Ofcom RID register · updated weekly
UK telecom providers — O
218 Ofcom-registered communications providers whose name begins with O, from the official RID (Reseller Identification) register, with each company’s registered address and published contact number. Part of the full UK provider directory.
| Provider | RID | Registered location | Contact |
|---|---|---|---|
| O'Brien MediaPEMBROKE DIGITAL LIMITED | RLH | 9 Pembroke Centre, Swindon, SN2 2PQ | 01793239120 |
| O2Be Un Limited | EFC | 260 Bath Road, Slough, SL1 4DX | 0113 388 1010 |
| O2Telefonica UK Limited | DUM | 260 Bath Road, Berkshire, SL1 4DX | 01753 628835 |
| OBNOpen by Nature Limited | GLE | 112-114 High Street, Hertfordshire, WD3 1AQ | 0330 828 0725 |
| OCCTAOCCTA LIMITED | QBK | 22 Pavilion View, Huddersfield, HD3 3WU | 08002606639 |
| OCEANNETOCEANNET BROADBAND LIMITED | SIX | 27 Old Gloucester Street, London, WC1N 3AX | 07780763241 |
| OCIUSNET UK LTDOciusnet UK Ltd | QFU | Four Columns, Broughton Hall Estate, Skipton, BD23 3AE | 0800 6889662 |
| OCM Communications LimitedOCM Communications Ltd | ITU | Forward House, Henley in Arden, B95 5AA | 01564 420 980 |
| OCS-UK IT Ltd | HVX | 9 Well Lane, Peterborough, PE8 5PF | 0844 991 0036 |
| OCTAPLUSUKOCTAPLUS NETWORKS LTD | QLK | Kemp House 152-160 City Road, LONDON, EC1V 2NX | 07736292021 |
| ODG Comms LtdODG COMMS LIMITED | SHM | 45 Acer Way, Monmouth, NP25 5UQ | 03330333333 |
| OGL ComputerOGL COMPUTER SUPPORT LIMITED | NSF | OGL Computer, Stourport on Severn, DY13 9AT | 01299873873 |
| OHANA8 LTDOHANA 8 LTD | REJ | 25 Wilton Road, LONDON, SW1V 1LW | 07725837559 |
| OJITJOKG Limited | KKM | Victoria House, Fareham, PO16 7TE | 2380000088 |
| ONESTOPITMONE STOP ITM LIMITED | NSP | 49 Queen Victoria Street, London, EC4N 4SA | 07944192640 |
| ONETECHUKONETECHUK LTD | PIH | 1st floor morgan reach house, Birmingham, B16 9NX | 03338001313 |
| OPTIS TELECOMDHRITHIQUEST LIMITED | SKE | Weller House, London, IG11 8RT | 02080585264 |
| OX365OX365 Ltd | KVS | 1 Oxford Road, Oxford, OX44 9DA | 3304455365 |
| OYATECHOYATECH LIMITED | NLR | 71-75 Shelton Street, London, WC2H 9JQ | 02071128690 |
| OZ Cloud Ltd | JPD | 421 High Road, London, N12 0AP | 0845 056 3450 |
| Oak TelecomOak Innovation Limited | CHJ | 7 Albany Park, Dorset, BH17 7BX | 01202 607 000 |
| Oakford Internet Services (OIS)Oakford Internet Services Ltd | LAX | 9-10, Prince Maurice Court, Devizes, SN10 2RT | 03302 230 230 |
| Oakhill Voice Solutions LtdOakhill Voice Solutions Limited | KYE | AU30, Milton Keynes, MK3 6EB | 01908 889490 |
| Oasis Technology Ltd | FVN | 17 Ambleside Way, Warwickshire, CV11 6AT | 01455 240 140 |
| Objective Source LtdOBJECTIVE SOURCE LTD. | RNQ | Portland House, Cardiff, CF10 5EQ | 02920 098 088 |
