Kordia is a New Zealand state-owned enterprise. It provides a range of services, including connectivity, cloud and cyber security services, as well as managed IT, field services, broadcast and safety of life communications.

Kordia owns and operates a network in New Zealand, which is based primarily on digital microwave technology. The company also has access to a number of fibre networks running between Auckland, Wellington and Christchurch. Part of Kordia's 65-year heritage is the nationwide network of transmission towers that was built by the company in its various iterations, including: NZBC, Television New Zealand, BCL and now Kordia. In 2007, Kordia upgraded its high sites to build the digital terrestrial television (DTT) platform, which now hosts Freeview (Free-to-air digital television in New Zealand).

In recent years, Kordia has made several acquisitions in the cyber security, cloud and managed IT space.

The New Zealand business was formed as a subsidiary of Television New Zealand Ltd (TVNZ) on 1 July 1989 as Broadcast Communications Ltd (BCL).

In 2003 TVNZ underwent a wide restructure from a State Owned Enterprise (SOE) to a Crown Entity with a dual commercial-(public service) charter remit, with the passing of the Television New Zealand Act 2003. BCL was split from TVNZ into a separate business entity. The new entity was named Transmission Holdings Limited (THL, THL Group), with the New Zealand broadcasting business continuing to operate under the name BCL, and was, and continues to be structured as an SOE.[1] THL took with it a significant proportion of TVNZ's debt with it, leaving the newly restructured TVNZ debt free. This high level of initial debt has impeded the business's operating performance in the early years of its inception.

In November 2006, the business, Transmission Holdings Limited Group (BCL, THLA, AAPCS) was rebranded to Kordia. The name "Kordia" is derived from the Latin word "accordia", meaning "harmony".^{[citation needed]}

In June 2007 Kordia purchased telecommunications company and internet service provider (ISP) Orcon Limited for $27 million. In 2008 Kordia led Orcon's launch of the country's first local loop unbundled telephone and broadband services, with Orcon becoming the first New Zealand ISP to offer ADSL2+ broadband access. In April 2013 Kordia sold Orcon for an undisclosed sum to Vivid Networks, a consortium of businesspeople directed by Warren John Hurst. Less than a year later, John Hurst was facing bankruptcy and Orcon was sold to competitor Callplus in June 2014 for an undisclosed sum that was forecasted to be around $30 million.

In 1993, the company then known as BCL opened a Maritime Operations Centre (MOC), which provides safety of life at seas communications on behalf of Maritime NZ. Kordia continues to provide this service from the MOC based in Wellington. Today, Kordia's maritime operations is responsible for ‘NAVAREA XIV’ – an area of 50 million square kilometres, or nearly a quarter of the world's oceans. Kordia built, and now operates and maintains HF and VHF radio networks for maritime communications.