What area is the SG4 postcode in?

SG4 is a postcode district in Stevenage, Stevenage, East of England, England. It is part of the SG postcode area.

How many addresses are in the SG4 postcode?

The SG4 postcode district covers Stevenage in Stevenage. The exact address count can be retrieved via the APITier Postcode Lookup API.

How do I look up addresses in SG4 programmatically?

Use the APITier Postcode Lookup API: GET https://postcode.apitier.com/v1/postcodes/{postcode}?x-api-key=YOUR_KEY — where the postcode begins with SG4. The response returns all PAF addresses as structured JSON including building name, number, street, town, county, and geocoordinates.

Royal Mail PAF · East of England

SG4 Postcode — Stevenage

SG4 is a postcode district in Stevenage, Stevenage, East of England, England. Use the lookup below to explore addresses within this postcode district.

SG4

Postcode District

SG — Stevenage

Area

East of England

Region

Royal Mail PAF

Data Source

Postcode Lookup — SG4 DistrictSample

{
  "_note": "Sample response — enter any postcode above and click Lookup for live data",
  "status": 200,
  "result": {
    "postcode": "SG4 1AA",
    "quality": 1,
    "eastings": 521422,
    "northings": 267860,
    "country": "England",
    "nhs_ha": "East of England",
    "longitude": -0.2654,
    "latitude": 51.8636,
    "european_electoral_region": "East of England",
    "primary_care_trust": "Stevenage",
    "region": "East of England",
    "lsoa": "Stevenage 001A",
    "msoa": "Stevenage 001",
    "incode": "1AA",
    "outcode": "SG4",
    "parliamentary_constituency": "Stevenage",
    "admin_district": "Stevenage",
    "parish": "Stevenage, unparished area",
    "admin_county": "East of England",
    "admin_ward": "Stevenage Central",
    "ced": null,
    "ccg": "NHS East of England",
    "nuts": "Stevenage",
    "codes": {
      "admin_district": "E07000000",
      "admin_county": "E10000000",
      "admin_ward": "E05000000",
      "parish": "E43000000",
      "parliamentary_constituency": "E14000000",
      "ccg": "E38000000",
      "lsoa": "E01000000",
      "msoa": "E02000000"
    }
  }
}

About the SG4 Postcode District

The SG4 postcode district is part of the Stevenage (SG) postcode area, covering Stevenage and surrounding areas in East of England, England.

Postcodes in the SG4 district follow the format SG4 nXX where n is a digit and XX are letters. Each inward code identifies a specific delivery walk within the district.

The wider Stevenage postcode area (SG) also covers: Hitchin, Letchworth, Baldock, Knebworth, Welwyn.

Frequently Asked Questions

What area does the SG4 postcode cover?

The SG4 postcode district covers Stevenage in Stevenage, East of England, England. It is one of 19 districts in the SG postcode area.

How do I look up all addresses in the SG4 postcode?

Use the live lookup widget above or call the APITier Postcode Lookup API: GET https://postcode.apitier.com/v1/postcodes/{full postcode}?x-api-key=YOUR_KEY. Replace {full postcode} with any complete postcode beginning SG4. The API returns all Royal Mail PAF addresses as structured JSON.

Is SG4 a valid UK postcode district?

Yes. SG4 is a Royal Mail postcode district in Stevenage, England. Full UK postcodes in this district follow the format SG4 followed by a digit and two letters (e.g. SG4 1AA).

SG4 Postcode — Stevenage

About the SG4 Postcode District

Frequently Asked Questions

Other Stevenage Postcode Districts