L'indirizzo IP 216.21.37 è fornito da First Communications LLC, che è di proprietà del CIDR (Classless Inter-Domain Routing) 216.21.32.0/19, IP tra 216.21.32.0 a 216.21.63.255 ). Il numero di sistema autonomo (ASN) è 16399.
| ASN | 16399 |
| IP inizia con | 216.21.32.0 |
| IP finale con | 216.21.63.255 |
| ASN Nome | First Communications LLC |
| CDIR | 216.21.32.0/19 |
| IP numerico | |
| Registe | arin |
| Ultimo aggiornamento | 09/10/2017 |

| Codice paese | Paese | Regione | Città | Latitude | Longitude | Ultimo aggiornamento | |
| IP2Location | US | United States | - | Chicago | 41,8952 | -87,6219 | 2017-10-09 |
| MaxMind | US | United States | - | Akron | 41,1537 | -81,6374 | 2017-10-09 |
| Whois | US | - | - | - | -96 | 37 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 216.21.37.0 | 3625264384 | 0 |
| 216.21.37.1 | 3625264385 | 0 |
| 216.21.37.2 | 3625264386 | 0 |
| 216.21.37.3 | 3625264387 | 0 |
| 216.21.37.4 | 3625264388 | 0 |
| 216.21.37.5 | 3625264389 | 0 |
| 216.21.37.6 | 3625264390 | 0 |
| 216.21.37.7 | 3625264391 | 0 |
| 216.21.37.8 | 3625264392 | 0 |
| 216.21.37.9 | 3625264393 | 0 |
| 216.21.37.10 | 3625264394 | 0 |
| 216.21.37.11 | 3625264395 | 0 |
| 216.21.37.12 | 3625264396 | 0 |
| 216.21.37.13 | 3625264397 | 0 |
| 216.21.37.14 | 3625264398 | 0 |
| 216.21.37.15 | 3625264399 | 0 |
| 216.21.37.16 | 3625264400 | 0 |
| 216.21.37.17 | 3625264401 | 0 |
| 216.21.37.18 | 3625264402 | 0 |
| 216.21.37.19 | 3625264403 | 0 |
| 216.21.37.20 | 3625264404 | 0 |
| 216.21.37.21 | 3625264405 | 0 |
| 216.21.37.22 | 3625264406 | 0 |
| 216.21.37.23 | 3625264407 | 0 |
| 216.21.37.24 | 3625264408 | 0 |
| 216.21.37.25 | 3625264409 | 0 |
| 216.21.37.26 | 3625264410 | 0 |
| 216.21.37.27 | 3625264411 | 0 |
| 216.21.37.28 | 3625264412 | 0 |
| 216.21.37.29 | 3625264413 | 0 |
| 216.21.37.30 | 3625264414 | 0 |
| 216.21.37.31 | 3625264415 | 0 |
| 216.21.37.32 | 3625264416 | 0 |
| 216.21.37.33 | 3625264417 | 0 |
| 216.21.37.34 | 3625264418 | 0 |
| 216.21.37.35 | 3625264419 | 0 |
| 216.21.37.36 | 3625264420 | 0 |
| 216.21.37.37 | 3625264421 | 0 |
| 216.21.37.38 | 3625264422 | 0 |
| 216.21.37.39 | 3625264423 | 0 |
| 216.21.37.40 | 3625264424 | 0 |
| 216.21.37.41 | 3625264425 | 0 |
| 216.21.37.42 | 3625264426 | 0 |
| 216.21.37.43 | 3625264427 | 0 |
| 216.21.37.44 | 3625264428 | 0 |
| 216.21.37.45 | 3625264429 | 0 |
| 216.21.37.46 | 3625264430 | 0 |
| 216.21.37.47 | 3625264431 | 0 |
| 216.21.37.48 | 3625264432 | 0 |
| 216.21.37.49 | 3625264433 | 0 |
| 216.21.37.50 | 3625264434 | 0 |
| 216.21.37.51 | 3625264435 | 0 |
| 216.21.37.52 | 3625264436 | 0 |
| 216.21.37.53 | 3625264437 | 0 |
| 216.21.37.54 | 3625264438 | 0 |
| 216.21.37.55 | 3625264439 | 0 |
| 216.21.37.56 | 3625264440 | 0 |
| 216.21.37.57 | 3625264441 | 0 |
| 216.21.37.58 | 3625264442 | 0 |
| 216.21.37.59 | 3625264443 | 0 |
| 216.21.37.60 | 3625264444 | 0 |
| 216.21.37.61 | 3625264445 | 0 |
| 216.21.37.62 | 3625264446 | 0 |
| 216.21.37.63 | 3625264447 | 0 |
| 216.21.37.64 | 3625264448 | 0 |
| 216.21.37.65 | 3625264449 | 0 |
| 216.21.37.66 | 3625264450 | 0 |
| 216.21.37.67 | 3625264451 | 0 |
| 216.21.37.68 | 3625264452 | 0 |
| 216.21.37.69 | 3625264453 | 0 |
| 216.21.37.70 | 3625264454 | 0 |
| 216.21.37.71 | 3625264455 | 0 |
| 216.21.37.72 | 3625264456 | 0 |
| 216.21.37.73 | 3625264457 | 0 |
| 216.21.37.74 | 3625264458 | 0 |
| 216.21.37.75 | 3625264459 | 0 |
| 216.21.37.76 | 3625264460 | 0 |
| 216.21.37.77 | 3625264461 | 0 |
| 216.21.37.78 | 3625264462 | 0 |
| 216.21.37.79 | 3625264463 | 0 |
| 216.21.37.80 | 3625264464 | 0 |
| 216.21.37.81 | 3625264465 | 0 |
| 216.21.37.82 | 3625264466 | 0 |
| 216.21.37.83 | 3625264467 | 0 |
| 216.21.37.84 | 3625264468 | 0 |
| 216.21.37.85 | 3625264469 | 0 |