The IP address 145.21.17 is provided by SURFnet, it's belong to the CDIR (Classless Inter-Domain Routing) 145.23.0.0/16 (range 145.23.0.0 to 145.23.255.255). The autonomous system number (ASN) is 1103.
| ASN | 1103 |
| IP starting by | 145.23.0.0 |
| IP ending by | 145.23.255.255 |
| ASN Name | SURFnet |
| CDIR | 145.23.0.0/16 |
| Numerical IP | |
| Registry | |
| Last update | 02/01/2019 |

| Country Code | Country | Region | City | Latitude | Longitude | Last update | |
| IP2Location | NL | Netherlands | - | Dordrecht | 51.81 | 4.6736 | 2019-01-01 |
| MaxMind | NL | Netherlands | - | Dordrecht | 51.8007 | 4.6982 | 2019-01-01 |
| Whois | NL | - | - | - | 5 | 52 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 145.21.17.0 | 2434076928 | 0 |
| 145.21.17.1 | 2434076929 | 0 |
| 145.21.17.2 | 2434076930 | 0 |
| 145.21.17.3 | 2434076931 | 0 |
| 145.21.17.4 | 2434076932 | 0 |
| 145.21.17.5 | 2434076933 | 0 |
| 145.21.17.6 | 2434076934 | 0 |
| 145.21.17.7 | 2434076935 | 0 |
| 145.21.17.8 | 2434076936 | 0 |
| 145.21.17.9 | 2434076937 | 0 |
| 145.21.17.10 | 2434076938 | 0 |
| 145.21.17.11 | 2434076939 | 0 |
| 145.21.17.12 | 2434076940 | 0 |
| 145.21.17.13 | 2434076941 | 0 |
| 145.21.17.14 | 2434076942 | 0 |
| 145.21.17.15 | 2434076943 | 0 |
| 145.21.17.16 | 2434076944 | 0 |
| 145.21.17.17 | 2434076945 | 0 |
| 145.21.17.18 | 2434076946 | 0 |
| 145.21.17.19 | 2434076947 | 0 |
| 145.21.17.20 | 2434076948 | 0 |
| 145.21.17.21 | 2434076949 | 0 |
| 145.21.17.22 | 2434076950 | 0 |
| 145.21.17.23 | 2434076951 | 0 |
| 145.21.17.24 | 2434076952 | 0 |
| 145.21.17.25 | 2434076953 | 0 |
| 145.21.17.26 | 2434076954 | 0 |
| 145.21.17.27 | 2434076955 | 0 |
| 145.21.17.28 | 2434076956 | 0 |
| 145.21.17.29 | 2434076957 | 0 |
| 145.21.17.30 | 2434076958 | 0 |
| 145.21.17.31 | 2434076959 | 0 |
| 145.21.17.32 | 2434076960 | 0 |
| 145.21.17.33 | 2434076961 | 0 |
| 145.21.17.34 | 2434076962 | 0 |
| 145.21.17.35 | 2434076963 | 0 |
| 145.21.17.36 | 2434076964 | 0 |
| 145.21.17.37 | 2434076965 | 0 |
| 145.21.17.38 | 2434076966 | 0 |
| 145.21.17.39 | 2434076967 | 0 |
| 145.21.17.40 | 2434076968 | 0 |
| 145.21.17.41 | 2434076969 | 0 |
| 145.21.17.42 | 2434076970 | 0 |
| 145.21.17.43 | 2434076971 | 0 |
| 145.21.17.44 | 2434076972 | 0 |
| 145.21.17.45 | 2434076973 | 0 |
| 145.21.17.46 | 2434076974 | 0 |
| 145.21.17.47 | 2434076975 | 0 |
| 145.21.17.48 | 2434076976 | 0 |
| 145.21.17.49 | 2434076977 | 0 |
| 145.21.17.50 | 2434076978 | 0 |
| 145.21.17.51 | 2434076979 | 0 |
| 145.21.17.52 | 2434076980 | 0 |
| 145.21.17.53 | 2434076981 | 0 |
| 145.21.17.54 | 2434076982 | 0 |
| 145.21.17.55 | 2434076983 | 0 |
| 145.21.17.56 | 2434076984 | 0 |
| 145.21.17.57 | 2434076985 | 0 |
| 145.21.17.58 | 2434076986 | 0 |
| 145.21.17.59 | 2434076987 | 0 |
| 145.21.17.60 | 2434076988 | 0 |
| 145.21.17.61 | 2434076989 | 0 |
| 145.21.17.62 | 2434076990 | 0 |
| 145.21.17.63 | 2434076991 | 0 |
| 145.21.17.64 | 2434076992 | 0 |
| 145.21.17.65 | 2434076993 | 0 |
| 145.21.17.66 | 2434076994 | 0 |
| 145.21.17.67 | 2434076995 | 0 |
| 145.21.17.68 | 2434076996 | 0 |
| 145.21.17.69 | 2434076997 | 0 |
| 145.21.17.70 | 2434076998 | 0 |
| 145.21.17.71 | 2434076999 | 0 |
| 145.21.17.72 | 2434077000 | 0 |
| 145.21.17.73 | 2434077001 | 0 |
| 145.21.17.74 | 2434077002 | 0 |
| 145.21.17.75 | 2434077003 | 0 |
| 145.21.17.76 | 2434077004 | 0 |
| 145.21.17.77 | 2434077005 | 0 |
| 145.21.17.78 | 2434077006 | 0 |
| 145.21.17.79 | 2434077007 | 0 |
| 145.21.17.80 | 2434077008 | 0 |
| 145.21.17.81 | 2434077009 | 0 |
| 145.21.17.82 | 2434077010 | 0 |
| 145.21.17.83 | 2434077011 | 0 |
| 145.21.17.84 | 2434077012 | 0 |
| 145.21.17.85 | 2434077013 | 0 |