Les adresses IP débutant par 81.77.231 sont fournies par UK Backbone Network, elles appartiennent au CIDR (Classless Inter-Domain Routing) 81.76.192.0/20, le bloc IP comprant les adresses de 81.76.192.0 à 81.76.207.255). Le numéro de système autonome (ASN) est 5388.
| ASN | 5388 |
| IP commençant par | 81.76.192.0 |
| IP se terminant par | 81.76.207.255 |
| Nom ASN | UK Backbone Network |
| CDIR | 81.76.192.0/20 |
| IP numérique | |
| Registe | ripencc |
| Dernière mise à jour | 04/07/2017 |

| Code pays | Pays | Région | Ville | Latitude | Longitude | Dernière mise à jour | |
| IP2Location | GB | Royaume-Uni | - | Leeds | 51,2468 | 0,6068 | 2017-07-04 |
| MaxMind | GB | Royaume-Uni | - | - | 51,4964 | -0,1224 | 2017-07-04 |
| Whois | GB | - | - | - | -3 | 55 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 81.77.231.0 | 1364059904 | 0 |
| 81.77.231.1 | 1364059905 | 0 |
| 81.77.231.2 | 1364059906 | 0 |
| 81.77.231.3 | 1364059907 | 0 |
| 81.77.231.4 | 1364059908 | 0 |
| 81.77.231.5 | 1364059909 | 0 |
| 81.77.231.6 | 1364059910 | 0 |
| 81.77.231.7 | 1364059911 | 0 |
| 81.77.231.8 | 1364059912 | 0 |
| 81.77.231.9 | 1364059913 | 0 |
| 81.77.231.10 | 1364059914 | 0 |
| 81.77.231.11 | 1364059915 | 0 |
| 81.77.231.12 | 1364059916 | 0 |
| 81.77.231.13 | 1364059917 | 0 |
| 81.77.231.14 | 1364059918 | 0 |
| 81.77.231.15 | 1364059919 | 0 |
| 81.77.231.16 | 1364059920 | 0 |
| 81.77.231.17 | 1364059921 | 0 |
| 81.77.231.18 | 1364059922 | 0 |
| 81.77.231.19 | 1364059923 | 0 |
| 81.77.231.20 | 1364059924 | 0 |
| 81.77.231.21 | 1364059925 | 0 |
| 81.77.231.22 | 1364059926 | 0 |
| 81.77.231.23 | 1364059927 | 0 |
| 81.77.231.24 | 1364059928 | 0 |
| 81.77.231.25 | 1364059929 | 0 |
| 81.77.231.26 | 1364059930 | 0 |
| 81.77.231.27 | 1364059931 | 0 |
| 81.77.231.28 | 1364059932 | 0 |
| 81.77.231.29 | 1364059933 | 0 |
| 81.77.231.30 | 1364059934 | 0 |
| 81.77.231.31 | 1364059935 | 0 |
| 81.77.231.32 | 1364059936 | 0 |
| 81.77.231.33 | 1364059937 | 0 |
| 81.77.231.34 | 1364059938 | 0 |
| 81.77.231.35 | 1364059939 | 0 |
| 81.77.231.36 | 1364059940 | 0 |
| 81.77.231.37 | 1364059941 | 0 |
| 81.77.231.38 | 1364059942 | 0 |
| 81.77.231.39 | 1364059943 | 0 |
| 81.77.231.40 | 1364059944 | 0 |
| 81.77.231.41 | 1364059945 | 0 |
| 81.77.231.42 | 1364059946 | 0 |
| 81.77.231.43 | 1364059947 | 0 |
| 81.77.231.44 | 1364059948 | 0 |
| 81.77.231.45 | 1364059949 | 0 |
| 81.77.231.46 | 1364059950 | 0 |
| 81.77.231.47 | 1364059951 | 0 |
| 81.77.231.48 | 1364059952 | 0 |
| 81.77.231.49 | 1364059953 | 0 |
| 81.77.231.50 | 1364059954 | 0 |
| 81.77.231.51 | 1364059955 | 0 |
| 81.77.231.52 | 1364059956 | 0 |
| 81.77.231.53 | 1364059957 | 0 |
| 81.77.231.54 | 1364059958 | 0 |
| 81.77.231.55 | 1364059959 | 0 |
| 81.77.231.56 | 1364059960 | 0 |
| 81.77.231.57 | 1364059961 | 0 |
| 81.77.231.58 | 1364059962 | 0 |
| 81.77.231.59 | 1364059963 | 0 |
| 81.77.231.60 | 1364059964 | 0 |
| 81.77.231.61 | 1364059965 | 0 |
| 81.77.231.62 | 1364059966 | 0 |
| 81.77.231.63 | 1364059967 | 0 |
| 81.77.231.64 | 1364059968 | 0 |
| 81.77.231.65 | 1364059969 | 0 |
| 81.77.231.66 | 1364059970 | 0 |
| 81.77.231.67 | 1364059971 | 0 |
| 81.77.231.68 | 1364059972 | 0 |
| 81.77.231.69 | 1364059973 | 0 |
| 81.77.231.70 | 1364059974 | 0 |
| 81.77.231.71 | 1364059975 | 0 |
| 81.77.231.72 | 1364059976 | 0 |
| 81.77.231.73 | 1364059977 | 0 |
| 81.77.231.74 | 1364059978 | 0 |
| 81.77.231.75 | 1364059979 | 0 |
| 81.77.231.76 | 1364059980 | 0 |
| 81.77.231.77 | 1364059981 | 0 |
| 81.77.231.78 | 1364059982 | 0 |
| 81.77.231.79 | 1364059983 | 0 |
| 81.77.231.80 | 1364059984 | 0 |
| 81.77.231.81 | 1364059985 | 0 |
| 81.77.231.82 | 1364059986 | 0 |
| 81.77.231.83 | 1364059987 | 0 |
| 81.77.231.84 | 1364059988 | 0 |
| 81.77.231.85 | 1364059989 | 0 |