| 193.60.0.0/14 | JANET JANET(UK) Network Operations Centre Third floor 15 Fet | 262K | GB |
| 194.80.0.0/14 | JANET JANET(UK) Network Operations Centre Third floor 15 Fet | 262K | GB |
| 138.250.0.0/15 | JANET Aggregated Route JANET(UK) Network Operations Centre 1 | 131K | GB |
| 143.52.0.0/15 | JANET Aggregated Route JANET(UK) Network Operations Centre 1 | 131K | GB |
| 195.194.0.0/15 | JANET JANET(UK) Network Operations Centre Third floor 15 Fet | 131K | GB |
| 128.16.0.0/16 | University College London Department of Computer Science Gow | 66K | GB |
| 128.232.0.0/16 | University of Cambridge Computer Laboratory | 66K | GB |
| 128.240.0.0/16 | University of Newcastle upon Tyne Computing Laboratory Clare | 66K | GB |
| 128.243.0.0/16 | The University of Nottingham University Park Nottingham NG7 | 66K | GB |
| 128.40.0.0/16 | University College London Department of Computer Science Gow | 66K | GB |
| 128.86.0.0/16 | JANET Aggregated Route JANET(UK) Network Operations Centre T | 66K | GB |
| 129.11.0.0/16 | Leeds University Leeds LS2 9JT UNITED KINGDOM | 66K | GB |
| 129.12.0.0/16 | University of Kent The University Canterbury, Kent CT2 7NF U | 66K | GB |
| 129.169.0.0/16 | Cambridge University University Engineering Department Trump | 66K | GB |
| 129.215.0.0/16 | University of Edinburgh Argyle House 3 Lady Lawson St Edinbu | 66K | GB |
| 129.234.0.0/16 | University of Durham South Road Durham DH1 3LE UNITED KINGDO | 66K | GB |
| 129.31.0.0/16 | Imperial College of Science and Technology South Kensington | 66K | GB |
| 129.67.0.0/16 | Oxford University Science Area Oxford UNITED KINGDOM | 66K | GB |
| 130.159.0.0/16 | University of Strathclyde Curran Building 100 Cathedral Stre | 66K | GB |
| 130.209.0.0/16 | Glasgow University Glasgow G12 8QQ Scotland UNITED KINGDOM | 66K | GB |
| 130.246.0.0/16 | Rutherford Appleton Laboratory Chilton Didcot Oxon OX11 0QX | 66K | GB |
| 130.88.0.0/16 | Network Unit University of Manchester Oxford Road Manchester | 66K | GB |
| 131.111.0.0/16 | University of Cambridge Computer Laboratory New Museums Site | 66K | GB |
| 131.227.0.0/16 | University of Surrey Guildford Surrey GU2 5XH UNITED KINGDOM | 66K | GB |
| 131.231.0.0/16 | Loughborough University University of Technology Loughboroug | 66K | GB |
| 131.251.0.0/16 | Cardiff University Information Services 40/41 Park Place Car | 66K | GB |
| 134.151.0.0/16 | Aston University Aston Triangle Birmingham UNITED KINGDOM | 66K | GB |
| 134.219.0.0/16 | Royal Holloway and Bedford New College Egham Surrey TW20 0EX | 66K | GB |
| 134.220.0.0/16 | University of Wolverhampton Computer Centre Wulfruna Street | 66K | GB |
| 134.225.0.0/16 | Reading University Computer Services Centre Whiteknights Par | 66K | GB |
| 134.36.0.0/16 | Dundee University Dundee DD1 4HN Scotland UNITED KINGDOM | 66K | GB |
| 134.83.0.0/16 | Brunel University Uxbridge Campus Uxbridge UB8 3PH UNITED KI | 66K | GB |
| 136.148.0.0/16 | South Bank University Borough Road London SE1 0AA UNITED KIN | 66K | GB |
| 137.108.0.0/16 | Open University Walton Hall Milton Keynes MK7 6AA UNITED KIN | 66K | GB |
| 137.195.0.0/16 | Heriot-Watt University Riccarton Edinburgh EH14 4AS UNITED K | 66K | GB |
| 137.222.0.0/16 | The University of Bristol Computing Service Tyndall Avenue B | 66K | GB |
| 137.253.0.0/16 | University of London | 66K | GB |
| 137.44.0.0/16 | JANET | 66K | GB |
