Les adresses IP débutant par 81.131.72 sont fournies par BTnet UK Regional network, elles appartiennent au CIDR (Classless Inter-Domain Routing) 81.128.0.0/11, le bloc IP comprant les adresses de 81.128.0.0 à 81.159.255.255). Le numéro de système autonome (ASN) est 2856.
| ASN | 2856 |
| IP commençant par | 81.128.0.0 |
| IP se terminant par | 81.159.255.255 |
| Nom ASN | BTnet UK Regional network |
| CDIR | 81.128.0.0/11 |
| IP numérique | |
| Registe | ripencc |
| Dernière mise à jour | 26/07/2017 |

| Code pays | Pays | Région | Ville | Latitude | Longitude | Dernière mise à jour | |
| IP2Location | GB | Royaume-Uni | - | Colfin | 54,8559 | -5,0284 | 2017-07-26 |
| MaxMind | GB | Royaume-Uni | - | Perth | 56,3274 | -3,352 | 2017-07-26 |
| Whois | GB | - | - | - | -3 | 55 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 81.131.72.0 | 1367558144 | 0 |
| 81.131.72.1 | 1367558145 | 0 |
| 81.131.72.2 | 1367558146 | 0 |
| 81.131.72.3 | 1367558147 | 0 |
| 81.131.72.4 | 1367558148 | 0 |
| 81.131.72.5 | 1367558149 | 0 |
| 81.131.72.6 | 1367558150 | 0 |
| 81.131.72.7 | 1367558151 | 0 |
| 81.131.72.8 | 1367558152 | 0 |
| 81.131.72.9 | 1367558153 | 0 |
| 81.131.72.10 | 1367558154 | 0 |
| 81.131.72.11 | 1367558155 | 0 |
| 81.131.72.12 | 1367558156 | 0 |
| 81.131.72.13 | 1367558157 | 0 |
| 81.131.72.14 | 1367558158 | 0 |
| 81.131.72.15 | 1367558159 | 0 |
| 81.131.72.16 | 1367558160 | 0 |
| 81.131.72.17 | 1367558161 | 0 |
| 81.131.72.18 | 1367558162 | 0 |
| 81.131.72.19 | 1367558163 | 0 |
| 81.131.72.20 | 1367558164 | 0 |
| 81.131.72.21 | 1367558165 | 0 |
| 81.131.72.22 | 1367558166 | 0 |
| 81.131.72.23 | 1367558167 | 0 |
| 81.131.72.24 | 1367558168 | 0 |
| 81.131.72.25 | 1367558169 | 0 |
| 81.131.72.26 | 1367558170 | 0 |
| 81.131.72.27 | 1367558171 | 0 |
| 81.131.72.28 | 1367558172 | 0 |
| 81.131.72.29 | 1367558173 | 0 |
| 81.131.72.30 | 1367558174 | 0 |
| 81.131.72.31 | 1367558175 | 0 |
| 81.131.72.32 | 1367558176 | 0 |
| 81.131.72.33 | 1367558177 | 0 |
| 81.131.72.34 | 1367558178 | 0 |
| 81.131.72.35 | 1367558179 | 0 |
| 81.131.72.36 | 1367558180 | 0 |
| 81.131.72.37 | 1367558181 | 0 |
| 81.131.72.38 | 1367558182 | 0 |
| 81.131.72.39 | 1367558183 | 0 |
| 81.131.72.40 | 1367558184 | 0 |
| 81.131.72.41 | 1367558185 | 0 |
| 81.131.72.42 | 1367558186 | 0 |
| 81.131.72.43 | 1367558187 | 0 |
| 81.131.72.44 | 1367558188 | 0 |
| 81.131.72.45 | 1367558189 | 0 |
| 81.131.72.46 | 1367558190 | 0 |
| 81.131.72.47 | 1367558191 | 0 |
| 81.131.72.48 | 1367558192 | 0 |
| 81.131.72.49 | 1367558193 | 0 |
| 81.131.72.50 | 1367558194 | 0 |
| 81.131.72.51 | 1367558195 | 0 |
| 81.131.72.52 | 1367558196 | 0 |
| 81.131.72.53 | 1367558197 | 0 |
| 81.131.72.54 | 1367558198 | 0 |
| 81.131.72.55 | 1367558199 | 0 |
| 81.131.72.56 | 1367558200 | 0 |
| 81.131.72.57 | 1367558201 | 0 |
| 81.131.72.58 | 1367558202 | 0 |
| 81.131.72.59 | 1367558203 | 0 |
| 81.131.72.60 | 1367558204 | 0 |
| 81.131.72.61 | 1367558205 | 0 |
| 81.131.72.62 | 1367558206 | 0 |
| 81.131.72.63 | 1367558207 | 0 |
| 81.131.72.64 | 1367558208 | 0 |
| 81.131.72.65 | 1367558209 | 0 |
| 81.131.72.66 | 1367558210 | 0 |
| 81.131.72.67 | 1367558211 | 0 |
| 81.131.72.68 | 1367558212 | 0 |
| 81.131.72.69 | 1367558213 | 0 |
| 81.131.72.70 | 1367558214 | 0 |
| 81.131.72.71 | 1367558215 | 0 |
| 81.131.72.72 | 1367558216 | 0 |
| 81.131.72.73 | 1367558217 | 0 |
| 81.131.72.74 | 1367558218 | 0 |
| 81.131.72.75 | 1367558219 | 0 |
| 81.131.72.76 | 1367558220 | 0 |
| 81.131.72.77 | 1367558221 | 0 |
| 81.131.72.78 | 1367558222 | 0 |
| 81.131.72.79 | 1367558223 | 0 |
| 81.131.72.80 | 1367558224 | 0 |
| 81.131.72.81 | 1367558225 | 0 |
| 81.131.72.82 | 1367558226 | 0 |
| 81.131.72.83 | 1367558227 | 0 |
| 81.131.72.84 | 1367558228 | 0 |
| 81.131.72.85 | 1367558229 | 0 |