The IP address 18.81.45 is provided by Massachusetts Institute of Technology, it's belong to the CDIR (Classless Inter-Domain Routing) 18.0.0.0/8 (range 18.0.0.0 to 18.255.255.255). The autonomous system number (ASN) is 3.
| ASN | 3 |
| IP starting by | 18.0.0.0 |
| IP ending by | 18.255.255.255 |
| ASN Name | Massachusetts Institute of Technology |
| CDIR | 18.0.0.0/8 |
| Numerical IP | |
| Registry | |
| Last update | 26/07/2017 |

| Country Code | Country | Region | City | Latitude | Longitude | Last update | |
| IP2Location | US | United States | - | Cambridge | 42.3651 | -71.1045 | 2017-07-26 |
| MaxMind | US | United States | - | Cambridge | 42.3646 | -71.1028 | 2017-07-26 |
| Whois | US | - | - | - | -96 | 37 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 18.81.45.0 | 307309824 | 0 |
| 18.81.45.1 | 307309825 | 0 |
| 18.81.45.2 | 307309826 | 0 |
| 18.81.45.3 | 307309827 | 0 |
| 18.81.45.4 | 307309828 | 0 |
| 18.81.45.5 | 307309829 | 0 |
| 18.81.45.6 | 307309830 | 0 |
| 18.81.45.7 | 307309831 | 0 |
| 18.81.45.8 | 307309832 | 0 |
| 18.81.45.9 | 307309833 | 0 |
| 18.81.45.10 | 307309834 | 0 |
| 18.81.45.11 | 307309835 | 0 |
| 18.81.45.12 | 307309836 | 0 |
| 18.81.45.13 | 307309837 | 0 |
| 18.81.45.14 | 307309838 | 0 |
| 18.81.45.15 | 307309839 | 0 |
| 18.81.45.16 | 307309840 | 0 |
| 18.81.45.17 | 307309841 | 0 |
| 18.81.45.18 | 307309842 | 0 |
| 18.81.45.19 | 307309843 | 0 |
| 18.81.45.20 | 307309844 | 0 |
| 18.81.45.21 | 307309845 | 0 |
| 18.81.45.22 | 307309846 | 0 |
| 18.81.45.23 | 307309847 | 0 |
| 18.81.45.24 | 307309848 | 0 |
| 18.81.45.25 | 307309849 | 0 |
| 18.81.45.26 | 307309850 | 0 |
| 18.81.45.27 | 307309851 | 0 |
| 18.81.45.28 | 307309852 | 0 |
| 18.81.45.29 | 307309853 | 0 |
| 18.81.45.30 | 307309854 | 0 |
| 18.81.45.31 | 307309855 | 0 |
| 18.81.45.32 | 307309856 | 0 |
| 18.81.45.33 | 307309857 | 0 |
| 18.81.45.34 | 307309858 | 0 |
| 18.81.45.35 | 307309859 | 0 |
| 18.81.45.36 | 307309860 | 0 |
| 18.81.45.37 | 307309861 | 0 |
| 18.81.45.38 | 307309862 | 0 |
| 18.81.45.39 | 307309863 | 0 |
| 18.81.45.40 | 307309864 | 0 |
| 18.81.45.41 | 307309865 | 0 |
| 18.81.45.42 | 307309866 | 0 |
| 18.81.45.43 | 307309867 | 0 |
| 18.81.45.44 | 307309868 | 0 |
| 18.81.45.45 | 307309869 | 0 |
| 18.81.45.46 | 307309870 | 0 |
| 18.81.45.47 | 307309871 | 0 |
| 18.81.45.48 | 307309872 | 0 |
| 18.81.45.49 | 307309873 | 0 |
| 18.81.45.50 | 307309874 | 0 |
| 18.81.45.51 | 307309875 | 0 |
| 18.81.45.52 | 307309876 | 0 |
| 18.81.45.53 | 307309877 | 0 |
| 18.81.45.54 | 307309878 | 0 |
| 18.81.45.55 | 307309879 | 0 |
| 18.81.45.56 | 307309880 | 0 |
| 18.81.45.57 | 307309881 | 0 |
| 18.81.45.58 | 307309882 | 0 |
| 18.81.45.59 | 307309883 | 0 |
| 18.81.45.60 | 307309884 | 0 |
| 18.81.45.61 | 307309885 | 0 |
| 18.81.45.62 | 307309886 | 0 |
| 18.81.45.63 | 307309887 | 0 |
| 18.81.45.64 | 307309888 | 0 |
| 18.81.45.65 | 307309889 | 0 |
| 18.81.45.66 | 307309890 | 0 |
| 18.81.45.67 | 307309891 | 0 |
| 18.81.45.68 | 307309892 | 0 |
| 18.81.45.69 | 307309893 | 0 |
| 18.81.45.70 | 307309894 | 0 |
| 18.81.45.71 | 307309895 | 0 |
| 18.81.45.72 | 307309896 | 0 |
| 18.81.45.73 | 307309897 | 0 |
| 18.81.45.74 | 307309898 | 0 |
| 18.81.45.75 | 307309899 | 0 |
| 18.81.45.76 | 307309900 | 0 |
| 18.81.45.77 | 307309901 | 0 |
| 18.81.45.78 | 307309902 | 0 |
| 18.81.45.79 | 307309903 | 0 |
| 18.81.45.80 | 307309904 | 0 |
| 18.81.45.81 | 307309905 | 0 |
| 18.81.45.82 | 307309906 | 0 |
| 18.81.45.83 | 307309907 | 0 |
| 18.81.45.84 | 307309908 | 0 |
| 18.81.45.85 | 307309909 | 0 |