La dirección IP 21.88.91 es proporcionada por China Education and Research Network Center, que es propiedad de la CIDR (Classless Inter-Domain Routing) 22.30.204.0/23, IP entre 22.30.204.0 a 22.30.205.255 ). El número de sistema autónomo (ASN) es 4538.
| ASN | 4538 |
| IP que comienzan con | 22.30.204.0 |
| IP que termina con | 22.30.205.255 |
| ASN Nombre | China Education and Research Network Center |
| CDIR | 22.30.204.0/23 |
| IP numérica | |
| Registe | |
| Última actualización | 16/10/2017 |

| Código País | País | Región | Ciudad | Latitud | Longitud | Última actualización | |
| IP2Location | US | Estados Unidos | - | Columbus | 39,9664 | -83,0128 | 2017-10-15 |
| MaxMind | US | Estados Unidos | - | - | 37,751 | -97,822 | 2017-10-15 |
| Whois | US | - | - | - | -96 | 37 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 21.88.91.0 | 358112000 | 0 |
| 21.88.91.1 | 358112001 | 0 |
| 21.88.91.2 | 358112002 | 0 |
| 21.88.91.3 | 358112003 | 0 |
| 21.88.91.4 | 358112004 | 0 |
| 21.88.91.5 | 358112005 | 0 |
| 21.88.91.6 | 358112006 | 0 |
| 21.88.91.7 | 358112007 | 0 |
| 21.88.91.8 | 358112008 | 0 |
| 21.88.91.9 | 358112009 | 0 |
| 21.88.91.10 | 358112010 | 0 |
| 21.88.91.11 | 358112011 | 0 |
| 21.88.91.12 | 358112012 | 0 |
| 21.88.91.13 | 358112013 | 0 |
| 21.88.91.14 | 358112014 | 0 |
| 21.88.91.15 | 358112015 | 0 |
| 21.88.91.16 | 358112016 | 0 |
| 21.88.91.17 | 358112017 | 0 |
| 21.88.91.18 | 358112018 | 0 |
| 21.88.91.19 | 358112019 | 0 |
| 21.88.91.20 | 358112020 | 0 |
| 21.88.91.21 | 358112021 | 0 |
| 21.88.91.22 | 358112022 | 0 |
| 21.88.91.23 | 358112023 | 0 |
| 21.88.91.24 | 358112024 | 0 |
| 21.88.91.25 | 358112025 | 0 |
| 21.88.91.26 | 358112026 | 0 |
| 21.88.91.27 | 358112027 | 0 |
| 21.88.91.28 | 358112028 | 0 |
| 21.88.91.29 | 358112029 | 0 |
| 21.88.91.30 | 358112030 | 0 |
| 21.88.91.31 | 358112031 | 0 |
| 21.88.91.32 | 358112032 | 0 |
| 21.88.91.33 | 358112033 | 0 |
| 21.88.91.34 | 358112034 | 0 |
| 21.88.91.35 | 358112035 | 0 |
| 21.88.91.36 | 358112036 | 0 |
| 21.88.91.37 | 358112037 | 0 |
| 21.88.91.38 | 358112038 | 0 |
| 21.88.91.39 | 358112039 | 0 |
| 21.88.91.40 | 358112040 | 0 |
| 21.88.91.41 | 358112041 | 0 |
| 21.88.91.42 | 358112042 | 0 |
| 21.88.91.43 | 358112043 | 0 |
| 21.88.91.44 | 358112044 | 0 |
| 21.88.91.45 | 358112045 | 0 |
| 21.88.91.46 | 358112046 | 0 |
| 21.88.91.47 | 358112047 | 0 |
| 21.88.91.48 | 358112048 | 0 |
| 21.88.91.49 | 358112049 | 0 |
| 21.88.91.50 | 358112050 | 0 |
| 21.88.91.51 | 358112051 | 0 |
| 21.88.91.52 | 358112052 | 0 |
| 21.88.91.53 | 358112053 | 0 |
| 21.88.91.54 | 358112054 | 0 |
| 21.88.91.55 | 358112055 | 0 |
| 21.88.91.56 | 358112056 | 0 |
| 21.88.91.57 | 358112057 | 0 |
| 21.88.91.58 | 358112058 | 0 |
| 21.88.91.59 | 358112059 | 0 |
| 21.88.91.60 | 358112060 | 0 |
| 21.88.91.61 | 358112061 | 0 |
| 21.88.91.62 | 358112062 | 0 |
| 21.88.91.63 | 358112063 | 0 |
| 21.88.91.64 | 358112064 | 0 |
| 21.88.91.65 | 358112065 | 0 |
| 21.88.91.66 | 358112066 | 0 |
| 21.88.91.67 | 358112067 | 0 |
| 21.88.91.68 | 358112068 | 0 |
| 21.88.91.69 | 358112069 | 0 |
| 21.88.91.70 | 358112070 | 0 |
| 21.88.91.71 | 358112071 | 0 |
| 21.88.91.72 | 358112072 | 0 |
| 21.88.91.73 | 358112073 | 0 |
| 21.88.91.74 | 358112074 | 0 |
| 21.88.91.75 | 358112075 | 0 |
| 21.88.91.76 | 358112076 | 0 |
| 21.88.91.77 | 358112077 | 0 |
| 21.88.91.78 | 358112078 | 0 |
| 21.88.91.79 | 358112079 | 0 |
| 21.88.91.80 | 358112080 | 0 |
| 21.88.91.81 | 358112081 | 0 |
| 21.88.91.82 | 358112082 | 0 |
| 21.88.91.83 | 358112083 | 0 |
| 21.88.91.84 | 358112084 | 0 |
| 21.88.91.85 | 358112085 | 0 |