LL55 postcode district: Caernarfon and around, Gwynedd

LL55 is a postcode district in Wales, with 741 postcodes in use in 5 sectors. It has postcodes in Caernarfon, Llanberis and Llanrug. Its council is Gwynedd.

Postcodes in use
741
Sectors
5
Council
Gwynedd
Places
3 places

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

Every postcode in LL55, by gigabit broadband

Map of every postcode in LL55, by gigabit broadband Of the 741 postcodes in LL55 that ONS places, 129 have no home or business that can get gigabit, 172 have some that can, 426 can all get it and 14 have no Ofcom figure. 6 groups of postcodes without gigabit are outlined: 30 postcodes without gigabit; 25 postcodes without gigabit; 9 postcodes without gigabit; 7 postcodes without gigabit; 6 postcodes without gigabit; 5 postcodes without gigabit. Places named: Caernarfon, Bethesda, Llanberis, Y Felinheli, Llanrug, Penygroes. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2.5 km. A4085A487A4080A499 LL55 1DZ: no Ofcom figureLL55 3AX: no Ofcom figureLL55 4NQ: no Ofcom figureLL55 1AJ: gigabit for allLL55 1AQ: gigabit for allLL55 1BB: gigabit for allLL55 1BD: gigabit for allLL55 1BJ: gigabit for allLL55 1BL: gigabit for allLL55 1BP: gigabit for allLL55 1BS: gigabit for allLL55 1BT: gigabit for allLL55 1DA: gigabit for allLL55 1DD: gigabit for allLL55 1DF: gigabit for allLL55 1DG: gigabit for allLL55 1DJ: gigabit for allLL55 1DN: gigabit for allLL55 1DX: gigabit for allLL55 1DY: gigabit for allLL55 1EA: gigabit for allLL55 1EB: gigabit for allLL55 1EF: gigabit for allLL55 1EN: gigabit for allLL55 1EY: gigabit for allLL55 1GA: gigabit for allLL55 1HJ: gigabit for allLL55 1HS: gigabit for allLL55 1LF: gigabit for allLL55 1LL: gigabit for allLL55 1LN: gigabit for allLL55 1LP: gigabit for allLL55 1LR: gigabit for allLL55 1LW: gigabit for allLL55 1NA: gigabit for allLL55 1PA: gigabit for allLL55 1PF: gigabit for allLL55 1RE: gigabit for allLL55 1RS: gigabit for allLL55 1TP: gigabit for allLL55 1TT: gigabit for allLL55 1TW: gigabit for allLL55 1TY: gigabit for allLL55 1UB: gigabit for allLL55 1UD: gigabit for allLL55 1UE: gigabit for allLL55 1UH: gigabit for allLL55 1UL: gigabit for allLL55 1UN: gigabit for allLL55 1UP: gigabit for allLL55 1UR: gigabit for allLL55 1UT: gigabit for allLL55 1UU: gigabit for allLL55 1YE: gigabit for allLL55 1YG: gigabit for allLL55 1YU: gigabit for allLL55 2AG: gigabit for allLL55 2AT: gigabit for allLL55 2AX: gigabit for allLL55 2BF: gigabit for allLL55 2BG: gigabit for allLL55 2BJ: gigabit for allLL55 2BL: gigabit for allLL55 2BP: gigabit for allLL55 2BQ: gigabit for allLL55 2DG: gigabit for allLL55 2DH: gigabit for allLL55 2DJ: gigabit for allLL55 2DP: gigabit for allLL55 2DR: gigabit for allLL55 2DU: gigabit for allLL55 2DX: gigabit for allLL55 2ED: gigabit for allLL55 2EE: gigabit for allLL55 2EF: gigabit for allLL55 2EJ: gigabit for allLL55 2EL: gigabit for allLL55 2EP: gigabit for allLL55 2EQ: gigabit for allLL55 2EZ: gigabit for allLL55 2HL: gigabit for allLL55 2HR: gigabit for allLL55 2LN: gigabit for allLL55 2LR: gigabit for allLL55 2LZ: gigabit for allLL55 2RX: gigabit for allLL55 2RZ: gigabit for allLL55 2SE: gigabit for allLL55 2SG: gigabit for allLL55 2SH: gigabit for allLL55 2SN: gigabit for allLL55 2SP: gigabit for allLL55 2SR: gigabit for allLL55 2SW: gigabit for allLL55 2SZ: gigabit for allLL55 2TA: gigabit for allLL55 2TB: gigabit for allLL55 2TD: gigabit for allLL55 2TE: gigabit for allLL55 2TN: gigabit for allLL55 2TY: gigabit for allLL55 2UA: gigabit for allLL55 2UD: gigabit for allLL55 2UF: gigabit for allLL55 2UL: gigabit for allLL55 2UR: gigabit for allLL55 2UW: gigabit for allLL55 2YA: gigabit for allLL55 2YG: gigabit for allLL55 2YL: gigabit for allLL55 2YN: gigabit for allLL55 2YR: gigabit for allLL55 2YS: gigabit for allLL55 2YT: gigabit for allLL55 2YW: gigabit for allLL55 3AB: gigabit for allLL55 3AE: gigabit for allLL55 3AF: gigabit for allLL55 3AG: gigabit for allLL55 3AL: gigabit for allLL55 3AN: gigabit for allLL55 3AY: gigabit for allLL55 3BB: gigabit for allLL55 3DA: gigabit for allLL55 3ES: gigabit for allLL55 3HL: gigabit for allLL55 3HN: gigabit for allLL55 3PB: gigabit for allLL55 3PD: gigabit for allLL55 3PE: gigabit for allLL55 3PS: gigabit for allLL55 4AA: gigabit for allLL55 4AB: gigabit for allLL55 4AD: gigabit for allLL55 4AF: gigabit for allLL55 4AN: gigabit for allLL55 4AP: gigabit for allLL55 4AQ: gigabit for allLL55 4AR: gigabit for allLL55 4AS: gigabit for allLL55 4AT: gigabit for allLL55 4AW: gigabit for allLL55 4AY: gigabit for allLL55 4BA: gigabit for allLL55 4BE: gigabit for allLL55 4BH: gigabit for allLL55 4BN: gigabit for allLL55 4BP: gigabit for allLL55 4DA: gigabit for allLL55 4DB: gigabit for allLL55 4DE: gigabit for allLL55 4DW: gigabit for allLL55 4EA: gigabit for allLL55 4EB: gigabit for allLL55 4ED: gigabit for allLL55 4FF: gigabit for allLL55 4HJ: gigabit for allLL55 4HQ: gigabit for allLL55 4LT: gigabit for allLL55 4NB: gigabit for allLL55 4NF: gigabit for allLL55 4NH: gigabit for allLL55 4NJ: gigabit for allLL55 4NS: gigabit for allLL55 4PS: gigabit for allLL55 4PU: gigabit for allLL55 4RA: gigabit for allLL55 4RE: gigabit for allLL55 4RF: gigabit for allLL55 4RL: gigabit for allLL55 4RR: gigabit for allLL55 4RS: gigabit for allLL55 4RU: gigabit for allLL55 4SW: gigabit for allLL55 4TD: gigabit for allLL55 4TE: gigabit for allLL55 4TG: gigabit for allLL55 4TL: gigabit for allLL55 4TR: gigabit for allLL55 4TT: gigabit for allLL55 4UD: gigabit for allLL55 4UG: gigabit for allLL55 4UH: gigabit for allLL55 4UR: gigabit for allLL55 4YA: gigabit for allLL55 4YE: gigabit for allLL55 4YF: gigabit for allLL55 4YL: gigabit for allLL55 1AB: some gigabitLL55 1BA: some gigabitLL55 1BE: some gigabitLL55 1DQ: some gigabitLL55 1LS: some gigabitLL55 1SG: some gigabitLL55 1SR: some gigabitLL55 1TS: some gigabitLL55 1UA: some gigabitLL55 1YD: some gigabitLL55 2AE: some gigabitLL55 2AJ: some gigabitLL55 2AQ: some gigabitLL55 2BB: some gigabitLL55 2BD: some gigabitLL55 2BS: some gigabitLL55 2BW: some gigabitLL55 2DF: some gigabitLL55 2HS: some gigabitLL55 2LJ: some gigabitLL55 2LY: some gigabitLL55 2SL: some gigabitLL55 2SS: some gigabitLL55 2ST: some gigabitLL55 2SY: some gigabitLL55 2TF: some gigabitLL55 2TG: some gigabitLL55 2TL: some gigabitLL55 2UB: some gigabitLL55 2YD: some gigabitLL55 2YF: some gigabitLL55 3AP: some gigabitLL55 3AR: some gigabitLL55 3AS: some gigabitLL55 3BE: some gigabitLL55 3BY: some gigabitLL55 3DB: some gigabitLL55 3DD: some gigabitLL55 3DE: some gigabitLL55 3ED: some gigabitLL55 3EE: some gigabitLL55 3EF: some gigabitLL55 3EG: some gigabitLL55 3EH: some gigabitLL55 3EL: some gigabitLL55 3EN: some gigabitLL55 3ER: some gigabitLL55 3ET: some gigabitLL55 3EW: some gigabitLL55 3EY: some gigabitLL55 3HA: some gigabitLL55 3HB: some gigabitLL55 3HD: some gigabitLL55 3HH: some gigabitLL55 3LU: some gigabitLL55 3LY: some gigabitLL55 3NA: some gigabitLL55 3NB: some gigabitLL55 3ND: some gigabitLL55 3NG: some gigabitLL55 3NH: some gigabitLL55 4AG: some gigabitLL55 4AL: some gigabitLL55 4AX: some gigabitLL55 4BX: some gigabitLL55 4DD: some gigabitLL55 4DL: some gigabitLL55 4DU: some gigabitLL55 4DY: some gigabitLL55 4EE: some gigabitLL55 4EG: some gigabitLL55 4EL: some gigabitLL55 4EX: some gigabitLL55 4EZ: some gigabitLL55 4HA: some gigabitLL55 4HB: some gigabitLL55 4HP: some gigabitLL55 4HX: some gigabitLL55 4LF: some gigabitLL55 4LQ: some gigabitLL55 4NE: some gigabitLL55 4NG: some gigabitLL55 4NL: some gigabitLL55 4NW: some gigabitLL55 4PY: some gigabitLL55 4RG: some gigabitLL55 4RN: some gigabitLL55 4RT: some gigabitLL55 4RY: some gigabitLL55 4SB: some gigabitLL55 4SD: some gigabitLL55 4SH: some gigabitLL55 4SR: some gigabitLL55 4TA: some gigabitLL55 4TF: some gigabitLL55 4TH: some gigabitLL55 4TY: some gigabitLL55 4UB: some gigabitLL55 4UL: some gigabitLL55 4UN: some gigabitLL55 4UU: some gigabitLL55 4UW: some gigabitLL55 4UY: some gigabitLL55 4YG: some gigabitLL55 4YH: some gigabitLL55 4YN: some gigabitLL55 4YS: some gigabitLL55 4YW: some gigabitLL55 1DU: some gigabitLL55 1ET: some gigabitLL55 2DE: some gigabitLL55 1SW: some gigabitLL55 1YB: some gigabitLL55 2LW: some gigabitLL55 2PB: some gigabitLL55 2PT: some gigabitLL55 2LH: some gigabitLL55 2TW: some gigabitLL55 2RP: some gigabitLL55 3NE: some gigabitLL55 4DT: some gigabitLL55 4NY: some gigabitLL55 4PT: some gigabitLL55 4RH: some gigabitLL55 4RW: some gigabitLL55 4UF: some gigabitLL55 1AZ: no gigabitLL55 1BQ: no gigabitLL55 1BZ: no gigabitLL55 1SQ: no gigabitLL55 1TU: no gigabitLL55 2FA: no gigabitLL55 2YE: no gigabitLL55 2YU: no gigabitLL55 3AD: no gigabitLL55 3AJ: no gigabitLL55 3AW: no gigabitLL55 3BA: no gigabitLL55 3BD: no gigabitLL55 3BL: no gigabitLL55 3BP: no gigabitLL55 3BS: no gigabitLL55 3BT: no gigabitLL55 3BW: no gigabitLL55 3DF: no gigabitLL55 3DH: no gigabitLL55 3DL: no gigabitLL55 3DR: no gigabitLL55 3DT: no gigabitLL55 3DU: no gigabitLL55 3EB: no gigabitLL55 3EP: no gigabitLL55 3HG: no gigabitLL55 3LN: no gigabitLL55 3LT: no gigabitLL55 3NF: no gigabitLL55 3NP: no gigabitLL55 3NS: no gigabitLL55 3PA: no gigabitLL55 3PF: no gigabitLL55 3PG: no gigabitLL55 3PH: no gigabitLL55 3PL: no gigabitLL55 3PN: no gigabitLL55 3PP: no gigabitLL55 3PR: no gigabitLL55 3PW: no gigabitLL55 4AJ: no gigabitLL55 4AZ: no gigabitLL55 4BF: no gigabitLL55 4BJ: no gigabitLL55 4BQ: no gigabitLL55 4BY: no gigabitLL55 4BZ: no gigabitLL55 4DJ: no gigabitLL55 4DX: no gigabitLL55 4DZ: no gigabitLL55 4EF: no gigabitLL55 4EH: no gigabitLL55 4EJ: no gigabitLL55 4EQ: no gigabitLL55 4HS: no gigabitLL55 4LJ: no gigabitLL55 4LX: no gigabitLL55 4LZ: no gigabitLL55 4NR: no gigabitLL55 4PQ: no gigabitLL55 4PX: no gigabitLL55 4RB: no gigabitLL55 4SA: no gigabitLL55 4SS: no gigabitLL55 4YP: no gigabitLL55 4YR: no gigabitLL55 4YU: no gigabitLL55 1EQ: no gigabitLL55 1AY: no gigabitLL55 1ED: no gigabitLL55 2NP: no gigabitLL55 1TA: no gigabitLL55 4BU: no gigabitLL55 3HU: no gigabitLL55 3LR: no gigabitLL55 3NT: no gigabitLL55 4DG: no gigabitLL55 4LG: no gigabitLL55 4GA: no gigabitLL55 4HT: no gigabit CaernarfonBethesdaLlanberisY FelinheliLlanrugPenygroes 30 postcodes without gigabit, outlined: this goes to LL55 4ET, the one nearest the middle of them30 postcodes without gigabit25 postcodes without gigabit, outlined: this goes to LL55 3EJ, the one nearest the middle of them25 postcodes without gigabit9 postcodes without gigabit, outlined: this goes to LL55 4LX, the one nearest the middle of them9 postcodes without gigabit6 postcodes without gigabit, outlined: this goes to LL55 4PZ, the one nearest the middle of them6 postcodes without gigabit5 postcodes without gigabit, outlined: this goes to LL55 3HE, the one nearest the middle of them5 postcodes without gigabit Map of every postcode in LL55, by gigabit broadband Of the 741 postcodes in LL55 that ONS places, 129 have no home or business that can get gigabit, 172 have some that can, 426 can all get it and 14 have no Ofcom figure. 6 groups of postcodes without gigabit are outlined: 30 postcodes without gigabit; 25 postcodes without gigabit; 9 postcodes without gigabit; 7 postcodes without gigabit; 6 postcodes without gigabit; 5 postcodes without gigabit. Places named: Caernarfon, Bethesda, Llanberis, Y Felinheli. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 5 km. A4085 CaernarfonBethesdaLlanberisY Felinheli 30 postcodes without gigabit, outlined: this goes to LL55 4ET, the one nearest the middle of them30 postcodes without gigabit25 postcodes without gigabit, outlined: this goes to LL55 3EJ, the one nearest the middle of them25 postcodes without gigabit
  • No home or business can get gigabit: 129
  • Some can get gigabit: 172
  • Every home and business can get gigabit: 426
  • Ofcom gives no figure: 14
  • Outline: where 5 or more postcodes without gigabit lie together

