UK AltNet profile
CityFibre
CityFibre operates in Nationwide UK (80+ towns and cities) on XGS-PON full fibre (Headline numbers table). CityFibre is the UK's largest independent wholesale full-fibre network operator, supplying retail ISPs across more than 80 UK towns and cities.
CityFibre is the UK's largest independent wholesale full-fibre network operator, supplying retail ISPs across more than 80 UK towns and cities.
What changed: Added answer capsule, key-facts block, question-led headings, speed and premises sections, consumer access guidance, cross-links to cities and compares, and attributed Headline numbers callout for AI citation, 3 June 2026.
Provider directory
For coverage, type, employee estimates and a BroadbandSwitch.uk link for this provider, see the UK provider directory table (613 providers).
Key facts
- Region of focus: Nationwide UK (80+ towns and cities) (Headline numbers table).
- Network tech: XGS-PON full fibre (Headline numbers table).
- Premises passed: Approx 4.6 million UK premises passed (Q3 2025) (Headline numbers table).
- Premises ready for service: Approx 4.3 million ready for service (Q3 2025) (Headline numbers table).
- Customers (latest): ~730,000 wholesale customer connections at Q3 2025 (108,000 net adds in Q3 alone) (Headline numbers table).
What are CityFibre's headline numbers?
| Founded | 2011 |
|---|---|
| HQ | London |
| Region of focus | Nationwide UK (80+ towns and cities) |
| Premises passed | Approx 4.6 million UK premises passed (Q3 2025) |
| Premises ready for service | Approx 4.3 million ready for service (Q3 2025) |
| Customers (latest) | ~730,000 wholesale customer connections at Q3 2025 (108,000 net adds in Q3 alone) |
| Take-up rate | Wholesale; varies by city and ISP partner |
| Network tech | XGS-PON full fibre |
| Funding raised | Over £8 billion in cumulative equity and debt (July 2025 £2.3bn package) |
| Last funding round | July 2025 financing (£500m equity, £960m debt expansion, £800m accordion) (July 2025) |
| INCA member | Yes |
| Last updated | 3 June 2026 |
How fast is CityFibre?
CityFibre uses XGS-PON full fibre (Headline numbers table). Retail speed tiers depend on the operator's published tariffs and postcode availability.
How many premises has CityFibre passed?
This profile lists premises passed as Approx 4.6 million UK premises passed (Q3 2025) and premises ready for service as Approx 4.3 million ready for service (Q3 2025) (Headline numbers table).
Who is CityFibre?
CityFibre is the UK's largest independent wholesale full-fibre operator, backed by Goldman Sachs, Antin Infrastructure Partners and Mubadala. The network is XGS-PON, supports gigabit and multi-gigabit retail tariffs, and is built on the open-access principle: any retail ISP can use CityFibre's wholesale infrastructure to deliver consumer services. Anchor retail tenancy is held by Vodafone, with Sky, TalkTalk, Zen Internet, Three Broadband and a growing list of smaller ISPs also live on the network. CityFibre is a regular participant in BDUK and other public-sector programmes, and is widely regarded as the strategic counterweight to Openreach in the UK wholesale full-fibre market.
Where does CityFibre operate?
Live in 80+ UK towns and cities, with Edinburgh, Leeds, Manchester, Coventry, Doncaster, Peterborough, Aberdeen and Stoke among the most-built footprints. Build cadence has been accelerated through the past three years.
Which areas is CityFibre building in?
Edinburgh, Leeds, Manchester, Coventry, Doncaster, Peterborough, Aberdeen, Stoke, Cambridge, Stirling, Huddersfield, plus 70+ further towns and cities.
What partnership routes does CityFibre offer?
Retail ISPs can join the CityFibre open-access platform; consumer brands can reach CityFibre-footprint customers via the FBRE network. Co-marketing opportunities exist around CityFibre-city launches.
FBRE supports AltNets with geo-targeted tenancy, comparison site builds for resellers, and co-marketing collaborations. Network reach is verified at 12,000,000+ impressions and 730,000+ network clicks in the 12 months to 24 May 2026 (rolling average of 2,000+ clicks per day, rising fast). See AltNet marketing for placement and pricing.
How do I get CityFibre?
CityFibre is a wholesale or infrastructure operator and does not sell broadband directly to most households. Check whether a retail ISP partner serves your postcode (About CityFibre section; Coverage notes).
How does FBRE reach CityFibre-footprint switchers?
- Geo-targeted tenancy on the FBRE network, single site from £99 per month.
- Postcode checker build that surfaces CityFibre where available, from £4,500.
- Co-marketing on the FBRE AltNet Tracker.
- Comparison engine build for partner resellers, from £7,950.
Where is CityFibre covered in our research?
FBRE comparison pages featuring CityFibre:
CityFibre is named on these city pages (sample):
- Broadband in Aberdeen
- Broadband in Bradford
- Broadband in Bristol
- Broadband in Cambridge
- Broadband in Coventry
- Broadband in Doncaster
- Broadband in Dundee
- Broadband in Edinburgh
See also UK broadband by city for the full city index.
Where does this CityFibre profile data come from?
This profile uses INCA member published data where available, the operator's published trading updates and press releases, Ofcom Connected Nations data, and Companies House filings. Figures marked "data pending" reflect commercially confidential or not-yet-published numbers. See methodology for sourcing detail.