L'indirizzo IP 51.55.21 è fornito da Microsoft Corporation, che è di proprietà del CIDR (Classless Inter-Domain Routing) 51.103.0.0/16, IP tra 51.103.0.0 a 51.103.255.255 ). Il numero di sistema autonomo (ASN) è 8075.
| ASN | 8075 |
| IP inizia con | 51.103.0.0 |
| IP finale con | 51.103.255.255 |
| ASN Nome | Microsoft Corporation |
| CDIR | 51.103.0.0/16 |
| IP numerico | |
| Registe | arin |
| Ultimo aggiornamento | 31/10/2019 |

| Codice paese | Paese | Regione | Città | Latitude | Longitude | Ultimo aggiornamento | |
| IP2Location | GB | United Kingdom | - | London | 51,5085 | -0,1257 | 2019-10-31 |
| MaxMind | GB | United Kingdom | - | - | 51,4964 | -0,1224 | 2019-10-31 |
| Whois | US | - | - | - | -96 | 37 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 51.55.21.0 | 859247872 | 0 |
| 51.55.21.1 | 859247873 | 0 |
| 51.55.21.2 | 859247874 | 0 |
| 51.55.21.3 | 859247875 | 0 |
| 51.55.21.4 | 859247876 | 0 |
| 51.55.21.5 | 859247877 | 0 |
| 51.55.21.6 | 859247878 | 0 |
| 51.55.21.7 | 859247879 | 0 |
| 51.55.21.8 | 859247880 | 0 |
| 51.55.21.9 | 859247881 | 0 |
| 51.55.21.10 | 859247882 | 0 |
| 51.55.21.11 | 859247883 | 0 |
| 51.55.21.12 | 859247884 | 0 |
| 51.55.21.13 | 859247885 | 0 |
| 51.55.21.14 | 859247886 | 0 |
| 51.55.21.15 | 859247887 | 0 |
| 51.55.21.16 | 859247888 | 0 |
| 51.55.21.17 | 859247889 | 0 |
| 51.55.21.18 | 859247890 | 0 |
| 51.55.21.19 | 859247891 | 0 |
| 51.55.21.20 | 859247892 | 0 |
| 51.55.21.21 | 859247893 | 0 |
| 51.55.21.22 | 859247894 | 0 |
| 51.55.21.23 | 859247895 | 0 |
| 51.55.21.24 | 859247896 | 0 |
| 51.55.21.25 | 859247897 | 0 |
| 51.55.21.26 | 859247898 | 0 |
| 51.55.21.27 | 859247899 | 0 |
| 51.55.21.28 | 859247900 | 0 |
| 51.55.21.29 | 859247901 | 0 |
| 51.55.21.30 | 859247902 | 0 |
| 51.55.21.31 | 859247903 | 0 |
| 51.55.21.32 | 859247904 | 0 |
| 51.55.21.33 | 859247905 | 0 |
| 51.55.21.34 | 859247906 | 0 |
| 51.55.21.35 | 859247907 | 0 |
| 51.55.21.36 | 859247908 | 0 |
| 51.55.21.37 | 859247909 | 0 |
| 51.55.21.38 | 859247910 | 0 |
| 51.55.21.39 | 859247911 | 0 |
| 51.55.21.40 | 859247912 | 0 |
| 51.55.21.41 | 859247913 | 0 |
| 51.55.21.42 | 859247914 | 0 |
| 51.55.21.43 | 859247915 | 0 |
| 51.55.21.44 | 859247916 | 0 |
| 51.55.21.45 | 859247917 | 0 |
| 51.55.21.46 | 859247918 | 0 |
| 51.55.21.47 | 859247919 | 0 |
| 51.55.21.48 | 859247920 | 0 |
| 51.55.21.49 | 859247921 | 0 |
| 51.55.21.50 | 859247922 | 0 |
| 51.55.21.51 | 859247923 | 0 |
| 51.55.21.52 | 859247924 | 0 |
| 51.55.21.53 | 859247925 | 0 |
| 51.55.21.54 | 859247926 | 0 |
| 51.55.21.55 | 859247927 | 0 |
| 51.55.21.56 | 859247928 | 0 |
| 51.55.21.57 | 859247929 | 0 |
| 51.55.21.58 | 859247930 | 0 |
| 51.55.21.59 | 859247931 | 0 |
| 51.55.21.60 | 859247932 | 0 |
| 51.55.21.61 | 859247933 | 0 |
| 51.55.21.62 | 859247934 | 0 |
| 51.55.21.63 | 859247935 | 0 |
| 51.55.21.64 | 859247936 | 0 |
| 51.55.21.65 | 859247937 | 0 |
| 51.55.21.66 | 859247938 | 0 |
| 51.55.21.67 | 859247939 | 0 |
| 51.55.21.68 | 859247940 | 0 |
| 51.55.21.69 | 859247941 | 0 |
| 51.55.21.70 | 859247942 | 0 |
| 51.55.21.71 | 859247943 | 0 |
| 51.55.21.72 | 859247944 | 0 |
| 51.55.21.73 | 859247945 | 0 |
| 51.55.21.74 | 859247946 | 0 |
| 51.55.21.75 | 859247947 | 0 |
| 51.55.21.76 | 859247948 | 0 |
| 51.55.21.77 | 859247949 | 0 |
| 51.55.21.78 | 859247950 | 0 |
| 51.55.21.79 | 859247951 | 0 |
| 51.55.21.80 | 859247952 | 0 |
| 51.55.21.81 | 859247953 | 0 |
| 51.55.21.82 | 859247954 | 0 |
| 51.55.21.83 | 859247955 | 0 |
| 51.55.21.84 | 859247956 | 0 |
| 51.55.21.85 | 859247957 | 0 |