CF81 broadband and area guide
Ofcom coverage, connection speeds, house prices and local data for 384 postcodes across 2 sectors in Caerphilly.
Full fibre
0%
Gigabit
75%
Superfast
99%
Postcodes
384
CF81 delivers consistently fast broadband to 384 postcodes across Caerphilly, with gigabit available to three-quarters. The district has no below-USO postcodes.
Broadband speeds in CF81
Share of CF81 premises by the fastest download speed available, averaged across all 384 postcodes in the district.
Three-quarters of CF81 postcodes support gigabit speeds, while superfast broadband is near-universal at 98.5%. The speed tier distribution is clean: 75.2% exceed 300 Mbps, 23.4% occupy the 30 to 300 band, and only 0.3% fall below 10 Mbps. Zero postcodes sit below USO thresholds, indicating complete coverage from the infrastructure floor. Wireless presence is negligible at 0.1%. This is one of Caerphilly's strongest districts, with cable or modern fibre reaching almost every corner. The lack of need for wireless services suggests wireline networks dominate completely.
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
0%
Premises unable to get the 10 Mbps universal service minimum
Fixed wireless
<1%
Premises that can use a fixed wireless access service
Broadband by sector
CF81 splits into 2 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 |
|---|---|---|---|---|
| CF81 8 | 174 | 100% | 0% | 85% |
| CF81 9 | 210 | 98% | 0% | 67% |
All CF81 8 postcodes (174)
All CF81 9 postcodes (210)
Best deals
Compare broadband deals in CF81
Deals are priced per address. Enter your full postcode to see every package available where you live.
Free comparison. Opens our deals partner in a new tab.
Living in Caerphilly
Households can choose service based on preference rather than desperation. The 23% on mid-speed plans either prefer the lower cost or genuinely don't need gigabit for their use case. No digital divide here.
Remote worker score
55/100
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
CF81 broadband FAQs
Is CF81 one of Caerphilly's best-connected areas?
It sits high within the local district comparison. 75% gigabit availability and zero below-USO postcodes mark it as well-served, though Caerphilly's other codes vary in gigabit penetration.
What's the practical speed difference between gigabit and the 30 to 300 tier?
Real-world speeds in the gigabit tier often exceed 100 Mbps downloads, while the 30 to 300 band covers speeds that could be anywhere from 40 to 200 Mbps. Your actual speed depends on your plan, not just network availability.
Why is there almost no wireless here?
When cable and fibre networks are full, wireless services become unnecessary supplementary infrastructure. CF81's wireline footprint is dense enough that wireless doesn't need to fill gaps.
Are there any postcodes I should worry about?
Only 0.3% fall below 10 Mbps, so odds are overwhelming your address is well-served. If it isn't, a single check request is worth making.
Neighbouring districts
Check your exact postcode
Every postcode in CF81 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