KA18 3 postcode sector in the KA18 district

KA18 3 is a sector of the KA18 district: every postcode that starts KA18 3. It has 192 postcodes in use, 3 of them large-user postcodes. A large-user postcode is one Royal Mail gives to a single address that gets a lot of mail.

Not sure what a sector is? UK postcode format explained.

Every postcode in the KA18 3 sector, and which are new since 2020

Map of every postcode in the KA18 3 sector, by new since 2020 Of the 192 postcodes in the KA18 3 sector that ONS places, 4 are new since 2020 and 188 were in use before 2020. Places named: Cumnock, Muirkirk. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2.5 km. A76 KA18 3AA: before 2020KA18 3AD: before 2020KA18 3AE: before 2020KA18 3AF: before 2020KA18 3AH: before 2020KA18 3AJ: before 2020KA18 3AN: before 2020KA18 3AP: before 2020KA18 3AQ: before 2020KA18 3AR: before 2020KA18 3AS: before 2020KA18 3AU: before 2020KA18 3AX: before 2020KA18 3AY: before 2020KA18 3AZ: before 2020KA18 3BD: before 2020KA18 3BG: before 2020KA18 3BN: before 2020KA18 3BP: before 2020KA18 3BS: before 2020KA18 3BT: before 2020KA18 3BX: before 2020KA18 3BY: before 2020KA18 3DB: before 2020KA18 3DE: before 2020KA18 3DH: before 2020KA18 3DJ: before 2020KA18 3EB: before 2020KA18 3EJ: before 2020KA18 3EL: before 2020KA18 3EQ: before 2020KA18 3ES: before 2020KA18 3EU: before 2020KA18 3EX: before 2020KA18 3EZ: before 2020KA18 3HA: before 2020KA18 3HB: before 2020KA18 3HD: before 2020KA18 3HF: before 2020KA18 3HG: before 2020KA18 3HH: before 2020KA18 3HP: before 2020KA18 3HS: before 2020KA18 3HU: before 2020KA18 3HX: before 2020KA18 3HY: before 2020KA18 3HZ: before 2020KA18 3JA: before 2020KA18 3JB: before 2020KA18 3JG: before 2020KA18 3JJ: before 2020KA18 3JL: before 2020KA18 3JN: before 2020KA18 3JP: before 2020KA18 3JR: before 2020KA18 3JW: before 2020KA18 3LA: before 2020KA18 3LB: before 2020KA18 3LD: before 2020KA18 3LE: before 2020KA18 3LH: before 2020KA18 3LJ: before 2020KA18 3LL: before 2020KA18 3LN: before 2020KA18 3LP: before 2020KA18 3LR: before 2020KA18 3LS: before 2020KA18 3LT: before 2020KA18 3LU: before 2020KA18 3LW: before 2020KA18 3NA: before 2020KA18 3NB: before 2020KA18 3ND: before 2020KA18 3NE: before 2020KA18 3NF: before 2020KA18 3NG: before 2020KA18 3NH: before 2020KA18 3NJ: before 2020KA18 3NL: before 2020KA18 3NN: before 2020KA18 3NQ: before 2020KA18 3NU: before 2020KA18 3NW: before 2020KA18 3NX: before 2020KA18 3PG: before 2020KA18 3PJ: before 2020KA18 3PN: before 2020KA18 3PP: before 2020KA18 3PR: before 2020KA18 3PS: before 2020KA18 3PX: before 2020KA18 3QA: before 2020KA18 3QE: before 2020KA18 3QF: before 2020KA18 3QP: before 2020KA18 3QQ: before 2020KA18 3QS: before 2020KA18 3QW: before 2020KA18 3QX: before 2020KA18 3QY: before 2020KA18 3QZ: before 2020KA18 3RA: before 2020KA18 3RE: before 2020KA18 3RF: before 2020KA18 3RJ: before 2020KA18 3RN: before 2020KA18 3RP: before 2020KA18 3RU: before 2020KA18 3RZ: before 2020KA18 3SA: before 2020KA18 3SB: before 2020KA18 3SD: before 2020KA18 3EP: new since 2020KA18 3ER: new since 2020KA18 3ET: new since 2020KA18 3JD: new since 2020 CumnockMuirkirk Map of every postcode in the KA18 3 sector, by new since 2020 Of the 192 postcodes in the KA18 3 sector that ONS places, 4 are new since 2020 and 188 were in use before 2020. Places named: Cumnock, Muirkirk. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 5 km. CumnockMuirkirk
  • New since 2020: 4
  • In use before 2020: 188

Of the 192 postcodes in the KA18 3 sector that ONS places, 4 are new since 2020 and 188 were in use before 2020.