| 137.50.0.0/16 | Northern College Aberdeen Campus Hilton Place Aberdeen Scotl | 66K | GB |
| 137.73.0.0/16 | King's College London Strand Campus London WC2R 2LS UNITED K | 66K | GB |
| 138.253.0.0/16 | University of Liverpool Computing Services Department Brownl | 66K | GB |
| 138.38.0.0/16 | Bath University Claverton Down, Bath Avon BA2 7AY UNITED KIN | 66K | GB |
| 138.40.0.0/16 | City St. George's, University of London | 66K | GB |
| 139.133.0.0/16 | University of Aberdeen Regent Walk Aberdeen AB9 1FX UNITED K | 66K | GB |
| 139.153.0.0/16 | University of Stirling Stirling FK9 4LA UNITED KINGDOM | 66K | GB |
| 139.166.0.0/16 | National Oceanography Centre | 66K | GB |
| 139.184.0.0/16 | Computing Service University of Sussex Falmer Brighton East | 66K | GB |
| 139.222.0.0/16 | University of East Anglia University Plain Norwich NR4 7TJ U | 66K | GB |
| 140.97.0.0/16 | London Metropolitan University 16 Goulston St London E1 7TP | 66K | GB |
| 141.241.0.0/16 | Kingston University Penrhyn Road Kingston-upon-Thames Surrey | 66K | GB |
| 143.117.0.0/16 | Queens University Belfast Computer Centre Botanic Ave Belfas | 66K | GB |
| 143.167.0.0/16 | University of Sheffield 2 Hounsfield Road Sheffield S10 2TN | 66K | GB |
| 143.210.0.0/16 | University of Leicester University Road Leicester LE1 7RH UN | 66K | GB |
| 143.234.0.0/16 | SARI | 66K | GB |
| 144.173.0.0/16 | Exeter University North Park Road Exeter EX4 4QE UNITED KING | 66K | GB |
| 144.32.0.0/16 | University of York | 66K | GB |
| 144.82.0.0/16 | The Bloomsbury Computing Consortium Kathleen Lonsdale Buildi | 66K | GB |
| 146.169.0.0/16 | Imperial College of Science and Technology and Medicine Impe | 66K | GB |
| 146.176.0.0/16 | Napier University Sighthill Court Edinburgh Scotland EH11 4B | 66K | GB |
| 146.179.0.0/16 | Imperial College London Exhibition Road London SW7 2BX UNITE | 66K | GB |
| 146.191.0.0/16 | University of Paisley High Street Paisley Renfrewshire PA1 2 | 66K | GB |
| 146.227.0.0/16 | De Montfort University The Gateway Leicester England LE1 9BH | 66K | GB |
| 146.87.0.0/16 | Salford University IT Services 5th Floor, Humphrey Booth Bui | 66K | GB |
| 146.97.0.0/16 | JANET JANET(UK) Network Operations Centre Third floor 15 Fet | 66K | GB |
| 147.143.0.0/16 | University College of North Wales Sackville Road Bangor Gwyn | 66K | GB |
| 147.188.0.0/16 | University of Birmingham Edgbaston Birmingham B15 2TT UNITED | 66K | GB |
| 147.197.0.0/16 | University of Hertfordshire Computer Centre College Lane Hat | 66K | GB |
| 148.197.0.0/16 | University of Portsmouth Mercantile House Hampshire Terrace | 66K | GB |
| 148.79.0.0/16 | Daresbury Laboratory Daresbury Warrington WA4 4AD UNITED KIN | 66K | GB |
| 148.88.0.0/16 | Lancaster University Lancaster LA1 4YW UNITED KINGDOM | 66K | GB |
| 149.155.0.0/16 | Biotechnology And Biological Science Research Council West C | 66K | GB |
| 150.204.0.0/16 | Liverpool John Moores University Computer Services Departmen | 66K | GB |
| 152.105.0.0/16 | University of Teesside Borough Road Middlesbrough Cleveland | 66K | GB |
| 152.71.0.0/16 | The Nottingham Trent University Burton Street Nottingham Eng | 66K | GB |
| 152.78.0.0/16 | Southampton University Computing Services Highfield Southamp | 66K | GB |
| 155.198.0.0/16 | Imperial College of Science and Technology South Kensington | 66K | GB |
| 155.245.0.0/16 | University of Essex Computing Service Wivenhoe Park Colchest | 66K | GB |
