Quantum Fiber is currently owned by AT &T, following their acquisition of Lumen Technologies' consumer fiber-to-the-home business, which included the Quantum Fiber brand.

Ownership Timeline

Lumen Technologies (formerly CenturyLink) launched and operated Quantum Fiber as its premium fiber internet service, reaching over 4 million locations across 11 states.

In May 2025, Lumen announced the $5.75 billion sale of about 95% of Quantum Fiber to AT&T, a move to refocus on enterprise services while boosting AT&T's fiber footprint to serve more U.S. households.

The deal closed successfully, transferring over 1 million customers and key assets; as of early 2026, Quantum Fiber operations are integrated under AT&T.

Deal Highlights

  • Coverage boost : AT&T Fiber now reaches roughly double its prior scope by 2030 goals, adding Quantum Fiber's 2.26% U.S. household penetration.
  • Strategic shift : Lumen retained enterprise infrastructure like its fiber backbone and copper services, reducing debt and funding AI network investments.
  • Customer impact : No immediate pricing hikes announced; AT&T emphasizes value continuity.

Aspect| Before Sale (Lumen)| After Sale (AT&T)
---|---|---
Parent Co.| Lumen Technologies| AT&T
Customers| ~1M fiber users| Integrated into AT&T's 12.77% reach
Deal Value| N/A| $5.75B cash (closed)
States| 11 states, 4M+ locations| Same, now under AT&T ops

Forum Buzz & Trending Views

Online discussions lit up post-announcement, especially in affected areas like Denver.

Reddit users noted the shift from "CenturyLink/Quantum Fiber" to AT&T, with mixed reactions—some joked about joining the "AT&T customer club," others worried about service changes amid broadband consolidation (Verizon-Frontier, Charter-Cox deals nearby).

Trending context : By February 2026, this fits a wave of fiber mergers; no major price spikes reported yet, but users speculate on bundling perks or speed upgrades.

"Quantum is owned by Lumen, AKA CenturyLink. Or as of this announcement, you’re now an AT&T customer." – Reddit user zertoman

What It Means Now

AT&T's takeover positions Quantum Fiber as part of the largest U.S. fiber network, promising reliability for homes and businesses—no contracts, unlimited data intact.

If you're a customer, check att.com for updates; service transitions were smooth per public reports.

TL;DR : AT&T owns Quantum Fiber since closing Lumen's 2025 sale—expanding fast fiber access nationwide.

Information gathered from public forums or data available on the internet and portrayed here.