Ofcom data · 542 postcodes

BN18 broadband coverage — Arun

Full-fibre, gigabit and superfast broadband availability across the BN18 postcode district, plus business broadband and leased-line options for Arun.

Strong coverage

Superfast (30Mb+)

90.9%

Ultrafast (300Mb+)

52.4%

Gigabit-capable

51.4%

Below USO (10Mb)

0.9%

Check broadband at your exact BN18 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 BN18

Broadband availability in the BN18 postcode district (Arun) is Strong — superfast is near-universal and gigabit is rolling out. Across the 542 postcodes Ofcom measures in BN18, superfast broadband (30 Mbit/s or faster) reaches 90.9% of premises and gigabit-capable lines are available to 51.4%.

Around 0.9% of premises in BN18 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 BN18

Postcode	Superfast	Gigabit
BN18 0AA	92.3%	30.8%
BN18 0AB	100%	0%
BN18 0AD	0%	0%
BN18 0AE	100%	0%
BN18 0AF	100%	100%
BN18 0AG	0%	0%
BN18 0AH	100%	0%
BN18 0AJ	33.3%	0%
BN18 0AL	0%	0%
BN18 0AN	100%	0%

Business broadband & leased lines in Arun

Whether the BN18 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 BN18

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

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Nearby BN districts

BN2 — 82% gigabit BN1 — 78.2% gigabit BN3 — 74.6% gigabit BN27 — 51.6% gigabit BN11 — 96.8% gigabit BN16 — 39.1% gigabit BN21 — 82.4% gigabit BN25 — 71.3% gigabit BN22 — 83.8% gigabit BN13 — 93.6% gigabit

See all Brighton (BN) broadband coverage ›

Frequently asked questions

What broadband speeds are available in the BN18 area (Arun)?

In the BN18 area (Arun), superfast broadband (30 Mbit/s+) is available to approximately 90.9% of premises and gigabit-capable broadband to around 51.4%, 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 BN18 area (Arun)?

Gigabit-capable coverage in the BN18 area (Arun) stands at about 51.4% 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 BN18 area (Arun)?

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 BN18 area (Arun)?

Most UK providers serve the BN18 area (Arun) 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.