Postcode Districts within Postcode Area AL

AL1

St Albans

AL2

Chiswell Green , Potters Crouch , Park Street , Napsbury , London Colney , Frogmore , Colney Street , Bricket Wood , St Albans

AL3

Sandridge , Redbourn , Porters Wood , Markyate , Gorhambury , Flamstead , Childwickbury , St Albans

AL4

Wheathampstead , Tyttenhanger , Smallford , Sandridge , Oaklands , Marshalswick , Jersey Farm , London Colney , Colney Heath , St Albans

AL5

Harpenden

AL6

Tewin , Rabley Heath , Digswell , Ayot St Lawrence , Ayot St Peter , Welwyn

AL7

Welwyn Garden City

AL8

Lemsford , Welwyn Garden City

AL9

Hatfield , Brookmans Park , Essendon , North Mymms

AL10

Hatfield