BT Fibre Checker for Business: Check Your Availability
The BT fibre checker lets you see which broadband speeds are available at your business address via the Openreach network. This guide explains how to use it, what the results mean, and why checking across multiple networks — not just BT — gives you the full picture of your connectivity options.
Sophie Moore
Operations Manager
Before committing to a business broadband or leased line contract, one of the first things you need to establish is what connectivity technology is actually available at your specific premises. BT's online availability checker is one of the most widely used tools for this purpose — but it only shows availability on the Openreach network, which means it does not tell you the complete story.
How the BT Fibre Checker Works
BT's availability checker (available at bt.com/business) works by querying the Openreach infrastructure database for your postcode or full address. It returns information about which broadband technologies are available, the estimated speed range for your specific line, and whether FTTP (full fibre to the premises) has been deployed.
The checker typically shows:
- Whether ADSL, FTTC or FTTP is available
- Estimated download and upload speed ranges for FTTC based on your distance from the street cabinet
- Whether FTTP (full fibre) is currently available or planned for your area
Understanding the Results
ADSL Available
If the checker only shows ADSL, your premises is not within range of a fibre street cabinet. ADSL delivers up to around 20Mbps download and 2Mbps upload, which is increasingly inadequate for modern business workloads. ADSL is primarily relevant now as an interim or failover technology. The checker result does not necessarily mean FTTC will never be available — cabinet upgrades continue in many areas.
FTTC Available
FTTC (fibre to the cabinet) is the most widely available fibre broadband technology in the UK. The speed shown in the checker is an estimate based on your line length from the cabinet — not a guarantee. Real-world speeds can vary. FTTC delivers between 40Mbps and 80Mbps download in most cases, with upload speeds of 8–20Mbps.
FTTP Available
If the checker shows FTTP availability, full fibre has been connected to your premises (or at least to your building). FTTP delivers symmetric or near-symmetric speeds with significantly better performance and reliability than FTTC. Business FTTP products from BT Business typically start at 150Mbps and reach 900Mbps on the Openreach network.
FTTP Coming Soon or Not Available
Where FTTP is shown as planned, Openreach has committed to building to your area within a stated timeframe. These timelines sometimes slip, so it is worth treating them as indicative rather than firm. If you need full fibre now and Openreach is not yet available, CityFibre or other altnet providers may have deployed infrastructure in your area independently.
The Limitation of Using the BT Checker Alone
The BT fibre checker only shows what is available on the Openreach network. It does not show:
- CityFibre coverage (which is independent of Openreach and available in many UK towns and cities)
- Virgin Media Business coverage
- Independent altnet providers (Hyperoptic, Community Fibre, Trooli and others)
- Leased line availability from any carrier
A business that checks the BT fibre checker and sees only FTTC available may actually have access to gigabit FTTP via CityFibre or another network at their specific address. Running an availability check across multiple networks simultaneously gives a much more complete picture.
How AMVIA Checks Availability
AMVIA runs availability checks across multiple carrier databases simultaneously, including Openreach, CityFibre, Virgin Media Business and a range of independent network providers. We also check leased line availability from a range of carriers in a single step. Rather than checking each network separately, you get a consolidated view of what is available at your address, along with pricing from each provider, in one request.
What to Do with Your Results
Once you know what is available at your address, the next step is matching the right technology to your actual requirements:
- 1–10 staff with general office workloads: FTTC or lower-tier FTTP is usually sufficient
- 10–30 staff or heavy cloud use: FTTP 300–500Mbps or bonded FTTC is appropriate
- 30+ staff or mission-critical connectivity: FTTP 900Mbps or a dedicated leased line
See Everything Available at Your Business Address
Our availability check covers BT Openreach, CityFibre, Virgin Media Business and leased line carriers — all in one step.
Frequently Asked Questions
The BT checker pulls data from the Openreach infrastructure database, which is generally accurate for availability. Speed estimates for FTTC are based on line length and are indicative — actual speeds may be higher or lower depending on line quality, in-building wiring and network conditions.
Openreach is not the only full fibre network in the UK. CityFibre has deployed FTTP independently in many towns and cities, and several other altnet providers have built local full fibre infrastructure. It is worth checking availability on these networks separately — AMVIA can do this in a single step across all major networks.
FTTC speed estimates are calculated from the length of the copper line between your premises and the street cabinet. Shorter copper runs achieve higher speeds. The range reflects uncertainty in line quality — your actual speed will be confirmed once the line is tested during installation.
No. The BT fibre checker shows broadband availability only. Leased line availability depends on a different set of infrastructure considerations and requires a separate survey process. AMVIA can run a leased line availability check for your postcode across multiple carrier networks.
It can. In some multi-tenanted buildings, the landlord controls the internal infrastructure and may have arrangements with specific carriers. The BT checker reflects what is available at the building level, but connecting an individual unit may require agreement with building management. AMVIA can help navigate this if relevant.
Related Reading
FTTP Checker: Can Your Business Get Full Fibre?
A guide to checking full fibre availability across all major UK networks, not just BT Openreach.
BT Business Broadband Review
An honest assessment of what BT Business Broadband offers and when alternatives may suit you better.
CityFibre for Business: Full Fibre Networks Explained
How CityFibre's independent full fibre network compares to BT Openreach for business broadband.