The IP address 21.91.55 is provided by China Education and Research Network Center, it's belong to the CDIR (Classless Inter-Domain Routing) 22.30.204.0/23 (range 22.30.204.0 to 22.30.205.255). The autonomous system number (ASN) is 4538.
| ASN | 4538 |
| IP starting by | 22.30.204.0 |
| IP ending by | 22.30.205.255 |
| ASN Name | China Education and Research Network Center |
| CDIR | 22.30.204.0/23 |
| Numerical IP | |
| Registry | |
| Last update | 08/10/2017 |

| Country Code | Country | Region | City | Latitude | Longitude | Last update | |
| IP2Location | US | United States | - | Columbus | 39.9664 | -83.0128 | 2017-10-08 |
| MaxMind | US | United States | - | - | 37.751 | -97.822 | 2017-10-08 |
| Whois | US | - | - | - | -96 | 37 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 21.91.55.0 | 358299392 | 0 |
| 21.91.55.1 | 358299393 | 0 |
| 21.91.55.2 | 358299394 | 0 |
| 21.91.55.3 | 358299395 | 0 |
| 21.91.55.4 | 358299396 | 0 |
| 21.91.55.5 | 358299397 | 0 |
| 21.91.55.6 | 358299398 | 0 |
| 21.91.55.7 | 358299399 | 0 |
| 21.91.55.8 | 358299400 | 0 |
| 21.91.55.9 | 358299401 | 0 |
| 21.91.55.10 | 358299402 | 0 |
| 21.91.55.11 | 358299403 | 0 |
| 21.91.55.12 | 358299404 | 0 |
| 21.91.55.13 | 358299405 | 0 |
| 21.91.55.14 | 358299406 | 0 |
| 21.91.55.15 | 358299407 | 0 |
| 21.91.55.16 | 358299408 | 0 |
| 21.91.55.17 | 358299409 | 0 |
| 21.91.55.18 | 358299410 | 0 |
| 21.91.55.19 | 358299411 | 0 |
| 21.91.55.20 | 358299412 | 0 |
| 21.91.55.21 | 358299413 | 0 |
| 21.91.55.22 | 358299414 | 0 |
| 21.91.55.23 | 358299415 | 0 |
| 21.91.55.24 | 358299416 | 0 |
| 21.91.55.25 | 358299417 | 0 |
| 21.91.55.26 | 358299418 | 0 |
| 21.91.55.27 | 358299419 | 0 |
| 21.91.55.28 | 358299420 | 0 |
| 21.91.55.29 | 358299421 | 0 |
| 21.91.55.30 | 358299422 | 0 |
| 21.91.55.31 | 358299423 | 0 |
| 21.91.55.32 | 358299424 | 0 |
| 21.91.55.33 | 358299425 | 0 |
| 21.91.55.34 | 358299426 | 0 |
| 21.91.55.35 | 358299427 | 0 |
| 21.91.55.36 | 358299428 | 0 |
| 21.91.55.37 | 358299429 | 0 |
| 21.91.55.38 | 358299430 | 0 |
| 21.91.55.39 | 358299431 | 0 |
| 21.91.55.40 | 358299432 | 0 |
| 21.91.55.41 | 358299433 | 0 |
| 21.91.55.42 | 358299434 | 0 |
| 21.91.55.43 | 358299435 | 0 |
| 21.91.55.44 | 358299436 | 0 |
| 21.91.55.45 | 358299437 | 0 |
| 21.91.55.46 | 358299438 | 0 |
| 21.91.55.47 | 358299439 | 0 |
| 21.91.55.48 | 358299440 | 0 |
| 21.91.55.49 | 358299441 | 0 |
| 21.91.55.50 | 358299442 | 0 |
| 21.91.55.51 | 358299443 | 0 |
| 21.91.55.52 | 358299444 | 0 |
| 21.91.55.53 | 358299445 | 0 |
| 21.91.55.54 | 358299446 | 0 |
| 21.91.55.55 | 358299447 | 0 |
| 21.91.55.56 | 358299448 | 0 |
| 21.91.55.57 | 358299449 | 0 |
| 21.91.55.58 | 358299450 | 0 |
| 21.91.55.59 | 358299451 | 0 |
| 21.91.55.60 | 358299452 | 0 |
| 21.91.55.61 | 358299453 | 0 |
| 21.91.55.62 | 358299454 | 0 |
| 21.91.55.63 | 358299455 | 0 |
| 21.91.55.64 | 358299456 | 0 |
| 21.91.55.65 | 358299457 | 0 |
| 21.91.55.66 | 358299458 | 0 |
| 21.91.55.67 | 358299459 | 0 |
| 21.91.55.68 | 358299460 | 0 |
| 21.91.55.69 | 358299461 | 0 |
| 21.91.55.70 | 358299462 | 0 |
| 21.91.55.71 | 358299463 | 0 |
| 21.91.55.72 | 358299464 | 0 |
| 21.91.55.73 | 358299465 | 0 |
| 21.91.55.74 | 358299466 | 0 |
| 21.91.55.75 | 358299467 | 0 |
| 21.91.55.76 | 358299468 | 0 |
| 21.91.55.77 | 358299469 | 0 |
| 21.91.55.78 | 358299470 | 0 |
| 21.91.55.79 | 358299471 | 0 |
| 21.91.55.80 | 358299472 | 0 |
| 21.91.55.81 | 358299473 | 0 |
| 21.91.55.82 | 358299474 | 0 |
| 21.91.55.83 | 358299475 | 0 |
| 21.91.55.84 | 358299476 | 0 |
| 21.91.55.85 | 358299477 | 0 |