Summary
| ASN | AS91 Rensselaer Polytechnic Institute |
| BGP | 129.161.0.0/16 |
| IPs with RDNS | 242 |
| Hosted Domains | 0 |
| Pingable IPs | 0 |
| Router IPs | 0 |
| 129.161.41.0 | — | 0 |  | |
| 129.161.41.1 | — | 0 | | |
| 129.161.41.2 | — | 0 | | |
| 129.161.41.3 | — | 0 | | |
| 129.161.41.4 | — | 0 | | |
| 129.161.41.5 | — | 0 | | |
| 129.161.41.6 | — | 0 | | |
| 129.161.41.7 | — | 0 | | |
| 129.161.41.8 | — | 0 | | |
| 129.161.41.9 | — | 0 | | |
| 129.161.41.10 | 129-161-41-10.dynamic2.rpi.edu | 0 | | |
| 129.161.41.11 | 129-161-41-11.dynamic2.rpi.edu | 0 | | |
| 129.161.41.12 | 129-161-41-12.dynamic2.rpi.edu | 0 | | |
| 129.161.41.13 | 129-161-41-13.dynamic2.rpi.edu | 0 | | |
| 129.161.41.14 | 129-161-41-14.dynamic2.rpi.edu | 0 | | |
| 129.161.41.15 | 129-161-41-15.dynamic2.rpi.edu | 0 | | |
| 129.161.41.16 | 129-161-41-16.dynamic2.rpi.edu | 0 | | |
| 129.161.41.17 | 129-161-41-17.dynamic2.rpi.edu | 0 | | |
| 129.161.41.18 | 129-161-41-18.dynamic2.rpi.edu | 0 | | |
| 129.161.41.19 | 129-161-41-19.dynamic2.rpi.edu | 0 | | |
| 129.161.41.20 | 129-161-41-20.dynamic2.rpi.edu | 0 | | |
| 129.161.41.21 | 129-161-41-21.dynamic2.rpi.edu | 0 | | |
| 129.161.41.22 | 129-161-41-22.dynamic2.rpi.edu | 0 | | |
| 129.161.41.23 | 129-161-41-23.dynamic2.rpi.edu | 0 | | |
| 129.161.41.24 | 129-161-41-24.dynamic2.rpi.edu | 0 | | |
| 129.161.41.25 | 129-161-41-25.dynamic2.rpi.edu | 0 | | |
| 129.161.41.26 | 129-161-41-26.dynamic2.rpi.edu | 0 | | |
| 129.161.41.27 | 129-161-41-27.dynamic2.rpi.edu | 0 | | |
| 129.161.41.28 | 129-161-41-28.dynamic2.rpi.edu | 0 | | |
| 129.161.41.29 | 129-161-41-29.dynamic2.rpi.edu | 0 | | |
| 129.161.41.30 | 129-161-41-30.dynamic2.rpi.edu | 0 | | |
| 129.161.41.31 | 129-161-41-31.dynamic2.rpi.edu | 0 | | |
| 129.161.41.32 | 129-161-41-32.dynamic2.rpi.edu | 0 | | |
| 129.161.41.33 | 129-161-41-33.dynamic2.rpi.edu | 0 | | |
| 129.161.41.34 | 129-161-41-34.dynamic2.rpi.edu | 0 | | |
| 129.161.41.35 | 129-161-41-35.dynamic2.rpi.edu | 0 | | |
| 129.161.41.36 | 129-161-41-36.dynamic2.rpi.edu | 0 | | |
| 129.161.41.37 | 129-161-41-37.dynamic2.rpi.edu | 0 | | |
| 129.161.41.38 | 129-161-41-38.dynamic2.rpi.edu | 0 | | |
| 129.161.41.39 | 129-161-41-39.dynamic2.rpi.edu | 0 | | |
| 129.161.41.40 | 129-161-41-40.dynamic2.rpi.edu | 0 | | |
| 129.161.41.41 | 129-161-41-41.dynamic2.rpi.edu | 0 | | |
| 129.161.41.42 | 129-161-41-42.dynamic2.rpi.edu | 0 | | |
| 129.161.41.43 | 129-161-41-43.dynamic2.rpi.edu | 0 | | |
| 129.161.41.44 | 129-161-41-44.dynamic2.rpi.edu | 0 | | |
| 129.161.41.45 | 129-161-41-45.dynamic2.rpi.edu | 0 | | |
| 129.161.41.46 | 129-161-41-46.dynamic2.rpi.edu | 0 | | |
| 129.161.41.47 | 129-161-41-47.dynamic2.rpi.edu | 0 | | |
| 129.161.41.48 | 129-161-41-48.dynamic2.rpi.edu | 0 | | |
| 129.161.41.49 | 129-161-41-49.dynamic2.rpi.edu | 0 | | |
| 129.161.41.50 | 129-161-41-50.dynamic2.rpi.edu | 0 | | |
| 129.161.41.51 | 129-161-41-51.dynamic2.rpi.edu | 0 | | |
| 129.161.41.52 | 129-161-41-52.dynamic2.rpi.edu | 0 | | |
