CF3 · Cardiff

CF3 broadband and area guide

Ofcom coverage, connection speeds, house prices and local data for 915 postcodes across 7 sectors in Cardiff.

Full fibre

Gigabit

93%

Superfast

99%

Postcodes

915

Caerphilly's CF3 delivers strong central performance: 93.4% gigabit, 98.8% superfast across 915 postcodes, with 33.9% fixed wireless support.

Broadband speeds in CF3

Share of CF3 premises by the fastest download speed available, averaged across all 915 postcodes in the district.

Gigabit networks reach 93.4% of the 915 postcodes, a figure competitive with Cambridge's top performers like CB4. Cable and fibre infrastructure have achieved near-complete saturation across Caerphilly town centre. Superfast penetration is near-universal at 98.8%, ensuring reliable baseline speeds across essentially all postcodes. Wireless networks support 33.9% of addresses, a meaningful presence for network redundancy and choice. Below-10Mbps premises are rare at 0.3%, making slow broadband effectively absent from the district. No postcodes fall short of Universal Service Obligation coverage. The speed split is heavily weighted gigabit-wise: 93.4% achieve ultrafast speeds, only 5.4% occupy the 30-300 Mbps band. This concentration reflects mature infrastructure investment in central Caerphilly.

Under 2 Mbps

2 to 5 Mbps

<1%

5 to 10 Mbps

<1%

10 to 30 Mbps

<1%

30 to 300 Mbps

300 Mbps and above

93%

Source: Ofcom Connected Nations. Percentages are district-wide averages of postcode-level availability, so rows may not sum to exactly 100%.

Connectivity in detail

Below 10 Mbps USO

Premises unable to get the 10 Mbps universal service minimum

Fixed wireless

34%

Premises that can use a fixed wireless access service

Broadband by sector

CF3 splits into 7 postcode sectors. Coverage and prices can differ street by street, so open a sector below to find your exact postcode.

Sector	Postcodes	Superfast	Full fibre	Gigabit
CF3 0	217	99%	0%	96%
CF3 1	87	100%	TBC	97%
CF3 2	103	97%	0%	67%
CF3 3	152	100%	0%	98%
CF3 4	118	100%	0%	98%
CF3 5	179	99%	0%	97%
CF3 6	59	94%	0%	92%

All CF3 0 postcodes (217)

CF3 0AA CF3 0AB CF3 0AD CF3 0AE CF3 0AF CF3 0AG CF3 0AH CF3 0AJ CF3 0AL CF3 0AN CF3 0AP CF3 0AQ CF3 0AR CF3 0AS CF3 0AT CF3 0AU CF3 0AW CF3 0AX CF3 0AY CF3 0AZ CF3 0BA CF3 0BB CF3 0BD CF3 0BE CF3 0BF CF3 0BG CF3 0BH CF3 0BJ CF3 0BL CF3 0BN CF3 0BP CF3 0BQ CF3 0BS CF3 0BT CF3 0BU CF3 0BW CF3 0BX CF3 0BY CF3 0BZ CF3 0DA CF3 0DB CF3 0DD CF3 0DE CF3 0DF CF3 0DG CF3 0DH CF3 0DJ CF3 0DL CF3 0DN CF3 0DP CF3 0DQ CF3 0DR CF3 0DS CF3 0DT CF3 0DU CF3 0DW CF3 0DX CF3 0DY CF3 0DZ CF3 0EA CF3 0EB CF3 0ED CF3 0EE CF3 0EF CF3 0EG CF3 0EH CF3 0EJ CF3 0EL CF3 0EN CF3 0EP CF3 0EQ CF3 0ER CF3 0ES CF3 0ET CF3 0EU CF3 0EW CF3 0EY CF3 0FA CF3 0FB CF3 0FD CF3 0FE CF3 0FF CF3 0FG CF3 0FH CF3 0FJ CF3 0FL CF3 0FN CF3 0FP CF3 0GA CF3 0GB CF3 0HA CF3 0HB CF3 0HD CF3 0HE CF3 0HF CF3 0HG CF3 0HH CF3 0HJ CF3 0HL CF3 0HN CF3 0HP CF3 0HQ CF3 0HR CF3 0HS CF3 0HT CF3 0HU CF3 0HW CF3 0HX CF3 0HY CF3 0HZ CF3 0JA CF3 0JB CF3 0JD CF3 0JE CF3 0JF CF3 0JG CF3 0JH CF3 0JJ CF3 0JL CF3 0JN CF3 0JP CF3 0JQ CF3 0JR CF3 0JS CF3 0JT CF3 0JU CF3 0JW CF3 0JX CF3 0JY CF3 0JZ CF3 0LA CF3 0LB CF3 0LD CF3 0LE CF3 0LF CF3 0LG CF3 0LH CF3 0LJ CF3 0LL CF3 0LN CF3 0LP CF3 0LQ CF3 0LR CF3 0LS CF3 0LT CF3 0LU CF3 0LW CF3 0LX CF3 0LY CF3 0LZ CF3 0NA CF3 0NB CF3 0ND CF3 0NE CF3 0NF CF3 0NG CF3 0NH CF3 0NJ CF3 0NL CF3 0NN CF3 0NP CF3 0NQ CF3 0NR CF3 0NS CF3 0NT CF3 0NU CF3 0NW CF3 0NX CF3 0NY CF3 0NZ CF3 0PA CF3 0PB CF3 0PD CF3 0PE CF3 0PF CF3 0PG CF3 0PH CF3 0PJ CF3 0PL CF3 0PN CF3 0PP CF3 0PQ CF3 0PR CF3 0PS CF3 0PT CF3 0PU CF3 0PW CF3 0PX CF3 0PY CF3 0PZ CF3 0QA CF3 0QB CF3 0QD CF3 0RA CF3 0RB CF3 0RD CF3 0RE CF3 0RF CF3 0RG CF3 0RH CF3 0RJ CF3 0RL CF3 0RN CF3 0RP CF3 0RQ CF3 0SA CF3 0SB CF3 0SD CF3 0SE CF3 0SF CF3 0SG CF3 0SH CF3 0ST CF3 0UG CF3 0UH CF3 0UJ CF3 0XU

