CT21 postcode

Broadband in CT21 4LJ

Lympne, Folkestone and Hythe

Gigabit broadband is available at this postcode.

Best speedGigabit (1Gbps+)
StandardSuperfastGigabit
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Free, independent comparison · Ofcom verified data · Updated 23 March 2026

Flood Risk

Low

Fibre (FTTP)

No

Best speed

Gigabit (1Gbps+)

Reviewed by Sage MitchellData last verified: 23 March 2026

Speed Calculator

Adjust the options below to see how much broadband speed your household needs.

2
18

HD uses ~5 Mbps per person. 4K uses ~25 Mbps.

Each person on calls needs around 10 Mbps.

Competitive gaming needs low latency as much as raw speed.

Cameras, thermostats, speakers and similar devices each use a few Mbps.

Estimated speed needed14 Mbps

Gigabit broadband (Gigabit (1Gbps+)) is available at CT21 4LJ. That covers your 14 Mbps needs with room to spare.

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Speed Test

Check your current download speed and see how it compares to what is available at CT21 4LJ.

The test downloads a 2 MB file from our server and measures how long it takes.

This test measures download speed only. Results vary depending on network conditions.

Broadband availability

Source: Ofcom Connected Nations 2025 (Jul 2025)

TechnologyAvailableCoverageTypical Speed
Standard (ADSL)81%
81%
10-20 Mbps
Superfast (30+ Mbps)81%
81%
30-80 Mbps
Ultrafast (100+ Mbps)81%
81%
100-300 Mbps
Full Fibre (FTTP)0%
0%
300-900 Mbps
Gigabit81%
81%
900-1,000 Mbps

Speed Distribution at CT21 4LJ

2–5 Mbps (19%)
300+ Mbps (81%)

Source: Ofcom Connected Nations 2025

Mobile coverage

4G & 5G coverage · Ofcom Connected Nations 2025

4G Outdoor

95%

4G Indoor

85%

5G Outdoor

%

Networks with 4G

EEO2ThreeVodafone
Ofcom Connected Nations 2025

Schools nearby

Nearest schools within 5 miles · Ofsted ratings as at Jan 2026

Schools data is currently unavailable.

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Flood risk

🟡

Flood risk: Low

This postcode is in undefined — low risk of flooding from rivers and sea.

Flood Zone

Risk Level

Low

Environment Agency

Air quality

Particulate matter & nitrogen dioxide levels

air quality

Air quality data not available.

PM2.5 (fine particles) μg/m³

WHO guideline: 15 μg/m³

PM10 (coarse particles) μg/m³

WHO guideline: 45 μg/m³

NO₂ (nitrogen dioxide) μg/m³

WHO guideline: 25 μg/m³

DEFRA UK-AIR · Guidelines: WHO 2021

Transport links

Nearest train stations and towns

Nearest train stations

No train stations found within 15 miles

Network Rail / National Rail · Straight-line distances

Council tax bands

Band distribution for Folkestone and Hythe

Most common: Band

A
5%£1,381
B
10%£1,611
C
20%£1,841
D
25%£2,071
E
20%£2,531
F
10%£2,991
G
8%£3,452
H
2%£4,142

Annual council tax estimates for , 2024/25

VOA (Valuation Office Agency)

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Living near CT21 4LJ

CT21 4LJ sits in Lympne, part of Folkestone and Hythe. This guide covers broadband speeds, house prices, schools, and more. Every figure comes from verified public data sources. Use it alongside your own research when comparing areas.

Superfast coverage here stands at 81.3%. Nationally, 93% of UK premises have access. Most properties here can get a decent connection. Ultrafast broadband (100 Mbps+) reaches 81.3% of properties. That is solid coverage for bandwidth-heavy households. Gigabit-capable connections cover 81.3% of premises. Most homes can access gigabit speeds if they choose to.

Looking at the full speed profile for CT21 4LJ gives a better picture of what to expect. 18.8% of connections fall in the 2 to 5 Mbps range. 81.3% of connections fall in the 300 Mbps or faster range. 19% of premises get less than 5 Mbps. That is not enough for reliable video calls or streaming. Over half of connections exceed 300 Mbps. That supports multiple 4K streams, large file transfers, and cloud gaming without issue.

What do the broadband speeds at CT21 4LJ mean in practice? Most premises have superfast speeds. Remote working with video calls and cloud tools should be manageable for most households.

Fixed Wireless Access (FWA) is available to 87.5% of premises at CT21 4LJ. FWA uses a fixed antenna to deliver broadband without a phone line or fibre cable. FWA coverage is strong here. Providers like Three and EE offer home broadband over their mobile networks.

0% of premises at CT21 4LJ fall below the Universal Service Obligation of 10 Mbps. Every property here meets the minimum standard. That is not the case everywhere. Next-generation access (NGA) reaches 81.3% of the area. NGA typically means speeds of 24 Mbps or above.

Flood risk at CT21 4LJ is rated Low. Minor precautions may be worth considering. Check with insurers about any loading on premiums.

The three most common bands are D (25%), C (20%), E (20%). Band D corresponds to 1991 property values of £68,001 to £88,000. Current values are typically much higher. The spread across mid-range bands suggests a varied housing stock.

