| 63.81.63.0 | — | — |
| 63.81.63.1 | ps140.ALTER.NET | — |
| 63.81.63.2 | Internet-gw.customer.alter.net | — |
| 63.81.63.3 | — | — |
| 63.81.63.4 | — | — |
| 63.81.63.5 | 500.Serial3-2.GW8.PHL1.ALTER.NET | — |
| 63.81.63.6 | virtua-gw1.customer.alter.net | — |
| 63.81.63.7 | — | — |
| 63.81.63.8 | — | — |
| 63.81.63.9 | 4.xe-7-3-1.GW1.TCO4.ALTER.NET | — |
| 63.81.63.10 | icimutual-gw.customer.alter.net | — |
| 63.81.63.11 | — | — |
| 63.81.63.12 | — | — |
| 63.81.63.13 | Serial1-3-1.GW2.TCO4.ALTER.NET | — |
| 63.81.63.14 | symantec-gw.customer.alter.net | — |
| 63.81.63.15 | — | — |
| 63.81.63.16 | — | — |
| 63.81.63.17 | ALTER.NET | — |
| 63.81.63.18 | customer.alter.net | — |
| 63.81.63.19 | — | — |
| 63.81.63.20 | — | — |
| 63.81.63.21 | — | — |
| 63.81.63.22 | — | — |
| 63.81.63.23 | — | — |
| 63.81.63.24 | — | — |
| 63.81.63.25 | 207.xe-5-0-1-2.GW1.SCL2.ALTER.NET | — |
| 63.81.63.26 | Internet-gw.customer.alter.net | — |
| 63.81.63.27 | — | — |
| 63.81.63.28 | — | — |
| 63.81.63.29 | 89.xe-10-2-0.GW3.PHX2.ALTER.NET | — |
| 63.81.63.30 | Internet-gw.customer.alter.net | — |
| 63.81.63.31 | — | — |
| 63.81.63.32 | — | — |
| 63.81.63.33 | 666.ATM1-0.GW5.DCA6.ALTER.NET | — |
| 63.81.63.34 | mitre-gw.customer.alter.net | — |
| 63.81.63.35 | — | — |
| 63.81.63.36 | — | — |
| 63.81.63.37 | PW-Ether322.ALTER.NET | — |
| 63.81.63.38 | Internet-gw.customer.alter.net | — |
| 63.81.63.39 | — | — |
| 63.81.63.40 | — | — |
| 63.81.63.41 | 55.xe-3-2-0.GW1.NOL1.ALTER.NET | — |
| 63.81.63.42 | Internet-gw.customer.alter.net | — |
| 63.81.63.43 | — | — |
| 63.81.63.44 | — | — |
| 63.81.63.45 | — | — |
| 63.81.63.46 | — | — |
| 63.81.63.47 | — | — |
| 63.81.63.48 | — | — |
| 63.81.63.49 | ALTER.NET | — |
| 63.81.63.50 | customer.alter.net | — |
| 63.81.63.51 | — | — |
| 63.81.63.52 | — | — |
| 63.81.63.53 | ALTER.NET | — |
| 63.81.63.54 | customer.alter.net | — |
| 63.81.63.55 | — | — |
| 63.81.63.56 | — | — |
| 63.81.63.57 | ALTER.NET | — |
| 63.81.63.58 | customer.alter.net | — |
| 63.81.63.59 | — | — |
| 63.81.63.60 | — | — |
| 63.81.63.61 | ALTER.NET | — |
| 63.81.63.62 | customer.alter.net | — |
| 63.81.63.63 | — | — |
| 63.81.63.64 | — | — |
| 63.81.63.65 | 110.xe-1-2-1.GW2.BUF4.ALTER.NET | — |
| 63.81.63.66 | Internet-gw.customer.alter.net | — |
| 63.81.63.67 | — | — |
| 63.81.63.68 | — | — |
| 63.81.63.69 | 250.ATM1-0.GW5.RDU1.ALTER.NET | — |
| 63.81.63.70 | Celanese-EnoreeSC-gw.customer.alter.net | — |
| 63.81.63.71 | — | — |
| 63.81.63.72 | — | — |
| 63.81.63.73 | 200.GigabitEthernet2-0-2.GW12.BOS4.ALTER.NET | — |
| 63.81.63.74 | thing5-gw.customer.alter.net | — |
| 63.81.63.75 | — | — |
| 63.81.63.76 | — | — |
| 63.81.63.77 | 665.ATM1-1.GW5.PHL1.ALTER.NET | — |
| 63.81.63.78 | ntrs-gw.customer.alter.net | — |
| 63.81.63.79 | — | — |
| 63.81.63.80 | — | — |
| 63.81.63.81 | 12.xe-1-1-0.GW1.CLT2.ALTER.NET | — |
| 63.81.63.82 | VERIZONDATASERVICESINC.customer.alter.net | — |
| 63.81.63.83 | — | — |
| 63.81.63.84 | — | — |
| 63.81.63.85 | 500.MFR22-0.GW1.DCA5.ALTER.NET | — |
| 63.81.63.86 | placeproperties-gw.customer.alter.net | — |
