Les adresses IP débutant par 128.231.0 sont fournies par National Institutes of Health, elles appartiennent au CIDR (Classless Inter-Domain Routing) 128.231.0.0/16, le bloc IP comprant les adresses de 128.231.0.0 à 128.231.255.255). Le numéro de système autonome (ASN) est 3527.
| ASN | 3527 |
| IP commençant par | 128.231.0.0 |
| IP se terminant par | 128.231.255.255 |
| Nom ASN | National Institutes of Health |
| CDIR | 128.231.0.0/16 |
| IP numérique | |
| Registe | arin |
| Dernière mise à jour | 16/02/2020 |

| Code pays | Pays | Région | Ville | Latitude | Longitude | Dernière mise à jour | |
| IP2Location | US | États-Unis | - | Rockville | 39,084 | -77,1528 | 2020-02-16 |
| MaxMind | GB | Royaume-Uni | - | Cambridge | 52,2 | 0,1167 | 2020-02-16 |
| Whois | US | - | - | - | -96 | 37 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 128.231.0.0 | 2162622464 | 0 |
| 128.231.0.1 | 2162622465 | 0 |
| 128.231.0.2 | 2162622466 | 0 |
| 128.231.0.3 | 2162622467 | 0 |
| 128.231.0.4 | 2162622468 | 0 |
| 128.231.0.5 | 2162622469 | 0 |
| 128.231.0.6 | 2162622470 | 0 |
| 128.231.0.7 | 2162622471 | 0 |
| 128.231.0.8 | 2162622472 | 0 |
| 128.231.0.9 | 2162622473 | 0 |
| 128.231.0.10 | 2162622474 | 0 |
| 128.231.0.11 | 2162622475 | 0 |
| 128.231.0.12 | 2162622476 | 0 |
| 128.231.0.13 | 2162622477 | 0 |
| 128.231.0.14 | 2162622478 | 0 |
| 128.231.0.15 | 2162622479 | 0 |
| 128.231.0.16 | 2162622480 | 0 |
| 128.231.0.17 | 2162622481 | 0 |
| 128.231.0.18 | 2162622482 | 0 |
| 128.231.0.19 | 2162622483 | 0 |
| 128.231.0.20 | 2162622484 | 0 |
| 128.231.0.21 | 2162622485 | 0 |
| 128.231.0.22 | 2162622486 | 0 |
| 128.231.0.23 | 2162622487 | 0 |
| 128.231.0.24 | 2162622488 | 0 |
| 128.231.0.25 | 2162622489 | 0 |
| 128.231.0.26 | 2162622490 | 0 |
| 128.231.0.27 | 2162622491 | 0 |
| 128.231.0.28 | 2162622492 | 0 |
| 128.231.0.29 | 2162622493 | 0 |
| 128.231.0.30 | 2162622494 | 0 |
| 128.231.0.31 | 2162622495 | 0 |
| 128.231.0.32 | 2162622496 | 0 |
| 128.231.0.33 | 2162622497 | 0 |
| 128.231.0.34 | 2162622498 | 0 |
| 128.231.0.35 | 2162622499 | 0 |
| 128.231.0.36 | 2162622500 | 0 |
| 128.231.0.37 | 2162622501 | 0 |
| 128.231.0.38 | 2162622502 | 0 |
| 128.231.0.39 | 2162622503 | 0 |
| 128.231.0.40 | 2162622504 | 0 |
| 128.231.0.41 | 2162622505 | 0 |
| 128.231.0.42 | 2162622506 | 0 |
| 128.231.0.43 | 2162622507 | 0 |
| 128.231.0.44 | 2162622508 | 0 |
| 128.231.0.45 | 2162622509 | 0 |
| 128.231.0.46 | 2162622510 | 0 |
| 128.231.0.47 | 2162622511 | 0 |
| 128.231.0.48 | 2162622512 | 0 |
| 128.231.0.49 | 2162622513 | 0 |
| 128.231.0.50 | 2162622514 | 0 |
| 128.231.0.51 | 2162622515 | 0 |
| 128.231.0.52 | 2162622516 | 0 |
| 128.231.0.53 | 2162622517 | 0 |
| 128.231.0.54 | 2162622518 | 0 |
| 128.231.0.55 | 2162622519 | 0 |
| 128.231.0.56 | 2162622520 | 0 |
| 128.231.0.57 | 2162622521 | 0 |
| 128.231.0.58 | 2162622522 | 0 |
| 128.231.0.59 | 2162622523 | 0 |
| 128.231.0.60 | 2162622524 | 0 |
| 128.231.0.61 | 2162622525 | 0 |
| 128.231.0.62 | 2162622526 | 0 |
| 128.231.0.63 | 2162622527 | 0 |
| 128.231.0.64 | 2162622528 | 0 |
| 128.231.0.65 | 2162622529 | 0 |
| 128.231.0.66 | 2162622530 | 0 |
| 128.231.0.67 | 2162622531 | 0 |
| 128.231.0.68 | 2162622532 | 0 |
| 128.231.0.69 | 2162622533 | 0 |
| 128.231.0.70 | 2162622534 | 0 |
| 128.231.0.71 | 2162622535 | 0 |
| 128.231.0.72 | 2162622536 | 0 |
| 128.231.0.73 | 2162622537 | 0 |
| 128.231.0.74 | 2162622538 | 0 |
| 128.231.0.75 | 2162622539 | 0 |
| 128.231.0.76 | 2162622540 | 0 |
| 128.231.0.77 | 2162622541 | 0 |
| 128.231.0.78 | 2162622542 | 0 |
| 128.231.0.79 | 2162622543 | 0 |
| 128.231.0.80 | 2162622544 | 0 |
| 128.231.0.81 | 2162622545 | 0 |
| 128.231.0.82 | 2162622546 | 0 |
| 128.231.0.83 | 2162622547 | 0 |
| 128.231.0.84 | 2162622548 | 0 |
| 128.231.0.85 | 2162622549 | 0 |