| Objective TechnologiesOBJECTIVE TECHNOLOGIES LTD | NDG | Energy House, Ringwood, BH24 1PD | 01425205200 |
| Oblivion Media | MAC | 184 Well Hall Road, London, SE9 6SR | 01797 208037 |
| Obsidian Networks Ltd | KZW | Chantry Court, Chester, CH1 4QN | 1244569928 |
| Ocean Data and Voice Services Ltd.Ocean Data & Voice Services Ltd | CLG | 2 Ocean Quay Marina, Southampton, SO14 5QY | 0845 050 5656 |
| Ocean Digital Ltd | KNX | Clifton House, Bournemouth, BH2 5PS | 01202 788496 |
| Ocean PayOcean Pay Ltd | PNU | 25 boringdon avenue, Plymouth, Pl5 1uu | 01752916021 |
| Ocean TelecomOCEAN TELECOM LIMITED | PWN | 10 Woodside Business Park, Ingham, IP31 1NR | 01284771555 |
| Ocean Telecom UK Ltd | EYW | Unit 1, Shropshire, SY10 8NH | 01691 661 177 |
| Ocean Unified Communications Ltd | FUQ | 110 Clifton Street, London, EC2A 4HT | 0845 006 6800 |
| Ocean Voice and Data Ltd | DYH | 6 The Matlings, Hertforshire, SG12 9LR | 0870 2202768 |
| OctaNetOCTANET LTD | RWK | 128 City Road, London, EC1V 2NX | 01304795007 |
| Octagon Communications Ltd | DZK | Octagon House, Ashton-in-Makerfield, WN4 8DE | 08456 787878 |
| Octagon Technology LtdOCTAGON TECHNOLOGY LIMITED | NPT | 13, Lincoln, LN1NB | 01522797520 |
| Octagon Telecom Limited | GFK | Sterling House, Essex, IG10 3TS | 020 3651 8000 |
| Octavian CommunicationsOCTAVIAN COMMUNICATIONS LIMITED | PNJ | Chesterfield House, Nottingham, NG13 8AQ | 07970731708 |
| Octavian IToctavian it ltd | KWP | 175 Huntingdon Street, Nottingham, NG1 3NL | 0115 77 88 409 |
| OctetOctet Telecom Limited | PFQ | Floor 3, London, EC4M 7JN | 07969543196 |
| Octex | KIH | 10 Horseshoe Business Park, St. Albans, AL2 3TA | 7801882835 |
| Octopus ComputersOCTOPUS ENTERPRISES LIMITED | NAQ | Stamford, PE9 3SS | 01572724185 |
| Octopus ITCUSTOM BUSINESS SOLUTIONS UK LIMITED | SEF | 561 Mierscourt Road, Rainham, ME8 8RB | 01634862122 |
| Octopus Telecom LtdOctopus Telecom Limited | EYH | 8 Lombard Road, London, SW19 3TZ | 0800 0283 166 |
| Ocucon LimitedOCUCON LIMITED | NCE | The Old Pub, Newcastle upon Tyne, NE61LR | 01912442444 |
| Odyssey Systems Ltd | BEU | — | — |
| Office 21 LTDOFFICE 21 LTD | RHP | 208 Chester House, London, SW9 6DE | 02045530000 |
| Office Equipment Systems LtdOFFICE EQUIPMENT SYSTEMS LIMITED | QUL | Nexus House, St Asaph, LL17 0LP | 01745 335969 |
| Office Pro Telecoms | KUF | 139 Rooley Lane, Bradford, BD5 8JH | 7548884070 |
| Office Ready Solutions LtdOffice Ready Technology Limited | NPL | Honeycomb South, Chester, CH4 9QJ | 02030319800 |
| Office Tech SuiteOFFICE TECH SUITE LTD | SCH | 221 Central Park, Petherton Road, Bristol, BS14 9BZ | 0117 4520033 |
| Office UnlockedOffice Unlocked Limited | DFH | 41 Lordsmead, Beds, MK43 0HP | 03333 209 020 |
