BT31 postcode
Broadband in BT31 9DF
Castlewellan, Newry, Mourne and Down
Gigabit broadband is available at this postcode.
Free, independent comparison · Ofcom verified data · Updated 25 March 2026
Flood Risk
Low
Fibre (FTTP)
No
Best speed
Gigabit (1Gbps+)
Speed Calculator
Adjust the options below to see how much broadband speed your household needs.
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.
Gigabit broadband (Gigabit (1Gbps+)) is available at BT31 9DF. That covers your 14 Mbps needs with room to spare.
Speed Test
Check your current download speed and see how it compares to what is available at BT31 9DF.
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)
| Technology | Available | Coverage | Typical Speed |
|---|---|---|---|
| Standard (ADSL) | 100% | 100% | 10-20 Mbps |
| Superfast (30+ Mbps) | 100% | 100% | 30-80 Mbps |
| Ultrafast (100+ Mbps) | 88% | 88% | 100-300 Mbps |
| Full Fibre (FTTP) | N/A | N/A | 300-900 Mbps |
| Gigabit | 88% | 88% | 900-1,000 Mbps |
Speed Distribution at BT31 9DF
Source: Ofcom Connected Nations 2025
Mobile coverage
4G & 5G coverage · Ofcom Connected Nations 2025
4G Outdoor
4G Indoor
5G Outdoor
Networks with 4G
Schools nearby
Nearest schools within 5 miles · Ofsted ratings as at Jan 2026
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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
Air quality
Particulate matter & nitrogen dioxide levels
air quality
Air quality data not available.
WHO guideline: 15 μg/m³
WHO guideline: 45 μg/m³
WHO guideline: 25 μg/m³
Transport links
Nearest train stations and towns
Nearest train stations
No train stations found within 15 miles
Council tax bands
Band distribution for Newry, Mourne and Down
Most common: Band
Annual council tax estimates for , 2024/25
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Castlewellan is home to BT31 9DF. Whether you live here or plan to move, the data below paints a clear picture. Broadband, schools, crime, house prices, and local services all follow. The numbers speak for themselves.
Superfast broadband (30 Mbps+) coverage at BT31 9DF stands at 100%. That is above the UK average of 93%. Ultrafast broadband (100 Mbps+) reaches 87.5% of properties. That is solid coverage for bandwidth-heavy households. Gigabit-capable connections cover 87.5% of premises. Most homes can access gigabit speeds if they choose to.
The speed distribution at BT31 9DF tells a more detailed story than headline figures alone. 12.5% of connections fall in the 30 to 300 Mbps range. 87.5% of connections fall in the 300 Mbps or faster range. No premises here are stuck below 5 Mbps. Every property meets the basic threshold for video calls. Over half of connections exceed 300 Mbps. That supports multiple 4K streams, large file transfers, and cloud gaming without issue.
Here is how the broadband at BT31 9DF maps against common household needs. Most premises have superfast speeds. Remote working with video calls and cloud tools should be manageable for most households.
FWA broadband has not reached BT31 9DF yet. Satellite services like Starlink or 4G home broadband routers can fill the gap where fixed-line options are limited.
0% of premises at BT31 9DF 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 100% of the area. NGA typically means speeds of 24 Mbps or above.
Flood risk at BT31 9DF 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 BT31 9DF 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 BT31 9DF: remote working 55/100, family 50/100, value 50/100. Remote workers may want to verify actual speeds before committing.
The local authority for BT31 9DF is Newry, Mourne and Down. The immediate area is Castlewellan, a distinct community within the wider district. The BT31 postcode area contains 285 postcodes on this site. Superfast broadband across BT31 ranges from 50% to 100%. BT31 9DF is close to the area average of 98%.
How does BT31 9DF compare to its neighbours? BT31 9GG (0.03 miles, castlewellan) has 100% superfast coverage and 100% gigabit. BT31 9DG (0.03 miles, castlewellan) has 100% superfast coverage and 89.5% gigabit. BT31 9DA (0.04 miles, castlewellan) has 100% superfast coverage and 100% gigabit. BT31 9DX (0.06 miles, castlewellan) has 100% superfast coverage and 86.7% gigabit. Coverage is broadly similar across these neighbouring postcodes.
Broadband availability varies by provider and by property. At BT31 9DF, check individual coverage tools from BT, Sky, Virgin Media, and local operators. 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.
Castlewellan offers a mix of residential properties and local amenities. The character of any area is best judged in person.
Looking at the overall picture for BT31 9DF, a few things are worth highlighting. Connectivity at BT31 9DF is a strength. Strong broadband coverage gives flexibility for both working and leisure. The area scores well on that front. Newry, Mourne and Down 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. Castlewellan 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.
Before making a decision about BT31 9DF, visit in person. Check the commute at rush hour. Try the mobile signal indoors. Look at local shops and green spaces. Ask about broadband reliability, not just speed. Data sets the scene, but real life fills in the gaps.
That is the full data picture for BT31 9DF in Castlewellan. Use it alongside your own research. For the most current broadband speeds, run a live speed test from this page. Check back periodically as data is refreshed with new releases.
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 BT31 9DF
What are the broadband speeds available at BT31 9DF?
Superfast broadband (30 Mbps+) is available to 100% of premises at BT31 9DF. Ultrafast coverage is at 87.5%.
What is the average house price near BT31 9DF?
No recent house price data is available for BT31 9DF.
What is the flood risk for properties at BT31 9DF?
BT31 9DF has a Low flood risk rating. Check Environment Agency maps for detail.
What schools are nearby in the BT31 9DF area?
School data for BT31 9DF is being updated. Check the Get Information About Schools service for the latest.
How does crime rate in BT31 9DF compare to other areas?
Crime data for this area is being updated.
How suitable is BT31 9DF for remote working?
BT31 9DF scores 55/100 for remote working suitability. Speeds may limit video-heavy workflows.
What is the mobile signal like at BT31 9DF?
4G outdoor coverage at BT31 9DF is 95%. Indoor coverage may be lower.
What is the most common energy efficiency rating near BT31 9DF?
EPC data for BT31 9DF is being updated. Check the EPC register for individual property ratings.
What is the council tax band distribution at BT31 9DF?
Council tax band information for BT31 9DF is being updated.
How accessible are GP surgeries near BT31 9DF?
GP surgery data for BT31 9DF is being updated. Check NHS.uk for the latest.
What transport links are available near BT31 9DF?
Transport data for BT31 9DF is being updated.
Is BT31 9DF a suitable area for families?
BT31 9DF scores 50/100 for family suitability. Check school and crime sections above for detail.
What is the air quality like at BT31 9DF?
Air quality data for BT31 9DF is being updated.
How far is the nearest EV charging point from BT31 9DF?
EV charging data for BT31 9DF is being updated. Check Zap-Map for the latest.
Can I get full fibre broadband at BT31 9DF?
Ultrafast broadband (100 Mbps+) reaches 87.5% of premises. Check Openreach and local operators for FTTP availability.
Area suitability scores
BT31 9DFRemote Worker
55Based on superfast broadband coverage, FTTP %, and 4G mobile outdoor coverage.
Family
50Based on Ofsted school ratings, crime rate, flood risk, and GP surgery proximity.
Value for Money
50Based on broadband quality relative to average house price in the area.
Map
Area info
Parish
Castlewellan
District
Newry, Mourne and Down
Region
Constituency
LSOA
N21000751
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