| 45.88.80.0/23 | European Bioinformatics Institute (EMBL-EBI) | Saffron Walden | Sin ROA | 1 |
| 46.254.200.0/21 | | Aberdare | Sin ROA | 1 |
| 77.241.76.0/22 | | Stratford | Sin ROA | 1 |
| 81.87.0.0/16 | | Canterbury | RPKI válido | 1 |
| 83.138.32.0/21 | | | RPKI válido | 1 |
| 87.38.202.0/24 | | Dublin | RPKI válido | 1 |
| 92.245.224.0/19 | | | Sin ROA | 1 |
| 128.16.0.0/16 | London, WC1E 6BT | New Addington | Sin ROA | 1 |
| 128.40.0.0/16 | University College London | Sidcup | Sin ROA | 1 |
| 128.41.0.0/18 | London, WC1E 6BT | Brighton | Sin ROA | 1 |
| 128.86.0.0/17 | | | RPKI válido | 1 |
| 128.86.128.0/17 | | | RPKI válido | 1 |
| 128.232.0.0/16 | Cambridge CB3 0FD | Cambridge | Sin ROA | 1 |
| 128.240.0.0/16 | United Kingdom | | RPKI válido | 1 |
| 128.243.0.0/16 | The University of Nottingham | Nottingham | Sin ROA | 1 |
| 129.11.0.0/16 | Leeds University | Leeds | RPKI válido | 1 |
| 129.12.0.0/16 | University of Kent | Canterbury | RPKI válido | 1 |
| 129.31.0.0/16 | | | Sin ROA | 1 |
| 129.67.0.0/16 | Oxford University | Oxford | RPKI válido | 1 |
| 129.169.0.0/16 | UNITED KINGDOM | Cambridge | Sin ROA | 1 |
| 129.215.0.0/16 | The Edinburgh University | Edinburgh | RPKI válido | 1 |
| 129.234.0.0/16 | University of Durham | Durham | Sin ROA | 1 |
| 130.88.0.0/16 | The University of Manchester Local Area Network | Manchester | Sin ROA | 1 |
| 130.159.0.0/16 | University of Strathclyde | Glasgow | RPKI válido | 1 |
| 130.209.0.0/16 | G12 8QQ | Glasgow | Sin ROA | 1 |
| 130.246.0.0/16 | Rutherford Appleton Laboratory | Wantage | Sin ROA | 1 |
| 131.111.0.0/16 | University of Cambridge | Cambridge | Sin ROA | 1 |
| 131.227.0.0/16 | University of Surrey | Guildford | Sin ROA | 1 |
| 131.231.0.0/16 | Loughborough University | Loughborough | RPKI válido | 1 |
| 131.251.0.0/16 | Cardiff University | Cardiff | Sin ROA | 1 |
| 134.36.0.0/16 | University of Dundee | Dundee | Sin ROA | 1 |
| 134.83.0.0/16 | | Uxbridge | RPKI válido | 1 |
| 134.151.0.0/16 | Birmingham, B4 7ET | Birmingham | RPKI válido | 1 |
| 134.219.0.0/16 | Egham, Surrey TW20 0EX | | Sin ROA | 1 |
| 134.220.0.0/16 | West Midlands WV1 1AD | Wolverhampton | RPKI válido | 1 |
| 134.225.0.0/16 | | Reading | RPKI válido | 1 |
| 136.148.32.0/19 | | | Sin ROA | 1 |
| 136.148.104.0/21 | | | Sin ROA | 1 |
| 136.148.112.0/20 | | | Sin ROA | 1 |
| 136.148.224.0/19 | | | Sin ROA | 1 |
| 136.156.0.0/19 | European Centre for Medium-Range Weather Forecasts | | Sin ROA | 1 |
| 136.156.88.0/22 | European Centre for Medium-Range Weather Forecasts | | Sin ROA | 1 |
| 136.156.160.0/21 | European Centre for Medium-Range Weather Forecasts | | Sin ROA | 1 |
| 136.156.176.0/21 | European Centre for Medium-Range Weather Forecasts | | Sin ROA | 1 |
| 137.44.0.0/18 | | Swansea | Sin ROA | 1 |
| 137.50.0.0/16 | University of Aberdeen, UK | Aberdeen | RPKI válido | 1 |
| 137.73.0.0/16 | King's College London | | RPKI válido | 1 |
| 137.108.0.0/16 | Open University | Milton Keynes | Sin ROA | 1 |
