What area is the SO31 postcode in?

SO31 is a postcode district in Southampton, Southampton, South East, England. It is part of the SO postcode area.

How many addresses are in the SO31 postcode?

The SO31 postcode district covers Southampton in Southampton. The exact address count can be retrieved via the APITier Postcode Lookup API.

How do I look up addresses in SO31 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 SO31. The response returns all PAF addresses as structured JSON including building name, number, street, town, county, and geocoordinates.

Royal Mail PAF · South East

SO31 Postcode — Southampton

SO31 is a postcode district in Southampton, Southampton, South East, England. Use the lookup below to explore addresses within this postcode district.

SO31

Postcode District

SO — Southampton

Area

South East

Region

Royal Mail PAF

Data Source

Postcode Lookup — SO31 DistrictSample

{
  "_note": "Sample response — enter any postcode above and click Lookup for live data",
  "status": 200,
  "result": {
    "postcode": "SO31 1AA",
    "quality": 1,
    "eastings": 443050,
    "northings": 160367,
    "country": "England",
    "nhs_ha": "South East",
    "longitude": -1.385,
    "latitude": 50.8952,
    "european_electoral_region": "South East",
    "primary_care_trust": "Southampton",
    "region": "South East",
    "lsoa": "Southampton 001A",
    "msoa": "Southampton 001",
    "incode": "1AA",
    "outcode": "SO31",
    "parliamentary_constituency": "Southampton",
    "admin_district": "Southampton",
    "parish": "Southampton, unparished area",
    "admin_county": "South East",
    "admin_ward": "Southampton Central",
    "ced": null,
    "ccg": "NHS South East",
    "nuts": "Southampton",
    "codes": {
      "admin_district": "E07000000",
      "admin_county": "E10000000",
      "admin_ward": "E05000000",
      "parish": "E43000000",
      "parliamentary_constituency": "E14000000",
      "ccg": "E38000000",
      "lsoa": "E01000000",
      "msoa": "E02000000"
    }
  }
}

About the SO31 Postcode District

The SO31 postcode district is part of the Southampton (SO) postcode area, covering Southampton and surrounding areas in South East, England.

Postcodes in the SO31 district follow the format SO31 nXX where n is a digit and XX are letters. Each inward code identifies a specific delivery walk within the district.

The wider Southampton postcode area (SO) also covers: Eastleigh, Romsey, Hythe, Lyndhurst, Fordingbridge.

Frequently Asked Questions

What area does the SO31 postcode cover?

The SO31 postcode district covers Southampton in Southampton, South East, England. It is one of 24 districts in the SO postcode area.

How do I look up all addresses in the SO31 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 SO31. The API returns all Royal Mail PAF addresses as structured JSON.

Is SO31 a valid UK postcode district?

Yes. SO31 is a Royal Mail postcode district in Southampton, England. Full UK postcodes in this district follow the format SO31 followed by a digit and two letters (e.g. SO31 1AA).

SO31 Postcode — Southampton

About the SO31 Postcode District

Frequently Asked Questions

Other Southampton Postcode Districts