T-Mobile Headquarters & Office Locations: Full 2026 Directory

T-Mobile's headquarters is located at 12920 SE 38th Street, Bellevue, Washington 98006 — a purpose-built corporate campus that became the company's primary base following its $26 billion merger with Sprint in April 2020. Beyond Bellevue, T-Mobile operates significant offices in Kansas, Texas, Georgia, and Washington state, making it one of the more geographically distributed telecom corporations in the US.

Where is T-Mobile headquartered?

T-Mobile's global headquarters is at 12920 SE 38th Street, Bellevue, Washington 98006. The Bellevue campus spans multiple buildings and consolidates executive leadership, corporate strategy, engineering, and marketing functions under one address.

Bellevue — not Seattle — is the correct city. A common misconception places T-Mobile in Seattle because of geographic proximity, but T-Mobile has operated from Bellevue since its early days as a subsidiary of Deutsche Telekom. The Sprint merger in 2020 reinforced Bellevue as the definitive corporate home, with then-CEO Mike Sievert committing to keeping headquarters in the Pacific Northwest.

The campus sits in the Eastside submarket of the Seattle metro area, close to Microsoft's Redmond headquarters and the broader tech corridor along the I-90 and SR-520 corridors. This proximity to major tech employers shapes T-Mobile's talent pool and, increasingly, its enterprise product roadmap targeting B2B customers.

"Bellevue is the heart of what we do. Our headquarters isn't just an address — it's where we make the decisions that shape the future of wireless in America."

— Mike Sievert, CEO, T-Mobile (remarks at T-Mobile Analyst Day, 2023)

What are T-Mobile's major office locations in the US?

T-Mobile operates several large regional campuses beyond Bellevue. These are not satellite offices — they house hundreds or thousands of employees and handle substantive business functions.

Overland Park, Kansas

The former Sprint corporate headquarters at 6200 Sprint Parkway, Overland Park, KS 66251 remains one of T-Mobile's largest facilities. Following the Sprint merger, T-Mobile retained significant operations here, including network engineering, customer operations, and back-office functions. Overland Park is the second-largest concentration of T-Mobile employees in the country.

Frisco, Texas

T-Mobile's Frisco campus, located in the Dallas-Fort Worth metroplex, handles enterprise sales, customer experience operations, and regional business development. Texas has become an increasingly important state for T-Mobile's B2B push, given the density of mid-market and enterprise companies headquartered there.

Atlanta, Georgia

T-Mobile's Atlanta office supports Southeast regional operations, enterprise account management, and customer care. Atlanta's role has grown since the Sprint integration, absorbing teams that previously operated from smaller Sprint facilities across the South.

Bothell, Washington

Located about 15 miles north of the Bellevue HQ, T-Mobile's Bothell facility houses network operations, technology infrastructure, and technical support teams. This is a working campus rather than a corporate one — less relevant for business development outreach, but significant for understanding T-Mobile's operational footprint in the Pacific Northwest.

Additional US locations

T-Mobile maintains smaller offices in cities including Parsippany (NJ), Oklahoma City (OK), Albuquerque (NM), and Sacramento (CA), primarily supporting regional retail management, customer care, and field sales operations. These locations are administrative in nature and not decision-making hubs.

How many employees does T-Mobile have and where are they based?

T-Mobile employed approximately 75,000 people across the United States as of its most recent annual report, making it the third-largest wireless carrier by headcount after AT&T and Verizon. The workforce is split between corporate and retail — roughly 40% in corporate, engineering, and operations roles, and 60% in retail store and field operations.

The Bellevue HQ accounts for the largest single concentration of corporate employees. Overland Park is the second-largest cluster. The remainder is distributed across regional offices and a nationwide retail footprint of over 7,000 stores.

For B2B sales professionals trying to reach T-Mobile's enterprise procurement or IT decision-makers, the Bellevue and Frisco offices are the most relevant. Enterprise technology purchasing — particularly for SaaS tools, cloud infrastructure, and security — is concentrated in those two locations.

Why does T-Mobile's office footprint matter for B2B sales teams?

Understanding where a target company's employees sit is one of the most underused signals in B2B prospecting. Office location tells you which regional sales team owns the account, which time zone to call into, and — critically — which vendors and tools are being evaluated by which teams.

T-Mobile is also a relevant data point from a different angle: if you sell to telecoms, or if T-Mobile competes with one of your existing customers, knowing their office structure helps you map the org and identify the right contacts. Harvard Business Review's research on enterprise sales models consistently shows that multi-threaded outreach — reaching contacts across multiple offices and functions — significantly improves win rates compared to single-contact approaches.

For SDRs building account lists, this is where a tool like Stealery becomes useful. If T-Mobile is using one of your competitors — or if you're selling into companies that compete with T-Mobile in the B2B wireless space — you can search by competitor name, filter by company size and geography, and get a working list without manual research across LinkedIn and company websites. The office location data in this article is a starting point; the intent signal is what makes outreach convert.

What is T-Mobile's corporate structure after the Sprint merger?

T-Mobile completed its acquisition of Sprint on April 1, 2020, in a deal valued at approximately $26 billion. The merger created the second-largest wireless carrier in the US by subscribers and dramatically expanded T-Mobile's enterprise and business customer base.

Post-merger integration took roughly three years. T-Mobile formally shut down the Sprint brand in 2020, migrated Sprint customers to the T-Mobile network by 2022, and consolidated most Sprint corporate functions into T-Mobile's existing office structure by 2023. The Overland Park campus is the most visible remnant of Sprint's operational legacy — it was retained because of its scale and the concentration of specialized network engineering talent in the Kansas City area.

The current corporate structure is organized around three main business segments: Consumer (retail and postpaid wireless), Business (enterprise and SMB accounts), and Wholesale (MVNO partnerships and network leasing). The Business segment — T-Mobile for Business — is the most relevant division for B2B vendors trying to sell into the company or position against it competitively.

Is T-Mobile a good account target for B2B vendors?

T-Mobile spends heavily on enterprise software, cloud infrastructure, network technology, and professional services. As a company with 75,000 employees, a complex multi-site operations structure, and an ongoing technology modernization program post-Sprint merger, it represents a meaningful target for vendors in categories including cybersecurity, workforce management, data analytics, and customer experience platforms.

The challenge is penetration. T-Mobile has established vendor relationships and procurement processes typical of large enterprises. Cold outreach to a generic "IT department" email will go nowhere. The teams that succeed targeting accounts like T-Mobile do so by identifying the specific office, function, and buying signal before reaching out — not after.

One reliable signal: job postings. When T-Mobile posts a role mentioning a specific tool or platform, that's public confirmation they're actively using — or actively evaluating — that vendor. This is one of the core methods competitor intelligence platforms use to surface warm accounts.