Mobile Coverage Check by Postcode
Enter any UK postcode to check mobile coverage in your area and compare signal across EE, O2, Vodafone and Three — built for businesses choosing or renewing SIMs.
This is designed for business SIM renewals, new connections, multi-site checks and teams that rely on reliable calls and data. If you need a deeper review — tariffs, contracts, multi-site advice — request a free business mobile audit as a next step.
Enter a UK postcode to compare likely business mobile coverage.
We compare the four major UK networks using available coverage data and present the result in a simple business-friendly format.
Want to see what the results look like first? View our sample coverage report or learn how our coverage checker works.
How do I check mobile coverage by postcode?
Enter your postcode in the checker above to see predicted EE, O2, Vodafone and Three signal for individual addresses in that area. Each network is scored for indoor and outdoor voice and data, so you can compare like-for-like before you choose or renew.
Because signal is decided locally, always check the exact postcode where your team actually works rather than relying on a national "best network" claim.
Why postcode matters
Mobile coverage is decided locally, not nationally. Mast distance, terrain, building materials and how far a signal has to travel indoors all change from one street — and even one property — to the next. A network that tops the national averages can still be the weakest option inside your specific office, so the only reliable way to compare is a postcode-level coverage check.
O2 vs Vodafone vs EE vs Three
Each of the four UK networks has areas of strength and weakness. Use these patterns as a starting point, then confirm against your own postcode.
| Network | General coverage pattern | Watch out for |
|---|---|---|
| O2 | Large overall footprint, solid in many towns | Patchier in some rural and semi-rural areas |
| Vodafone | Strong at specific sites where others are weaker | Varies more street-by-street than expected |
| EE | Broad urban/suburban 4G and widest 5G rollout | Indoor signal in modern glass buildings can dip |
| Three | Competitive urban data speeds and allowances | Thinner in rural and coastal areas |
National rankings do not predict local performance. See which network is best for business for a full side-by-side comparison.
Business premises considerations
Not sure where to start?
Try your main business postcode first, then repeat the check for any other sites or home-working addresses.
Check another postcodeHow the scoring works
Each address receives a score out of 16 for every network. The score is calculated from four metrics, each rated 0–4: indoor voice, outdoor voice, indoor data and outdoor data. A score of 16 means strong predicted performance across all four, while a lower score highlights areas of weakness.
When two or more networks share the same total score, a tie-break order is applied: O2, then Vodafone, then EE, then Three. This simply determines which network is listed as "best" when scores are equal — it does not mean one is objectively better than another at that address.
All data comes from Ofcom's Connected Nations reporting. Results reflect modelled predictions based on mast locations and terrain — real-world performance can still vary depending on your specific building and environment.
Why results can vary within one postcode
A single postcode can cover many different properties — offices, warehouses, shops and homes — each with different building materials, orientations and distances from the nearest mast. That is why this checker returns results for individual addresses rather than a single score for the whole postcode.
Two businesses on the same street can see different scores if one is in a modern steel-framed building and the other is in an older brick property. Read more about why business mobile coverage varies by location.
Why indoor data often lowers the total score
Of the four metrics, indoor data is typically the weakest. Voice calls need relatively little bandwidth and can tolerate weaker signal, but data — especially for video calls, cloud applications and large file transfers — needs a stronger, more stable connection.
Once a signal passes through walls, glazing and floors, data performance drops more noticeably than voice. For businesses where most work happens indoors, the indoor data score is often the most important number to compare across networks.
When to use the checker — and when to request an audit
The coverage checker is designed as a fast, self-service first step. It answers the question: how do the networks compare at this postcode? But for many businesses, coverage is only part of the decision.
Use the checker to compare networks at a specific postcode — it takes seconds and there is no limit on lookups.
Request an audit if you have multiple sites, complex usage or want help comparing tariffs and commercial fit alongside coverage.
The checker shows signal data; an audit adds contract review, usage analysis and a practical recommendation.
Want the full picture?
Our free business mobile audit reviews coverage at every location, compares costs across networks, and gives you a clear recommendation — no obligation.
Get a Business Mobile Audit