| 157.140.0.0/16 | Natural History Museum Cromwell Road South Kensington London | 66K | GB |
| 157.228.0.0/16 | University of Sunderland Langham Tower Ryhope Road Sunderlan | 66K | GB |
| 158.125.0.0/16 | Loughborough University | 66K | GB |
| 158.143.0.0/16 | London School of Economics and Political Science Houghton St | 66K | GB |
| 158.223.0.0/16 | Goldsmith's College New Cross London Greater London SE14 6NW | 66K | GB |
| 159.86.0.0/16 | PSBA Network Welsh Assembly Government | 66K | GB |
| 160.5.0.0/16 | Keele University Computer Centre Keele University Keele Staf | 66K | GB |
| 160.9.0.0/16 | Leeds Beckett University | 66K | GB |
| 161.112.0.0/16 | University of Huddersfield | 66K | GB |
| 161.73.0.0/16 | Oxford Brookes University | 66K | GB |
| 161.74.0.0/16 | University of Westminster Information Resource Services 115 | 66K | GB |
| 161.76.0.0/16 | University of East London Longbridge Road Dagenham Essex RM8 | 66K | GB |
| 163.1.0.0/16 | Oxford University Computing Service 13 Banbury Road Oxford O | 66K | GB |
| 163.167.0.0/16 | University of North London 166-220 Holloway Road London Engl | 66K | GB |
| 164.11.0.0/16 | University of the West of England Bristol Coldharbour Lane F | 66K | GB |
| 194.66.0.0/16 | JANET JANET(UK) Network Operations Centre Third floor 15 Fet | 66K | GB |
| 212.219.0.0/16 | JANET JANET(UK) Network Operations Centre Third floor 15 Fet | 66K | GB |
| 81.87.0.0/16 | JANET JANET(UK) Network Operations Centre Third floor 15 Fet | 66K | GB |
| 139.184.0.0/17 | Computing Service University of Sussex Falmer Brighton East | 33K | GB |
| 139.184.128.0/17 | Computing Service University of Sussex Falmer Brighton East | 33K | GB |
| 144.124.0.0/17 | Aberystwyth University | 33K | GB |
| 163.119.0.0/17 | London Business School Sussex Place Regent's Park London NW1 | 33K | GB |
| 128.41.0.0/18 | University College London Department of Computer Science Gow | 16K | GB |
| 141.163.0.0/18 | The University of Plymouth | 16K | GB |
| 159.86.128.0/18 | PSBA Network Welsh Assembly Government | 16K | GB |
| 192.171.128.0/18 | UKRI / NOC / CEH Aggregate | 16K | GB |
| 136.156.0.0/19 | European Centre for Medium-Range Weather Forecasts Shinfield | 8.2K | GB |
| 137.44.96.0/19 | JANET | 8.2K | GB |
| 141.163.64.0/19 | The University of Plymouth | 8.2K | GB |
| 141.170.64.0/19 | Janet 3G | 8.2K | GB |
| 158.94.0.0/19 | Middlesex University | 8.2K | GB |
| 158.94.224.0/19 | Middlesex University | 8.2K | GB |
| 194.35.192.0/19 | UHI Millennium Institute Executive Office Ness Walk Invernes | 8.2K | GB |
| 212.121.0.0/19 | JANET JANET(UK) Network Operations Centre 100 Gray's Inn Roa | 8.2K | GB |
| 212.121.192.0/19 | Aggregate route for NWLG | 8.2K | GB |
| 92.245.224.0/19 | PSBA Network Welsh Assembly Government | 8.2K | GB |
| 141.163.96.0/20 | The University of Plymouth | 4.1K | GB |
| 192.41.112.0/20 | University of Edinburgh Computing Service Kings Buildings Ed | 4.1K | GB |
| 192.76.16.0/20 | Oxford University Computing Services 13 Banbury Road Oxford | 4.1K | GB |
| 194.32.32.0/20 | Hammersmith Hospital NHS Trust | 4.1K | GB |
| 136.156.160.0/21 | European Centre for Medium-Range Weather Forecasts Shinfield | 2K | GB |
| 136.156.176.0/21 | European Centre for Medium-Range Weather Forecasts Shinfield | 2K | GB |
| 149.170.0.0/21 | Manchester Metropolitan University | 2K | GB |