| 63.81.63.87 | — | — |
| 63.81.63.88 | — | — |
| 63.81.63.89 | ALTER.NET | — |
| 63.81.63.90 | customer.alter.net | — |
| 63.81.63.91 | — | — |
| 63.81.63.92 | — | — |
| 63.81.63.93 | 486.xe-4-3-0.GW2.DCA6.ALTER.NET | — |
| 63.81.63.94 | LifeTechnologies.customer.alter.net | — |
| 63.81.63.95 | — | — |
| 63.81.63.96 | — | — |
| 63.81.63.97 | 5-2-15.TA1.DCA6.ALTER.NET | — |
| 63.81.63.98 | Internet-gw.customer.alter.net | — |
| 63.81.63.99 | — | — |
| 63.81.63.100 | — | — |
| 63.81.63.101 | 36.xe-5-3-0.GW2.NYC41.ALTER.NET | — |
| 63.81.63.102 | iheartmedia-gw.customer.alter.net | — |
| 63.81.63.103 | — | — |
| 63.81.63.104 | — | — |
| 63.81.63.105 | 201.GigabitEthernet4-0.GW5.RDU1.ALTER.NET | — |
| 63.81.63.106 | deltacom-gw.customer.alter.net | — |
| 63.81.63.107 | — | — |
| 63.81.63.108 | — | — |
| 63.81.63.109 | ALTER.NET | — |
| 63.81.63.110 | customer.alter.net | — |
| 63.81.63.111 | — | — |
| 63.81.63.112 | — | — |
| 63.81.63.113 | ALTER.NET | — |
| 63.81.63.114 | customer.alter.net | — |
| 63.81.63.115 | — | — |
| 63.81.63.116 | — | — |
| 63.81.63.117 | ALTER.NET | — |
| 63.81.63.118 | customer.alter.net | — |
| 63.81.63.119 | — | — |
| 63.81.63.120 | — | — |
| 63.81.63.121 | ALTER.NET | — |
| 63.81.63.122 | customer.alter.net | — |
| 63.81.63.123 | — | — |
| 63.81.63.124 | — | — |
| 63.81.63.125 | 13.xe-3-3-0.GW1.STK3.ALTER.NET | — |
| 63.81.63.126 | Internet-gw.customer.alter.net | — |
| 63.81.63.127 | — | — |
| 63.81.63.128 | — | — |
| 63.81.63.129 | PW-Ether55.ALTER.NET | — |
| 63.81.63.130 | Internet-gw.customer.alter.net | — |
| 63.81.63.131 | — | — |
| 63.81.63.132 | — | — |
| 63.81.63.133 | 225.ATM0-0.GW8.DCA5.ALTER.NET | — |
| 63.81.63.134 | adp-evington-gw.customer.alter.net | — |
| 63.81.63.135 | — | — |
| 63.81.63.136 | — | — |
| 63.81.63.137 | PW-Ether37.ALTER.NET | — |
| 63.81.63.138 | Internet-gw.customer.alter.net | — |
| 63.81.63.139 | — | — |
| 63.81.63.140 | — | — |
| 63.81.63.141 | 72.xe-8-0-1-1.GW12.ATL5.ALTER.NET | — |
| 63.81.63.142 | Internet-gw.customer.alter.net | — |
| 63.81.63.143 | — | — |
| 63.81.63.144 | — | — |
| 63.81.63.145 | 4.xe-8-1-5-0.GW8.LAX7.ALTER.NET | — |
| 63.81.63.146 | Internet-gw.customer.alter.net | — |
| 63.81.63.147 | — | — |
| 63.81.63.148 | — | — |
| 63.81.63.149 | 827.ATM1-0.GW2.RIC2.ALTER.NET | — |
| 63.81.63.150 | adp-richmondVA-gw.customer.alter.net | — |
| 63.81.63.151 | — | — |
| 63.81.63.152 | — | — |
| 63.81.63.153 | 131.xe-1-1-1.GW12.HOU7.ALTER.NET | — |
| 63.81.63.154 | Internet-gw.customer.alter.net | — |
| 63.81.63.155 | — | — |
| 63.81.63.156 | — | — |
| 63.81.63.157 | Serial1-2.GW3.TCO1.ALTER.NET | — |
| 63.81.63.158 | fbr-gw.customer.alter.net | — |
| 63.81.63.159 | — | — |
| 63.81.63.160 | — | — |
| 63.81.63.161 | 285.xe-0-1-0.GW3.ORL4.ALTER.NET | — |
| 63.81.63.162 | Internet-gw.customer.alter.net | — |
| 63.81.63.163 | — | — |
| 63.81.63.164 | — | — |
| 63.81.63.165 | 592.ATM1-0.GW1.RIC2.ALTER.NET | — |
| 63.81.63.166 | adp-suffolk-gw.customer.alter.net | — |
| 63.81.63.167 | — | — |
| 63.81.63.168 | — | — |
