CF POSTCODE AREA · 6 DISTRICTS SAMPLED
Cardiff mobile coverage All four at 100/100 in all 6 districts sampled CF postcode area
No network wins Cardiff on overall coverage: all four score 100/100.
Cardiff as a whole
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EE
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O2
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Three
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Vodafone
Ofcom Mobile Coverage data (May 2025), measured across 726 addresses in 34 sampled postcodes, pooled from 6 districts. Methodology.
What differs inside Cardiff
Nothing, on Ofcom's figures: across all 6 districts sampled, no network differs by 8 points or more from one district to the next, indoors or outdoors.
District by district
| District | Places | Indoor, low to high | Addresses |
|---|---|---|---|
| CF3 | Rudry, Rumney, Llanrumney | 100% on all four | 132 |
| CF5 | Radyr, Caerau, Canton | 100% on all four | 118 |
| CF10 | Splott, Cathays, Butetown | 100% on all four | 105 |
| CF11 | Canton, Butetown, Llandaff | 100% on all four | 155 |
| CF14 | Heath, Rudry, Cathays | 100% on all four | 146 |
| CF15 | Radyr, Pentyrch, Tongwynlais | O2 93%; the rest 100% | 70 |
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1pMobile runs on EE's network: £5 a month for 5GB (read 19 October 2026). A price, not a coverage ranking: Ofcom separates no network here.
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