La dirección IP 21.81.74 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 | 15/09/2017 |

| Código País | País | Región | Ciudad | Latitud | Longitud | Última actualización | |
| IP2Location | US | Estados Unidos | - | Columbus | 39,9664 | -83,0128 | 2017-09-14 |
| MaxMind | US | Estados Unidos | - | - | 37,751 | -97,822 | 2017-09-14 |
| Whois | US | - | - | - | -96 | 37 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 21.81.74.0 | 357648896 | 0 |
| 21.81.74.1 | 357648897 | 0 |
| 21.81.74.2 | 357648898 | 0 |
| 21.81.74.3 | 357648899 | 0 |
| 21.81.74.4 | 357648900 | 0 |
| 21.81.74.5 | 357648901 | 0 |
| 21.81.74.6 | 357648902 | 0 |
| 21.81.74.7 | 357648903 | 0 |
| 21.81.74.8 | 357648904 | 0 |
| 21.81.74.9 | 357648905 | 0 |
| 21.81.74.10 | 357648906 | 0 |
| 21.81.74.11 | 357648907 | 0 |
| 21.81.74.12 | 357648908 | 0 |
| 21.81.74.13 | 357648909 | 0 |
| 21.81.74.14 | 357648910 | 0 |
| 21.81.74.15 | 357648911 | 0 |
| 21.81.74.16 | 357648912 | 0 |
| 21.81.74.17 | 357648913 | 0 |
| 21.81.74.18 | 357648914 | 0 |
| 21.81.74.19 | 357648915 | 0 |
| 21.81.74.20 | 357648916 | 0 |
| 21.81.74.21 | 357648917 | 0 |
| 21.81.74.22 | 357648918 | 0 |
| 21.81.74.23 | 357648919 | 0 |
| 21.81.74.24 | 357648920 | 0 |
| 21.81.74.25 | 357648921 | 0 |
| 21.81.74.26 | 357648922 | 0 |
| 21.81.74.27 | 357648923 | 0 |
| 21.81.74.28 | 357648924 | 0 |
| 21.81.74.29 | 357648925 | 0 |
| 21.81.74.30 | 357648926 | 0 |
| 21.81.74.31 | 357648927 | 0 |
| 21.81.74.32 | 357648928 | 0 |
| 21.81.74.33 | 357648929 | 0 |
| 21.81.74.34 | 357648930 | 0 |
| 21.81.74.35 | 357648931 | 0 |
| 21.81.74.36 | 357648932 | 0 |
| 21.81.74.37 | 357648933 | 0 |
| 21.81.74.38 | 357648934 | 0 |
| 21.81.74.39 | 357648935 | 0 |
| 21.81.74.40 | 357648936 | 0 |
| 21.81.74.41 | 357648937 | 0 |
| 21.81.74.42 | 357648938 | 0 |
| 21.81.74.43 | 357648939 | 0 |
| 21.81.74.44 | 357648940 | 0 |
| 21.81.74.45 | 357648941 | 0 |
| 21.81.74.46 | 357648942 | 0 |
| 21.81.74.47 | 357648943 | 0 |
| 21.81.74.48 | 357648944 | 0 |
| 21.81.74.49 | 357648945 | 0 |
| 21.81.74.50 | 357648946 | 0 |
| 21.81.74.51 | 357648947 | 0 |
| 21.81.74.52 | 357648948 | 0 |
| 21.81.74.53 | 357648949 | 0 |
| 21.81.74.54 | 357648950 | 0 |
| 21.81.74.55 | 357648951 | 0 |
| 21.81.74.56 | 357648952 | 0 |
| 21.81.74.57 | 357648953 | 0 |
| 21.81.74.58 | 357648954 | 0 |
| 21.81.74.59 | 357648955 | 0 |
| 21.81.74.60 | 357648956 | 0 |
| 21.81.74.61 | 357648957 | 0 |
| 21.81.74.62 | 357648958 | 0 |
| 21.81.74.63 | 357648959 | 0 |
| 21.81.74.64 | 357648960 | 0 |
| 21.81.74.65 | 357648961 | 0 |
| 21.81.74.66 | 357648962 | 0 |
| 21.81.74.67 | 357648963 | 0 |
| 21.81.74.68 | 357648964 | 0 |
| 21.81.74.69 | 357648965 | 0 |
| 21.81.74.70 | 357648966 | 0 |
| 21.81.74.71 | 357648967 | 0 |
| 21.81.74.72 | 357648968 | 0 |
| 21.81.74.73 | 357648969 | 0 |
| 21.81.74.74 | 357648970 | 0 |
| 21.81.74.75 | 357648971 | 0 |
| 21.81.74.76 | 357648972 | 0 |
| 21.81.74.77 | 357648973 | 0 |
| 21.81.74.78 | 357648974 | 0 |
| 21.81.74.79 | 357648975 | 0 |
| 21.81.74.80 | 357648976 | 0 |
| 21.81.74.81 | 357648977 | 0 |
| 21.81.74.82 | 357648978 | 0 |
| 21.81.74.83 | 357648979 | 0 |
| 21.81.74.84 | 357648980 | 0 |
| 21.81.74.85 | 357648981 | 0 |