CO1 1 postcode sector in the CO1 district

CO1 1 is a sector of the CO1 district: every postcode that starts CO1 1. It has 234 postcodes in use, 28 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 CO1 1 sector, by gigabit broadband

Map of every postcode in the CO1 1 sector, by gigabit broadband Of the 234 postcodes in the CO1 1 sector that ONS places, 72 have no home or business that can get gigabit, 64 have some that can, 88 can all get it and 10 have no Ofcom figure. 2 groups of postcodes without gigabit are outlined: 62 postcodes without gigabit; 5 postcodes without gigabit. Places named: Colchester. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. A134 CO1 1PJ: no Ofcom figureCO1 1QY: no Ofcom figureCO1 1RJ: no Ofcom figureCO1 1TJ: no Ofcom figureCO1 1AH: gigabit for allCO1 1AQ: gigabit for allCO1 1AT: gigabit for allCO1 1BG: gigabit for allCO1 1BQ: gigabit for allCO1 1BY: gigabit for allCO1 1DS: gigabit for allCO1 1EQ: gigabit for allCO1 1ES: gigabit for allCO1 1EY: gigabit for allCO1 1EZ: gigabit for allCO1 1FB: gigabit for allCO1 1FF: gigabit for allCO1 1FW: gigabit for allCO1 1GP: gigabit for allCO1 1GX: gigabit for allCO1 1GY: gigabit for allCO1 1HB: gigabit for allCO1 1HF: gigabit for allCO1 1HG: gigabit for allCO1 1HR: gigabit for allCO1 1HS: gigabit for allCO1 1HU: gigabit for allCO1 1JB: gigabit for allCO1 1JX: gigabit for allCO1 1LY: gigabit for allCO1 1NG: gigabit for allCO1 1NJ: gigabit for allCO1 1NQ: gigabit for allCO1 1QD: gigabit for allCO1 1QE: gigabit for allCO1 1QG: gigabit for allCO1 1QH: gigabit for allCO1 1QJ: gigabit for allCO1 1QP: gigabit for allCO1 1QW: gigabit for allCO1 1QX: gigabit for allCO1 1RL: gigabit for allCO1 1RP: gigabit for allCO1 1RR: gigabit for allCO1 1RS: gigabit for allCO1 1RT: gigabit for allCO1 1RU: gigabit for allCO1 1RX: gigabit for allCO1 1RY: gigabit for allCO1 1RZ: gigabit for allCO1 1SA: gigabit for allCO1 1SE: gigabit for allCO1 1SF: gigabit for allCO1 1SG: gigabit for allCO1 1SH: gigabit for allCO1 1SJ: gigabit for allCO1 1SN: gigabit for allCO1 1SQ: gigabit for allCO1 1TW: gigabit for allCO1 1UA: gigabit for allCO1 1UL: gigabit for allCO1 1UP: gigabit for allCO1 1US: gigabit for allCO1 1UT: gigabit for allCO1 1UU: gigabit for allCO1 1UW: gigabit for allCO1 1UZ: gigabit for allCO1 1WN: gigabit for allCO1 1WQ: gigabit for allCO1 1WR: gigabit for allCO1 1WW: gigabit for allCO1 1XA: gigabit for allCO1 1XL: gigabit for allCO1 1XN: gigabit for allCO1 1XP: gigabit for allCO1 1XR: gigabit for allCO1 1XS: gigabit for allCO1 1XT: gigabit for allCO1 1XW: gigabit for allCO1 1XY: gigabit for allCO1 1XZ: gigabit for allCO1 1YA: gigabit for allCO1 1YD: gigabit for allCO1 1YE: gigabit for allCO1 1YF: gigabit for allCO1 1YH: gigabit for allCO1 1ZR: gigabit for allCO1 1ZS: gigabit for allCO1 1ZU: gigabit for allCO1 1ZX: gigabit for allCO1 1ZY: gigabit for allCO1 1AJ: some gigabitCO1 1AP: some gigabitCO1 1AZ: some gigabitCO1 1BX: some gigabitCO1 1DA: some gigabitCO1 1DH: some gigabitCO1 1DN: some gigabitCO1 1DX: some gigabitCO1 1DZ: some gigabitCO1 1EJ: some gigabitCO1 1EL: some gigabitCO1 1EN: some gigabitCO1 1EW: some gigabitCO1 1GD: some gigabitCO1 1HA: some gigabitCO1 1HE: some gigabitCO1 1HJ: some gigabitCO1 1HN: some gigabitCO1 