What area is the PO3 postcode in?

PO3 is a postcode district in Portsmouth, Portsmouth, South East, England. It is part of the PO postcode area.

How many addresses are in the PO3 postcode?

The PO3 postcode district covers Portsmouth in Portsmouth. The exact address count can be retrieved via the APITier Postcode Lookup API.

How do I look up addresses in PO3 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 PO3. The response returns all PAF addresses as structured JSON including building name, number, street, town, county, and geocoordinates.

Royal Mail PAF · South East

PO3 Postcode — Portsmouth

PO3 is a postcode district in Portsmouth, Portsmouth, South East, England. Use the lookup below to explore addresses within this postcode district.

PO3

Postcode District

PO — Portsmouth

Area

South East

Region

Royal Mail PAF

Data Source

Postcode Lookup — PO3 DistrictSample

{
  "_note": "Sample response — enter any postcode above and click Lookup for live data",
  "status": 200,
  "result": {
    "postcode": "PO3 1AA",
    "quality": 1,
    "eastings": 458996,
    "northings": 145937,
    "country": "England",
    "nhs_ha": "South East",
    "longitude": -1.1572,
    "latitude": 50.7652,
    "european_electoral_region": "South East",
    "primary_care_trust": "Portsmouth",
    "region": "South East",
    "lsoa": "Portsmouth 001A",
    "msoa": "Portsmouth 001",
    "incode": "1AA",
    "outcode": "PO3",
    "parliamentary_constituency": "Portsmouth",
    "admin_district": "Portsmouth",
    "parish": "Portsmouth, unparished area",
    "admin_county": "South East",
    "admin_ward": "Portsmouth Central",
    "ced": null,
    "ccg": "NHS South East",
    "nuts": "Portsmouth",
    "codes": {
      "admin_district": "E07000000",
      "admin_county": "E10000000",
      "admin_ward": "E05000000",
      "parish": "E43000000",
      "parliamentary_constituency": "E14000000",
      "ccg": "E38000000",
      "lsoa": "E01000000",
      "msoa": "E02000000"
    }
  }
}

About the PO3 Postcode District

The PO3 postcode district is part of the Portsmouth (PO) postcode area, covering Portsmouth and surrounding areas in South East, England.

Postcodes in the PO3 district follow the format PO3 nXX where n is a digit and XX are letters. Each inward code identifies a specific delivery walk within the district.

The wider Portsmouth postcode area (PO) also covers: Havant, Gosport, Fareham, Waterlooville, Newport (IoW).

Frequently Asked Questions

What area does the PO3 postcode cover?

The PO3 postcode district covers Portsmouth in Portsmouth, South East, England. It is one of 34 districts in the PO postcode area.

How do I look up all addresses in the PO3 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 PO3. The API returns all Royal Mail PAF addresses as structured JSON.

Is PO3 a valid UK postcode district?

Yes. PO3 is a Royal Mail postcode district in Portsmouth, England. Full UK postcodes in this district follow the format PO3 followed by a digit and two letters (e.g. PO3 1AA).

PO3 Postcode — Portsmouth

About the PO3 Postcode District

Frequently Asked Questions

Other Portsmouth Postcode Districts