List of AT&T Centrex Customers
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United States
Since 2010, our global team of researchers has been studying AT&T Centrex customers around the world, aggregating massive amounts of data points that form the basis of our forecast assumptions and perhaps the rise and fall of certain vendors and their products on a quarterly basis.
Each quarter our research team identifies companies that have purchased AT&T Centrex for PBX, VoiP and Phone Systems from public (Press Releases, Customer References, Testimonials, Case Studies and Success Stories) and proprietary sources, including the customer size, industry, location, implementation status, partner involvement, LOB Key Stakeholders and related IT decision-makers contact details.
Companies using AT&T Centrex for PBX, VoiP and Phone Systems include: The State of Georgia, a United States based Government organisation with 71000 employees and revenues of $28.00 billion, Chicago Public Schools, a United States based Education organisation with 43829 employees and revenues of $8.84 billion, Little Falls Police Department United States, a United States based Government organisation with 40 employees and revenues of $6.0 million and many others.
Contact us if you need a completed and verified list of companies using AT&T Centrex, including the breakdown by industry (21 Verticals), Geography (Region, Country, State, City), Company Size (Revenue, Employees, Asset) and related IT Decision Makers, Key Stakeholders, business and technology executives responsible for the software purchases.
The AT&T Centrex customer wins are being incorporated in our Enterprise Applications Buyer Insight and Technographics Customer Database which has over 100 data fields that detail company usage of software systems and their digital transformation initiatives. Apps Run The World wants to become your No. 1 technographic data source!
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| Logo | Customer | Industry | Empl. | Revenue | Country | Vendor | Application | Category | When | SI | Insight |
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Chicago Public Schools | Education | 43829 | $8.8B | United States | AT&T | AT&T Centrex | PBX, VoiP and Phone Systems | 2006 | n/a |
In 2006, Chicago Public Schools replaced more than 19,000 AT&T Centrex lines with a Mitel IP PBX and VoIP rollout as part of a district wide PBX, VoiP and Phone Systems modernization. The project is documented as a communications and IT initiative in Chicago, United States, aimed at reducing recurring AT&T Centrex line rental charges.
The Mitel implementation centralized call control, VoIP telephony and enterprise voicemail capabilities, provisioning staff voicemail across school sites. The AT&T Centrex service had previously delivered analog line rentals, while the Mitel IP PBX provided SIP aligned call routing, voicemail and converged voice services consistent with PBX, VoiP and Phone Systems deployments.
Deployment covered the entire district and was managed by the district communications and IT teams, encompassing line decommissioning, service cutover and PBX configuration management. Operational scope included staff telephony provisioning and voicemail rollout to educators and administrative staff across Chicago Public Schools.
The district reported cost savings of approximately $6M per year from reduced Centrex charges and cited improved functionality such as voicemail for staff as a business driver. These outcomes framed the PBX, VoiP and Phone Systems project as a finance driven communications modernization.
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Little Falls Police Department United States | Government | 40 | $6M | United States | AT&T | AT&T Centrex | PBX, VoiP and Phone Systems | 2015 | n/a |
In 2015, Little Falls Police Department implemented AT&T Centrex as part of a PBX, VoiP and Phone Systems deployment serving local government public safety in New Jersey. The implementation targeted the police department’s telephony and emergency call handling functions, aligning the AT&T Centrex configuration with front-line 911 call workflows and station-level communications needs.
The AT&T Centrex deployment included standard PBX capabilities typical of the PBX, VoiP and Phone Systems category, including centralized call routing and hunt group configuration, operator console handling, voicemail and automated attendant services, and prioritization for emergency call handling. Configuration work emphasized call routing logic and dial plan rules to ensure direct paths for emergency calls and clear escalation paths for incident response teams.
Operational coverage focused on the Little Falls Police Department in New Jersey and integrated telephony functions with public-safety workflows for dispatch and response coordination. Governance centered on departmental telecommunication policies and on-site operational procedures for 911 call handling, with configuration and routing controls managed by local IT and communications staff. The deployment supported improved 911 call routing as an explicit outcome for the police department’s public-safety communications.
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The State of Georgia | Government | 71000 | $28.0B | United States | AT&T | AT&T Centrex | PBX, VoiP and Phone Systems | 2013 | n/a |
In 2013, The State of Georgia implemented AT&T Centrex as a statewide voice refresh under the PBX, VoiP and Phone Systems category. The FY2013 state IT report documents a coordinated migration that consolidated voice services across many state agencies and refreshed tens of thousands of Centrex phones. The program migrated and refreshed over 33,000 Centrex phones and lines by October 2013 as recorded in the report, and it was executed as an IT and telecom initiative for Georgia state government covering statewide agency voice infrastructure.
Deployment centered on centralized AT&T Centrex provisioning and voice trunk consolidation, aligning managed line provisioning, handset refresh cycles, and switching configurations consistent with PBX, VoiP and Phone Systems practices. Implementation workstreams included inventory rationalization, staged cutovers for agency voice circuits, and endpoint replacement phases to standardize telephony endpoints. Governance and rollout milestones were tracked through the state IT reporting process and the FY2013 state IT report documents program milestones and the October 2013 completion target, reflecting consolidation of voice services and standardized telephony operations across Georgia state agencies.
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