| OfficeAnyplace LimitedOfficeAnyplace Ltd | KUA | 42 Tamworth Road, Croydon, CR0 1XU | 2082537253 |
| OfficeTekOfficeTek Solutions Ltd | MGW | First Floor, West Bromwich, B70 6NY | 0121 525 0016 |
| Offsite Cloud LtdOFFSITE CLOUD LTD. | SBJ | Unit 3 Brocks Business Park, Wickford, SS11 8YN | 01245 205970 |
| Offsite IT Ltd | HHD | Unit 3, Monument offices,, Maldon, CM9 6SN | 01621 850550 |
| Ogilvie CommunicationsNet Defence Limited | EQR | Ogilvie Communications, Stirling, FK7 8ES | 01786 810 810 |
| OhSo ConnectedOHSO TECHNICAL LTD | NEK | Eternity House, London, E4 9GA | 02039635533 |
| OliloOLILO UK & IRELAND LTD | SBP | 3rd Floor, London, EC2A 4NE | 07534302245 |
| Ollesso LtdOLLESSO LIMITED | PAH | 3 Hop Gardfen Way, Hertfordshire, WD25 0JN | 07809893600 |
| OllyCom | KYP | 30 Cuerdale Sreet, Burnley, BB102EP | 7486914391 |
| Omni Telecom LtdOMNI TELECOM LTD | RJK | 25 Blinco Road, Northamptonshire, NN100EA | 07939678963 |
| Omni3 CommunicationsOmni13 Limited | NHW | 2 Masons Way, Pulborough, RH20 1DZ | 02039987027 |
| OmniscottOmniscot Limited | KYY | 1 Cromwell Road, Inverness, IV1 1SX | 01463 896777 |
| OmnixiSIGNAL SOLUTIONS LTD | SMV | Arlots Farm Barns, Hartley Wintney, RG27 8AJ | 02038237365 |
| On Air Telecom Ltd | DYM | Westpoint, Manchester, M16 9HU | 0161 9060845 |
| On Line ComputingAT On Line Computing Limited | KSK | 4th Floor 33 Cannon St, London, EC4M 5SB | 2074541254 |
| On Line Systems (Northern) Ltd | BCH | — | — |
| On-Communications Limited | ELZ | The Quadrant, Sheffield, S9 4WG | 08704 296745 |
| On2net (UK) LtdON2NET (UK) LIMITED | NBX | Centrix House, Hednesford, WS12 2HA | 01543270215 |
| OnBrand Group LtdOnbrand Group Limited | LJX | 29-45 High Street, Edgware, HA8 7UU | 2089319300 |
| OnTime Computer ServicesOnTime IT & Comms Limited | MZE | Unit 3, Stornoway, HS1 2RF | 1851702039 |
| Onboard 365 LtdONBOARD 365 LTD | QRE | Rm 15 Fides House, Woking, GU21 5AB | 01483672610 |
| One (UK) Ltd | FUE | Unit H3A, Dorset, BH15 4JY | 01202 596 520 |
| One Big Solution | EYK | 3 Onslow Avenue, Sutton, SM2 7ED | 0845 413 2600 |
| One Call TechnologiesONE CALL TECHNOLOGIES LIMITED | RML | First Point, Doncaster, DN4 5JQ | 020 3738 7499 |
| One Cloud Telecom LtdONE CLOUD TELECOM LTD. | NVF | 71-75, London, WC2H 9JQ | 020 33 888 555 |
| One Communication SolutionsONE COMMUNICATION SOLUTIONS LTD | PAG | 5 Hunters Walk, Warwickshire, CV9 3SU | 07872468781 |
| One Connectivity LtdOne Connectivity Limited | GKP | 10 Glover Road, Derbyshire, DE74 2GL | 01332 811890 |
| One Connectivity Solutions LimitedONE CONNECTIVITY SOLUTIONS LIMITED | SLL | Unit 7 Redwing Court, Castle Donington, DE74 2UH | 01158968860 |
