SY18 postcode district: Llanidloes and around, Powys

SY18 is a postcode district in Wales, with 226 postcodes in use in 2 sectors. It has postcodes in Llanidloes. Its council is Powys. ONS gives no location for 1 of its postcodes, and so no council.

Postcodes in use
226
Sectors
2
Council
Powys
Places
Llanidloes

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026. See all our data sources

Every postcode in SY18, by gigabit broadband

Map of every postcode in SY18, by gigabit broadband Of the 225 postcodes in SY18 that ONS places, 52 have no home or business that can get gigabit, 44 have some that can, 124 can all get it and 5 have no Ofcom figure. One group of postcodes without gigabit is outlined: 6 postcodes without gigabit. Places named: Llanidloes. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2.5 km. SY18 6FF: no Ofcom figureSY18 6LX: no Ofcom figureSY18 6PA: no Ofcom figureSY18 6AJ: gigabit for allSY18 6AL: gigabit for allSY18 6AQ: gigabit for allSY18 6AR: gigabit for allSY18 6AX: gigabit for allSY18 6AZ: gigabit for allSY18 6BA: gigabit for allSY18 6BB: gigabit for allSY18 6BF: gigabit for allSY18 6BG: gigabit for allSY18 6BJ: gigabit for allSY18 6BQ: gigabit for allSY18 6BU: gigabit for allSY18 6DD: gigabit for allSY18 6DG: gigabit for allSY18 6DH: gigabit for allSY18 6DN: gigabit for allSY18 6DP: gigabit for allSY18 6DQ: gigabit for allSY18 6DT: gigabit for allSY18 6DU: gigabit for allSY18 6DW: gigabit for allSY18 6EN: gigabit for allSY18 6ET: gigabit for allSY18 6EU: gigabit for allSY18 6FD: gigabit for allSY18 6HB: gigabit for allSY18 6HP: gigabit for allSY18 6HT: gigabit for allSY18 6HU: gigabit for allSY18 6HW: gigabit for allSY18 6HY: gigabit for allSY18 6HZ: gigabit for allSY18 6JA: gigabit for allSY18 6JB: gigabit for allSY18 6JD: gigabit for allSY18 6JH: gigabit for allSY18 6JJ: gigabit for allSY18 6JL: gigabit for allSY18 6JP: gigabit for allSY18 6JQ: gigabit for allSY18 6JZ: gigabit for allSY18 6LA: gigabit for allSY18 6LE: gigabit for allSY18 6LQ: gigabit for allSY18 6LU: gigabit for allSY18 6LW: gigabit for allSY18 6NA: gigabit for allSY18 6NB: gigabit for allSY18 6ND: gigabit for allSY18 6NE: gigabit for allSY18 6NF: gigabit for allSY18 6NQ: gigabit for allSY18 6NW: gigabit for allSY18 6PG: gigabit for allSY18 6PH: gigabit for allSY18 6PL: gigabit for allSY18 6PQ: gigabit for allSY18 6QA: gigabit for allSY18 6QB: gigabit for allSY18 6QL: gigabit for allSY18 6QN: gigabit for allSY18 6RA: gigabit for allSY18 6RB: gigabit for allSY18 6RF: gigabit for allSY18 6RG: gigabit for allSY18 6RQ: gigabit for allSY18 6YR: gigabit for allSY18 6JE: gigabit for allSY18 6AA: some gigabitSY18 6AD: some gigabitSY18 6AS: some gigabitSY18 6AT: some gigabitSY18 6ES: some gigabitSY18 6EX: some gigabitSY18 6FE: some gigabitSY18 6HA: some gigabitSY18 6HL: some gigabitSY18 6HR: some gigabitSY18 6JN: some gigabitSY18 6JR: some gigabitSY18 6LG: some gigabitSY18 6LH: some gigabitSY18 6LJ: some gigabitSY18 6LL: some gigabitSY18 6LN: some gigabitSY18 6LP: some gigabitSY18 6LT: some gigabitSY18 6NG: some gigabitSY18 6NL: some gigabitSY18 6NN: some gigabitSY18 6NP: some gigabitSY18 6NU: some gigabitSY18 6NX: some gigabitSY18 6NZ: some gigabitSY18 6PJ: some gigabitSY18 6PN: some gigabitSY18 6PW: some gigabitSY18 6QD: some gigabitSY18 6QJ: some gigabitSY18 6QQ: some gigabitSY18 6QX: some gigabitSY18 6RE: some gigabitSY18 6BE: some gigabitSY18 6DF: some gigabitSY18 6EJ: some gigabitSY18 6LD: some gigabitSY18 6HJ: some gigabitSY18 6HN: some gigabitSY18 6JS: no gigabitSY18 6JT: no gigabitSY18 6JU: no gigabitSY18 6JW: no gigabitSY18 6JX: no gigabitSY18 6JY: no gigabitSY18 6LR: no gigabitSY18 6LS: no gigabitSY18 6NH: no gigabitSY18 6NJ: no gigabitSY18 6NR: no gigabitSY18 6NS: no gigabitSY18 6NT: no gigabitSY18 6NY: no gigabitSY18 6PP: no gigabitSY18 6PR: no gigabitSY18 6PS: no gigabitSY18 6PT: no gigabitSY18 6QE: no gigabitSY18 6QF: no gigabitSY18 6QG: no gigabitSY18 6QH: no gigabitSY18 6QT: no gigabitSY18 6QU: no gigabitSY18 6QY: no gigabitSY18 6RJ: no gigabitSY18 6RL: no gigabitSY18 6RN: no gigabitSY18 6RP: no gigabitSY18 6RR: no gigabitSY18 6RS: no gigabitSY18 6RT: no gigabitSY18 6RU: no gigabitSY18 6RX: no gigabitSY18 6RY: no gigabitSY18 6RZ: no gigabitSY18 6SA: no gigabitSY18 6SB: no gigabitSY18 6SJ: no gigabitSY18 6SL: no gigabitSY18 6SN: no gigabitSY18 6SQ: no gigabitSY18 6SU: no gigabitSY18 6SW: no gigabitSY18 6SX: no gigabitSY18 6SY: no gigabitSY18 6SZ: no gigabitSY18 6TA: no gigabitSY18 6QP: no gigabitSY18 6SG: no gigabit Llanidloes 6 postcodes without gigabit, outlined: this goes to SY18 6SQ, the one nearest the middle of them6 postcodes without gigabit Map of every postcode in SY18, by gigabit broadband Of the 225 postcodes in SY18 that ONS places, 52 have no home or business that can get gigabit, 44 have some that can, 124 can all get it and 5 have no Ofcom figure. One group of postcodes without gigabit is outlined: 6 postcodes without gigabit. Places named: Llanidloes. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2.5 km. Llanidloes 6 postcodes without gigabit, outlined: this goes to SY18 6SQ, the one nearest the middle of them6 postcodes without gigabit
  • No home or business can get gigabit: 52
  • Some can get gigabit: 44
  • Every home and business can get gigabit: 124
  • Ofcom gives no figure: 5
  • Outline: where 5 or more postcodes without gigabit lie together