| 149.170.104.0/21 | Manchester Metropolitan University | 2K | GB |
| 149.170.112.0/21 | Manchester Metropolitan University | 2K | GB |
| 149.170.120.0/21 | Manchester Metropolitan University | 2K | GB |
| 149.170.128.0/21 | Manchester Metropolitan University | 2K | GB |
| 149.170.136.0/21 | Manchester Metropolitan University | 2K | GB |
| 149.170.16.0/21 | Manchester Metropolitan University | 2K | GB |
| 149.170.160.0/21 | Manchester Metropolitan University | 2K | GB |
| 149.170.168.0/21 | Manchester Metropolitan University | 2K | GB |
| 149.170.184.0/21 | Manchester Metropolitan University | 2K | GB |
| 149.170.192.0/21 | Manchester Metropolitan University | 2K | GB |
| 149.170.208.0/21 | Manchester Metropolitan University | 2K | GB |
| 149.170.216.0/21 | Manchester Metropolitan University | 2K | GB |
| 149.170.24.0/21 | Manchester Metropolitan University | 2K | GB |
| 149.170.240.0/21 | Manchester Metropolitan University | 2K | GB |
| 149.170.248.0/21 | Manchester Metropolitan University | 2K | GB |
| 149.170.32.0/21 | Manchester Metropolitan University | 2K | GB |
| 149.170.40.0/21 | Manchester Metropolitan University | 2K | GB |
| 149.170.48.0/21 | Manchester Metropolitan University | 2K | GB |
| 149.170.56.0/21 | Manchester Metropolitan University | 2K | GB |
| 149.170.64.0/21 | Manchester Metropolitan University | 2K | GB |
| 149.170.72.0/21 | Manchester Metropolitan University | 2K | GB |
| 149.170.8.0/21 | Manchester Metropolitan University | 2K | GB |
| 149.170.80.0/21 | Manchester Metropolitan University | 2K | GB |
| 149.170.88.0/21 | Manchester Metropolitan University | 2K | GB |
| 149.170.96.0/21 | Manchester Metropolitan University | 2K | GB |
| 192.171.192.0/21 | UKRI / NOC / CEH Aggregate | 2K | GB |
| 192.173.128.0/21 | University of Brighton Watts Building Lewes Road Mouselecoom | 2K | GB |
| 192.41.104.0/21 | University of Edinburgh Computing Service Kings Buildings Ed | 2K | GB |
| 192.76.8.0/21 | Oxford University Computing Services 13 Banbury Road Oxford | 2K | GB |
| 193.37.240.0/21 | University of Greenwich | 2K | GB |
| 193.39.80.0/21 | Hammersmith Hospital NHS Trust | 2K | GB |
| 194.36.152.0/21 | Halesown College | 2K | GB |
| 46.254.200.0/21 | PSBA Network Welsh Assembly Government | 2K | GB |
| 83.138.32.0/21 | Net Northwest Commercial | 2K | GB |
| 136.156.88.0/22 | European Centre for Medium-Range Weather Forecasts Shinfield | 1K | GB |
| 141.170.96.0/22 | Janet 3G | 1K | GB |
| 185.255.108.0/22 | Imperial College London Exhibition Road London SW7 2BX UNITE | 1K | GB |
| 192.41.128.0/22 | Edinburgh University Computing Service Kings Buildings Mayfi | 1K | GB |
| 192.76.32.0/22 | Oxford University Computing Services 13 Banbury Road Oxford | 1K | GB |
| 192.84.76.0/22 | Manchester University Manchester Computing Centre University | 1K | GB |
| 193.107.116.0/22 | Bedford Borough Council PCD | 1K | GB |
| 193.39.172.0/22 | Gwynedd County Council | 1K | GB |
| 77.241.76.0/22 | University College London Gower Street London WC1E 6BT UNITE | 1K | GB |
| 141.170.100.0/23 | Janet 3G | 512 | GB |
| 192.173.2.0/23 | University of Northumbria at Newcastle Computer Unit Northum | 512 | GB |
| 192.195.116.0/23 | Wye College | 512 | GB |
| 192.195.42.0/23 | JANET JANET(UK) Network Operations Centre 15 Fetter Lane Lon | 512 | GB |
| 192.76.6.0/23 | Oxford University Computing Services 13 Banbury Road Oxford | 512 | GB |