All CF3 1 postcodes (87)

All CF3 2 postcodes (103)

All CF3 3 postcodes (152)

CF3 3AA CF3 3AB CF3 3AD CF3 3AE CF3 3AF CF3 3AG CF3 3AH CF3 3AJ CF3 3AL CF3 3AN CF3 3AP CF3 3AQ CF3 3AR CF3 3AS CF3 3AT CF3 3AU CF3 3AW CF3 3AX CF3 3AY CF3 3AZ CF3 3BA CF3 3BB CF3 3BD CF3 3BE CF3 3BF CF3 3BG CF3 3BH CF3 3BJ CF3 3BL CF3 3BN CF3 3BP CF3 3BQ CF3 3BR CF3 3BS CF3 3BT CF3 3BU CF3 3BW CF3 3BX CF3 3BY CF3 3BZ CF3 3DB CF3 3DD CF3 3DE CF3 3DJ CF3 3DL CF3 3DN CF3 3DP CF3 3DQ CF3 3DR CF3 3DS CF3 3EA CF3 3EB CF3 3EE CF3 3EF CF3 3EG CF3 3EP CF3 3ET CF3 3HA CF3 3HB CF3 3HD CF3 3HE CF3 3HF CF3 3HG CF3 3HH CF3 3HJ CF3 3HL CF3 3HN CF3 3HP CF3 3HQ CF3 3HR CF3 3HS CF3 3HT CF3 3HU CF3 3HW CF3 3HX CF3 3HY CF3 3HZ CF3 3JA CF3 3JB CF3 3JD CF3 3JE CF3 3JF CF3 3JG CF3 3JH CF3 3JJ CF3 3JL CF3 3JN CF3 3JP CF3 3JQ CF3 3JR CF3 3JS CF3 3JT CF3 3JU CF3 3JW CF3 3JX CF3 3JY CF3 3JZ CF3 3LA CF3 3LB CF3 3LD CF3 3LE CF3 3LF CF3 3LG CF3 3LH CF3 3LJ CF3 3LN CF3 3LP CF3 3LQ CF3 3LR CF3 3LS CF3 3LT CF3 3LU CF3 3LW CF3 3LX CF3 3LY CF3 3LZ CF3 3NA CF3 3NB CF3 3ND CF3 3NE CF3 3NF CF3 3NG CF3 3NH CF3 3NJ CF3 3NL CF3 3NN CF3 3NP CF3 3NQ CF3 3NR CF3 3NS CF3 3NT CF3 3NU CF3 3NW CF3 3NX CF3 3NY CF3 3NZ CF3 3PA CF3 3PB CF3 3PD CF3 3PE CF3 3PF CF3 3PG CF3 3PH CF3 3PJ CF3 3PL CF3 3PN CF3 3PP CF3 3PT CF3 3PU CF3 3PW CF3 3PY CF3 3XE

All CF3 4 postcodes (118)

All CF3 5 postcodes (179)

