CityFibre broadband checker
CityFibre broadband checker for availability and partner ISPs
CityFibre builds and operates the full-fibre access network but does not sell residential broadband directly. Check the exact address, then choose a retail ISP and use the fault-boundary steps below if speed, installation or Wi-Fi causes problems.
Full-fibre network guide
Address-level check first
Which broadband providers can use CityFibre at this address?
The retail ISP controls your package, router, billing and frontline support. CityFibre availability is address-specific, and the list of retail providers can vary by property.
CityFibre broadband checker
Start with address-level CityFibre availability, then compare the retail ISPs actually offered for that property. If you already have service, diagnose the ONT, Ethernet handoff, ISP router and Wi-Fi as separate layers.
- Check the exact property: street build activity does not guarantee the address is ready to order.
- Choose the retail ISP: CityFibre is the access network; your ISP supplies the broadband contract and normally the router and support.
- Test the fault boundary: record ONT state and a direct wired result before treating poor Wi-Fi as a fibre-network fault.
Know the fault boundary
CityFibre network versus your broadband provider
CityFibre uses a wholesale model. The fibre infrastructure and the retail broadband service are separate, so the right support route depends on which layer is failing.
CityFibre
Builds and maintains the physical full-fibre access network.
Your chosen ISP
Sells the package, bills you and normally provides the router and customer support.
Your equipment
Wi-Fi, Ethernet, mesh placement and client devices can still limit a fast fibre service.
How to read a CityFibre availability result
The official address checker is the best source for whether a property is currently orderable and which providers can sell service there.
- Available now: review the retail providers shown for the exact address; package options can differ between them.
- Built nearby but unavailable: construction can finish before network activation, testing or provider onboarding is complete.
- Flat or apartment: building access, internal routing and wayleave permissions can make one block or unit differ from another.
- Neighbour can order: do not assume your property shares the same final route or address record; verify the individual premise.
Use the LinkSpeed Broadband Availability Checker for local context, then verify the exact property on the official CityFibre checker before ordering.
Compare CityFibre partner ISPs, not CityFibre packages
Once the address is live, compare the retail providers shown by the checker. The underlying fibre may be the same while the service around it can differ.
| Compare | Why it matters | What to check |
|---|---|---|
| Package speed and upload | Retail tiers can vary by ISP and address. | Compare both download and upload, not just the headline tier. |
| Router and Wi-Fi | The ISP normally supplies and supports the router. | Check Wi-Fi standard, mesh options, LAN port speeds and ownership/return terms. |
| Contract and price | Billing and minimum term sit with the retail ISP. | Compare total contract cost, scheduled price changes and exit terms. |
| Support and routing | The ISP is the first line for service faults. | Compare support routes and test latency/packet loss if speed alone looks fine. |
CityFibre installation, ducts, poles and building access
The final connection route depends on the property. CityFibre says most home connections use an underground shallow duct, while some addresses are served overhead.
- Confirm the proposed route: ask the chosen ISP whether the address is expected to connect underground or overhead.
- Flats and shared buildings: shared areas can require permissions and an approved route before the unit becomes orderable.
- Do not confuse street works with a live service: visible ducting, poles or fibre work can precede final activation.
- Keep installation questions with the ISP: the chosen provider normally arranges the appointment and liaises with CityFibre where network work is needed.
CityFibre ONT, Ethernet and router fault isolation
A full-fibre connection normally hands off from an optical network terminal to the retail ISP router over Ethernet. Treat each stage separately.
- ONT power and optical state: photograph the lights before rebooting anything. A clear optical alarm is different from a Wi-Fi problem.
- ONT-to-router Ethernet: reseat or replace the Ethernet lead and check the correct WAN port if the optical state looks healthy but the router is offline.
- Router versus line: test one capable device by Ethernet from the main router before judging the fibre service from another room.
- Multi-gig packages: a 1Gbps LAN port, switch, dock or network adapter can cap the result even when the access network is faster.