| One Education ConnectOne Education Limited | IVH | Universal Square, Manchester, M12 6JH | 0844 967 1113 |
| One Link | MSX | 26 BURN BRAE GREEN, BANBRIDGE, BT32 4GG | 7902847759 |
| One Point HostingOne Stop IT Services Ltd | QKQ | 10 Stanley road, Christchurch, bh23 5hl | 07392994022 |
| One Point TelecomOne Point Telecom Limited | CCC | One Point Telecom, Tolworth, Surrey, KT5 5RN | 08704 424 343 |
| One Simple SwitchONE SIMPLE SWITCH LIMITED | QHJ | Bramerton Business Centre, Hockley, SS5 4PJ | 01268920050 |
| One Source Communications Ltd | EKJ | 16 Commerce Road, Peterborough, PE2 6LR | 0845 127 1421 |
| One Stop ComputersOne Stop Computers (STOKE) LTD | LQW | 173-175, Stoke on Trent, ST4 5RW | 01782 847208 |
| One TekOne Tek Business Solutions Limited | GFB | Merdian House, Cheshire, CW7 3QG | 0844 993 4147 |
| One2call LtdOne2call Limted | ERU | Unit 16, Sheffield, S20 3FR | 0800 9555 866 |
| One36 Computing Ltd | LJE | 136 Comiston Road, Edinburgh, EH10 5QN | 0131 466 7748 |
| OneCloud Networks LtdOneCloud Networks Limited | LPH | 302B, Regus, Regal House, 70 London Road, Twickenham, London, TW1 3QS | 020 3909 8601 |
| Onebill TelecomXLN Telecom Ltd | ERX | 69 Bondway, London, SW8 1SQ | 020 7793 5530 |
| Onebyte LtdOnebyte Limited | GHF | 27 St Andrews Street, Norfolk, NR2 4TP | 0845 034 7760 |
| Onecom Limited | FWI | Onecom House, Hampshire, PO15 7FJ | 03300 888 999 |
| Onecom Limited (Bridge Solutions)Onecom Limited | GZP | 4400 Parkway, Fareham, PO15 7FJ | 01793 438 881 |
| Onecom Limited (Cablestream Ltd)Onecom Limited | CYF | 4400 Parkway, Fareham, PO15 7FJ | 03300 888 999 |
| Onecom Limited (Dalys Systems Limited)Onecom Limited | DWV | 4400 Parkway, Fareham, PO15 7FJ | 0116 242 6990 |
| Onecom Limited (Evolve)Onecom Limited | DFT | Onecom House, 4400 Parkway, Fareham, PO15 7FJ | — |
| Onecom Limited (IMS Technology)Onecom Limited | EIB | 4400 Parkway, Fareham, PO15 7FJ | 0844 822 1212 |
| Onecom Limited (Nice Network Limited)Onecom Limited | GCZ | 4400 Parkway, Fareham, PO15 7FJ | 0191 534 0140 |
| Onecom Limited (Olive Business Solutions Limited)Onecom Limited | CHI | 4400 Parkway, Fareham, PO15 7FJ | 0870 444 1083 |
| Onecom Limited (Solution IP Communications Limited)Onecom Limited | DIY | 4400 Parkway, Fareham, PO15 7FJ | 0871 222 9422 |
| Onecom Limited (Voice Over IP Ltd)Onecom Limited | CQV | 4400 Parkway, Fareham, PO15 7FJ | 01392 445 566 |
| Onecom Limited (Wish Solutions (GB) Limited)Onecom Limited | DYY | 4400 Parkway, Fareham, PO15 7FJ | 01327 359111 |
| OnegaOnega Ltd | DNH | Studio H, Container City 2, London, E14 0JY | 0870 060 1310 |
| OneitsolutionsGEL Holdings Limited | LEF | Suite 6 4th Floor, wembley Middlesex, HA01EH | 020 3137 6201 |
