AL9 broadband and area guide
Ofcom coverage, connection speeds, house prices and local data for 426 postcodes across 3 sectors in Welwyn Hatfield.
Gigabit
58%
Superfast
88%
Postcodes
426
AL9 in East Hertfordshire holds 426 postcodes with strong gigabit coverage at 60.2% and moderate below-10Mbps at 2.4%, suggesting uneven infrastructure build.
Broadband speeds in AL9
Share of AL9 premises by the fastest download speed available, averaged across all 426 postcodes in the district.
AL9 shows the classic village and suburban pattern where modern infrastructure reaches some areas whilst missing others. Gigabit reaches 60.2% of postcodes, providing 300 Mbps and above to roughly three-fifths. Superfast coverage spans 88.4%, leaving 11.6% without modern baseline speeds. Within the distribution, 60.2% sit at gigabit levels, 28.2% occupy the 30 to 300 Mbps tier, and 2.4% fall below 10 Mbps. Below-universal service obligation postcodes account for 0.1%. The outward code shows a clear split: three-fifths have gigabit access, while two-fifths rely on superfast or slower options. Moving to or within AL9 warrants a speed check.
Source: Ofcom Connected Nations. Percentages are district-wide averages of postcode-level availability, so rows may not sum to exactly 100%.
Connectivity in detail
Below 10 Mbps USO
<1%
Premises unable to get the 10 Mbps universal service minimum
Fixed wireless
0%
Premises that can use a fixed wireless access service
Broadband by sector
AL9 splits into 3 postcode sectors. Coverage and prices can differ street by street, so open a sector below to find your exact postcode.
| Sector | Postcodes | Superfast | Full fibre | Gigabit |
|---|---|---|---|---|
| AL9 5 | 127 | 88% | TBC | 53% |
| AL9 6 | 110 | 82% | TBC | 52% |
| AL9 7 | 189 | 93% | TBC | 65% |
All AL9 5 postcodes (127)
All AL9 6 postcodes (110)
All AL9 7 postcodes (189)
Best deals
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Living in Welwyn Hatfield
AL9 mirrors common village-and-suburban patterns where fibre or cable deployment has reached developed centres but left other postcodes with older copper infrastructure. Moving to or within AL9 warrants a speed check.
Remote worker score
53/100
Connectivity and amenities for home working
Family score
50/100
Schools, safety and family amenities
Value score
50/100
What you get for the local price level
AL9 broadband FAQs
Is gigabit available throughout AL9?
60.2% of postcodes qualify, leaving 40% reliant on superfast or slower speeds.
How many are below 10 Mbps in AL9?
2.4%, a small but present minority.
What's the postcode count for AL9?
426 postcodes.
Should I check my AL9 address before relocating?
Yes. 60% get gigabit, but 40% are on slower tiers, so postcodes vary.
Neighbouring districts
Check your exact postcode
Every postcode in AL9 has its own page with broadband speeds, house prices, school ratings and crime stats. You can also compare providers for your address.
Data sources: Broadband data from Ofcom Connected Nations 2025 · House prices from HM Land Registry · Crime from Police.uk · See all data sources