| 129.161.41.53 | 129-161-41-53.dynamic2.rpi.edu | 0 | | |
| 129.161.41.54 | 129-161-41-54.dynamic2.rpi.edu | 0 | | |
| 129.161.41.55 | 129-161-41-55.dynamic2.rpi.edu | 0 | | |
| 129.161.41.56 | 129-161-41-56.dynamic2.rpi.edu | 0 | | |
| 129.161.41.57 | 129-161-41-57.dynamic2.rpi.edu | 0 | | |
| 129.161.41.58 | 129-161-41-58.dynamic2.rpi.edu | 0 | | |
| 129.161.41.59 | 129-161-41-59.dynamic2.rpi.edu | 0 | | |
| 129.161.41.60 | 129-161-41-60.dynamic2.rpi.edu | 0 | | |
| 129.161.41.61 | 129-161-41-61.dynamic2.rpi.edu | 0 | | |
| 129.161.41.62 | 129-161-41-62.dynamic2.rpi.edu | 0 | | |
| 129.161.41.63 | 129-161-41-63.dynamic2.rpi.edu | 0 | | |
| 129.161.41.64 | 129-161-41-64.dynamic2.rpi.edu | 0 | | |
| 129.161.41.65 | 129-161-41-65.dynamic2.rpi.edu | 0 | | |
| 129.161.41.66 | 129-161-41-66.dynamic2.rpi.edu | 0 | | |
| 129.161.41.67 | 129-161-41-67.dynamic2.rpi.edu | 0 | | |
| 129.161.41.68 | 129-161-41-68.dynamic2.rpi.edu | 0 | | |
| 129.161.41.69 | 129-161-41-69.dynamic2.rpi.edu | 0 | | |
| 129.161.41.70 | 129-161-41-70.dynamic2.rpi.edu | 0 | | |
| 129.161.41.71 | 129-161-41-71.dynamic2.rpi.edu | 0 | | |
| 129.161.41.72 | 129-161-41-72.dynamic2.rpi.edu | 0 | | |
| 129.161.41.73 | 129-161-41-73.dynamic2.rpi.edu | 0 | | |
| 129.161.41.74 | 129-161-41-74.dynamic2.rpi.edu | 0 | | |
| 129.161.41.75 | 129-161-41-75.dynamic2.rpi.edu | 0 | | |
| 129.161.41.76 | 129-161-41-76.dynamic2.rpi.edu | 0 | | |
| 129.161.41.77 | 129-161-41-77.dynamic2.rpi.edu | 0 | | |
| 129.161.41.78 | 129-161-41-78.dynamic2.rpi.edu | 0 | | |
| 129.161.41.79 | 129-161-41-79.dynamic2.rpi.edu | 0 | | |
| 129.161.41.80 | 129-161-41-80.dynamic2.rpi.edu | 0 | | |
| 129.161.41.81 | 129-161-41-81.dynamic2.rpi.edu | 0 | | |
| 129.161.41.82 | 129-161-41-82.dynamic2.rpi.edu | 0 | | |
| 129.161.41.83 | 129-161-41-83.dynamic2.rpi.edu | 0 | | |
| 129.161.41.84 | 129-161-41-84.dynamic2.rpi.edu | 0 | | |
| 129.161.41.85 | 129-161-41-85.dynamic2.rpi.edu | 0 | | |
| 129.161.41.86 | 129-161-41-86.dynamic2.rpi.edu | 0 | | |
| 129.161.41.87 | 129-161-41-87.dynamic2.rpi.edu | 0 | | |
| 129.161.41.88 | 129-161-41-88.dynamic2.rpi.edu | 0 | | |
| 129.161.41.89 | 129-161-41-89.dynamic2.rpi.edu | 0 | | |
| 129.161.41.90 | 129-161-41-90.dynamic2.rpi.edu | 0 | | |
| 129.161.41.91 | 129-161-41-91.dynamic2.rpi.edu | 0 | | |
| 129.161.41.92 | 129-161-41-92.dynamic2.rpi.edu | 0 | | |
| 129.161.41.93 | 129-161-41-93.dynamic2.rpi.edu | 0 | | |
| 129.161.41.94 | 129-161-41-94.dynamic2.rpi.edu | 0 | | |
| 129.161.41.95 | 129-161-41-95.dynamic2.rpi.edu | 0 | | |
| 129.161.41.96 | 129-161-41-96.dynamic2.rpi.edu | 0 | | |
| 129.161.41.97 | 129-161-41-97.dynamic2.rpi.edu | 0 | | |
| 129.161.41.98 | 129-161-41-98.dynamic2.rpi.edu | 0 | | |
| 129.161.41.99 | 129-161-41-99.dynamic2.rpi.edu | 0 | | |
| 129.161.41.100 | 129-161-41-100.dynamic2.rpi.edu | 0 | | |
| 129.161.41.101 | 129-161-41-101.dynamic2.rpi.edu | 0 | | |
| 129.161.41.102 | 129-161-41-102.dynamic2.rpi.edu | 0 | | |