| Onestop IT SolutionsOnestop ITS Limited | DYP | 32/6 Hardengreen Industial Estate, Midlothian, EH22 3NX | 0131 510 0100 |
| OnestreamOnestream Ltd | LFR | Onecom House, Fareham, PO15 7FJ | 01489 587200 |
| OnestreamDigital Phone Company Ltd | FNK | 16 Southgates Road, Norfolk, NR30 3LJ | 0845 000 6000 |
| Onex Solutions LTDONEX Solutions LTD | KXN | Radford Business Centre, Billericay, CM12 0DP | 2030111445 |
| Onionring LimitedONIONRING LIMITED | RAJ | 4th Floor Silverstream House, London, W1T 6EB | 01613990736 |
| Online PerspectivesONLINE PERSPECTIVES LIMITED | RAR | 19 Stringers Avenue, Guildford, GU4 7NW | 02081230560 |
| Online Support ComputingOnline Support Computing Limited | HCG | 67a Boston Manor Road, Brentford, TW8 9JQ | 020 8232 1190 |
| Online50 Limited | IBL | Unit 57,, London, E14 9TS | 020 7536 7749 |
| Ontech SolutionsOntech Solutions Limited | GCL | 4 Langford Court, Essex, CM15 0LB | 0871 221 2671 |
| OntraqOntraq Limited | KBW | 74 Duke Street, Chelmsford, CM1 1JP | 01245 265100 |
| Onward Professional Services LtdONWARD PROFESSIONAL SERVICES LTD | SLE | The Stable house, Newport, TF108DS | 01952 985976 |
| Onwave UK Limited | FMF | The Oasts, Westerham, Kent, TN16 1QP | 0845 413 5999 |
| Onwigo LtdONWIGO LTD | RUV | Bank House, Congleton, CW12 1ET | 01260606909 |
| Onyx Group Limited | FKZ | 9 Cheltenham Road, Stockton on Tees, TS18 2AD | 01642 216200 |
| OnyxITClipeum IT Group Limited | KNN | 100 Hellesdon Park Industrial Estate, Norwich, NR6 5DR | 1603414142 |
| Oosha Ltd | EDI | Suite 2, Wolverhampton, WV1 1HT | 01902 702233 |
| Opal IT LtdOpal IT Limited | LWC | Media Exchange One, Newcastle upon Tyne, NE1 2QB | 0330 2233011 |
| Opal TelecomTalkTalk Communications Limited | BVE | Stanford House, Warrington, Cheshire, WA3 7BH | 0845 330 3456 |
| Opal Telecom IndirectTalkTalk Communications Limited | CDG | Northbank, Manchester, M44 5BL | 0845 330 6725 |
| Opal TelecomsPEOPLE ACCESS LTD | SAU | 173 Watling Street, Towcester, NN12 6BX | 01604 969 401 |
| Open Access Ltd | MEW | Colonial House, Leiston, IP16 4JD | 01728 832712 |
| Open Fibre UK LTDOPEN FIBRE UK LIMITED | QRL | Orchard House, Hessle Square, Hull, HU130AA | 01482680080 |
| Open IP LtdJust Technology Group Ltd | DYF | CPA House, Bolton, BL4 7JN | 0845 868 7263 |
| Open Network Services Ltd (ONS)Open Network Services Limited | FSG | Windsor House, Hampshire, PO10 8PF | 0845 225 3389 |
| Open Telecom Limited | EDH | Siddeley House, Surrey, KT2 6LX | 020 3388 3030 |
| Open VoIPOPEN TECH (EAST YORKSHIRE) LIMITED | NSE | Orchard House Hessle Square, Hull, HU13 0AA | 01482 429800 |
| Open-LinkOpen-Link Technology Limited | BSP | Open-Link Technology Limited, Near Reading, RG7 5HR | 08700 500 771 |
