# T-Mobile US founding date

entity: /record/t-mobile-us.md  
predicate: founded  
page: /record/t-mobile-us/founded  
as_of: 2026-11-11  
cite: AsOf. "T-Mobile US founded: 2004", as of 2004-01-01. Claim clm_4ECDF5807212, https://asof.is/claim/clm_4ECDF5807212, accessed 2026-11-11. Source: https://www.sec.gov/Archives/edgar/data/0001283699/000128369914000012/tmus12312013form10k.htm.  

As of November 11, 2026, T-Mobile US's founding date on the AsOf record is 2,004, dated January 1, 2004, from a primary source (sec.gov).

1 claim on T-Mobile US's founding date, 1 open and 0 superseded, each dated and sourced; a replaced value is closed with an end date, never deleted.

## Current founding date

What the record asserts on 2026-11-11.

- [T-Mobile US](/record/t-mobile-us.md) | founded | 2004 | valid 2004-01-01 to present | conf 0.95 | valid | [clm_4ECDF5807212](/claim/clm_4ECDF5807212.md)
  sources: https://www.sec.gov/Archives/edgar/data/0001283699/000128369914000012/tmus12312013form10k.htm

## Every dated value

One claim per line, oldest first. Superseded claims stay visible.

- [T-Mobile US](/record/t-mobile-us.md) | founded | 2004 | valid 2004-01-01 to present | conf 0.95 | valid | [clm_4ECDF5807212](/claim/clm_4ECDF5807212.md)
  sources: https://www.sec.gov/Archives/edgar/data/0001283699/000128369914000012/tmus12312013form10k.htm

## Questions this record answers

### What is T-Mobile US's current founding date?

2,004, dated January 1, 2004, from a primary source (sec.gov). The record asserts this claim as of November 11, 2026 (status valid, confidence 0.95).


## Read on

- This page: /record/t-mobile-us/founded (markdown: /record/t-mobile-us/founded.md)
- Entity twin: /record/t-mobile-us.md · timeline: /timelines/t-mobile-us.md
- Every company's founding date: /facts/founded.md

---

AsOf is a temporal fact ledger: a structured, dated, sourced record of what is true and what changed, built for AI retrieval.