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CIX

CIX is a trading name of ICUK Computing Services Ltd (CH 04319375), a Croydon-based ISP since 2001 providing broadband, VoIP and hosting with award-winning UK support.

★★★★☆ 4.2 / 5
60+ reviews on Trustpilot Last verified: 2026-04-17
View on Trustpilot →

About CIX

This profile is built from our broadband market dataset and the sources linked on this page. We do not repeat unchecked marketing claims; numbers and dates match fields on file or linked evidence.

CIX (originally Compulink Information eXchange, founded 1987) is now a trading name of ICUK Computing Services Ltd (CH 04319375), one of the UK's oldest internet service providers. ICUK, founded November 2001 in Croydon by Leslie Costar and Paul Barnett (a former CIX employee), acquired CIX Online Ltd on 25 May 2011 and continues to operate both brands. CIX provides conferencing, broadband (ADSL, FTTC, FTTP up to 220/30Mbps), VoIP telephony, web hosting, dedicated servers, and domain registration. The combined business remains privately owned, debt-free and profitable, serving 850+ resellers in addition to direct retail customers. Long-standing customer reviews on ISPreview praise UK-based Croydon support with emails answered in minutes and telephone calls answered in seconds. Comms Business awards finalist 2015 for ISP of the Year and Best Wholesale Service Provider. Customer base includes CBI, Arts Council, British Gas, 118118.com, and NHS.

Key details

Year founded1987 (CIX original); 2001 (ICUK); 2011 (ICUK acquired CIX)
ADR schemeCommunications Ombudsman
Parent companyICUK Computing Services Ltd (acquired CIX Online Ltd 25 May 2011)
Legal name ICUK COMPUTING SERVICES LTD (trading as CIX) Companies House 04319375 →

Check availability in your area

This provider is not yet in our postcode comparison tool. Visit cix.co.uk to check availability directly.

What stands out

  • Full fibre (FTTP) gigabit broadband
  • Business-focused telecoms provider

Recognition

  • Comms Business 2015 ISP of the Year [Finalist]
  • Comms Business 2015 Best Wholesale Service Provider [Finalist]
  • Croydon Business Awards 2015/2016 Tech Innovation of the Year

Technologies on file

These labels come from our directory data for this provider. Short explanations below describe the technology terms in general; they are not a statement about availability at your address.

  • FTTP Full fibre to your door. Fastest and most reliable.
  • FTTC Fibre to the street cabinet, copper to your home. Widely available.

Coverage

UK

CIX is not yet in our postcode comparison tool. Check availability on their website, or see which providers we can compare at your postcode.

If something goes wrong

Here is where CIX sits within the UK consumer protection framework.

Regulator
Ofcom. Sets the General Conditions that CIX must follow.
Complaints
Communications Ombudsman. The Communications Ombudsman is a free, Ofcom-approved dispute resolution scheme. After eight weeks with an unresolved complaint, you can escalate for an independent decision.
Security
Cyber Essentials: Yes (typical for B2B telecoms)

Questions and answers

Straight answers from our directory fields for CIX. If you need live pricing or availability, use the postcode tool or the provider link above.

Where can I verify CIX's Companies House registration?
Companies House lists ICUK COMPUTING SERVICES LTD (trading as CIX) under company number 04319375. Open the official record using the Companies House link on this page.
What Trustpilot figures does this directory show for CIX?
Our directory captured Trustpilot as 4.2 out of 5 with 60 reviews. Snapshot date in our directory: 2026-04-17. Trustpilot updates live; use the Trustpilot link on this page for the current score.
What coverage note is on file for CIX?
Our dataset records: UK
Is CIX in the BroadbandSwitch postcode comparison tool?
No. This provider is not currently among those we return in the postcode comparison tool. You can still compare other providers we list.
What does verification status mean on this profile?
This profile's verification status in our directory is recorded as: verified. That reflects our internal checks against the sources linked on this page, not a government endorsement.
Does this directory flag CIX as Ofcom-registered?
Yes. We record this provider as Ofcom-registered (General Conditions of entitlement). For complaints or disputes, follow the dispute route and Ofcom guidance that apply to your situation.
Which dispute resolution scheme does this directory list for CIX?
Communications Ombudsman. The Communications Ombudsman is a free, Ofcom-approved dispute resolution scheme. After eight weeks with an unresolved complaint, you can escalate for an independent decision.
What is the BroadbandSwitch verification score?
It is an internal score from 1 to 10 based on how thoroughly we have checked Companies House, regulator and trade-body fields, and independent review data where available. It is not a measure of customer satisfaction.