| 193.133.28.0/23 | Chichester College Group | 512 | GB |
| 194.36.2.0/23 | Manchester University Department of Physics | 512 | GB |
| 45.88.80.0/23 | JANET | 512 | GB |
| 192.100.78.0/24 | Rutherford Appleton Laboratory Chilton Didcot Oxon OX11 0QX | 256 | GB |
| 192.107.168.0/24 | Medical Research Council National Institute for Medical Rese | 256 | GB |
| 192.108.120.0/24 | Royal Observatory Edinburgh Blackford Hill Edinburgh EH9 3HJ | 256 | GB |
| 192.12.72.0/24 | University of London Computer Centre | 256 | GB |
| 192.124.46.0/24 | JANET | 256 | GB |
| 192.133.244.0/24 | University of Reading Whiteknights Reading Berkshire RG6 2AX | 256 | GB |
| 192.149.111.0/24 | Wye College | 256 | GB |
| 192.150.184.0/24 | Network Unit University of Manchester Oxford Road Manchester | 256 | GB |
| 192.153.213.0/24 | University of Cambridge Computer Laboratory New Museum Site | 256 | GB |
| 192.156.162.0/24 | Imperial College of Science and Technology South Kensington | 256 | GB |
| 192.171.139.0/24 | JANET | 256 | GB |
| 192.173.1.0/24 | University of Northumbria at Newcastle Ellison Place Newcast | 256 | GB |
| 192.173.4.0/24 | University of Northumbria at Newcastle Ellison Place Newcast | 256 | GB |
| 192.18.195.0/24 | Medical Research Council - Cognition and Brain Sciences Unit | 256 | GB |
| 192.190.201.0/24 | Leeds Trinity University | 256 | GB |
| 192.190.202.0/24 | Leeds Trinity University | 256 | GB |
| 192.195.105.0/24 | Charing Cross and Westminster Medical School London UNITED K | 256 | GB |
| 192.195.118.0/24 | Wye College | 256 | GB |
| 192.35.172.0/24 | JANET | 256 | GB |
| 192.41.103.0/24 | Edinburgh University Computing Service Kings Buildings Mayfi | 256 | GB |
| 192.42.100.0/24 | Keele University Dept of Computer Science Keele Staffordshir | 256 | GB |
| 192.68.153.0/24 | Medical Research Council Clinical Research Centre Watford Ro | 256 | GB |
| 192.82.153.0/24 | Medical Research Council Molecular Genetics Unit Hills Road | 256 | GB |
| 192.84.5.0/24 | Medical Research Council Biostatistics Unit Cambridge Univer | 256 | GB |
| 192.84.75.0/24 | Network Unit University of Manchester Oxford Road Manchester | 256 | GB |
| 192.88.10.0/24 | University of Wales - Aberystwyth Aberystwyth Dyfed Wales SY | 256 | GB |
| 192.88.9.0/24 | University of Wales - Aberystwyth Aberystwyth Dyfed Wales SY | 256 | GB |
| 192.94.235.0/24 | North East Wales Institute Plas Coch Mold Road Wrexham Clywd | 256 | GB |
| 193.130.15.0/24 | NAT-LIB-SCOT | 256 | GB |
| 193.138.86.0/24 | Traffic Wales | 256 | GB |
| 193.142.216.0/24 | Stoke-on-Trent County Council | 256 | GB |
| 193.32.22.0/24 | Charing Cross Hospital Medical School Department Computing a | 256 | GB |
| 193.37.225.0/24 | Science Research Foundation University of Bristol Tyndall Av | 256 | GB |
| 193.38.143.0/24 | Thurrock College | 256 | GB |
| 193.39.212.0/24 | Institute of Historical Research Senate House Malet Street L | 256 | GB |
| 194.35.186.0/24 | Germanischer Lloyd Industrial Services UK Ltd Holywell Park | 256 | GB |
| 194.35.241.0/24 | Norwich University of the Arts | 256 | GB |
| 194.35.93.0/24 | Ravensbourne 6 Penrose Way London SE10 0EW UNITED KINGDOM | 256 | GB |
| 194.36.1.0/24 | Glasgow University High Energy Physics Glasgow Scotland G12 | 256 | GB |
| 194.36.121.0/24 | HARDY-IP | 256 | GB |
| 194.60.218.0/24 | The Isle of Wight College Medina Way Newport PO30 5TA | 256 | GB |