Of the 741 postcodes in LL55 that ONS places, 129 have no home or business that can get gigabit, 172 have some that can, 426 can all get it and 14 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 160 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 53.1341, longitude -4.2040. 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

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

LL55 1AYLL55 1AZLL55 1BQLL55 1BZLL55 1EDLL55 1EQLL55 1SQLL55 1SSLL55 1TALL55 1THLL55 1TULL55 2FA

Where the postcodes without gigabit lie together

  • 30 postcodes without gigabit, outlined on the map. LL55 4ET, is the one nearest the middle of them.
  • 25 postcodes without gigabit, outlined on the map. LL55 3EJ, is the one nearest the middle of them.
  • 9 postcodes without gigabit, outlined on the map. LL55 4LX, is the one nearest the middle of them.
  • 7 postcodes without gigabit, outlined on the map. LL55 1TA, is the one nearest the middle of them.
  • 6 postcodes without gigabit, outlined on the map. LL55 4PZ, is the one nearest the middle of them.
  • 5 postcodes without gigabit, outlined on the map. LL55 3HE, is the one nearest the middle of them.

What broadband can you get in LL55?

Ofcom reports on 727 of the 741 postcodes in LL55. At 426 of them every home and business can get gigabit broadband, and at 17 some cannot get decent broadband (10 Mbit/s).

Postcodes where every home can get gigabit426 of 727
Postcodes where every home can get superfast594 of 727
Postcodes where some cannot get decent broadband17 of 727

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 LL55?

Homes in LL55 sold for a typical £210,000 in the 12 months to August 2026, across 193 sales, up 2.4% on the 12 months before, HM Land Registry's figures show.

£210,000 typical price, the 12 months to August 2026
£205,000 12 months to August 2025
▲ up 2.4% on the 12 months before
  • Detached £330,000 49 sales
  • Semi-detached £223,250 58 sales
  • Terraced £162,000 85 sales
  • Flat or maisonette 1 sale, too few to price

Each bar is that kind's typical price, against the most expensive kind here.

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 LL55

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

LL55 1175 postcodesLL55 2195 postcodesLL55 3123 postcodesLL55 4240 postcodesLL55 98 postcodes
UK postcode format explained

Places in LL55

Towns and villages with postcodes in LL55, and how many each has here.

Caernarfon postcodes,284Llanberis postcodes,68Llanrug postcodes,50

Who covers LL55

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

  • Dwyfor Meirionnydd741

Police force areas

  • North Wales741

Next to LL55

LL54 postcode district LL56 postcode district All LL districts Caernarfon postcodes

"Next to" is by number: the districts before and after LL55 in the LL area.

Check a postcode

Something wrong on this page? Report an error and we will check it against the source.