Hull's bid to renew its licence in 1914 was made conditional on the £192,000 purchase of the National Telephone Company infrastructure in the city.

[4] In the early part of the new millennium, the company started to pioneer services such as ADSL, Video on Demand and Digital TV.

[9][10] KCOM provides ADSL, VDSL and fibre to the home (FTTH) broadband internet and telephone service in Hull and surrounding areas.

KCOM formerly provided these services under the Karoo and later KC brands, until it adopted the group name across its entire business in 2016.

In September 2011, the company began a six-month trial of a 100 Mbit/s service in the East Riding of Yorkshire village of Woodmansey.

Due to delivery being FTTH greater speeds are a formality and fuelled by market expectation and not network restriction.

[18] In August 2007 the alleged-monopoly of KC was referred to the European Commission by Diana Wallis, MEP for Yorkshire and Humber area.

The main reason cited by rivals for not providing services in the Hull area was rather one of overall cost-effectiveness, given the relatively small number of potential customers (190,000 homes), and the fact that many of these would be likely to remain with the incumbent supplier.

[21] In July 2009, Nexus Telecoms signed an agreement with KC enabling them to offer effective wholesale line rental and call tariffs to business consumers within the Hull area so giving them a choice of service provider.

In September and October 2023, KCOM were embroiled in controversy when rivals started to erect wooden telegraph poles to carry their services into residential neighbourhoods, causing residents' protests.

Rival MS3 Networks commented that KCOM had historically failed to respond in a timely manner to requests to share their existing underground infrastructure.

From 2014 to 2019 KCOM also held the naming rights to Craven Park, where the Hull Kingston Rovers rugby league team play their games.