Les adresses IP débutant par 131.223.0 sont fournies par SURFnet, elles appartiennent au CIDR (Classless Inter-Domain Routing) 131.224.0.0/16, le bloc IP comprant les adresses de 131.224.0.0 à 131.224.255.255). Le numéro de système autonome (ASN) est 1103.
| ASN | 1103 |
| IP commençant par | 131.224.0.0 |
| IP se terminant par | 131.224.255.255 |
| Nom ASN | SURFnet |
| CDIR | 131.224.0.0/16 |
| IP numérique | |
| Registe | ripencc |
| Dernière mise à jour | 25/03/2020 |

| Code pays | Pays | Région | Ville | Latitude | Longitude | Dernière mise à jour | |
| IP2Location | NL | Pays-Bas | - | Bilthoven | 52,1283 | 5,1986 | 2020-03-25 |
| MaxMind | NL | Pays-Bas | - | - | 52,3824 | 4,8995 | 2020-03-25 |
| Whois | NL | - | - | - | 5 | 52 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 131.223.0.0 | 2212429824 | 0 |
| 131.223.0.1 | 2212429825 | 0 |
| 131.223.0.2 | 2212429826 | 0 |
| 131.223.0.3 | 2212429827 | 0 |
| 131.223.0.4 | 2212429828 | 0 |
| 131.223.0.5 | 2212429829 | 0 |
| 131.223.0.6 | 2212429830 | 0 |
| 131.223.0.7 | 2212429831 | 0 |
| 131.223.0.8 | 2212429832 | 0 |
| 131.223.0.9 | 2212429833 | 0 |
| 131.223.0.10 | 2212429834 | 0 |
| 131.223.0.11 | 2212429835 | 0 |
| 131.223.0.12 | 2212429836 | 0 |
| 131.223.0.13 | 2212429837 | 0 |
| 131.223.0.14 | 2212429838 | 0 |
| 131.223.0.15 | 2212429839 | 0 |
| 131.223.0.16 | 2212429840 | 0 |
| 131.223.0.17 | 2212429841 | 0 |
| 131.223.0.18 | 2212429842 | 0 |
| 131.223.0.19 | 2212429843 | 0 |
| 131.223.0.20 | 2212429844 | 0 |
| 131.223.0.21 | 2212429845 | 0 |
| 131.223.0.22 | 2212429846 | 0 |
| 131.223.0.23 | 2212429847 | 0 |
| 131.223.0.24 | 2212429848 | 0 |
| 131.223.0.25 | 2212429849 | 0 |
| 131.223.0.26 | 2212429850 | 0 |
| 131.223.0.27 | 2212429851 | 0 |
| 131.223.0.28 | 2212429852 | 0 |
| 131.223.0.29 | 2212429853 | 0 |
| 131.223.0.30 | 2212429854 | 0 |
| 131.223.0.31 | 2212429855 | 0 |
| 131.223.0.32 | 2212429856 | 0 |
| 131.223.0.33 | 2212429857 | 0 |
| 131.223.0.34 | 2212429858 | 0 |
| 131.223.0.35 | 2212429859 | 0 |
| 131.223.0.36 | 2212429860 | 0 |
| 131.223.0.37 | 2212429861 | 0 |
| 131.223.0.38 | 2212429862 | 0 |
| 131.223.0.39 | 2212429863 | 0 |
| 131.223.0.40 | 2212429864 | 0 |
| 131.223.0.41 | 2212429865 | 0 |
| 131.223.0.42 | 2212429866 | 0 |
| 131.223.0.43 | 2212429867 | 0 |
| 131.223.0.44 | 2212429868 | 0 |
| 131.223.0.45 | 2212429869 | 0 |
| 131.223.0.46 | 2212429870 | 0 |
| 131.223.0.47 | 2212429871 | 0 |
| 131.223.0.48 | 2212429872 | 0 |
| 131.223.0.49 | 2212429873 | 0 |
| 131.223.0.50 | 2212429874 | 0 |
| 131.223.0.51 | 2212429875 | 0 |
| 131.223.0.52 | 2212429876 | 0 |
| 131.223.0.53 | 2212429877 | 0 |
| 131.223.0.54 | 2212429878 | 0 |
| 131.223.0.55 | 2212429879 | 0 |
| 131.223.0.56 | 2212429880 | 0 |
| 131.223.0.57 | 2212429881 | 0 |
| 131.223.0.58 | 2212429882 | 0 |
| 131.223.0.59 | 2212429883 | 0 |
| 131.223.0.60 | 2212429884 | 0 |
| 131.223.0.61 | 2212429885 | 0 |
| 131.223.0.62 | 2212429886 | 0 |
| 131.223.0.63 | 2212429887 | 0 |
| 131.223.0.64 | 2212429888 | 0 |
| 131.223.0.65 | 2212429889 | 0 |
| 131.223.0.66 | 2212429890 | 0 |
| 131.223.0.67 | 2212429891 | 0 |
| 131.223.0.68 | 2212429892 | 0 |
| 131.223.0.69 | 2212429893 | 0 |
| 131.223.0.70 | 2212429894 | 0 |
| 131.223.0.71 | 2212429895 | 0 |
| 131.223.0.72 | 2212429896 | 0 |
| 131.223.0.73 | 2212429897 | 0 |
| 131.223.0.74 | 2212429898 | 0 |
| 131.223.0.75 | 2212429899 | 0 |
| 131.223.0.76 | 2212429900 | 0 |
| 131.223.0.77 | 2212429901 | 0 |
| 131.223.0.78 | 2212429902 | 0 |
| 131.223.0.79 | 2212429903 | 0 |
| 131.223.0.80 | 2212429904 | 0 |
| 131.223.0.81 | 2212429905 | 0 |
| 131.223.0.82 | 2212429906 | 0 |
| 131.223.0.83 | 2212429907 | 0 |
| 131.223.0.84 | 2212429908 | 0 |
| 131.223.0.85 | 2212429909 | 0 |