| 137.195.0.0/16 | Heriot-Watt University | Edinburgh | Sin ROA | 1 |
| 137.222.0.0/16 | University of Bristol | Bristol | RPKI válido | 1 |
| 137.253.0.0/16 | | Wood Green | RPKI válido | 1 |
| 138.38.0.0/16 | BA2 7AY | Bath | Sin ROA | 1 |
| 138.40.0.0/16 | City, University of London | Hackney | RPKI válido | 1 |
| 138.250.0.0/15 | The whole IPv4 address space | Milton Keynes | Sin ROA | 1 |
| 138.253.0.0/16 | University of Liverpool (NET-LIVNET) | Liverpool | Sin ROA | 1 |
| 139.133.0.0/16 | University of Aberdeen | Aberdeen | RPKI válido | 1 |
| 139.153.0.0/16 | | Stirling | RPKI válido | 1 |
| 139.166.0.0/16 | SN2 1EU | Southampton | RPKI válido | 1 |
| 139.184.0.0/16 | University of Sussex | Royal Tunbridge Wells | RPKI válido | 1 |
| 139.184.0.0/17 | University of Sussex | Royal Tunbridge Wells | RPKI válido | 1 |
| 139.184.128.0/17 | University of Sussex | Brighton | RPKI válido | 1 |
| 139.222.0.0/16 | NR4 7TJ | Norwich | Sin ROA | 1 |
| 140.97.0.0/16 | London Metropolitan University | | Sin ROA | 1 |
| 141.163.0.0/18 | | Plymouth | Sin ROA | 1 |
| 141.163.64.0/19 | | Plymouth | Sin ROA | 1 |
| 141.163.96.0/20 | | | Sin ROA | 1 |
| 141.241.0.0/16 | KT1 2EE | | Sin ROA | 1 |
| 143.52.0.0/15 | The whole IPv4 address space | Sheffield | Sin ROA | 1 |
| 143.117.0.0/16 | Queens University Belfast | Lisburn | Sin ROA | 1 |
| 143.167.0.0/16 | University of Sheffield | Hull | RPKI válido | 1 |
| 143.210.0.0/16 | University of Leicester | Leicester | Sin ROA | 1 |
| 143.234.0.0/16 | Scottish Agricultural & Biological Research Institutes | Aberdeen | Sin ROA | 1 |
| 144.32.0.0/16 | University of York | Stockport | Sin ROA | 1 |
| 144.82.0.0/16 | The Bloomsbury Computing Consortium | Camden | Sin ROA | 1 |
| 144.124.0.0/17 | | | Sin ROA | 1 |
| 144.173.0.0/16 | Devon EX4 4QE | Exeter | Sin ROA | 1 |
| 146.87.0.0/16 | | | RPKI válido | 1 |
| 146.97.0.0/16 | Jisc Services Limited | | RPKI válido | 1 |
| 146.169.0.0/16 | | Harrow | Sin ROA | 1 |
| 146.176.0.0/16 | | Edinburgh | RPKI válido | 1 |
| 146.179.0.0/16 | | Kensington | Sin ROA | 1 |
| 146.191.0.0/16 | University of The West Of Scotland | | Sin ROA | 1 |
| 146.227.0.0/16 | | | RPKI válido | 1 |
| 147.143.0.0/16 | University of Wales Bangor | Bangor | Sin ROA | 1 |
| 147.188.0.0/16 | Birmingham, B15 2TT | West Hagley | RPKI válido | 1 |
| 147.197.0.0/16 | University of Hertfordshire | Stevenage | Sin ROA | 1 |
| 148.79.0.0/16 | Daresbury Laboratory Site Network | Warrington | Sin ROA | 1 |
| 148.88.0.0/16 | Lancaster | | RPKI válido | 1 |
| 148.197.0.0/16 | Portsmouth, Hants PO1 2PR | Southsea | Sin ROA | 1 |
| 149.155.0.0/16 | Biotechnology And Biological Science Research Council | Hatfield | Sin ROA | 1 |
| 149.170.0.0/21 | | Manchester | Sin ROA | 1 |
| 149.170.8.0/21 | | Manchester | Sin ROA | 1 |
| 149.170.16.0/21 | | Manchester | Sin ROA | 1 |
| 149.170.24.0/21 | | Manchester | Sin ROA | 1 |
| 149.170.32.0/21 | | | Sin ROA | 1 |
