The IP address 81.135.73 is provided by BTnet UK Regional network, it's belong to the CDIR (Classless Inter-Domain Routing) 81.128.0.0/11 (range 81.128.0.0 to 81.159.255.255). The autonomous system number (ASN) is 2856.
| ASN | 2856 |
| IP starting by | 81.128.0.0 |
| IP ending by | 81.159.255.255 |
| ASN Name | BTnet UK Regional network |
| CDIR | 81.128.0.0/11 |
| Numerical IP | |
| Registry | ripencc |
| Last update | 04/07/2017 |

| Country Code | Country | Region | City | Latitude | Longitude | Last update | |
| IP2Location | GB | United Kingdom | - | Stevenage | 51.9022 | -0.2026 | 2017-07-04 |
| MaxMind | GB | United Kingdom | - | Maida Vale | 51.5274 | -0.1899 | 2017-07-04 |
| Whois | GB | - | - | - | -3 | 55 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 81.135.73.0 | 1367820544 | 0 |
| 81.135.73.1 | 1367820545 | 0 |
| 81.135.73.2 | 1367820546 | 0 |
| 81.135.73.3 | 1367820547 | 0 |
| 81.135.73.4 | 1367820548 | 0 |
| 81.135.73.5 | 1367820549 | 0 |
| 81.135.73.6 | 1367820550 | 0 |
| 81.135.73.7 | 1367820551 | 0 |
| 81.135.73.8 | 1367820552 | 0 |
| 81.135.73.9 | 1367820553 | 0 |
| 81.135.73.10 | 1367820554 | 0 |
| 81.135.73.11 | 1367820555 | 0 |
| 81.135.73.12 | 1367820556 | 0 |
| 81.135.73.13 | 1367820557 | 0 |
| 81.135.73.14 | 1367820558 | 0 |
| 81.135.73.15 | 1367820559 | 0 |
| 81.135.73.16 | 1367820560 | 0 |
| 81.135.73.17 | 1367820561 | 0 |
| 81.135.73.18 | 1367820562 | 0 |
| 81.135.73.19 | 1367820563 | 0 |
| 81.135.73.20 | 1367820564 | 0 |
| 81.135.73.21 | 1367820565 | 0 |
| 81.135.73.22 | 1367820566 | 0 |
| 81.135.73.23 | 1367820567 | 0 |
| 81.135.73.24 | 1367820568 | 0 |
| 81.135.73.25 | 1367820569 | 0 |
| 81.135.73.26 | 1367820570 | 0 |
| 81.135.73.27 | 1367820571 | 0 |
| 81.135.73.28 | 1367820572 | 0 |
| 81.135.73.29 | 1367820573 | 0 |
| 81.135.73.30 | 1367820574 | 0 |
| 81.135.73.31 | 1367820575 | 0 |
| 81.135.73.32 | 1367820576 | 0 |
| 81.135.73.33 | 1367820577 | 0 |
| 81.135.73.34 | 1367820578 | 0 |
| 81.135.73.35 | 1367820579 | 0 |
| 81.135.73.36 | 1367820580 | 0 |
| 81.135.73.37 | 1367820581 | 0 |
| 81.135.73.38 | 1367820582 | 0 |
| 81.135.73.39 | 1367820583 | 0 |
| 81.135.73.40 | 1367820584 | 0 |
| 81.135.73.41 | 1367820585 | 0 |
| 81.135.73.42 | 1367820586 | 0 |
| 81.135.73.43 | 1367820587 | 0 |
| 81.135.73.44 | 1367820588 | 0 |
| 81.135.73.45 | 1367820589 | 0 |
| 81.135.73.46 | 1367820590 | 0 |
| 81.135.73.47 | 1367820591 | 0 |
| 81.135.73.48 | 1367820592 | 0 |
| 81.135.73.49 | 1367820593 | 0 |
| 81.135.73.50 | 1367820594 | 0 |
| 81.135.73.51 | 1367820595 | 0 |
| 81.135.73.52 | 1367820596 | 0 |
| 81.135.73.53 | 1367820597 | 0 |
| 81.135.73.54 | 1367820598 | 0 |
| 81.135.73.55 | 1367820599 | 0 |
| 81.135.73.56 | 1367820600 | 0 |
| 81.135.73.57 | 1367820601 | 0 |
| 81.135.73.58 | 1367820602 | 0 |
| 81.135.73.59 | 1367820603 | 0 |
| 81.135.73.60 | 1367820604 | 0 |
| 81.135.73.61 | 1367820605 | 0 |
| 81.135.73.62 | 1367820606 | 0 |
| 81.135.73.63 | 1367820607 | 0 |
| 81.135.73.64 | 1367820608 | 0 |
| 81.135.73.65 | 1367820609 | 0 |
| 81.135.73.66 | 1367820610 | 0 |
| 81.135.73.67 | 1367820611 | 0 |
| 81.135.73.68 | 1367820612 | 0 |
| 81.135.73.69 | 1367820613 | 0 |
| 81.135.73.70 | 1367820614 | 0 |
| 81.135.73.71 | 1367820615 | 0 |
| 81.135.73.72 | 1367820616 | 0 |
| 81.135.73.73 | 1367820617 | 0 |
| 81.135.73.74 | 1367820618 | 0 |
| 81.135.73.75 | 1367820619 | 0 |
| 81.135.73.76 | 1367820620 | 0 |
| 81.135.73.77 | 1367820621 | 0 |
| 81.135.73.78 | 1367820622 | 0 |
| 81.135.73.79 | 1367820623 | 0 |
| 81.135.73.80 | 1367820624 | 0 |
| 81.135.73.81 | 1367820625 | 0 |
| 81.135.73.82 | 1367820626 | 0 |
| 81.135.73.83 | 1367820627 | 0 |
| 81.135.73.84 | 1367820628 | 0 |
| 81.135.73.85 | 1367820629 | 0 |