Ofcom data · 444 postcodes

CM11 broadband coverage — Basildon

Full-fibre, gigabit and superfast broadband availability across the CM11 postcode district, plus business broadband and leased-line options for Basildon.

Excellent coverage

Superfast (30Mb+)

94.3%

Ultrafast (300Mb+)

81.4%

Gigabit-capable

81.4%

Below USO (10Mb)

0.1%

Check broadband at your exact CM11 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 CM11

Broadband availability in the CM11 postcode district (Basildon) is Excellent — gigabit-capable full fibre is widely available. Across the 444 postcodes Ofcom measures in CM11, superfast broadband (30 Mbit/s or faster) reaches 94.3% of premises and gigabit-capable lines are available to 81.4%.

Around 0.1% of premises in CM11 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 CM11

Postcode	Superfast	Gigabit
CM11 1AA	100%	95.5%
CM11 1AB	100%	76.9%
CM11 1AE	100%	76.2%
CM11 1AF	100%	100%
CM11 1AG	100%	100%
CM11 1AH	100%	100%
CM11 1AJ	100%	0%
CM11 1AL	100%	100%
CM11 1AN	100%	100%
CM11 1AP	100%	100%

Business broadband & leased lines in Basildon

Whether the CM11 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 CM11

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

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Nearby CM districts

CM3 — 63.5% gigabit CM1 — 79.8% gigabit CM2 — 85.4% gigabit CM7 — 86.8% gigabit CM23 — 72.2% gigabit CM9 — 81.8% gigabit CM6 — 79% gigabit CM8 — 79.9% gigabit CM13 — 77.3% gigabit CM16 — 79.9% gigabit

See all Chelmsford (CM) broadband coverage ›

Frequently asked questions

What broadband speeds are available in the CM11 area (Basildon)?

In the CM11 area (Basildon), superfast broadband (30 Mbit/s+) is available to approximately 94.3% of premises and gigabit-capable broadband to around 81.4%, 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 CM11 area (Basildon)?

Gigabit-capable coverage in the CM11 area (Basildon) stands at about 81.4% 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 CM11 area (Basildon)?

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 CM11 area (Basildon)?

Most UK providers serve the CM11 area (Basildon) 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.