| 63.81.63.169 | ALTER.NET | — |
| 63.81.63.170 | customer.alter.net | — |
| 63.81.63.171 | — | — |
| 63.81.63.172 | — | — |
| 63.81.63.173 | — | — |
| 63.81.63.174 | — | — |
| 63.81.63.175 | — | — |
| 63.81.63.176 | — | — |
| 63.81.63.177 | 98.xe-1-0-1-1.GW14.PHL6.ALTER.NET | — |
| 63.81.63.178 | nitelusa-gw.customer.alter.net | — |
| 63.81.63.179 | — | — |
| 63.81.63.180 | — | — |
| 63.81.63.181 | — | — |
| 63.81.63.182 | — | — |
| 63.81.63.183 | — | — |
| 63.81.63.184 | — | — |
| 63.81.63.185 | 116.xe-4-3-0.116.GW2.DCA6.ALTER.NET | — |
| 63.81.63.186 | verizonbusiness-gw.customer.alter.net | — |
| 63.81.63.187 | — | — |
| 63.81.63.188 | — | — |
| 63.81.63.189 | 174.xe-7-1-1.GW1.BOS30.ALTER.NET | — |
| 63.81.63.190 | Internet-gw.customer.alter.net | — |
| 63.81.63.191 | — | — |
| 63.81.63.192 | — | — |
| 63.81.63.193 | 74.xe-0-1-5-0.GW16.NYC1.ALTER.NET | — |
| 63.81.63.194 | Internet-gw.customer.alter.net | — |
| 63.81.63.195 | — | — |
| 63.81.63.196 | — | — |
| 63.81.63.197 | 500.MFR542.GW7.PIT1.ALTER.NET | — |
| 63.81.63.198 | mascaroconstruction-gw.customer.alter.net | — |
| 63.81.63.199 | — | — |
| 63.81.63.200 | — | — |
| 63.81.63.201 | POS5-1.GW3.IAD8.ALTER.NET | — |
| 63.81.63.202 | swisscom-gw.customer.alter.net | — |
| 63.81.63.203 | — | — |
| 63.81.63.204 | — | — |
| 63.81.63.205 | 126.ATM1-0.GW1.RIC2.ALTER.NET | — |
| 63.81.63.206 | adp-richmondjeep-gw.customer.alter.net | — |
| 63.81.63.207 | — | — |
| 63.81.63.208 | — | — |
| 63.81.63.209 | ALTER.NET | — |
| 63.81.63.210 | customer.alter.net | — |
| 63.81.63.211 | — | — |
| 63.81.63.212 | — | — |
| 63.81.63.213 | ALTER.NET | — |
| 63.81.63.214 | customer.alter.net | — |
| 63.81.63.215 | — | — |
| 63.81.63.216 | — | — |
| 63.81.63.217 | ALTER.NET | — |
| 63.81.63.218 | customer.alter.net | — |
| 63.81.63.219 | — | — |
| 63.81.63.220 | — | — |
| 63.81.63.221 | ALTER.NET | — |
| 63.81.63.222 | customer.alter.net | — |
| 63.81.63.223 | — | — |
| 63.81.63.224 | — | — |
| 63.81.63.225 | ALTER.NET | — |
| 63.81.63.226 | customer.alter.net | — |
| 63.81.63.227 | — | — |
| 63.81.63.228 | — | — |
| 63.81.63.229 | ALTER.NET | — |
| 63.81.63.230 | customer.alter.net | — |
| 63.81.63.231 | — | — |
| 63.81.63.232 | — | — |
| 63.81.63.233 | ALTER.NET | — |
| 63.81.63.234 | customer.alter.net | — |
| 63.81.63.235 | — | — |
| 63.81.63.236 | — | — |
| 63.81.63.237 | ALTER.NET | — |
| 63.81.63.238 | customer.alter.net | — |
| 63.81.63.239 | — | — |
| 63.81.63.240 | — | — |
| 63.81.63.241 | ps176.ALTER.NET | — |
| 63.81.63.242 | Internet-gw.customer.alter.net | — |
| 63.81.63.243 | — | — |
| 63.81.63.244 | — | — |
| 63.81.63.245 | 200.GigabitEthernet3-1.GW3.RIC2.ALTER.NET | — |
| 63.81.63.246 | cova-NorthopGrummanII-gw.customer.alter.net | — |
| 63.81.63.247 | — | — |
| 63.81.63.248 | — | — |
| 63.81.63.249 | PW-Ether152.ALTER.NET | — |
| 63.81.63.250 | Internet-gw.customer.alter.net | — |
| 63.81.63.251 | — | — |
| 63.81.63.252 | — | — |
| 63.81.63.253 | 82.ATM0-1.GW8.DCA6.ALTER.NET | — |
| 63.81.63.254 | columbiasussex-gw.customer.alter.net | — |
| 63.81.63.255 | — | — |