1HP: some gigabitCO1 1HZ: some gigabitCO1 1JG: some gigabitCO1 1JJ: some gigabitCO1 1JN: some gigabitCO1 1LD: some gigabitCO1 1LE: some gigabitCO1 1LF: some gigabitCO1 1LJ: some gigabitCO1 1LN: some gigabitCO1 1LS: some gigabitCO1 1LU: some gigabitCO1 1NS: some gigabitCO1 1NX: some gigabitCO1 1PB: some gigabitCO1 1PX: some gigabitCO1 1PY: some gigabitCO1 1QR: some gigabitCO1 1QS: some gigabitCO1 1QT: some gigabitCO1 1RB: some gigabitCO1 1RE: some gigabitCO1 1RQ: some gigabitCO1 1SB: some gigabitCO1 1SP: some gigabitCO1 1SS: some gigabitCO1 1ST: some gigabitCO1 1SZ: some gigabitCO1 1TH: some gigabitCO1 1TN: some gigabitCO1 1TP: some gigabitCO1 1TS: some gigabitCO1 1TT: some gigabitCO1 1TY: some gigabitCO1 1UB: some gigabitCO1 1UE: some gigabitCO1 1UG: some gigabitCO1 1UN: some gigabitCO1 1UR: some gigabitCO1 1UX: some gigabitCO1 1WB: some gigabitCO1 1XF: some gigabitCO1 1XJ: some gigabitCO1 1XX: some gigabitCO1 1YN: some gigabitCO1 1ZP: some gigabitCO1 1AA: no gigabitCO1 1AG: no gigabitCO1 1AN: no gigabitCO1 1AU: no gigabitCO1 1AW: no gigabitCO1 1BE: no gigabitCO1 1BT: no gigabitCO1 1BZ: no gigabitCO1 1DB: no gigabitCO1 1DF: no gigabitCO1 1DG: no gigabitCO1 1DJ: no gigabitCO1 1DL: no gigabitCO1 1DQ: no gigabitCO1 1DU: no gigabitCO1 1EA: no gigabitCO1 1ED: no gigabitCO1 1EE: no gigabitCO1 1EG: no gigabitCO1 1EH: no gigabitCO1 1EU: no gigabitCO1 1FA: no gigabitCO1 1FQ: no gigabitCO1 1HD: no gigabitCO1 1HL: no gigabitCO1 1HQ: no gigabitCO1 1HW: no gigabitCO1 1JH: no gigabitCO1 1JQ: no gigabitCO1 1JR: no gigabitCO1 1JT: no gigabitCO1 1JW: no gigabitCO1 1JZ: no gigabitCO1 1LB: no gigabitCO1 1LG: no gigabitCO1 1LH: no gigabitCO1 1LQ: no gigabitCO1 1LX: no gigabitCO1 1NF: no gigabitCO1 1NH: no gigabitCO1 1NN: no gigabitCO1 1NP: no gigabitCO1 1NT: no gigabitCO1 1NU: no gigabitCO1 1NY: no gigabitCO1 1NZ: no gigabitCO1 1PA: no gigabitCO1 1PE: no gigabitCO1 1PG: no gigabitCO1 1PN: no gigabitCO1 1PR: no gigabitCO1 1PT: no gigabitCO1 1PW: no gigabitCO1 1RA: no gigabitCO1 1RD: no gigabitCO1 1RH: no gigabitCO1 1RN: no gigabitCO1 1SR: no gigabitCO1 1SU: no gigabitCO1 1TB: no gigabitCO1 1TD: no gigabitCO1 1TL: no gigabitCO1 1UD: no gigabitCO1 1UF: no gigabitCO1 1WD: no gigabitCO1 1WF: no gigabitCO1 1WG: no gigabitCO1 1WJ: no gigabitCO1 1XD: no gigabitCO1 1ZA: no gigabitCO1 1GQ: no gigabit Colchester 62 postcodes without gigabit, outlined: this goes to CO1 1PN, the one nearest the middle of them62 postcodes without gigabit5 postcodes without gigabit, outlined: this goes to CO1 1AN, the one nearest the middle of them5 postcodes without gigabit Map of every postcode in the CO1 1 sector, by gigabit broadband Of the 234 postcodes in the CO1 1 sector that ONS places, 72 have no home or business that can get gigabit, 64 have some that can, 88 can all get it and 10 have no Ofcom figure. 2 groups of postcodes without gigabit are outlined: 62 postcodes without gigabit; 5 postcodes without gigabit. Places named: Colchester. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. Colchester
  • No home or business can get gigabit: 72
  • Some can get gigabit: 64
  • Every home and business can get gigabit: 88
  • Ofcom gives no figure: 10
  • Outline: where 5 or more postcodes without gigabit lie together

