Map of the 01438 Stevenage STD dialling Area Code
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The Stevenage 01438 Area Code (Stevenage Dialling Code)

The 01438 area code is a 4 digit geographical dialling code (excluding the zero) used in telecommunications for the Stevenage area.

The local telephone numbers within the 01438 are 6 digits long.

The correct format in which to write a telephone number from the Stevenage area code is (01438) xxxxxx.

Where is the 01438 Area Code?

The Stevenage 01438 dialling code is situated in the county of Hertfordshire in the East of England Region of the UK.

When do I need to use the 01438 Stevenage dialling code?

You will need to use a dialling code if you are calling from a mobile phone or a landline outside of the 01438 Stevenage dialling code area. If you are calling a local number within the same area code with a landline telephone you do not need to use the 01438 dialling code.

Phoning the 01438 Dialling Code from Outside of the UK

If you are calling from outside of the UK. You will need to add the code for dialling internationally. This varies country to country, followed by the UK country code (44) followed by the area code without the initial zero (1438).

RegionInternational PrefixCountry CodeArea Code
United States and Canada011441438
Europe00441438
Australia0011441438

Origins of the 01438 Stevenage Area Code

Before the 16th April 1995 known as PhONEday which changed telephone area codes by inserting a 1 at the beginning. The area code was 0438.

the historic mnemonic code for the 01438 area was HE8. The first two characters are taken from the letters H and E in HErtfordshire. On an old rotary dial telephone this was entered by dialling the numbers 4, 3 and 8.

picture showing an old rotary dial for the 01438 Stevenage area code
An old rotary dial for the 01438 Stevenage area code.

Map of the 01438 Stevenage dialling Code Area

The shaded area on the map represent the estimated extent of the 01438 Stevenage phone area code.

The blue icons on the map represent the locations of telephone exchanges serving the 01438 area. Click on an icon for more details

Map of the 01438 Stevenage area code
Map of the 01438 Stevenage area code and surrounding areas

Towns and Villages within the Stevenage 01438-Stevenage dialling Code

Aston
Benington
Breachwood Green
Kimpton
Knebworth
Little Wymondley
Oaklands
Stevenage
Tewin
Walkern
Welwyn
Welwyn Garden City
Whitwell (North Hertfordshire)

Known Telephone Exchanges within the Stevenage 01438-Stevenage dialling Code

Welwyn (SMWEP) Hertfordshire
Stevenage (SMSX) Hertfordshire
Kimpton (SMKP) Hertfordshire
Codicote (SMCI) Hertfordshire