Die IP-Adresse 51.73.21 erfolgt über Microsoft Corporation, es hat gehören zu den GGDV (Classless Inter-Domain Routing) 51.103.0.0/16 (Bereich 51.103.0.0, 51.103.255.255). Die autonomen Systemnummer (ASN) ist 8075.
| ASN | 8075 |
| Ausgehend von IP | 51.103.0.0 |
| Beendigung durch IP | 51.103.255.255 |
| ASN-Namen | Microsoft Corporation |
| GGDV | 51.103.0.0/16 |
| Numerische IP | |
| Registrierung | arin |
| Letztes update | 13.12.2018 |

| Vorwahl des Landes | Land | Region | Stadt | Breitengrad | Länge | Letztes update | |
| IP2Location | GB | Vereinigtes Königreich | - | London | 51,5085 | -0,1257 | 2018-12-12 |
| MaxMind | GB | Großbritannien und Nordirland | - | - | 51,4964 | -0,1224 | 2018-12-12 |
| Whois | US | - | - | - | -96 | 37 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 51.73.21.0 | 860427520 | 0 |
| 51.73.21.1 | 860427521 | 0 |
| 51.73.21.2 | 860427522 | 0 |
| 51.73.21.3 | 860427523 | 0 |
| 51.73.21.4 | 860427524 | 0 |
| 51.73.21.5 | 860427525 | 0 |
| 51.73.21.6 | 860427526 | 0 |
| 51.73.21.7 | 860427527 | 0 |
| 51.73.21.8 | 860427528 | 0 |
| 51.73.21.9 | 860427529 | 0 |
| 51.73.21.10 | 860427530 | 0 |
| 51.73.21.11 | 860427531 | 0 |
| 51.73.21.12 | 860427532 | 0 |
| 51.73.21.13 | 860427533 | 0 |
| 51.73.21.14 | 860427534 | 0 |
| 51.73.21.15 | 860427535 | 0 |
| 51.73.21.16 | 860427536 | 0 |
| 51.73.21.17 | 860427537 | 0 |
| 51.73.21.18 | 860427538 | 0 |
| 51.73.21.19 | 860427539 | 0 |
| 51.73.21.20 | 860427540 | 0 |
| 51.73.21.21 | 860427541 | 0 |
| 51.73.21.22 | 860427542 | 0 |
| 51.73.21.23 | 860427543 | 0 |
| 51.73.21.24 | 860427544 | 0 |
| 51.73.21.25 | 860427545 | 0 |
| 51.73.21.26 | 860427546 | 0 |
| 51.73.21.27 | 860427547 | 0 |
| 51.73.21.28 | 860427548 | 0 |
| 51.73.21.29 | 860427549 | 0 |
| 51.73.21.30 | 860427550 | 0 |
| 51.73.21.31 | 860427551 | 0 |
| 51.73.21.32 | 860427552 | 0 |
| 51.73.21.33 | 860427553 | 0 |
| 51.73.21.34 | 860427554 | 0 |
| 51.73.21.35 | 860427555 | 0 |
| 51.73.21.36 | 860427556 | 0 |
| 51.73.21.37 | 860427557 | 0 |
| 51.73.21.38 | 860427558 | 0 |
| 51.73.21.39 | 860427559 | 0 |
| 51.73.21.40 | 860427560 | 0 |
| 51.73.21.41 | 860427561 | 0 |
| 51.73.21.42 | 860427562 | 0 |
| 51.73.21.43 | 860427563 | 0 |
| 51.73.21.44 | 860427564 | 0 |
| 51.73.21.45 | 860427565 | 0 |
| 51.73.21.46 | 860427566 | 0 |
| 51.73.21.47 | 860427567 | 0 |
| 51.73.21.48 | 860427568 | 0 |
| 51.73.21.49 | 860427569 | 0 |
| 51.73.21.50 | 860427570 | 0 |
| 51.73.21.51 | 860427571 | 0 |
| 51.73.21.52 | 860427572 | 0 |
| 51.73.21.53 | 860427573 | 0 |
| 51.73.21.54 | 860427574 | 0 |
| 51.73.21.55 | 860427575 | 0 |
| 51.73.21.56 | 860427576 | 0 |
| 51.73.21.57 | 860427577 | 0 |
| 51.73.21.58 | 860427578 | 0 |
| 51.73.21.59 | 860427579 | 0 |
| 51.73.21.60 | 860427580 | 0 |
| 51.73.21.61 | 860427581 | 0 |
| 51.73.21.62 | 860427582 | 0 |
| 51.73.21.63 | 860427583 | 0 |
| 51.73.21.64 | 860427584 | 0 |
| 51.73.21.65 | 860427585 | 0 |
| 51.73.21.66 | 860427586 | 0 |
| 51.73.21.67 | 860427587 | 0 |
| 51.73.21.68 | 860427588 | 0 |
| 51.73.21.69 | 860427589 | 0 |
| 51.73.21.70 | 860427590 | 0 |
| 51.73.21.71 | 860427591 | 0 |
| 51.73.21.72 | 860427592 | 0 |
| 51.73.21.73 | 860427593 | 0 |
| 51.73.21.74 | 860427594 | 0 |
| 51.73.21.75 | 860427595 | 0 |
| 51.73.21.76 | 860427596 | 0 |
| 51.73.21.77 | 860427597 | 0 |
| 51.73.21.78 | 860427598 | 0 |
| 51.73.21.79 | 860427599 | 0 |
| 51.73.21.80 | 860427600 | 0 |
| 51.73.21.81 | 860427601 | 0 |
| 51.73.21.82 | 860427602 | 0 |
| 51.73.21.83 | 860427603 | 0 |
| 51.73.21.84 | 860427604 | 0 |
| 51.73.21.85 | 860427605 | 0 |