Ofcom data · 1,323 postcodes

PO21 broadband coverage — Arun

Full-fibre, gigabit and superfast broadband availability across the PO21 postcode district, plus business broadband and leased-line options for Arun.

Strong coverage

Superfast (30Mb+)

98.9%

Ultrafast (300Mb+)

55.5%

Gigabit-capable

55.5%

Below USO (10Mb)

Check broadband at your exact PO21 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 PO21

Broadband availability in the PO21 postcode district (Arun) is Strong — superfast is near-universal and gigabit is rolling out. Across the 1,323 postcodes Ofcom measures in PO21, superfast broadband (30 Mbit/s or faster) reaches 98.9% of premises and gigabit-capable lines are available to 55.5%.

Around 0% of premises in PO21 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 PO21

Postcode	Superfast	Gigabit
PO21 1AA	100%	100%
PO21 1AB	100%	100%
PO21 1AD	100%	100%
PO21 1AE	97.4%	97.4%
PO21 1AF	100%	57.1%
PO21 1AG	100%	100%
PO21 1AH	100%	100%
PO21 1AL	100%	100%
PO21 1AN	100%	100%
PO21 1AP	100%	100%

Business broadband & leased lines in Arun

Whether the PO21 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 PO21

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

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Nearby PO districts

PO20 — 51.8% gigabit PO7 — 79% gigabit PO19 — 73% gigabit PO9 — 87.5% gigabit PO30 — 67.2% gigabit PO12 — 92.2% gigabit PO16 — 89.1% gigabit PO22 — 59.7% gigabit PO33 — 78.5% gigabit PO14 — 90.4% gigabit

See all Portsmouth (PO) broadband coverage ›

Frequently asked questions

What broadband speeds are available in the PO21 area (Arun)?

In the PO21 area (Arun), superfast broadband (30 Mbit/s+) is available to approximately 98.9% of premises and gigabit-capable broadband to around 55.5%, 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 PO21 area (Arun)?

Gigabit-capable coverage in the PO21 area (Arun) stands at about 55.5% 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 PO21 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 PO21 area (Arun)?

Most UK providers serve the PO21 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.