What area is the CB21 postcode in?

CB21 is a postcode district in Cambridge, Cambridge, East of England, England. It is part of the CB postcode area.

How many addresses are in the CB21 postcode?

The CB21 postcode district covers Cambridge in Cambridge. The exact address count can be retrieved via the APITier Postcode Lookup API.

How do I look up addresses in CB21 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 CB21. The response returns all PAF addresses as structured JSON including building name, number, street, town, county, and geocoordinates.

Royal Mail PAF · East of England

CB21 Postcode — Cambridge

CB21 is a postcode district in Cambridge, Cambridge, East of England, England. Use the lookup below to explore addresses within this postcode district.

CB21

Postcode District

CB — Cambridge

Area

East of England

Region

Royal Mail PAF

Data Source

Postcode Lookup — CB21 DistrictSample

{
  "_note": "Sample response — enter any postcode above and click Lookup for live data",
  "status": 200,
  "result": {
    "postcode": "CB21 1AA",
    "quality": 1,
    "eastings": 550836,
    "northings": 301248,
    "country": "England",
    "nhs_ha": "East of England",
    "longitude": 0.1548,
    "latitude": 52.1644,
    "european_electoral_region": "East of England",
    "primary_care_trust": "Cambridge",
    "region": "East of England",
    "lsoa": "Cambridge 001A",
    "msoa": "Cambridge 001",
    "incode": "1AA",
    "outcode": "CB21",
    "parliamentary_constituency": "Cambridge",
    "admin_district": "Cambridge",
    "parish": "Cambridge, unparished area",
    "admin_county": "East of England",
    "admin_ward": "Cambridge Central",
    "ced": null,
    "ccg": "NHS East of England",
    "nuts": "Cambridge",
    "codes": {
      "admin_district": "E07000000",
      "admin_county": "E10000000",
      "admin_ward": "E05000000",
      "parish": "E43000000",
      "parliamentary_constituency": "E14000000",
      "ccg": "E38000000",
      "lsoa": "E01000000",
      "msoa": "E02000000"
    }
  }
}

About the CB21 Postcode District

The CB21 postcode district is part of the Cambridge (CB) postcode area, covering Cambridge and surrounding areas in East of England, England.

Postcodes in the CB21 district follow the format CB21 nXX where n is a digit and XX are letters. Each inward code identifies a specific delivery walk within the district.

The wider Cambridge postcode area (CB) also covers: Ely, Newmarket, Huntingdon, Royston.

Frequently Asked Questions

What area does the CB21 postcode cover?

The CB21 postcode district covers Cambridge in Cambridge, East of England, England. It is one of 16 districts in the CB postcode area.

How do I look up all addresses in the CB21 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 CB21. The API returns all Royal Mail PAF addresses as structured JSON.

Is CB21 a valid UK postcode district?

Yes. CB21 is a Royal Mail postcode district in Cambridge, England. Full UK postcodes in this district follow the format CB21 followed by a digit and two letters (e.g. CB21 1AA).

CB21 Postcode — Cambridge

About the CB21 Postcode District

Frequently Asked Questions

Other Cambridge Postcode Districts