BT51 broadband and area guide
Ofcom coverage, connection speeds, house prices and local data for 799 postcodes across 3 sectors in Causeway Coast and Glens.
Full fibre
0%
Gigabit
85%
Superfast
97%
Postcodes
799
Causeway Coast and Glens' BT51 spans 799 postcodes with a notably higher superfast-only share (11.7%) and 1.6% below 10 Mbps. It's a more mixed picture than central Causeway codes.
Broadband speeds in BT51
Share of BT51 premises by the fastest download speed available, averaged across all 799 postcodes in the district.
Gigabit reaches 85.2% of BT51 postcodes in Causeway Coast and Glens. The 11.7% in the 30 to 300 Mbps superfast band is notably high, exceeding the UK average download speed of around 75 Mbps, and the second-highest superfast-only share on this run. Below-10Mbps postcodes account for 1.6%, and 0.8% miss the universal service obligation floor. BT51's 799 postcodes suggest it encompasses both connected urban patches and less-developed rural zones. Cable networks deliver most gigabit service. Infrastructure investment appears concentrated in town centres, leaving dispersed areas with superfast-only access. The postcode's higher superfast-only rate reflects geographic or settlement patterns within Causeway Coast and Glens.
Source: Ofcom Connected Nations. Percentages are district-wide averages of postcode-level availability, so rows may not sum to exactly 100%.
Connectivity in detail
Below 10 Mbps USO
<1%
Premises unable to get the 10 Mbps universal service minimum
Fixed wireless
0%
Premises that can use a fixed wireless access service
Broadband by sector
BT51 splits into 3 postcode sectors. Coverage and prices can differ street by street, so open a sector below to find your exact postcode.
| Sector | Postcodes | Superfast | Full fibre | Gigabit |
|---|---|---|---|---|
| BT51 3 | 253 | 99% | 0% | 93% |
| BT51 4 | 262 | 96% | 0% | 80% |
| BT51 5 | 284 | 95% | 0% | 83% |
All BT51 3 postcodes (253)
All BT51 4 postcodes (262)
All BT51 5 postcodes (284)
Best deals
Compare broadband deals in BT51
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Living in Causeway Coast and Glens
BT51 trades gigabit reach for a wider range of superfast-only premises. Budget-conscious movers might find value here, but those dependent on gigabit should confirm their specific address.
Remote worker score
53/100
Connectivity and amenities for home working
Family score
50/100
Schools, safety and family amenities
Value score
50/100
What you get for the local price level
BT51 broadband FAQs
Why does BT51 have so many superfast-only postcodes?
BT51's 799 postcodes span both well-served town centres and more dispersed rural areas. Older or lighter infrastructure in the latter drives up the superfast-only share.
What should I expect for broadband in BT51's less-connected postcodes?
Most will access 30-300 Mbps superfast. Only 1.6% fall below 10 Mbps, so truly slow speeds are rare despite the higher superfast-only fraction.
Is BT51 a riskier postcode for broadband planning?
The 15% non-gigabit rate is notably higher than many peers. Run an address check with your provider before moving, particularly if you're targeting a presumed rural area.
Would BT51 suit someone working remotely but not requiring gigabit?
Yes. The postcode's 85% gigabit and 12% superfast together cover 97% of postcodes. Household broadband demands are nearly always met.
Neighbouring districts
Check your exact postcode
Every postcode in BT51 has its own page with broadband speeds, house prices, school ratings and crime stats. You can also compare providers for your address.
Data sources: Broadband data from Ofcom Connected Nations 2025 · House prices from HM Land Registry · Crime from Police.uk · See all data sources