The IP address 51.91.21 is provided by Microsoft Corporation, it's belong to the CDIR (Classless Inter-Domain Routing) 51.103.0.0/16 (range 51.103.0.0 to 51.103.255.255). The autonomous system number (ASN) is 8075.
| ASN | 8075 |
| IP starting by | 51.103.0.0 |
| IP ending by | 51.103.255.255 |
| ASN Name | Microsoft Corporation |
| CDIR | 51.103.0.0/16 |
| Numerical IP | |
| Registry | ripencc |
| Last update | 04/10/2017 |

| Country Code | Country | Region | City | Latitude | Longitude | Last update | |
| IP2Location | GB | United Kingdom | - | Warrington | 52.1845 | -0.6876 | 2017-10-04 |
| MaxMind | GB | United Kingdom | - | - | 51.4964 | -0.1224 | 2017-10-04 |
| Whois | GB | - | - | - | -3 | 55 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 51.91.21.0 | 861607168 | 0 |
| 51.91.21.1 | 861607169 | 0 |
| 51.91.21.2 | 861607170 | 0 |
| 51.91.21.3 | 861607171 | 0 |
| 51.91.21.4 | 861607172 | 0 |
| 51.91.21.5 | 861607173 | 0 |
| 51.91.21.6 | 861607174 | 0 |
| 51.91.21.7 | 861607175 | 0 |
| 51.91.21.8 | 861607176 | 0 |
| 51.91.21.9 | 861607177 | 0 |
| 51.91.21.10 | 861607178 | 0 |
| 51.91.21.11 | 861607179 | 0 |
| 51.91.21.12 | 861607180 | 0 |
| 51.91.21.13 | 861607181 | 0 |
| 51.91.21.14 | 861607182 | 0 |
| 51.91.21.15 | 861607183 | 0 |
| 51.91.21.16 | 861607184 | 0 |
| 51.91.21.17 | 861607185 | 0 |
| 51.91.21.18 | 861607186 | 0 |
| 51.91.21.19 | 861607187 | 0 |
| 51.91.21.20 | 861607188 | 0 |
| 51.91.21.21 | 861607189 | 0 |
| 51.91.21.22 | 861607190 | 0 |
| 51.91.21.23 | 861607191 | 0 |
| 51.91.21.24 | 861607192 | 0 |
| 51.91.21.25 | 861607193 | 0 |
| 51.91.21.26 | 861607194 | 0 |
| 51.91.21.27 | 861607195 | 0 |
| 51.91.21.28 | 861607196 | 0 |
| 51.91.21.29 | 861607197 | 0 |
| 51.91.21.30 | 861607198 | 0 |
| 51.91.21.31 | 861607199 | 0 |
| 51.91.21.32 | 861607200 | 0 |
| 51.91.21.33 | 861607201 | 0 |
| 51.91.21.34 | 861607202 | 0 |
| 51.91.21.35 | 861607203 | 0 |
| 51.91.21.36 | 861607204 | 0 |
| 51.91.21.37 | 861607205 | 0 |
| 51.91.21.38 | 861607206 | 0 |
| 51.91.21.39 | 861607207 | 0 |
| 51.91.21.40 | 861607208 | 0 |
| 51.91.21.41 | 861607209 | 0 |
| 51.91.21.42 | 861607210 | 0 |
| 51.91.21.43 | 861607211 | 0 |
| 51.91.21.44 | 861607212 | 0 |
| 51.91.21.45 | 861607213 | 0 |
| 51.91.21.46 | 861607214 | 0 |
| 51.91.21.47 | 861607215 | 0 |
| 51.91.21.48 | 861607216 | 0 |
| 51.91.21.49 | 861607217 | 0 |
| 51.91.21.50 | 861607218 | 0 |
| 51.91.21.51 | 861607219 | 0 |
| 51.91.21.52 | 861607220 | 0 |
| 51.91.21.53 | 861607221 | 0 |
| 51.91.21.54 | 861607222 | 0 |
| 51.91.21.55 | 861607223 | 0 |
| 51.91.21.56 | 861607224 | 0 |
| 51.91.21.57 | 861607225 | 0 |
| 51.91.21.58 | 861607226 | 0 |
| 51.91.21.59 | 861607227 | 0 |
| 51.91.21.60 | 861607228 | 0 |
| 51.91.21.61 | 861607229 | 0 |
| 51.91.21.62 | 861607230 | 0 |
| 51.91.21.63 | 861607231 | 0 |
| 51.91.21.64 | 861607232 | 0 |
| 51.91.21.65 | 861607233 | 0 |
| 51.91.21.66 | 861607234 | 0 |
| 51.91.21.67 | 861607235 | 0 |
| 51.91.21.68 | 861607236 | 0 |
| 51.91.21.69 | 861607237 | 0 |
| 51.91.21.70 | 861607238 | 0 |
| 51.91.21.71 | 861607239 | 0 |
| 51.91.21.72 | 861607240 | 0 |
| 51.91.21.73 | 861607241 | 0 |
| 51.91.21.74 | 861607242 | 0 |
| 51.91.21.75 | 861607243 | 0 |
| 51.91.21.76 | 861607244 | 0 |
| 51.91.21.77 | 861607245 | 0 |
| 51.91.21.78 | 861607246 | 0 |
| 51.91.21.79 | 861607247 | 0 |
| 51.91.21.80 | 861607248 | 0 |
| 51.91.21.81 | 861607249 | 0 |
| 51.91.21.82 | 861607250 | 0 |
| 51.91.21.83 | 861607251 | 0 |
| 51.91.21.84 | 861607252 | 0 |
| 51.91.21.85 | 861607253 | 0 |