AL10 postcode area guide — Welwyn Hatfield

Where is AL10?

Broadband & internet speeds in AL10

Excellent coverage

Broadband availability in the AL10 postcode district (Welwyn Hatfield) is Excellent — gigabit-capable full fibre is widely available. Across the 746 postcodes Ofcom measures in AL10, superfast broadband (30 Mbit/s or faster) reaches 97.2% of premises and gigabit-capable lines are available to 82.9%.

Around 0% of premises in AL10 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 AL10

Run a speed test to see what you're actually getting, or check your exact postcode.

Mobile signal around Welwyn Hatfield

Ofcom's coverage model for the wider Welwyn Hatfield district (52,289 premises):

Signal varies street by street — use the mobile coverage checker to compare EE, O2, Three and Vodafone at an exact postcode.

Crime in AL10

Police recorded 394 incidents within about a mile of the centre of AL10 in May 2026 (latest published street-level data). The breakdown:

Raw counts favour busy town centres — a high street with shops and nightlife records more incidents than a residential cul-de-sac. Source: police.uk open data (point sample around the district centroid).

House prices in AL10

Based on 257 sales registered with HM Land Registry in the last 12 months, the median sold price in AL10 is £360,000, essentially flat on the previous year (£360,000).

Latest recorded sales in AL10

Contains HM Land Registry data © Crown copyright and database right 2026, licensed under the Open Government Licence v3.0.

Who lives here? Welwyn Hatfield demographics

Census 2021 figures for the wider Welwyn Hatfield district (119,834 residents, 46,209 households):

Source: ONS Census 2021 (district level — the finest openly licensed cut we republish). © Crown copyright, OGL v3.0.

Schools in and around AL10

Source: DfE Get Information about Schools (England & Wales). Check Ofsted report cards for inspection detail — headline one-word grades were retired in 2024.

Food hygiene ratings in AL10

194 rated food businesses operate in AL10. 128 hold the top rating of 5, 25 are rated 4, and 4 are rated 2 or below.

Among the 5-rated: 3 Brewers of St Albans, 648 Nagoya Oriental Store, 7 M.B Food Court, 7 Spices Biryani, Aaroh Foods.

Source: Food Standards Agency, food hygiene ratings (FHRS) open data.

Energy performance (EPC) in AL10

From a sample of 329 Energy Performance Certificates across 9 AL10 postcodes, the most common rating is band C (average band C). 76% of sampled homes are rated C or better.

Source: MHCLG Energy Performance of Buildings Data (England & Wales), sampled at postcode level and refreshed monthly. Individual certificates are on each postcode’s page.

Phone area codes for Welwyn Hatfield

Landlines around AL10 typically use:

Had a call from an unknown number? Use our free UK phone number checker to see who called.

What's it like living in AL10?

Postcodes in AL10

Neighbouring districts

All St Albans (AL) postcode districts ›

Frequently asked questions

Sources: HM Land Registry Price Paid Data, police.uk street-level crime, Ofcom Connected Nations, ONS Census 2021, DfE Get Information about Schools, Food Standards Agency FHRS — all © Crown copyright, licensed under the Open Government Licence v3.0. Figures are area aggregates; individual addresses vary. Energy performance (EPC) data will be added when our Open Data Communities registration is approved.