Les adresses IP débutant par 81.133.80 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 | 12/09/2017 |

| Code pays | Pays | Région | Ville | Latitude | Longitude | Dernière mise à jour | |
| IP2Location | GB | Royaume-Uni | - | London | 51,5085 | -0,1257 | 2017-09-11 |
| MaxMind | GB | Royaume-Uni | - | Leighton Buzzard | 51,9167 | -0,65 | 2017-09-11 |
| Whois | GB | - | - | - | -3 | 55 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 81.133.80.0 | 1367691264 | 0 |
| 81.133.80.1 | 1367691265 | 0 |
| 81.133.80.2 | 1367691266 | 0 |
| 81.133.80.3 | 1367691267 | 0 |
| 81.133.80.4 | 1367691268 | 0 |
| 81.133.80.5 | 1367691269 | 0 |
| 81.133.80.6 | 1367691270 | 0 |
| 81.133.80.7 | 1367691271 | 0 |
| 81.133.80.8 | 1367691272 | 0 |
| 81.133.80.9 | 1367691273 | 0 |
| 81.133.80.10 | 1367691274 | 0 |
| 81.133.80.11 | 1367691275 | 0 |
| 81.133.80.12 | 1367691276 | 0 |
| 81.133.80.13 | 1367691277 | 0 |
| 81.133.80.14 | 1367691278 | 0 |
| 81.133.80.15 | 1367691279 | 0 |
| 81.133.80.16 | 1367691280 | 0 |
| 81.133.80.17 | 1367691281 | 0 |
| 81.133.80.18 | 1367691282 | 0 |
| 81.133.80.19 | 1367691283 | 0 |
| 81.133.80.20 | 1367691284 | 0 |
| 81.133.80.21 | 1367691285 | 0 |
| 81.133.80.22 | 1367691286 | 0 |
| 81.133.80.23 | 1367691287 | 0 |
| 81.133.80.24 | 1367691288 | 0 |
| 81.133.80.25 | 1367691289 | 0 |
| 81.133.80.26 | 1367691290 | 0 |
| 81.133.80.27 | 1367691291 | 0 |
| 81.133.80.28 | 1367691292 | 0 |
| 81.133.80.29 | 1367691293 | 0 |
| 81.133.80.30 | 1367691294 | 0 |
| 81.133.80.31 | 1367691295 | 0 |
| 81.133.80.32 | 1367691296 | 0 |
| 81.133.80.33 | 1367691297 | 0 |
| 81.133.80.34 | 1367691298 | 0 |
| 81.133.80.35 | 1367691299 | 0 |
| 81.133.80.36 | 1367691300 | 0 |
| 81.133.80.37 | 1367691301 | 0 |
| 81.133.80.38 | 1367691302 | 0 |
| 81.133.80.39 | 1367691303 | 0 |
| 81.133.80.40 | 1367691304 | 0 |
| 81.133.80.41 | 1367691305 | 0 |
| 81.133.80.42 | 1367691306 | 0 |
| 81.133.80.43 | 1367691307 | 0 |
| 81.133.80.44 | 1367691308 | 0 |
| 81.133.80.45 | 1367691309 | 0 |
| 81.133.80.46 | 1367691310 | 0 |
| 81.133.80.47 | 1367691311 | 0 |
| 81.133.80.48 | 1367691312 | 0 |
| 81.133.80.49 | 1367691313 | 0 |
| 81.133.80.50 | 1367691314 | 0 |
| 81.133.80.51 | 1367691315 | 0 |
| 81.133.80.52 | 1367691316 | 0 |
| 81.133.80.53 | 1367691317 | 0 |
| 81.133.80.54 | 1367691318 | 0 |
| 81.133.80.55 | 1367691319 | 0 |
| 81.133.80.56 | 1367691320 | 0 |
| 81.133.80.57 | 1367691321 | 0 |
| 81.133.80.58 | 1367691322 | 0 |
| 81.133.80.59 | 1367691323 | 0 |
| 81.133.80.60 | 1367691324 | 0 |
| 81.133.80.61 | 1367691325 | 0 |
| 81.133.80.62 | 1367691326 | 0 |
| 81.133.80.63 | 1367691327 | 0 |
| 81.133.80.64 | 1367691328 | 0 |
| 81.133.80.65 | 1367691329 | 0 |
| 81.133.80.66 | 1367691330 | 0 |
| 81.133.80.67 | 1367691331 | 0 |
| 81.133.80.68 | 1367691332 | 0 |
| 81.133.80.69 | 1367691333 | 0 |
| 81.133.80.70 | 1367691334 | 0 |
| 81.133.80.71 | 1367691335 | 0 |
| 81.133.80.72 | 1367691336 | 0 |
| 81.133.80.73 | 1367691337 | 0 |
| 81.133.80.74 | 1367691338 | 0 |
| 81.133.80.75 | 1367691339 | 0 |
| 81.133.80.76 | 1367691340 | 0 |
| 81.133.80.77 | 1367691341 | 0 |
| 81.133.80.78 | 1367691342 | 0 |
| 81.133.80.79 | 1367691343 | 0 |
| 81.133.80.80 | 1367691344 | 0 |
| 81.133.80.81 | 1367691345 | 0 |
| 81.133.80.82 | 1367691346 | 0 |
| 81.133.80.83 | 1367691347 | 0 |
| 81.133.80.84 | 1367691348 | 0 |
| 81.133.80.85 | 1367691349 | 0 |