What area is the TW1 postcode in?

TW1 is a postcode district in Twickenham, Twickenham, London, England. It is part of the TW postcode area.

How many addresses are in the TW1 postcode?

The TW1 postcode district covers Twickenham in Twickenham. The exact address count can be retrieved via the APITier Postcode Lookup API.

How do I look up addresses in TW1 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 TW1. The response returns all PAF addresses as structured JSON including building name, number, street, town, county, and geocoordinates.

Royal Mail PAF · London

TW1 Postcode — Twickenham

TW1 is a postcode district in Twickenham, Twickenham, London, England. Use the lookup below to explore addresses within this postcode district.

TW1

Postcode District

TW — Twickenham

Area

London

Region

Royal Mail PAF

Data Source

Postcode Lookup — TW1 DistrictSample

{
  "_note": "Sample response — enter any postcode above and click Lookup for live data",
  "status": 200,
  "result": {
    "postcode": "TW1 1AA",
    "quality": 1,
    "eastings": 522150,
    "northings": 217599,
    "country": "England",
    "nhs_ha": "London",
    "longitude": -0.255,
    "latitude": 51.4108,
    "european_electoral_region": "London",
    "primary_care_trust": "Twickenham",
    "region": "London",
    "lsoa": "Twickenham 001A",
    "msoa": "Twickenham 001",
    "incode": "1AA",
    "outcode": "TW1",
    "parliamentary_constituency": "Twickenham",
    "admin_district": "Twickenham",
    "parish": "Twickenham, unparished area",
    "admin_county": null,
    "admin_ward": "Twickenham Central",
    "ced": null,
    "ccg": "NHS London",
    "nuts": "Twickenham",
    "codes": {
      "admin_district": "E07000000",
      "admin_county": "E99999999",
      "admin_ward": "E05000000",
      "parish": "E43000000",
      "parliamentary_constituency": "E14000000",
      "ccg": "E38000000",
      "lsoa": "E01000000",
      "msoa": "E02000000"
    }
  }
}

About the TW1 Postcode District

The TW1 postcode district is part of the Twickenham (TW) postcode area, covering Twickenham and surrounding areas in London, England.

Postcodes in the TW1 district follow the format TW1 nXX where n is a digit and XX are letters. Each inward code identifies a specific delivery walk within the district.

The wider Twickenham postcode area (TW) also covers: Richmond, Hounslow, Feltham, Hampton, Isleworth.

Frequently Asked Questions

What area does the TW1 postcode cover?

The TW1 postcode district covers Twickenham in Twickenham, London, England. It is one of 20 districts in the TW postcode area.

How do I look up all addresses in the TW1 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 TW1. The API returns all Royal Mail PAF addresses as structured JSON.

Is TW1 a valid UK postcode district?

Yes. TW1 is a Royal Mail postcode district in Twickenham, England. Full UK postcodes in this district follow the format TW1 followed by a digit and two letters (e.g. TW1 1AA).

TW1 Postcode — Twickenham

About the TW1 Postcode District

Frequently Asked Questions

Other Twickenham Postcode Districts