What area is the BL4 postcode in?

BL4 is a postcode district in Bolton, Bolton, North West, England. It is part of the BL postcode area.

How many addresses are in the BL4 postcode?

The BL4 postcode district covers Bolton in Bolton. The exact address count can be retrieved via the APITier Postcode Lookup API.

How do I look up addresses in BL4 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 BL4. The response returns all PAF addresses as structured JSON including building name, number, street, town, county, and geocoordinates.

Royal Mail PAF · North West

BL4 Postcode — Bolton

BL4 is a postcode district in Bolton, Bolton, North West, England. Use the lookup below to explore addresses within this postcode district.

BL4

Postcode District

BL — Bolton

Area

North West

Region

Royal Mail PAF

Data Source

Postcode Lookup — BL4 DistrictSample

{
  "_note": "Sample response — enter any postcode above and click Lookup for live data",
  "status": 200,
  "result": {
    "postcode": "BL4 1AA",
    "quality": 1,
    "eastings": 372714,
    "northings": 462598,
    "country": "England",
    "nhs_ha": "North West",
    "longitude": -2.3898,
    "latitude": 53.618,
    "european_electoral_region": "North West",
    "primary_care_trust": "Bolton",
    "region": "North West",
    "lsoa": "Bolton 001A",
    "msoa": "Bolton 001",
    "incode": "1AA",
    "outcode": "BL4",
    "parliamentary_constituency": "Bolton",
    "admin_district": "Bolton",
    "parish": "Bolton, unparished area",
    "admin_county": "North West",
    "admin_ward": "Bolton Central",
    "ced": null,
    "ccg": "NHS North West",
    "nuts": "Bolton",
    "codes": {
      "admin_district": "E07000000",
      "admin_county": "E10000000",
      "admin_ward": "E05000000",
      "parish": "E43000000",
      "parliamentary_constituency": "E14000000",
      "ccg": "E38000000",
      "lsoa": "E01000000",
      "msoa": "E02000000"
    }
  }
}

About the BL4 Postcode District

The BL4 postcode district is part of the Bolton (BL) postcode area, covering Bolton and surrounding areas in North West, England.

Postcodes in the BL4 district follow the format BL4 nXX where n is a digit and XX are letters. Each inward code identifies a specific delivery walk within the district.

The wider Bolton postcode area (BL) also covers: Horwich, Farnworth, Westhoughton, Radcliffe.

Frequently Asked Questions

What area does the BL4 postcode cover?

The BL4 postcode district covers Bolton in Bolton, North West, England. It is one of 10 districts in the BL postcode area.

How do I look up all addresses in the BL4 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 BL4. The API returns all Royal Mail PAF addresses as structured JSON.

Is BL4 a valid UK postcode district?

Yes. BL4 is a Royal Mail postcode district in Bolton, England. Full UK postcodes in this district follow the format BL4 followed by a digit and two letters (e.g. BL4 1AA).

BL4 Postcode — Bolton

About the BL4 Postcode District

Frequently Asked Questions

Other Bolton Postcode Districts