CF3 5AA CF3 5AB CF3 5AD CF3 5BD CF3 5DE CF3 5DF CF3 5DG CF3 5DH CF3 5DJ CF3 5DL CF3 5EA CF3 5ET CF3 5EX CF3 5EY CF3 5EZ CF3 5FX CF3 5HS CF3 5HT CF3 5HU CF3 5HW CF3 5JU CF3 5JW CF3 5JX CF3 5JY CF3 5JZ CF3 5LA CF3 5LH CF3 5LJ CF3 5LL CF3 5LN CF3 5LP CF3 5LQ CF3 5LR CF3 5LS CF3 5LT CF3 5LU CF3 5LW CF3 5LX CF3 5LY CF3 5LZ CF3 5NA CF3 5NB CF3 5ND CF3 5NE CF3 5NF CF3 5NG CF3 5NH CF3 5NJ CF3 5NL CF3 5NN CF3 5NP CF3 5NQ CF3 5NR CF3 5NT CF3 5NU CF3 5NW CF3 5NX CF3 5NY CF3 5NZ CF3 5PA CF3 5PB CF3 5PD CF3 5PE CF3 5PF CF3 5PG CF3 5PH CF3 5PJ CF3 5PL CF3 5PN CF3 5PP CF3 5PQ CF3 5PR CF3 5PS CF3 5PT CF3 5PU CF3 5PW CF3 5PX CF3 5PY CF3 5PZ CF3 5QA CF3 5QB CF3 5QD CF3 5QE CF3 5QF CF3 5QG CF3 5QH CF3 5QJ CF3 5QL CF3 5QN CF3 5QP CF3 5QQ CF3 5QR CF3 5QS CF3 5QT CF3 5QU CF3 5QW CF3 5QX CF3 5QY CF3 5QZ CF3 5RA CF3 5RB CF3 5RD CF3 5RE CF3 5RF CF3 5RG CF3 5RH CF3 5RJ CF3 5RL CF3 5RN CF3 5RP CF3 5RQ CF3 5RR CF3 5RS CF3 5RT CF3 5RU CF3 5RW CF3 5RX CF3 5RY CF3 5RZ CF3 5SA CF3 5SB CF3 5SD CF3 5SE CF3 5SF CF3 5SG CF3 5SH CF3 5SJ CF3 5SL CF3 5SN CF3 5SP CF3 5SR CF3 5ST CF3 5SU CF3 5SW CF3 5SX CF3 5SY CF3 5SZ CF3 5TA CF3 5TB CF3 5TE CF3 5TF CF3 5TG CF3 5TH CF3 5TJ CF3 5TL CF3 5TN CF3 5TP CF3 5TQ CF3 5TR CF3 5TS CF3 5TT CF3 5TU CF3 5TW CF3 5TX CF3 5TY CF3 5TZ CF3 5UA CF3 5UB CF3 5UD CF3 5UE CF3 5UF CF3 5UG CF3 5UH CF3 5UJ CF3 5UL CF3 5UN CF3 5UP CF3 5UQ CF3 5UR CF3 5US CF3 5UT CF3 5UU CF3 5UW CF3 5UX CF3 5UY CF3 5XA CF3 5XB CF3 5XE CF3 5YX

All CF3 6 postcodes (59)

Best deals

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Living in Cardiff

CF3 represents Caerphilly town's core, benefiting from substantial infrastructure investment. Price data is not available here.

Remote worker score

55/100

Connectivity and amenities for home working

Family score

50/100

Schools, safety and family amenities

Value score

50/100

What you get for the local price level

CF3 broadband FAQs

How does CF3 gigabit reach compare to Cambridge?

At 93.4%, it matches CB4, Cambridge's best performer. Caerphilly town centre has world-class infrastructure.

What role does fixed wireless play in CF3?

33.9% of postcodes have access. It's common enough to factor into redundancy planning for critical services.

Is slow broadband a concern in CF3?

No. 0.3% fall below 10 Mbps, negligible. Superfast is virtually guaranteed.

Should I expect identical speeds across CF3?

Not quite. Whilst gigabit covers 93%, the 7% without it usually hit superfast tiers. Check postcodes, but outcomes are reliably fast.

Neighbouring districts

CF23

873 postcodes

98% superfast

CF24

1,021 postcodes

98% superfast

CF14

1,598 postcodes

99% superfast

CF10

566 postcodes

81% superfast

CF99

1 postcodes

0% superfast

NP10

582 postcodes

97% superfast

Check your exact postcode

Every postcode in CF3 has its own page with broadband speeds, house prices, school ratings and crime stats. You can also compare providers for your address.

Data sources: Broadband data from Ofcom Connected Nations 2025 · House prices from HM Land Registry · Crime from Police.uk · See all data sources