Internex Online, usually known as io.org, was the first consumer dial-up ISP in Canada, formed by the merger of r-node and zooid BBS, two Bulletin board and Usenet/uucp systems, in early 1993. At its peak, it had about 10,000 customers, and was credited for leading in low cost access.

In November 1995 Internex was bought by Greenlight Communications, and six months later Greenlight sold it, along with most of Greenlight's assets, to ACC Telenterprises, where it was quickly absorbed into their general pool of internet subscribers.

Aside from its grass-roots and hackish beginnings, Internex Online was notable for an early commitment to provide free services (free access was available during non peak times), as well as an involved community.

Internex Online was the first home of iComm, a community initiative providing internet services to charitable and non-profit organizations.

• A Brief history of Internex Online by one of its founders
• Greenlight Communications Inc. Acquires Internex On Line Inc. Archived 2012-10-12 at the Wayback Machine
• Greenlight Communications to Support ACC Telenterprises in Providing Internet Services to Ontario Colleges Archived 2012-10-12 at the Wayback Machine
• Greenlight Communications Inc. Sells Internet Canada Corporation to ACC TelEnterprises Ltd.^{[dead link]}
• Internex telnet login screen