Of the 225 postcodes in SY18 that ONS places, 52 have no home or business that can get gigabit, 44 have some that can, 124 can all get it and 5 have no Ofcom figure.

Each mark is a postcode's centre point as ONS gives it, not a building. Press one to see its postcode and open its page. A dashed outline shows where 5 or more lie within 250 metres of each other. It is not a boundary, and no boundary is drawn. Where marks overlap, the one first in the key is drawn; the counts include every postcode.

The middle of its postcodes: latitude 52.4418, longitude -3.5493. Open this area on OpenStreetMap

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026, the centre point of each postcode; gigabit: Ofcom, Connected Nations, Spring 2026; roads, rivers and built-up areas: Contains OS data © Crown copyright and database right 2026. Drawn by us. Street map: Ordnance Survey, OS Open Zoomstack, Open Government Licence v3.0, drawn with MapLibre. How we use them

Postcodes without gigabit

52 postcodes here have no gigabit. These are the 12 first in postcode order.

SY18 6JSSY18 6JTSY18 6JUSY18 6JWSY18 6JXSY18 6JYSY18 6LRSY18 6LSSY18 6NHSY18 6NJSY18 6NRSY18 6NS

Where the postcodes without gigabit lie together

  • 6 postcodes without gigabit, outlined on the map. SY18 6SQ, is the one nearest the middle of them.

What broadband can you get in SY18?

Ofcom reports on 220 of the 226 postcodes in SY18. At 124 of them every home and business can get gigabit broadband, and at 33 some cannot get decent broadband (10 Mbit/s).

Postcodes where every home can get gigabit124 of 220
Postcodes where every home can get superfast144 of 220
Postcodes where some cannot get decent broadband33 of 220

Ofcom gives each postcode's share of homes and businesses, not how many there are, so these count postcodes. Each postcode page has its own figures. A provider's checker answers for one address.

Check one address on Ofcom's checker

Source: Ofcom, Connected Nations, Spring 2026, data for January 2026, Open Government Licence v3.0. How we use it

What do homes sell for in SY18?

Homes in SY18 sold for a typical £205,000 in the 12 months to August 2026, across 36 sales, down 6.1% on the 12 months before, HM Land Registry's figures show.

£205,000 typical price, the 12 months to August 2026
12 months to August 2025
£218,250
12 months to August 2026
£205,000

▼ down 6.1% on the 12 months before

Detached£360,000 15 sales
Semi-detached£245,000 7 sales
Terraced£161,500 12 sales
Flat or maisonette 2 sales, too few to price

Standard sales of homes at market value. A typical price is the median, the middle sale. Sales take weeks to be registered, so the last month or two are incomplete. Each postcode page gives the figure for its own postcode sector.

Source: HM Land Registry Price Paid Data, files dated 28 September 2026. Contains HM Land Registry data © Crown copyright and database right 2021. This data is licensed under the Open Government Licence v3.0. How we use it

Postcodes in SY18

Pick a sector, then a postcode. A sector is the district plus the next digit.

SY18 6225 postcodesSY18 91 postcode
UK postcode format explained

Places in SY18

Towns and villages with postcodes in SY18, and how many each has here.

Llanidloes postcodes,117

Who covers SY18

How many of the district's postcodes in use fall under each council, constituency and police force area.

Councils

What council am I in?

Constituencies

  • Montgomeryshire and Glyndwr221
  • Brecon, Radnor and Cwm Tawe4

Police force areas

  • Dyfed-Powys225

Next to SY18

SY17 postcode district SY19 postcode district All SY districts Llanidloes postcodes

"Next to" is by number: the districts before and after SY18 in the SY area.

Check a postcode

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