Of the 234 postcodes in the CO1 1 sector that ONS places, 72 have no home or business that can get gigabit, 64 have some that can, 88 can all get it and 10 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 150 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.

Sources: ONS Postcode Directory, August 2026, loaded 20 October 2026; Ofcom Connected Nations, Connected Nations, Spring 2026; roads, rivers and built-up areas: Ordnance Survey open maps. 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.

Postcodes without gigabit

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

CO1 1AACO1 1AGCO1 1ANCO1 1AUCO1 1AWCO1 1BECO1 1BTCO1 1BZCO1 1DBCO1 1DFCO1 1DGCO1 1DJ

Where the postcodes without gigabit lie together

  • 62 postcodes without gigabit, outlined on the map. CO1 1PN, is the one nearest the middle of them.
  • 5 postcodes without gigabit, outlined on the map. CO1 1AN, is the one nearest the middle of them.

What do homes sell for in CO1 1?

Homes in CO1 1 sold for a typical £245,000 in the 12 months to September 2026, across 75 sales, HM Land Registry's figures show. The 12 months before gave £249,000 from 104 sales: not a change larger than chance would explain, given which homes happened to sell.

£245,000 typical price, the 12 months to September 2026
£249,000 12 months to September 2025
  • Detached £415,000 5 sales
  • Semi-detached £320,000 9 sales
  • Terraced £270,250 28 sales
  • Flat or maisonette £155,000 33 sales

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

Standard sales of homes at market value at the postcodes that start CO1 1. A typical price is the median, the middle sale, given from 5 sales or more.

How we work this out: house prices by postcode

Source: HM Land Registry Price Paid Data, files dated 28 October 2026.

Postcodes in CO1 1

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.

CO1 1AACO1 1AGCO1 1AHCO1 1AJCO1 1ANCO1 1APCO1 1AQCO1 1ATCO1 1AUCO1 1AWCO1 1AZCO1 1BECO1 1BGCO1 1BQCO1 1BTCO1 1BXCO1 1BYCO1 1BZCO1 1DACO1 1DBCO1 1DFCO1 1DGCO1 1DHCO1 1DJCO1 1DLCO1 1DNCO1 1DQCO1 1DSCO1 1DUCO1 1DXCO1 1DZCO1 1EACO1 1EDCO1 1EECO1 1EGCO1 1EHCO1 1EJCO1 1ELCO1 1ENCO1 1EQCO1 1ESCO1 1EUCO1 1EWCO1 1EYCO1 1EZCO1 1FACO1 1FBCO1 1FFCO1 1FQCO1 1FWCO1 1GDCO1 1GJCO1 1GPCO1 1GQCO1 1GXCO1 1GYCO1 1HACO1 1HBCO1 1HDCO1 1HECO1 1HFCO1 1HGCO1 1HJCO1 1HLCO1 1HNCO1 1HPCO1 1HQCO1 1HRCO1 1HSCO1 1HUCO1 1HWCO1 1HZCO1 1JBCO1 1JGCO1 1JHCO1 1JJCO1 1JNCO1 1JQCO1 1JRCO1 1JSCO1 1JTCO1 1JWCO1 1JXCO1 1JZCO1 1LBCO1 1LDCO1 1LECO1 1LFCO1 1LGCO1 1LHCO1 1LJCO1 1LNCO1 1LQCO1 1LSCO1 1LUCO1 1LXCO1 1LYCO1 1NFCO1 1NGCO1 1NHCO1 1NJCO1 1NNCO1 1NPCO1 1NQCO1 1NSCO1 1NTCO1 1NUCO1 1NXCO1 1NYCO1 1NZCO1 1PACO1 1PBCO1 1PECO1 1PGCO1 1PJCO1 1PNCO1 1PRCO1 1PTCO1 1PWCO1 1PXCO1 1PYCO1 1QDCO1 1QECO1 1QGCO1 1QHCO1 1QJCO1 1QPCO1 1QRCO1 1QSCO1 1QTCO1 1QWCO1 1QXCO1 1QYCO1 1RACO1 1RBCO1 1RDCO1 1RECO1 1RHCO1 1RJCO1 1RLCO1 1RNCO1 1RPCO1 1RQCO1 1RRCO1 1RSCO1 1RTCO1 1RUCO1 1RXCO1 1RYCO1 1RZCO1 1SACO1 1SBCO1 1SECO1 1SFCO1 1SGCO1 1SHCO1 1SJCO1 1SNCO1 1SPCO1 1SQCO1 1SRCO1 1SSCO1 1STCO1 1SUCO1 1SZCO1 1TBCO1 1TDCO1 1TGCO1 1THCO1 1TJCO1 1TLCO1 1TNCO1 1TPCO1 1TSCO1 1TTCO1 1TWCO1 1TYCO1 1UACO1 1UBCO1 1UDCO1 1UECO1 1UFCO1 1UGCO1 1ULCO1 1UNCO1 1UPCO1 1URCO1 1USCO1 1UTCO1 1UUCO1 1UWCO1 1UXCO1 1UZCO1 1WACO1 1WBCO1 1WDCO1 1WECO1 1WFCO1 1WGCO1 1WJCO1 1WNCO1 1WQCO1 1WRCO1 1WWCO1 1XACO1 1XDCO1 1XFCO1 1XJCO1 1XLCO1 1XNCO1 1XPCO1 1XRCO1 1XSCO1 1XTCO1 1XWCO1 1XXCO1 1XYCO1 1XZCO1 1YACO1 1YDCO1 1YECO1 1YFCO1 1YHCO1 1YNCO1 1ZACO1 1ZECO1 1ZHCO1 1ZPCO1 1ZRCO1 1ZSCO1 1ZTCO1 1ZUCO1 1ZXCO1 1ZY

Source: ONS Postcode Directory, August 2026, loaded 20 October 2026. Postcodes that have ended are not listed.

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Where the facts on this page come from

Contains public sector information licensed under the Open Government Licence v3.0. Contains HM Land Registry data © Crown copyright and database right 2021. This data is licensed under the Open Government Licence v3.0.

Licence: Open Government Licence v3.0.

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