Les adresses IP débutant par 145.9.172 sont fournies par SURFnet, elles appartiennent au CIDR (Classless Inter-Domain Routing) 145.9.0.0/16, le bloc IP comprant les adresses de 145.9.0.0 à 145.9.255.255). Le numéro de système autonome (ASN) est 1103.
| ASN | 1103 |
| IP commençant par | 145.9.0.0 |
| IP se terminant par | 145.9.255.255 |
| Nom ASN | SURFnet |
| CDIR | 145.9.0.0/16 |
| IP numérique | |
| Registe | ripencc |
| Dernière mise à jour | 07/08/2020 |

| Code pays | Pays | Région | Ville | Latitude | Longitude | Dernière mise à jour | |
| IP2Location | NL | Pays-Bas | - | Utrecht | 52,0908 | 5,1222 | 2020-08-07 |
| MaxMind | NL | Pays-Bas | - | Utrecht | 52,0938 | 5,1191 | 2020-08-07 |
| Whois | NL | - | - | - | 5 | 52 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 145.9.172.0 | 2433330176 | 0 |
| 145.9.172.1 | 2433330177 | 0 |
| 145.9.172.2 | 2433330178 | 0 |
| 145.9.172.3 | 2433330179 | 0 |
| 145.9.172.4 | 2433330180 | 0 |
| 145.9.172.5 | 2433330181 | 0 |
| 145.9.172.6 | 2433330182 | 0 |
| 145.9.172.7 | 2433330183 | 0 |
| 145.9.172.8 | 2433330184 | 0 |
| 145.9.172.9 | 2433330185 | 0 |
| 145.9.172.10 | 2433330186 | 0 |
| 145.9.172.11 | 2433330187 | 0 |
| 145.9.172.12 | 2433330188 | 0 |
| 145.9.172.13 | 2433330189 | 0 |
| 145.9.172.14 | 2433330190 | 0 |
| 145.9.172.15 | 2433330191 | 0 |
| 145.9.172.16 | 2433330192 | 0 |
| 145.9.172.17 | 2433330193 | 0 |
| 145.9.172.18 | 2433330194 | 0 |
| 145.9.172.19 | 2433330195 | 0 |
| 145.9.172.20 | 2433330196 | 0 |
| 145.9.172.21 | 2433330197 | 0 |
| 145.9.172.22 | 2433330198 | 0 |
| 145.9.172.23 | 2433330199 | 0 |
| 145.9.172.24 | 2433330200 | 0 |
| 145.9.172.25 | 2433330201 | 0 |
| 145.9.172.26 | 2433330202 | 0 |
| 145.9.172.27 | 2433330203 | 0 |
| 145.9.172.28 | 2433330204 | 0 |
| 145.9.172.29 | 2433330205 | 0 |
| 145.9.172.30 | 2433330206 | 0 |
| 145.9.172.31 | 2433330207 | 0 |
| 145.9.172.32 | 2433330208 | 0 |
| 145.9.172.33 | 2433330209 | 0 |
| 145.9.172.34 | 2433330210 | 0 |
| 145.9.172.35 | 2433330211 | 0 |
| 145.9.172.36 | 2433330212 | 0 |
| 145.9.172.37 | 2433330213 | 0 |
| 145.9.172.38 | 2433330214 | 0 |
| 145.9.172.39 | 2433330215 | 0 |
| 145.9.172.40 | 2433330216 | 0 |
| 145.9.172.41 | 2433330217 | 0 |
| 145.9.172.42 | 2433330218 | 0 |
| 145.9.172.43 | 2433330219 | 0 |
| 145.9.172.44 | 2433330220 | 0 |
| 145.9.172.45 | 2433330221 | 0 |
| 145.9.172.46 | 2433330222 | 0 |
| 145.9.172.47 | 2433330223 | 0 |
| 145.9.172.48 | 2433330224 | 0 |
| 145.9.172.49 | 2433330225 | 0 |
| 145.9.172.50 | 2433330226 | 0 |
| 145.9.172.51 | 2433330227 | 0 |
| 145.9.172.52 | 2433330228 | 0 |
| 145.9.172.53 | 2433330229 | 0 |
| 145.9.172.54 | 2433330230 | 0 |
| 145.9.172.55 | 2433330231 | 0 |
| 145.9.172.56 | 2433330232 | 0 |
| 145.9.172.57 | 2433330233 | 0 |
| 145.9.172.58 | 2433330234 | 0 |
| 145.9.172.59 | 2433330235 | 0 |
| 145.9.172.60 | 2433330236 | 0 |
| 145.9.172.61 | 2433330237 | 0 |
| 145.9.172.62 | 2433330238 | 0 |
| 145.9.172.63 | 2433330239 | 0 |
| 145.9.172.64 | 2433330240 | 0 |
| 145.9.172.65 | 2433330241 | 0 |
| 145.9.172.66 | 2433330242 | 0 |
| 145.9.172.67 | 2433330243 | 0 |
| 145.9.172.68 | 2433330244 | 0 |
| 145.9.172.69 | 2433330245 | 0 |
| 145.9.172.70 | 2433330246 | 0 |
| 145.9.172.71 | 2433330247 | 0 |
| 145.9.172.72 | 2433330248 | 0 |
| 145.9.172.73 | 2433330249 | 0 |
| 145.9.172.74 | 2433330250 | 0 |
| 145.9.172.75 | 2433330251 | 0 |
| 145.9.172.76 | 2433330252 | 0 |
| 145.9.172.77 | 2433330253 | 0 |
| 145.9.172.78 | 2433330254 | 0 |
| 145.9.172.79 | 2433330255 | 0 |
| 145.9.172.80 | 2433330256 | 0 |
| 145.9.172.81 | 2433330257 | 0 |
| 145.9.172.82 | 2433330258 | 0 |
| 145.9.172.83 | 2433330259 | 0 |
| 145.9.172.84 | 2433330260 | 0 |
| 145.9.172.85 | 2433330261 | 0 |