| 149.170.40.0/21 | | | Sin ROA | 1 |
| 149.170.48.0/21 | | | Sin ROA | 1 |
| 149.170.64.0/21 | | Salford | Sin ROA | 1 |
| 149.170.72.0/21 | | Salford | Sin ROA | 1 |
| 149.170.80.0/21 | | Clitheroe | Sin ROA | 1 |
| 149.170.88.0/21 | | Clitheroe | Sin ROA | 1 |
| 149.170.96.0/21 | | Salford | Sin ROA | 1 |
| 149.170.104.0/21 | | Salford | Sin ROA | 1 |
| 149.170.112.0/21 | | Stockport | Sin ROA | 1 |
| 149.170.120.0/21 | | Stockport | Sin ROA | 1 |
| 149.170.128.0/21 | | | Sin ROA | 1 |
| 149.170.136.0/21 | | | Sin ROA | 1 |
| 149.170.160.0/21 | | | Sin ROA | 1 |
| 149.170.184.0/21 | | | Sin ROA | 1 |
| 149.170.192.0/21 | | | Sin ROA | 1 |
| 149.170.208.0/21 | | | Sin ROA | 1 |
| 149.170.216.0/21 | | | Sin ROA | 1 |
| 149.170.240.0/21 | | Manchester | Sin ROA | 1 |
| 149.170.248.0/21 | | Manchester | Sin ROA | 1 |
| 150.204.0.0/16 | Liverpool John Moores University | Liverpool | RPKI válido | 1 |
| 152.71.0.0/16 | Nottingham Trent University | Nottingham | RPKI válido | 1 |
| 152.78.0.0/16 | University of Southampton | Southampton | Sin ROA | 1 |
| 152.105.0.0/16 | University of Teesside | Saltburn-by-the-Sea | Sin ROA | 1 |
| 155.198.0.0/16 | | Epsom | Sin ROA | 1 |
| 155.245.0.0/16 | University of Essex | Colchester | Sin ROA | 1 |
| 157.140.0.0/16 | Natural History Museum | Eltham | Sin ROA | 1 |
| 157.228.0.0/20 | | Sunderland | Sin ROA | 1 |
| 158.94.0.0/19 | | Hendon | RPKI válido | 1 |
| 158.94.224.0/19 | | | RPKI válido | 1 |
| 158.125.0.0/16 | Loughborough University | Loughborough | RPKI válido | 1 |
| 158.143.0.0/16 | London School of Economics and Political Science | Slough | RPKI válido | 1 |
| 158.223.0.0/16 | Goldsmiths, University of London | Lewisham | RPKI válido | 1 |
| 159.86.0.0/16 | | | Sin ROA | 1 |
| 159.86.128.0/18 | | Cardiff | Sin ROA | 1 |
| 160.5.248.0/21 | | Newcastle-under-Lyme | Sin ROA | 1 |
| 160.9.0.0/16 | LS1 3HE | Leeds | RPKI válido | 1 |
| 161.73.0.0/16 | Oxford Brookes University | Oxford | Sin ROA | 1 |
| 161.74.0.0/16 | London, W1W 6UW | London | Sin ROA | 1 |
| 161.76.0.0/16 | University of East London | East Ham | RPKI válido | 1 |
| 161.112.0.0/16 | Huddersfield, HD1 3DH | Huddersfield | Sin ROA | 1 |
| 163.1.0.0/16 | Oxford University | Oxford | RPKI válido | 1 |
| 163.119.0.0/17 | | Camden | RPKI válido | 1 |
| 163.167.0.0/16 | London Metropolitan University | Lewisham | Sin ROA | 1 |
| 164.11.0.0/16 | Bristol, BS16 1QY | Bristol | Sin ROA | 1 |
| 185.255.108.0/22 | | | Sin ROA | 1 |
| 192.12.72.0/24 | | | RPKI válido | 1 |
| 192.18.195.0/24 | Medical Research Council - Cognition and Brain Sciences Unit | | Sin ROA | 1 |
| 192.41.103.0/24 | The Edinburgh University | | RPKI válido | 1 |
| 192.41.104.0/21 | The Edinburgh University | | RPKI válido | 1 |
| 192.41.112.0/20 | The Edinburgh University | Edinburgh | RPKI válido | 1 |
| 192.41.128.0/22 | The Edinburgh University | Kelso | RPKI válido | 1 |
| 192.42.100.0/24 | | | Sin ROA | 1 |
| 192.65.28.0/23 | | | RPKI válido | 1 |