| OpenAIR Systems Ltd | MGJ | 1 Holmbury Grove, Croydon, CR0 9AN | 2081233090 |
| OpenIP ServicesJust Technology Services Ltd | LCP | Office 617,6th Floor, Bolton, BL1 2AX | 3332413150 |
| OpenITC | GJL | 44 Moorhead, Newcastle upon Tyne, NE5 3AP | 0333 340 6736 |
| OpenVoice LimitedOpenVoice Ltd | MUG | Tadcaster Enterprise Park, Tadcaster, LS24 9JF | 01904 202500 |
| OpenreachOpenreach Limited | SMR | 6 Gracechurch St, London, EC3V 0AT | 07838121595 |
| Opera TelecomDynamic Mobile Billing Limited | BNJ | 19 Cato Street, Birmingham, B7 4TS | 0808 131 3131 |
| Opex HostingWordwatch Limited | DYX | Operations Service Centre, Middlesex, TW7 4ED | 020 8326 8200 |
| OpiousOpious Ltd | KKN | The Old School House, Cranfield, MK43 0DR | 01234 819 819 |
| Opta Networks | NXP | 2 Vincent Close, Corringham, SS17 7QL | 07931111680 |
| OptaNet Ltd | INT | Tower Point, Brighton, BN11YR | 2034753611 |
| OptiConnectFF GLOBAL LIMITED | RTR | Unit A, Mildenhall, IP28 7DE | 07726 155 999 |
| Optic NetworksOPTIC NETWORKS LTD | NXE | Knaresborough Technology Park, Yorkshire, HG5 8LF | 01423297892 |
| Optics Internet LtdOPTICS INTERNET LIMITED | MCM | 4 Lockside Office Park, Preston, PR2 2YB | 3300232323 |
| OptimaOPTIMA COMPUTER CENTRE LIMITED | RWX | 15 Sussex Ring, London, N12 7HX | 02084456700 |
| Optimal ProjectsOPTIMAL PROJECTS LTD | PCQ | 50 Lime Tree Avenue, Worthing, BN14 0DP | 03301227220 |
| Optimised ITOptimised IT Limited | FDC | 5 Foxcovert Lane, Cheshire, WA16 9QP | 01565 722280 |
| Optimity Limited | BSJ | — | — |
| Optimus Networksoptimus networks LTD | LDF | 19 Vernon Close, Manchester, SK8 6AN | 1618505065 |
| OptinetOptinet U.K. Limited | LHV | Monometer House, Essex, SS9 2HL | 7825432757 |
| Option One Communications Ltd | KBM | 4, Wilton Cottages, Box, SN13 8AT | 1225744947 |
| Optionbox Ltd | GHQ | Unit 5F, Birstall, WF17 9JX | 0333 200 4680 |
| Optix Software Ltd | HKE | Poppleton House, York, YO26 6RU | 01904 606 606 |
| Optua TelecommunicationsFibre Networks (Scotland) Limited | SKC | 2nd Floor, Glasgow, G2 1BP | 0800 054 8330 |
| Opus Business Systems LimitedOPUS BUSINESS SYSTEMS LIMITED | BZT | 1st Floor London Court, Surrey, RH2 9AQ | 01732 446 644 |
| Opus TechOPUS BUSINESS SYSTEMS LIMITED | CRM | 1st Floor London Court, Surrey, RH2 9AQ | 1732446644 |
| Opus TechnologyOPUS BUSINESS SYSTEMS LIMITED | EPZ | 1st Floor London Court, Surrey, RH2 9AQ | 1732446644 |
| Opus UK LtdOpus UK Limited | GNV | 10 Clock Court, Sheffield, S25 3QD | 01909 518 811 |
| OrangeEE Limited (Orange) | CEA | St James Court, Bristol, BS32 4QJ | 07973 202 039 |
| Orange BroadbandOrange Home UK Plc | DKI | Orange Customer Care, Rotherham, S63 5ZX | 08700 102 462 |
