidence. Records can lag reality — a business-tax receipt or registration at an address is evidence of occupancy, not a lease confirmation.
Dataset updated . Locations from Washington, DC business records matched to county office parcels.
About this data
Source: Integrated Tax System public extract (Washington, DC), as published October 9, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “T-MOBILE NORTHEAST — Washington office locations”, https://buildingcensus.com/offices/dc/companies/t-mobile-northeast (data as of October 9, 2026).