Build useful CityFibre service evidence before reporting a fault
A short controlled test set helps the retail ISP decide whether the issue is the home network, its router/service layer or the CityFibre access path.
- Photograph or note the ONT light state and whether the ISP router shows a working WAN connection.
- Run one direct Ethernet speed test from the main router with other heavy traffic paused.
- Compare the wired result with same-room Wi-Fi and the problem room to isolate wireless coverage.
- Run the LinkSpeed Bufferbloat, Packet Loss and Loaded Latency tests if calls or gaming lag despite good download speed.
- Keep timestamps and the retail ISP case reference so a recurring access-network fault can be escalated with evidence.
CityFibre fault pattern table
| Symptom | Best next check | Likely layer |
|---|---|---|
| Street has fibre but address checker says unavailable | Use the official address checker and recheck later rather than assuming construction equals service readiness. | Build/activation or address availability |
| ONT optical alarm or no usable optical state | Record the ONT lights and report the service fault to the retail ISP so it can escalate network engineering if required. | Fibre/ONT/access network |
| ONT looks healthy but router has no internet | Reseat the ONT-to-router Ethernet lead, confirm the WAN port and restart the router once. | Ethernet handoff or ISP/router |
| Ethernet is fast but one room is slow | Use the Wi-Fi isolation guide. | Home Wi-Fi |
| Speed is good but calls or games lag | Run the Loaded Latency Test and Packet Loss Test. | Queueing, routing or packet loss |
Escalate to the right company
Who should you contact for a CityFibre problem?
For an active broadband service, CityFibre directs customers to their retail broadband provider for installation, billing, speed and service faults. The ISP can then involve CityFibre if network engineering is required.
Contact the retail ISP first
Use your broadband provider for an active-service fault, billing, package questions, installation changes and router support. Keep your test evidence and account reference ready.
Open provider guides →CityFibre network/build help
Use CityFibre help for general network-build information, availability guidance and issues relating to its physical network or street works.
Open official network help ↗Before changing provider
Keep the network and retail layers separate
A router or billing issue can follow the ISP even when the underlying fibre is healthy; a physical fibre fault may need the ISP to escalate to the network operator.
Build evidence for the retail ISP
Keep ONT state, direct Ethernet results, timestamps and the ISP case reference together.
Review test evidence ↓Check another ISP or network route
Compare package terms, router hardware and alternative full-fibre networks at the same address before switching.
Compare provider guides →Switching on or away from the CityFibre network
A CityFibre address may offer several retail ISPs, so changing provider does not always mean changing the physical access network.
- Recheck the address: provider choice can change as new retailers become available on the local CityFibre footprint.
- Compare the whole service: router, upload, contract, support and core-network routing can differ even on the same fibre.
- Check switching notices: confirm minimum-term charges, activation timing and any phone or bundled services before placing the order.
- Do not replace good fibre to fix Wi-Fi: if Ethernet is strong and only rooms are weak, fix the home network first.
Focused answers
CityFibre Broadband FAQs
These answers separate network availability, retail service and home-network faults.
Does CityFibre sell broadband directly?
No. CityFibre builds and operates the full-fibre network and works with retail broadband providers that sell the service to customers.
Why can CityFibre be in my street but unavailable at my address?
Street construction can finish before activation, testing, provider onboarding or the final property route is ready. Flats, wayleaves and address records can also affect individual availability.
Who do I contact if my CityFibre broadband is down?
Contact the retail broadband provider you pay. The provider should diagnose the service and escalate to CityFibre if the access network needs engineering work.
Can two CityFibre providers offer different packages at the same address?
Yes. Retail providers can offer different speed tiers, routers, contract terms, prices and support even when they use the same CityFibre access network.
Should I switch provider if CityFibre Ethernet speed is good but Wi-Fi is poor?
Not necessarily. A good wired result points toward router placement, mesh backhaul, wireless interference or device capability rather than the fibre access line.