St Albans mobile coverage Vodafone indoors runs from 71% to 100% by district AL postcode area
No network wins St Albans on overall coverage: all four score 100/100.
St Albans as a whole
Ofcom Mobile Coverage data (May 2025), measured across 909 addresses in 60 sampled postcodes, pooled from 10 districts. Methodology.
What differs inside St Albans
Where the networks split most
- AL2 Shenley, St Stephen, London Colney: indoors EE, O2 and Three 100%, Vodafone 71%.
- AL6 Welwyn, Codicote, Wheathampstead: indoors EE, O2 and Vodafone 100%, Three 80%.
- AL9 Hatfield, Essendon, North Mymms: indoors O2 100%, EE 90%.
Each network's weakest and strongest district
| Network | Indoor |
|---|---|
| EE | 90% in AL9 Hatfield; 100% in 7 districts |
| Three | 80% in AL6 Welwyn; 100% in 7 districts |
| Vodafone | 71% in AL2 Shenley; 100% in 7 districts |
Middle of the area against its edges
The 3 districts nearest the middle (AL4 Marshalswick, AL8 Hatfield, AL10 Hatfield) against the 3 furthest out (AL2 Shenley, AL5 Harpenden, AL6 Welwyn): no network differs by 8 points or more between them.
District by district
| District | Places | Indoor, low to high | Addresses |
|---|---|---|---|
| AL1 | Sopwell, Verulam, Clarence | 100% on all four | 156 |
| AL2 | Shenley, St Stephen, London Colney | Vodafone 71%; the rest 100% | 55 |
| AL3 | Harpenden, Redbourn, Sandridge | O2 83%; the rest 92% | 12 small sample |
| AL4 | Marshalswick, Kimpton, Sandridge | 100% on all four | 162 |
| AL5 | Harpenden, Wheathampstead, Hyde | EE 97%; the rest 100% | 140 |
| AL6 | Welwyn, Codicote, Wheathampstead | Three 80%; the rest 100% | 100 |
| AL7 | Hatfield, Haldens, Handside | 100% on all four | 63 |
| AL8 | Hatfield, Handside, Peartree | 100% on all four | 85 |
| AL9 | Hatfield, Essendon, North Mymms | EE 90%; O2 100% | 42 |
| AL10 | Hatfield, North Mymms, Welham Green | 100% on all four | 94 |
Marked small sample: under 30 addresses sampled. Listed, but left out of the comparisons above.
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