La dirección IP 172.0.121 es proporcionada por AT&T Services, Inc., que es propiedad de la CIDR (Classless Inter-Domain Routing) 172.0.0.0/12, IP entre 172.0.0.0 a 172.15.255.255 ). El número de sistema autónomo (ASN) es 7018.
| ASN | 7018 |
| IP que comienzan con | 172.0.0.0 |
| IP que termina con | 172.15.255.255 |
| ASN Nombre | AT&T Services, Inc. |
| CDIR | 172.0.0.0/12 |
| IP numérica | |
| Registe | arin |
| Última actualización | 29/07/2017 |

| Código País | País | Región | Ciudad | Latitud | Longitud | Última actualización | |
| IP2Location | US | Estados Unidos | - | Saint Louis | 38,6273 | -90,1979 | 2017-07-29 |
| MaxMind | US | Estados Unidos | - | Hillsboro | 38,2631 | -90,5689 | 2017-07-29 |
| Whois | US | - | - | - | -96 | 37 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 172.0.121.0 | 2885712128 | 0 |
| 172.0.121.1 | 2885712129 | 0 |
| 172.0.121.2 | 2885712130 | 0 |
| 172.0.121.3 | 2885712131 | 0 |
| 172.0.121.4 | 2885712132 | 0 |
| 172.0.121.5 | 2885712133 | 0 |
| 172.0.121.6 | 2885712134 | 0 |
| 172.0.121.7 | 2885712135 | 0 |
| 172.0.121.8 | 2885712136 | 0 |
| 172.0.121.9 | 2885712137 | 0 |
| 172.0.121.10 | 2885712138 | 0 |
| 172.0.121.11 | 2885712139 | 0 |
| 172.0.121.12 | 2885712140 | 0 |
| 172.0.121.13 | 2885712141 | 0 |
| 172.0.121.14 | 2885712142 | 0 |
| 172.0.121.15 | 2885712143 | 0 |
| 172.0.121.16 | 2885712144 | 0 |
| 172.0.121.17 | 2885712145 | 0 |
| 172.0.121.18 | 2885712146 | 0 |
| 172.0.121.19 | 2885712147 | 0 |
| 172.0.121.20 | 2885712148 | 0 |
| 172.0.121.21 | 2885712149 | 0 |
| 172.0.121.22 | 2885712150 | 0 |
| 172.0.121.23 | 2885712151 | 0 |
| 172.0.121.24 | 2885712152 | 0 |
| 172.0.121.25 | 2885712153 | 0 |
| 172.0.121.26 | 2885712154 | 0 |
| 172.0.121.27 | 2885712155 | 0 |
| 172.0.121.28 | 2885712156 | 0 |
| 172.0.121.29 | 2885712157 | 0 |
| 172.0.121.30 | 2885712158 | 0 |
| 172.0.121.31 | 2885712159 | 0 |
| 172.0.121.32 | 2885712160 | 0 |
| 172.0.121.33 | 2885712161 | 0 |
| 172.0.121.34 | 2885712162 | 0 |
| 172.0.121.35 | 2885712163 | 0 |
| 172.0.121.36 | 2885712164 | 0 |
| 172.0.121.37 | 2885712165 | 0 |
| 172.0.121.38 | 2885712166 | 0 |
| 172.0.121.39 | 2885712167 | 0 |
| 172.0.121.40 | 2885712168 | 0 |
| 172.0.121.41 | 2885712169 | 0 |
| 172.0.121.42 | 2885712170 | 0 |
| 172.0.121.43 | 2885712171 | 0 |
| 172.0.121.44 | 2885712172 | 0 |
| 172.0.121.45 | 2885712173 | 0 |
| 172.0.121.46 | 2885712174 | 0 |
| 172.0.121.47 | 2885712175 | 0 |
| 172.0.121.48 | 2885712176 | 0 |
| 172.0.121.49 | 2885712177 | 0 |
| 172.0.121.50 | 2885712178 | 0 |
| 172.0.121.51 | 2885712179 | 0 |
| 172.0.121.52 | 2885712180 | 0 |
| 172.0.121.53 | 2885712181 | 0 |
| 172.0.121.54 | 2885712182 | 0 |
| 172.0.121.55 | 2885712183 | 0 |
| 172.0.121.56 | 2885712184 | 0 |
| 172.0.121.57 | 2885712185 | 0 |
| 172.0.121.58 | 2885712186 | 0 |
| 172.0.121.59 | 2885712187 | 0 |
| 172.0.121.60 | 2885712188 | 0 |
| 172.0.121.61 | 2885712189 | 0 |
| 172.0.121.62 | 2885712190 | 0 |
| 172.0.121.63 | 2885712191 | 0 |
| 172.0.121.64 | 2885712192 | 0 |
| 172.0.121.65 | 2885712193 | 0 |
| 172.0.121.66 | 2885712194 | 0 |
| 172.0.121.67 | 2885712195 | 0 |
| 172.0.121.68 | 2885712196 | 0 |
| 172.0.121.69 | 2885712197 | 0 |
| 172.0.121.70 | 2885712198 | 0 |
| 172.0.121.71 | 2885712199 | 0 |
| 172.0.121.72 | 2885712200 | 0 |
| 172.0.121.73 | 2885712201 | 0 |
| 172.0.121.74 | 2885712202 | 0 |
| 172.0.121.75 | 2885712203 | 0 |
| 172.0.121.76 | 2885712204 | 0 |
| 172.0.121.77 | 2885712205 | 0 |
| 172.0.121.78 | 2885712206 | 0 |
| 172.0.121.79 | 2885712207 | 0 |
| 172.0.121.80 | 2885712208 | 0 |
| 172.0.121.81 | 2885712209 | 0 |
| 172.0.121.82 | 2885712210 | 0 |
| 172.0.121.83 | 2885712211 | 0 |
| 172.0.121.84 | 2885712212 | 0 |
| 172.0.121.85 | 2885712213 | 0 |