| Orange Business ServicesOrange Business Holdings UK Limited | IXV | 217 Bath Road, Slough, SL1 4AA | +44 2083214897 ext. 2305 |
| Orange PenguinORANGE PENGUIN ICT LTD | SBC | Discovery House 3.2, Dundee, DD2 1SW | 01382250101 |
| Orange Stripe Network ServicesOrangestripe Telecom Ltd | GHD | 39 Pure Offices, Swindon, SN2 8BW | 01793 700 536 |
| OrannetAgurtso Holdings Limited | GAE | Business First Centre, Liverpool, L24 9HJ | 0845 120 5440 |
| Orb Communications Ltd | BTW | — | — |
| Orbex Solutions Limited | CSL | Accurist House, London, W1U 7AL | 0870 0411 411 |
| OrbicommORBICOMM LIMITED | QIF | Unit 17 Long Lane Industrial Estate, Halesowen, B62 9LD | 01212710344 |
| Orbis Protect Limited | SMM | Beaufort House, Uxbridge, UB8 1QG | 01895465500 |
| Orbis TelecomCloudcoco Connect Limited | DFZ | 22 St Peters Road, Dorset, BH1 2LE | 01202 299799 |
| Orbiss Limited | GIC | Lowen House, Cornwall, TR4 8QQ | 01872 561 656 |
| Orbital Net LtdOrbital Net Limited | FZU | County House, Kent, CT4 5DT | 01233 80 70 60 |
| Orbital NetworksOrbital Networks Limited | JNL | 130 Cassini Drive, Swindon, SN25 2LW | 0845 880 2634 |
| OrbixOrbix UK Ltd | IDH | Old Stable Yard, Hamption, TW12 2AL | 0844 875 0108 |
| OrbtalkOrbtalk Limited | DUA | Unit 4, Hove, BN3 7ES | 0845 868 8557 |
| Orbus UKANYLEAD LTD | RPK | 113 Romford Road, LONDON, E15 4LY | 07861685910 |
| Orca Telecom LtdArrow Business Communications (Scotland) Limited | CNX | 2nd Floor, Perth, PH1 5SP | 0844 224 7373 |
| OrchardOrchard ICT Ltd | ETF | Barham House, Wiltshire, SN10 3PZ | 01380 848 294 |
| Orchard Electronics LtdORCHARD ELECTRONICS (COMPUTER SPECIALISTS) LIMITED | NYB | 5 turnberry, Tamworth, B77 4NR | 07850629040 |
| Orchard House ComputersOrchard House Computers Limited | LYJ | Wood Farm Barn, The Street, Flixton, NR35 1NZ | 01986 891000 |
| Orchard TelecomOrchard Business Energy Limited | LVN | 37 Kew Road, Richmond, TW9 2NQ | 2083321019 |
| OrginOrigin Communications Limited | GHZ | Soapworks, Salford, M5 3TT | — |
| Oricom Ltd | GBA | Unit 4, Irvine, KA12 8JJ | 0844 4154888 |
| Origin SolutionsOrigin Solutions Ltd | MEB | 1st Floor, 2 Woodberry Grove, London, N12 0DR | 8432894116 |
| Origin Systems LimitedORIGIN SYSTEMS LIMITED | SMS | 4 Banning Street, London, SE10 9PH | 02033583355 |
| OriginConnectORIGIN CONNECT LTD | SHI | Unit 4 The Granary, Goblands Farm Business Centre, TONBRIDGE, TN11 0DP | 07384841649 |
| Original ConsultantsORIGINAL CONSULTANTS LTD | RUL | The Lypiatts, Cheltenham, GL50 2JA | 01242438700 |
| Orion SystemsOrion Control Systems Ltd | IRG | Treetops Farm, Oakthorpe, DE12 7RG | 01530 274455 |
| OrtigaOrtiga Group Services Ltd | DIR | Fairgate House, Birmingham, B11 2AA | 0333 567 7700 |
