Ofcom data · 301 postcodes

DL4 broadband coverage — County Durham

Full-fibre, gigabit and superfast broadband availability across the DL4 postcode district, plus business broadband and leased-line options for County Durham.

Strong coverage

Superfast (30Mb+)

95.6%

Ultrafast (300Mb+)

65.5%

Gigabit-capable

65.5%

Below USO (10Mb)

Check broadband at your exact DL4 postcode

District figures are an average — get the precise availability, full-fibre status and mobile signal for your address.

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Broadband in DL4

Broadband availability in the DL4 postcode district (County Durham) is Strong — superfast is near-universal and gigabit is rolling out. Across the 301 postcodes Ofcom measures in DL4, superfast broadband (30 Mbit/s or faster) reaches 95.6% of premises and gigabit-capable lines are available to 65.5%.

Around 0% of premises in DL4 fall below the Universal Service Obligation (a minimum of 10 Mbit/s download and 1 Mbit/s upload), so the overwhelming majority of homes and businesses here can already order a decent fixed line. For a business that depends on its connection, the figures that matter most are gigabit and full-fibre availability — the symmetric, low-contention services we quote leased lines and FTTP against.

Sample postcodes in DL4

Postcode	Superfast	Gigabit
DL4 1AA	100%	100%
DL4 1AD	100%	0%
DL4 1AF	100%	0%
DL4 1AG	100%	0%
DL4 1AH	100%	65%
DL4 1AJ	100%	0%
DL4 1AL	100%	0%
DL4 1AN	100%	88.9%
DL4 1AP	100%	0%
DL4 1AQ	100%	100%

Business broadband & leased lines in County Durham

Whether the DL4 district has full fibre yet or not, we can connect your business. Where FTTP and gigabit are live we quote ultrafast full-fibre; where they aren't, a leased line still delivers guaranteed, symmetric speeds with an SLA. We also handle mobile coverage and VoIP for the same site.

Get a business broadband quote for DL4

Free, no obligation — full fibre, leased line or FTTC, matched to what's actually available at your postcode.

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Nearby DL districts

DL1 — 89% gigabit DL14 — 42.3% gigabit DL8 — 46.3% gigabit DL3 — 92.6% gigabit DL13 — 15% gigabit DL10 — 51.4% gigabit DL2 — 43.3% gigabit DL5 — 6.5% gigabit DL12 — 45.2% gigabit DL15 — 72.5% gigabit

See all Darlington (DL) broadband coverage ›

Frequently asked questions

What broadband speeds are available in the DL4 area (County Durham)?

In the DL4 area (County Durham), superfast broadband (30 Mbit/s+) is available to approximately 95.6% of premises and gigabit-capable broadband to around 65.5%, based on Ofcom Connected Nations data. Exact availability varies by postcode — enter your full postcode in our checker for a precise result.

Can I get full-fibre or gigabit broadband in the DL4 area (County Durham)?

Gigabit-capable coverage in the DL4 area (County Durham) stands at about 65.5% of premises. Where gigabit and full-fibre (FTTP) are live, businesses can order symmetric, low-latency connections — ideal for cloud, VoIP and multi-site working. If full fibre hasn't reached your premises yet, a leased line can still deliver guaranteed gigabit speeds.

How do I check broadband at my exact address in the DL4 area (County Durham)?

Use the free broadband postcode checker on this page: enter your postcode to see fixed-broadband availability, gigabit/full-fibre coverage and mobile signal for all four networks at that location, sourced from official Ofcom data.

Who provides business broadband in the DL4 area (County Durham)?

Most UK providers serve the DL4 area (County Durham) over the Openreach and (where present) CityFibre or Virgin Media networks. Connection Technologies arranges business broadband, full-fibre (FTTP) and leased lines across the area — request a quote to compare options for your postcode.

Broadband availability data © 2026 Ofcom (Connected Nations), licensed under the Open Government Licence v3.0. Figures are area averages and predictions; availability at an individual address may differ — always confirm with a postcode-level check.