Les adresses IP débutant par 21.255.3 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 | 12/02/2018 |

| Code pays | Pays | Région | Ville | Latitude | Longitude | Dernière mise à jour | |
| IP2Location | US | États-Unis | - | Columbus | 39,9664 | -83,0128 | 2018-02-12 |
| MaxMind | US | États-Unis | - | - | 37,751 | -97,822 | 2018-02-12 |
| Whois | US | - | - | - | -96 | 37 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 21.255.3.0 | 369033984 | 0 |
| 21.255.3.1 | 369033985 | 0 |
| 21.255.3.2 | 369033986 | 0 |
| 21.255.3.3 | 369033987 | 0 |
| 21.255.3.4 | 369033988 | 0 |
| 21.255.3.5 | 369033989 | 0 |
| 21.255.3.6 | 369033990 | 0 |
| 21.255.3.7 | 369033991 | 0 |
| 21.255.3.8 | 369033992 | 0 |
| 21.255.3.9 | 369033993 | 0 |
| 21.255.3.10 | 369033994 | 0 |
| 21.255.3.11 | 369033995 | 0 |
| 21.255.3.12 | 369033996 | 0 |
| 21.255.3.13 | 369033997 | 0 |
| 21.255.3.14 | 369033998 | 0 |
| 21.255.3.15 | 369033999 | 0 |
| 21.255.3.16 | 369034000 | 0 |
| 21.255.3.17 | 369034001 | 0 |
| 21.255.3.18 | 369034002 | 0 |
| 21.255.3.19 | 369034003 | 0 |
| 21.255.3.20 | 369034004 | 0 |
| 21.255.3.21 | 369034005 | 0 |
| 21.255.3.22 | 369034006 | 0 |
| 21.255.3.23 | 369034007 | 0 |
| 21.255.3.24 | 369034008 | 0 |
| 21.255.3.25 | 369034009 | 0 |
| 21.255.3.26 | 369034010 | 0 |
| 21.255.3.27 | 369034011 | 0 |
| 21.255.3.28 | 369034012 | 0 |
| 21.255.3.29 | 369034013 | 0 |
| 21.255.3.30 | 369034014 | 0 |
| 21.255.3.31 | 369034015 | 0 |
| 21.255.3.32 | 369034016 | 0 |
| 21.255.3.33 | 369034017 | 0 |
| 21.255.3.34 | 369034018 | 0 |
| 21.255.3.35 | 369034019 | 0 |
| 21.255.3.36 | 369034020 | 0 |
| 21.255.3.37 | 369034021 | 0 |
| 21.255.3.38 | 369034022 | 0 |
| 21.255.3.39 | 369034023 | 0 |
| 21.255.3.40 | 369034024 | 0 |
| 21.255.3.41 | 369034025 | 0 |
| 21.255.3.42 | 369034026 | 0 |
| 21.255.3.43 | 369034027 | 0 |
| 21.255.3.44 | 369034028 | 0 |
| 21.255.3.45 | 369034029 | 0 |
| 21.255.3.46 | 369034030 | 0 |
| 21.255.3.47 | 369034031 | 0 |
| 21.255.3.48 | 369034032 | 0 |
| 21.255.3.49 | 369034033 | 0 |
| 21.255.3.50 | 369034034 | 0 |
| 21.255.3.51 | 369034035 | 0 |
| 21.255.3.52 | 369034036 | 0 |
| 21.255.3.53 | 369034037 | 0 |
| 21.255.3.54 | 369034038 | 0 |
| 21.255.3.55 | 369034039 | 0 |
| 21.255.3.56 | 369034040 | 0 |
| 21.255.3.57 | 369034041 | 0 |
| 21.255.3.58 | 369034042 | 0 |
| 21.255.3.59 | 369034043 | 0 |
| 21.255.3.60 | 369034044 | 0 |
| 21.255.3.61 | 369034045 | 0 |
| 21.255.3.62 | 369034046 | 0 |
| 21.255.3.63 | 369034047 | 0 |
| 21.255.3.64 | 369034048 | 0 |
| 21.255.3.65 | 369034049 | 0 |
| 21.255.3.66 | 369034050 | 0 |
| 21.255.3.67 | 369034051 | 0 |
| 21.255.3.68 | 369034052 | 0 |
| 21.255.3.69 | 369034053 | 0 |
| 21.255.3.70 | 369034054 | 0 |
| 21.255.3.71 | 369034055 | 0 |
| 21.255.3.72 | 369034056 | 0 |
| 21.255.3.73 | 369034057 | 0 |
| 21.255.3.74 | 369034058 | 0 |
| 21.255.3.75 | 369034059 | 0 |
| 21.255.3.76 | 369034060 | 0 |
| 21.255.3.77 | 369034061 | 0 |
| 21.255.3.78 | 369034062 | 0 |
| 21.255.3.79 | 369034063 | 0 |
| 21.255.3.80 | 369034064 | 0 |
| 21.255.3.81 | 369034065 | 0 |
| 21.255.3.82 | 369034066 | 0 |
| 21.255.3.83 | 369034067 | 0 |
| 21.255.3.84 | 369034068 | 0 |
| 21.255.3.85 | 369034069 | 0 |