| OryxAlign Limited | EXJ | The Shepherds Building, London, W14 0DA | 020 7608 7890 |
| OscarOnlineOSCARONLINE LIMITED | QSG | 1a High Street, Studley, B80 7HN | 01527598803 |
| Osiris ITOSIRIS TECHNOLOGIES LTD | SAB | Unit 8 White Lodge Business Park, Norwich, NR4 6DG | 01603964914 |
| Otra DiaOtra Dia Ltd | EIQ | 2nd Floor, London, EC1V 4PY | 0800 0336 444 |
| Ounsworth LtdOUNSWORTH LIMITED | REA | 28 Hagbourne Road, Didcot, OX118DR | +447843492095 |
| Our IT DepartmentOur IT Department Ltd | KTR | 128 - 132 Station Road, Chingford, London, E4 6AB | 2037808896 |
| Our Lady of Lourdes CMATOur Lady of Lourdes Catholic Multi Academy Trust | SHB | 1st Floor Loxley House, Nottingham, NG2 1RT | 01158515454 |
| Ouse Communications LtdOUSE COMMUNICATIONS LTD | QYS | 7 Loak Close, BEDFORD, MK41 6GQ | 01234210925 |
| Out of Hours Ict LtdOut Of Hours ICT Ltd | IGD | 16 Durward, East Kilbride, G74 3PB | 0141 433 0492 |
| OutersightOutersight (UK) Ltd | LAM | Unit 28, Mary Seacole Road, Plymouth, PL1 3JY | 1752220860 |
| Outright IT LimitedOUTRIGHT IT LIMITED | SAI | Merlin House, Lee-On-The-Solent, PO13 9FU | 03300437099 |
| Outside Help LimitedOUTSIDE HELP LIMITED | RRB | Crown House, London, WC1N 3AX | 02045518234 |
| Outsource TelecomOutsource Online LLP | LME | 3 Plasketts Close, Antrim, BT41 4LY | 2894485112 |
| OutsourceOperations Ltd | EVZ | Eagle Tower, Cheltenham, GL50 1TA | 01242 244 843 |
| Outsourced IT Limited | JHY | 35 Tansey End, Biggleswade, sg188wl | 1767600604 |
| Outsourced Telecom Limited | FHC | 4 Falcon Way, Herts, AL7 1TW | 0845 408 2283 |
| OutsourcevoiceOutsourcevoice Ltd | DTS | Eagle Tower, Gloucestershire, GL50 1TA | 01242 244843 |
| Overline Network ConsultantsOverline Network Consultants Limited | CJN | Unit 8, The Quoin Estate, West Sussex, BN15 8AD | 0870 891 9001 |
| Owl Technical Services Limited | KHN | 22 Gibson Road, High Wycombe, HP12 4QW | 01494 627001 |
| Owlnet IP LtdOWLNET IP LTD | RVF | First Floor Offices, Tadcaster, LS24 9AB | 01134652666 |
| Oxagon LtdOXAGON LTD | PGF | 125 Cherry Orchard Road, Croydon, CR0 6BE | 0208 4072 570 |
| Oxford Mac SolutionsOMSUK Ltd | GXA | Macintosh House, Oxfordshire, OX29 4PD | 01865 882 504 |
| on-line.uk.netPaul Hooker | IER | 24 Cherry Orchard, Worcester, WR6 6ND | 01905 621388 |
| onezoonezo ltd | MWF | Ely House, Wyvern Business Park, Derby, DE21 6LY | 1332207848 |
| ontelontel services Ltd | JRP | Unit 6, Chesham, HP5 1SD | 1494372211 |
| oprusnetAYTAS INFO LIMITED | QCL | Britannia House Units,24 Block 4, Brignell Road, middlesbrough, ts21ps | 07999939009 |
Source: Ofcom UK Numbering Data (RID register), Open Government Licence v3.0. Addresses are the companies’ own register entries and can lag behind moves or renames.