What area is the SO postcode in?

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

How many addresses are in the SO postcode?

The SO 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 SO 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 SO. The response returns all PAF addresses as structured JSON including building name, number, street, town, county, and geocoordinates.

Royal Mail PAF · South East

SO Postcode — Southampton

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

Postcode District

SO — Southampton

Area

South East

Region

Royal Mail PAF

Data Source

Postcode Lookup — SO DistrictSample

{
  "_note": "Sample response — enter any postcode above and click Lookup for live data",
  "status": 200,
  "result": {
    "postcode": "SO 1AA",
    "quality": 1,
    "eastings": 441496,
    "northings": 167382,
    "country": "England",
    "nhs_ha": "South East",
    "longitude": -1.4072,
    "latitude": 50.9584,
    "european_electoral_region": "South East",
    "primary_care_trust": "Southampton",
    "region": "South East",
    "lsoa": "Southampton 001A",
    "msoa": "Southampton 001",
    "incode": "1AA",
    "outcode": "SO",
    "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 SO Postcode District

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

Postcodes in the SO district follow the format SO 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 SO postcode cover?

The SO 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 SO 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 SO. The API returns all Royal Mail PAF addresses as structured JSON.

Is SO a valid UK postcode district?

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

SO Postcode — Southampton

About the SO Postcode District

Frequently Asked Questions

Other Southampton Postcode Districts