Les adresses IP débutant par 2.81.57 sont fournies par , elles appartiennent au CIDR (Classless Inter-Domain Routing) 2.80.0.0/14, le bloc IP comprant les adresses de 2.80.0.0 à 2.83.255.255). Le numéro de système autonome (ASN) est 3243.
| ASN | 3243 |
| IP commençant par | 2.80.0.0 |
| IP se terminant par | 2.83.255.255 |
| Nom ASN | |
| CDIR | 2.80.0.0/14 |
| IP numérique | |
| Registe | ripencc |
| Dernière mise à jour | 23/07/2017 |

| Code pays | Pays | Région | Ville | Latitude | Longitude | Dernière mise à jour | |
| IP2Location | PT | Portugal | - | Satao | 40,7418 | -7,7329 | 2017-07-03 |
| MaxMind | PT | Portugal | - | Penafiel | 41,2083 | -8,2828 | 2017-07-03 |
| Whois | PT | - | - | - | -8 | 39 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 2.81.57.0 | 38877440 | 0 |
| 2.81.57.1 | 38877441 | 0 |
| 2.81.57.2 | 38877442 | 0 |
| 2.81.57.3 | 38877443 | 0 |
| 2.81.57.4 | 38877444 | 0 |
| 2.81.57.5 | 38877445 | 0 |
| 2.81.57.6 | 38877446 | 0 |
| 2.81.57.7 | 38877447 | 0 |
| 2.81.57.8 | 38877448 | 0 |
| 2.81.57.9 | 38877449 | 0 |
| 2.81.57.10 | 38877450 | 0 |
| 2.81.57.11 | 38877451 | 0 |
| 2.81.57.12 | 38877452 | 0 |
| 2.81.57.13 | 38877453 | 0 |
| 2.81.57.14 | 38877454 | 0 |
| 2.81.57.15 | 38877455 | 0 |
| 2.81.57.16 | 38877456 | 0 |
| 2.81.57.17 | 38877457 | 0 |
| 2.81.57.18 | 38877458 | 0 |
| 2.81.57.19 | 38877459 | 0 |
| 2.81.57.20 | 38877460 | 0 |
| 2.81.57.21 | 38877461 | 0 |
| 2.81.57.22 | 38877462 | 0 |
| 2.81.57.23 | 38877463 | 0 |
| 2.81.57.24 | 38877464 | 0 |
| 2.81.57.25 | 38877465 | 0 |
| 2.81.57.26 | 38877466 | 0 |
| 2.81.57.27 | 38877467 | 0 |
| 2.81.57.28 | 38877468 | 0 |
| 2.81.57.29 | 38877469 | 0 |
| 2.81.57.30 | 38877470 | 0 |
| 2.81.57.31 | 38877471 | 0 |
| 2.81.57.32 | 38877472 | 0 |
| 2.81.57.33 | 38877473 | 0 |
| 2.81.57.34 | 38877474 | 0 |
| 2.81.57.35 | 38877475 | 0 |
| 2.81.57.36 | 38877476 | 0 |
| 2.81.57.37 | 38877477 | 0 |
| 2.81.57.38 | 38877478 | 0 |
| 2.81.57.39 | 38877479 | 0 |
| 2.81.57.40 | 38877480 | 0 |
| 2.81.57.41 | 38877481 | 0 |
| 2.81.57.42 | 38877482 | 0 |
| 2.81.57.43 | 38877483 | 0 |
| 2.81.57.44 | 38877484 | 0 |
| 2.81.57.45 | 38877485 | 0 |
| 2.81.57.46 | 38877486 | 0 |
| 2.81.57.47 | 38877487 | 0 |
| 2.81.57.48 | 38877488 | 0 |
| 2.81.57.49 | 38877489 | 0 |
| 2.81.57.50 | 38877490 | 0 |
| 2.81.57.51 | 38877491 | 0 |
| 2.81.57.52 | 38877492 | 0 |
| 2.81.57.53 | 38877493 | 0 |
| 2.81.57.54 | 38877494 | 0 |
| 2.81.57.55 | 38877495 | 0 |
| 2.81.57.56 | 38877496 | 0 |
| 2.81.57.57 | 38877497 | 0 |
| 2.81.57.58 | 38877498 | 0 |
| 2.81.57.59 | 38877499 | 0 |
| 2.81.57.60 | 38877500 | 0 |
| 2.81.57.61 | 38877501 | 0 |
| 2.81.57.62 | 38877502 | 0 |
| 2.81.57.63 | 38877503 | 0 |
| 2.81.57.64 | 38877504 | 0 |
| 2.81.57.65 | 38877505 | 0 |
| 2.81.57.66 | 38877506 | 0 |
| 2.81.57.67 | 38877507 | 0 |
| 2.81.57.68 | 38877508 | 0 |
| 2.81.57.69 | 38877509 | 0 |
| 2.81.57.70 | 38877510 | 0 |
| 2.81.57.71 | 38877511 | 0 |
| 2.81.57.72 | 38877512 | 0 |
| 2.81.57.73 | 38877513 | 0 |
| 2.81.57.74 | 38877514 | 0 |
| 2.81.57.75 | 38877515 | 0 |
| 2.81.57.76 | 38877516 | 0 |
| 2.81.57.77 | 38877517 | 0 |
| 2.81.57.78 | 38877518 | 0 |
| 2.81.57.79 | 38877519 | 0 |
| 2.81.57.80 | 38877520 | 0 |
| 2.81.57.81 | 38877521 | 0 |
| 2.81.57.82 | 38877522 | 0 |
| 2.81.57.83 | 38877523 | 0 |
| 2.81.57.84 | 38877524 | 0 |
| 2.81.57.85 | 38877525 | 0 |