Cyllon Systems International, Ltd.

Status: Defunct
Founded: Early 1980s (Approx.)
Founder(s): Andy Keeves and Jeff Black
Location: Westchester County, New York (with earlier listings in Rego Park, NY)
Industry: Technology, Bulletin Board Systems (BBS), Networking & IT Solutions
Role: Former owner/operator of ExecNet, (ExecNet was acquired by: Image’FX Productions Inc.)

Cyllon Systems International, Ltd. was a New York–based technology and networking firm active throughout the 1980s and early–mid 1990s. While the exact founding date is unclear, trade directories show Cyllon operating as early as 1982–1983 from Rego Park, NY, later moving operations to Westchester County.

The company provided IT consulting, networking services, business software solutions, and BBS hosting. Cyllon Systems became best known for owning and supporting ExecNet, one of the earliest professional bulletin board systems for LAN and networking specialists.

Historical records show that Cyllon Systems held trademarks (such as the 1990 “ILINK” filing), appeared in multiple industry directories, and was assigned an Internet Class C network block (NET-EXECNET-COM), confirming its role as a legitimate technology provider during the transitional era between BBS systems and the emerging commercial internet.

Cyllon Systems owned and operated ExecNet during its most active years, providing infrastructure, hosting, and ongoing development.
The company supported the BBS’s networking forums, software libraries, and system administration tools that helped create one of the most respected professional communities of its time.

By the mid-1990s, as the commercial internet overtook traditional bulletin board systems, Cyllon Systems’ business model became increasingly difficult to sustain. The company eventually ceased operations, along with many similar firms of the era.

To prevent ExecNet from disappearing, Thomas Juliano and Image’FX Productions acquired the system, preserving elements of its software, archives, and community to continue its legacy in a modern web-based environment.

• Played a foundational role in early IT and networking communities.

• Supported one of the most influential BBS platforms for system administrators and LAN professionals.

• Helped bridge the transition from BBS networks to early internet-based collaboration.

• Though long defunct, its influence lives on through ExecNet’s preserved history and continued presence.