| 192.68.153.0/24 | Imperial College at Northwick Park Hospital | | Sin ROA | 1 |
| 192.76.6.0/23 | OX2 6NN | | RPKI válido | 1 |
| 192.76.8.0/21 | OX2 6NN | Oxford | RPKI válido | 1 |
| 192.76.16.0/20 | The whole IPv4 address space | Oxford | RPKI válido | 1 |
| 192.76.32.0/22 | OX2 6NN | | RPKI válido | 1 |
| 192.82.153.0/24 | Medical Research Council Human Genetics Unit | | Sin ROA | 1 |
| 192.84.5.0/24 | University of Cambridge | | Sin ROA | 1 |
| 192.84.75.0/24 | The University of Manchester | | Sin ROA | 1 |
| 192.84.76.0/22 | The whole IPv4 address space | | Sin ROA | 1 |
| 192.88.9.0/24 | | | Sin ROA | 1 |
| 192.94.235.0/24 | Glyndwr University | Wrexham | Sin ROA | 1 |
| 192.100.78.0/24 | Rutherford Appleton Laboratory LAN for CRAY | | Sin ROA | 1 |
| 192.107.168.0/24 | EH4 2XU | | Sin ROA | 1 |
| 192.108.120.0/24 | Royal Observatory Edinburgh | | Sin ROA | 1 |
| 192.124.46.0/24 | London WC2A 2AE | | RPKI válido | 1 |
| 192.133.244.0/24 | | | RPKI válido | 1 |
| 192.149.111.0/24 | | | Sin ROA | 1 |
| 192.150.184.0/24 | The University of Manchester | | Sin ROA | 1 |
| 192.153.213.0/24 | University of Cambridge | Cambridge | Sin ROA | 1 |
| 192.156.162.0/24 | | | Sin ROA | 1 |
| 192.171.128.0/18 | The whole IPv4 address space | Nottingham | Sin ROA | 1 |
| 192.171.192.0/21 | The whole IPv4 address space | Plymouth | Sin ROA | 1 |
| 192.173.1.0/24 | NE1 8ST | | Sin ROA | 1 |
| 192.173.2.0/23 | The whole IPv4 address space | | Sin ROA | 1 |
| 192.173.4.0/24 | NE1 8ST | | Sin ROA | 1 |
| 192.173.128.0/21 | | Brighton | RPKI válido | 1 |
| 192.190.201.0/24 | LS18 5HD | | RPKI válido | 1 |
| 192.190.202.0/24 | LS18 5HD | | RPKI válido | 1 |
| 192.195.42.0/23 | BT37 OQB | | RPKI válido | 1 |
| 192.195.105.0/24 | | | Sin ROA | 1 |
| 192.195.116.0/23 | | | Sin ROA | 1 |
| 192.195.118.0/24 | | | Sin ROA | 1 |
| 193.32.22.0/24 | Riverside Health | Ealing | RPKI válido | 1 |
| 193.37.225.0/24 | | Bristol | RPKI válido | 1 |
| 193.37.240.0/21 | | | RPKI válido | 1 |
| 193.38.143.0/24 | South Essex College of Further and Higher Education | Grays | RPKI válido | 1 |
| 193.39.80.0/21 | | Kensington | RPKI válido | 1 |
| 193.39.172.0/22 | | Caernarfon | Sin ROA | 1 |
| 193.39.212.0/24 | University of London | | RPKI válido | 1 |
| 193.60.0.0/14 | | Thamesmead | RPKI válido | 1 |
| 193.107.116.0/22 | | Fenny Compton | RPKI válido | 1 |
| 193.130.15.0/24 | National Library of Scotland | Broxburn | Sin ROA | 1 |
| 193.133.28.0/23 | Chichester College Group | Southsea | RPKI válido | 1 |
| 193.138.86.0/24 | | | Sin ROA | 1 |
| 193.142.216.0/24 | | | Sin ROA | 1 |
| 194.32.32.0/20 | | | RPKI válido | 1 |
| 194.35.93.0/24 | | Ilford | RPKI válido | 1 |
| 194.35.186.0/24 | | | Sin ROA | 1 |
| 194.35.192.0/19 | University of the Highlands and Islands | Perth | RPKI válido | 1 |
| 194.35.241.0/24 | | | RPKI válido | 1 |
| 194.36.1.0/24 | UK High Energy Physics Glasgow network | | RPKI válido | 1 |
| 194.36.2.0/23 | | | Sin ROA | 1 |