Les adresses IP débutant par 21.76.42 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 | 23/10/2017 |

| Code pays | Pays | Région | Ville | Latitude | Longitude | Dernière mise à jour | |
| IP2Location | US | États-Unis | - | Columbus | 39,9664 | -83,0128 | 2017-10-23 |
| MaxMind | US | États-Unis | - | - | 37,751 | -97,822 | 2017-10-23 |
| Whois | US | - | - | - | -96 | 37 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 21.76.42.0 | 357313024 | 0 |
| 21.76.42.1 | 357313025 | 0 |
| 21.76.42.2 | 357313026 | 0 |
| 21.76.42.3 | 357313027 | 0 |
| 21.76.42.4 | 357313028 | 0 |
| 21.76.42.5 | 357313029 | 0 |
| 21.76.42.6 | 357313030 | 0 |
| 21.76.42.7 | 357313031 | 0 |
| 21.76.42.8 | 357313032 | 0 |
| 21.76.42.9 | 357313033 | 0 |
| 21.76.42.10 | 357313034 | 0 |
| 21.76.42.11 | 357313035 | 0 |
| 21.76.42.12 | 357313036 | 0 |
| 21.76.42.13 | 357313037 | 0 |
| 21.76.42.14 | 357313038 | 0 |
| 21.76.42.15 | 357313039 | 0 |
| 21.76.42.16 | 357313040 | 0 |
| 21.76.42.17 | 357313041 | 0 |
| 21.76.42.18 | 357313042 | 0 |
| 21.76.42.19 | 357313043 | 0 |
| 21.76.42.20 | 357313044 | 0 |
| 21.76.42.21 | 357313045 | 0 |
| 21.76.42.22 | 357313046 | 0 |
| 21.76.42.23 | 357313047 | 0 |
| 21.76.42.24 | 357313048 | 0 |
| 21.76.42.25 | 357313049 | 0 |
| 21.76.42.26 | 357313050 | 0 |
| 21.76.42.27 | 357313051 | 0 |
| 21.76.42.28 | 357313052 | 0 |
| 21.76.42.29 | 357313053 | 0 |
| 21.76.42.30 | 357313054 | 0 |
| 21.76.42.31 | 357313055 | 0 |
| 21.76.42.32 | 357313056 | 0 |
| 21.76.42.33 | 357313057 | 0 |
| 21.76.42.34 | 357313058 | 0 |
| 21.76.42.35 | 357313059 | 0 |
| 21.76.42.36 | 357313060 | 0 |
| 21.76.42.37 | 357313061 | 0 |
| 21.76.42.38 | 357313062 | 0 |
| 21.76.42.39 | 357313063 | 0 |
| 21.76.42.40 | 357313064 | 0 |
| 21.76.42.41 | 357313065 | 0 |
| 21.76.42.42 | 357313066 | 0 |
| 21.76.42.43 | 357313067 | 0 |
| 21.76.42.44 | 357313068 | 0 |
| 21.76.42.45 | 357313069 | 0 |
| 21.76.42.46 | 357313070 | 0 |
| 21.76.42.47 | 357313071 | 0 |
| 21.76.42.48 | 357313072 | 0 |
| 21.76.42.49 | 357313073 | 0 |
| 21.76.42.50 | 357313074 | 0 |
| 21.76.42.51 | 357313075 | 0 |
| 21.76.42.52 | 357313076 | 0 |
| 21.76.42.53 | 357313077 | 0 |
| 21.76.42.54 | 357313078 | 0 |
| 21.76.42.55 | 357313079 | 0 |
| 21.76.42.56 | 357313080 | 0 |
| 21.76.42.57 | 357313081 | 0 |
| 21.76.42.58 | 357313082 | 0 |
| 21.76.42.59 | 357313083 | 0 |
| 21.76.42.60 | 357313084 | 0 |
| 21.76.42.61 | 357313085 | 0 |
| 21.76.42.62 | 357313086 | 0 |
| 21.76.42.63 | 357313087 | 0 |
| 21.76.42.64 | 357313088 | 0 |
| 21.76.42.65 | 357313089 | 0 |
| 21.76.42.66 | 357313090 | 0 |
| 21.76.42.67 | 357313091 | 0 |
| 21.76.42.68 | 357313092 | 0 |
| 21.76.42.69 | 357313093 | 0 |
| 21.76.42.70 | 357313094 | 0 |
| 21.76.42.71 | 357313095 | 0 |
| 21.76.42.72 | 357313096 | 0 |
| 21.76.42.73 | 357313097 | 0 |
| 21.76.42.74 | 357313098 | 0 |
| 21.76.42.75 | 357313099 | 0 |
| 21.76.42.76 | 357313100 | 0 |
| 21.76.42.77 | 357313101 | 0 |
| 21.76.42.78 | 357313102 | 0 |
| 21.76.42.79 | 357313103 | 0 |
| 21.76.42.80 | 357313104 | 0 |
| 21.76.42.81 | 357313105 | 0 |
| 21.76.42.82 | 357313106 | 0 |
| 21.76.42.83 | 357313107 | 0 |
| 21.76.42.84 | 357313108 | 0 |
| 21.76.42.85 | 357313109 | 0 |