Les adresses IP débutant par 21.83.66 sont fournies par China Education and Research Network Center, elles appartiennent au CIDR (Classless Inter-Domain Routing) 22.30.204.0/23, le bloc IP comprant les adresses de 22.30.204.0 à 22.30.205.255). Le numéro de système autonome (ASN) est 4538.
| ASN | 4538 |
| IP commençant par | 22.30.204.0 |
| IP se terminant par | 22.30.205.255 |
| Nom ASN | China Education and Research Network Center |
| CDIR | 22.30.204.0/23 |
| IP numérique | |
| Registe | |
| Dernière mise à jour | 13/10/2017 |

| Code pays | Pays | Région | Ville | Latitude | Longitude | Dernière mise à jour | |
| IP2Location | US | États-Unis | - | Columbus | 39,9664 | -83,0128 | 2017-10-12 |
| MaxMind | US | États-Unis | - | - | 37,751 | -97,822 | 2017-10-12 |
| Whois | US | - | - | - | -96 | 37 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 21.83.66.0 | 357777920 | 0 |
| 21.83.66.1 | 357777921 | 0 |
| 21.83.66.2 | 357777922 | 0 |
| 21.83.66.3 | 357777923 | 0 |
| 21.83.66.4 | 357777924 | 0 |
| 21.83.66.5 | 357777925 | 0 |
| 21.83.66.6 | 357777926 | 0 |
| 21.83.66.7 | 357777927 | 0 |
| 21.83.66.8 | 357777928 | 0 |
| 21.83.66.9 | 357777929 | 0 |
| 21.83.66.10 | 357777930 | 0 |
| 21.83.66.11 | 357777931 | 0 |
| 21.83.66.12 | 357777932 | 0 |
| 21.83.66.13 | 357777933 | 0 |
| 21.83.66.14 | 357777934 | 0 |
| 21.83.66.15 | 357777935 | 0 |
| 21.83.66.16 | 357777936 | 0 |
| 21.83.66.17 | 357777937 | 0 |
| 21.83.66.18 | 357777938 | 0 |
| 21.83.66.19 | 357777939 | 0 |
| 21.83.66.20 | 357777940 | 0 |
| 21.83.66.21 | 357777941 | 0 |
| 21.83.66.22 | 357777942 | 0 |
| 21.83.66.23 | 357777943 | 0 |
| 21.83.66.24 | 357777944 | 0 |
| 21.83.66.25 | 357777945 | 0 |
| 21.83.66.26 | 357777946 | 0 |
| 21.83.66.27 | 357777947 | 0 |
| 21.83.66.28 | 357777948 | 0 |
| 21.83.66.29 | 357777949 | 0 |
| 21.83.66.30 | 357777950 | 0 |
| 21.83.66.31 | 357777951 | 0 |
| 21.83.66.32 | 357777952 | 0 |
| 21.83.66.33 | 357777953 | 0 |
| 21.83.66.34 | 357777954 | 0 |
| 21.83.66.35 | 357777955 | 0 |
| 21.83.66.36 | 357777956 | 0 |
| 21.83.66.37 | 357777957 | 0 |
| 21.83.66.38 | 357777958 | 0 |
| 21.83.66.39 | 357777959 | 0 |
| 21.83.66.40 | 357777960 | 0 |
| 21.83.66.41 | 357777961 | 0 |
| 21.83.66.42 | 357777962 | 0 |
| 21.83.66.43 | 357777963 | 0 |
| 21.83.66.44 | 357777964 | 0 |
| 21.83.66.45 | 357777965 | 0 |
| 21.83.66.46 | 357777966 | 0 |
| 21.83.66.47 | 357777967 | 0 |
| 21.83.66.48 | 357777968 | 0 |
| 21.83.66.49 | 357777969 | 0 |
| 21.83.66.50 | 357777970 | 0 |
| 21.83.66.51 | 357777971 | 0 |
| 21.83.66.52 | 357777972 | 0 |
| 21.83.66.53 | 357777973 | 0 |
| 21.83.66.54 | 357777974 | 0 |
| 21.83.66.55 | 357777975 | 0 |
| 21.83.66.56 | 357777976 | 0 |
| 21.83.66.57 | 357777977 | 0 |
| 21.83.66.58 | 357777978 | 0 |
| 21.83.66.59 | 357777979 | 0 |
| 21.83.66.60 | 357777980 | 0 |
| 21.83.66.61 | 357777981 | 0 |
| 21.83.66.62 | 357777982 | 0 |
| 21.83.66.63 | 357777983 | 0 |
| 21.83.66.64 | 357777984 | 0 |
| 21.83.66.65 | 357777985 | 0 |
| 21.83.66.66 | 357777986 | 0 |
| 21.83.66.67 | 357777987 | 0 |
| 21.83.66.68 | 357777988 | 0 |
| 21.83.66.69 | 357777989 | 0 |
| 21.83.66.70 | 357777990 | 0 |
| 21.83.66.71 | 357777991 | 0 |
| 21.83.66.72 | 357777992 | 0 |
| 21.83.66.73 | 357777993 | 0 |
| 21.83.66.74 | 357777994 | 0 |
| 21.83.66.75 | 357777995 | 0 |
| 21.83.66.76 | 357777996 | 0 |
| 21.83.66.77 | 357777997 | 0 |
| 21.83.66.78 | 357777998 | 0 |
| 21.83.66.79 | 357777999 | 0 |
| 21.83.66.80 | 357778000 | 0 |
| 21.83.66.81 | 357778001 | 0 |
| 21.83.66.82 | 357778002 | 0 |
| 21.83.66.83 | 357778003 | 0 |
| 21.83.66.84 | 357778004 | 0 |
| 21.83.66.85 | 357778005 | 0 |