4G outdoor coverage at CT21 4LJ reaches 95%. Indoor 4G drops to 85%. Some signal loss indoors is normal. Most calls and data should still work inside. Coverage data covers EE, O2, Three, Vodafone. Check each operator individually, as coverage varies by network.

Suitability scores for CT21 4LJ: remote working 50/100, family 50/100, value 50/100. Remote workers may want to verify actual speeds before committing.

The local authority for CT21 4LJ is Folkestone and Hythe. The immediate area is Lympne, a distinct community within the wider district. The CT21 postcode area contains 641 postcodes on this site. Superfast broadband across CT21 ranges from 0% to 100%. CT21 4LJ is below the area average of 92%.

How does CT21 4LJ compare to its neighbours? CT21 4LF (0.04 miles, lympne) has 100% superfast coverage and 100% gigabit. CT21 4LG (0.05 miles, lympne) has 50% superfast coverage and 50% gigabit. CT21 4LL (0.05 miles, lympne) has 5.9% superfast coverage and 5.9% gigabit. CT21 4LH (0.05 miles, lympne) has 50% superfast coverage and 50% gigabit. CT21 4LJ has better superfast coverage than its immediate neighbours.

Not every property at CT21 4LJ gets the same speeds. Run a postcode check with each provider before signing up. Headline speeds are not guarantees. If fibre is unavailable, consider 4G home broadband or satellite as alternatives. Speeds may still be adequate for most uses. Compare contract lengths, total costs over the term, and exit fees. The cheapest monthly rate is not always the best deal.

Every part of Lympne has its own feel. This data gives you the factual starting point. A visit fills in the rest.

What does all of this mean for someone considering CT21 4LJ? Folkestone and Hythe as a local authority area has its own planning priorities, council services, and infrastructure investment plans. Check the council website for the latest. The data covers what can be measured. Lympne has its own character that numbers alone cannot capture. Use these figures as a filter, then visit to get the full picture.

Data sources include Ofcom (broadband and mobile), Land Registry (house prices), Police.uk (crime), Ofsted (schools), Environment Agency (flood risk), and Open-Meteo (air quality). Council tax data comes from the Valuation Office Agency. EPC data is from DLUHC. Transport data uses NaPTAN. Speed distribution figures are from Ofcom Connected Nations. All figures are the latest available at the time of writing.

Data is a starting point for Lympne. Walk the streets at different times. Test your mobile signal. Check parking, noise levels, and the feel of the neighbourhood. Run a speed test on the actual connection. Some things only a visit can reveal.

CT21 4LJ in Lympne: broadband, house prices, crime, schools, and more. All from verified sources. Run a speed test above for a live reading. Compare with nearby postcodes to see how this area stacks up against its neighbours.

More local data is being added for this postcode

This page already has postcode-specific content, and more data-backed sections will appear as the remaining local datasets finish processing.

Frequently asked questions about CT21 4LJ

What are the broadband speeds available at CT21 4LJ?

Superfast broadband (30 Mbps+) is available to 81.3% of premises at CT21 4LJ. Ultrafast coverage is at 81.3%.

What is the average house price near CT21 4LJ?

No recent house price data is available for CT21 4LJ.

What is the flood risk for properties at CT21 4LJ?

CT21 4LJ has a Low flood risk rating. Check Environment Agency maps for detail.

What schools are nearby in the CT21 4LJ area?

School data for CT21 4LJ is being updated. Check the Get Information About Schools service for the latest.

How does crime rate in CT21 4LJ compare to other areas?

Crime data for this area is being updated.

How suitable is CT21 4LJ for remote working?

CT21 4LJ scores 50/100 for remote working suitability. Speeds may limit video-heavy workflows.

What is the mobile signal like at CT21 4LJ?

4G outdoor coverage at CT21 4LJ is 95%. Indoor coverage may be lower.

What is the most common energy efficiency rating near CT21 4LJ?

EPC data for CT21 4LJ is being updated. Check the EPC register for individual property ratings.

What is the council tax band distribution at CT21 4LJ?

Council tax band information for CT21 4LJ is being updated.

How accessible are GP surgeries near CT21 4LJ?

GP surgery data for CT21 4LJ is being updated. Check NHS.uk for the latest.

What transport links are available near CT21 4LJ?

Transport data for CT21 4LJ is being updated.

Is CT21 4LJ a suitable area for families?

CT21 4LJ scores 50/100 for family suitability. Check school and crime sections above for detail.

What is the air quality like at CT21 4LJ?

Air quality data for CT21 4LJ is being updated.

How far is the nearest EV charging point from CT21 4LJ?

EV charging data for CT21 4LJ is being updated. Check Zap-Map for the latest.

Can I get full fibre broadband at CT21 4LJ?

Ultrafast broadband (100 Mbps+) reaches 81.3% of premises. Check Openreach and local operators for FTTP availability.

Area suitability scores

CT21 4LJ

Remote Worker

50

Based on superfast broadband coverage, FTTP %, and 4G mobile outdoor coverage.

Family

50

Based on Ofsted school ratings, crime rate, flood risk, and GP surgery proximity.

Value for Money

50

Based on broadband quality relative to average house price in the area.

Map

Area info

Parish

Lympne

District

Folkestone and Hythe

Region

Constituency

LSOA

E01024536

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