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. New since 2020 means it came into use in January 2020 or later. No boundary is drawn. Where marks overlap, the one first in the key is drawn; the counts include every postcode.

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026, the centre point of each postcode; when each came into use: the same directory; 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

The 4 newest postcodes

KA18 3JDMay 2025KA18 3ETMarch 2025KA18 3EPJune 2024KA18 3ERDecember 2021

Postcodes in KA18 3

Pick a postcode to see its council and MP, broadband, flood risk, what homes sell for, council tax, the nearest schools and stations, and crime around it.

KA18 3AAKA18 3ABKA18 3ADKA18 3AEKA18 3AFKA18 3AGKA18 3AHKA18 3AJKA18 3ANKA18 3APKA18 3AQKA18 3ARKA18 3ASKA18 3ATKA18 3AUKA18 3AWKA18 3AXKA18 3AYKA18 3AZKA18 3BAKA18 3BBKA18 3BDKA18 3BEKA18 3BGKA18 3BHKA18 3BJKA18 3BLKA18 3BNKA18 3BPKA18 3BQKA18 3BSKA18 3BTKA18 3BUKA18 3BXKA18 3BYKA18 3BZKA18 3DBKA18 3DDKA18 3DEKA18 3DFKA18 3DGKA18 3DHKA18 3DJKA18 3DLKA18 3DNKA18 3DPKA18 3DQKA18 3DRKA18 3DSKA18 3DTKA18 3DUKA18 3DWKA18 3DXKA18 3DYKA18 3DZKA18 3EAKA18 3EBKA18 3EDKA18 3EEKA18 3EFKA18 3EGKA18 3EHKA18 3EJKA18 3ELKA18 3ENKA18 3EPKA18 3EQKA18 3ERKA18 3ESKA18 3ETKA18 3EUKA18 3EXKA18 3EYKA18 3EZKA18 3GAKA18 3HAKA18 3HBKA18 3HDKA18 3HEKA18 3HFKA18 3HGKA18 3HHKA18 3HJKA18 3HLKA18 3HNKA18 3HPKA18 3HQKA18 3HRKA18 3HSKA18 3HTKA18 3HUKA18 3HWKA18 3HXKA18 3HYKA18 3HZKA18 3JAKA18 3JBKA18 3JDKA18 3JGKA18 3JJKA18 3JLKA18 3JNKA18 3JPKA18 3JRKA18 3JWKA18 3LAKA18 3LBKA18 3LDKA18 3LEKA18 3LGKA18 3LHKA18 3LJKA18 3LLKA18 3LNKA18 3LPKA18 3LRKA18 3LSKA18 3LTKA18 3LUKA18 3LWKA18 3NAKA18 3NBKA18 3NDKA18 3NEKA18 3NFKA18 3NGKA18 3NHKA18 3NJKA18 3NLKA18 3NNKA18 3NQKA18 3NUKA18 3NWKA18 3NXKA18 3PAKA18 3PBKA18 3PFKA18 3PGKA18 3PHKA18 3PJKA18 3PLKA18 3PNKA18 3PPKA18 3PQKA18 3PRKA18 3PSKA18 3PTKA18 3PUKA18 3PWKA18 3PXKA18 3PYKA18 3PZKA18 3QAKA18 3QBKA18 3QDKA18 3QEKA18 3QFKA18 3QGKA18 3QPKA18 3QQKA18 3QRKA18 3QSKA18 3QTKA18 3QUKA18 3QWKA18 3QXKA18 3QYKA18 3QZKA18 3RAKA18 3RBKA18 3RDKA18 3REKA18 3RFKA18 3RGKA18 3RHKA18 3RJKA18 3RLKA18 3RNKA18 3RPKA18 3RQKA18 3RRKA18 3RSKA18 3RTKA18 3RUKA18 3RWKA18 3RXKA18 3RYKA18 3RZKA18 3SAKA18 3SBKA18 3SDKA18 3TA

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026. Postcodes that have ended are not listed. See all our data sources

What council am I in? The council, borough or local authority for a postcode, and the county council where there is one. What ward am I in? The ward for a postcode, with its council, constituency and parish.

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