| 129.161.41.103 | 129-161-41-103.dynamic2.rpi.edu | 0 | | |
| 129.161.41.104 | 129-161-41-104.dynamic2.rpi.edu | 0 | | |
| 129.161.41.105 | 129-161-41-105.dynamic2.rpi.edu | 0 | | |
| 129.161.41.106 | 129-161-41-106.dynamic2.rpi.edu | 0 | | |
| 129.161.41.107 | 129-161-41-107.dynamic2.rpi.edu | 0 | | |
| 129.161.41.108 | 129-161-41-108.dynamic2.rpi.edu | 0 | | |
| 129.161.41.109 | 129-161-41-109.dynamic2.rpi.edu | 0 | | |
| 129.161.41.110 | 129-161-41-110.dynamic2.rpi.edu | 0 | | |
| 129.161.41.111 | 129-161-41-111.dynamic2.rpi.edu | 0 | | |
| 129.161.41.112 | 129-161-41-112.dynamic2.rpi.edu | 0 | | |
| 129.161.41.113 | 129-161-41-113.dynamic2.rpi.edu | 0 | | |
| 129.161.41.114 | 129-161-41-114.dynamic2.rpi.edu | 0 | | |
| 129.161.41.115 | 129-161-41-115.dynamic2.rpi.edu | 0 | | |
| 129.161.41.116 | 129-161-41-116.dynamic2.rpi.edu | 0 | | |
| 129.161.41.117 | 129-161-41-117.dynamic2.rpi.edu | 0 | | |
| 129.161.41.118 | 129-161-41-118.dynamic2.rpi.edu | 0 | | |
| 129.161.41.119 | 129-161-41-119.dynamic2.rpi.edu | 0 | | |
| 129.161.41.120 | 129-161-41-120.dynamic2.rpi.edu | 0 | | |
| 129.161.41.121 | 129-161-41-121.dynamic2.rpi.edu | 0 | | |
| 129.161.41.122 | 129-161-41-122.dynamic2.rpi.edu | 0 | | |
| 129.161.41.123 | 129-161-41-123.dynamic2.rpi.edu | 0 | | |
| 129.161.41.124 | 129-161-41-124.dynamic2.rpi.edu | 0 | | |
| 129.161.41.125 | 129-161-41-125.dynamic2.rpi.edu | 0 | | |
| 129.161.41.126 | 129-161-41-126.dynamic2.rpi.edu | 0 | | |
| 129.161.41.127 | 129-161-41-127.dynamic2.rpi.edu | 0 | | |
| 129.161.41.128 | 129-161-41-128.dynamic2.rpi.edu | 0 | | |
| 129.161.41.129 | 129-161-41-129.dynamic2.rpi.edu | 0 | | |
| 129.161.41.130 | 129-161-41-130.dynamic2.rpi.edu | 0 | | |
| 129.161.41.131 | 129-161-41-131.dynamic2.rpi.edu | 0 | | |
| 129.161.41.132 | 129-161-41-132.dynamic2.rpi.edu | 0 | | |
| 129.161.41.133 | 129-161-41-133.dynamic2.rpi.edu | 0 | | |
| 129.161.41.134 | 129-161-41-134.dynamic2.rpi.edu | 0 | | |
| 129.161.41.135 | 129-161-41-135.dynamic2.rpi.edu | 0 | | |
| 129.161.41.136 | 129-161-41-136.dynamic2.rpi.edu | 0 | | |
| 129.161.41.137 | 129-161-41-137.dynamic2.rpi.edu | 0 | | |
| 129.161.41.138 | 129-161-41-138.dynamic2.rpi.edu | 0 | | |
| 129.161.41.139 | 129-161-41-139.dynamic2.rpi.edu | 0 | | |
| 129.161.41.140 | 129-161-41-140.dynamic2.rpi.edu | 0 | | |
| 129.161.41.141 | 129-161-41-141.dynamic2.rpi.edu | 0 | | |
| 129.161.41.142 | 129-161-41-142.dynamic2.rpi.edu | 0 | | |
| 129.161.41.143 | 129-161-41-143.dynamic2.rpi.edu | 0 | | |
| 129.161.41.144 | 129-161-41-144.dynamic2.rpi.edu | 0 | | |
| 129.161.41.145 | 129-161-41-145.dynamic2.rpi.edu | 0 | | |
| 129.161.41.146 | 129-161-41-146.dynamic2.rpi.edu | 0 | | |
| 129.161.41.147 | 129-161-41-147.dynamic2.rpi.edu | 0 | | |
| 129.161.41.148 | 129-161-41-148.dynamic2.rpi.edu | 0 | | |
| 129.161.41.149 | 129-161-41-149.dynamic2.rpi.edu | 0 | | |
| 129.161.41.150 | 129-161-41-150.dynamic2.rpi.edu | 0 | | |
| 129.161.41.151 | 129-161-41-151.dynamic2.rpi.edu | 0 | | |
| 129.161.41.152 | 129-161-41-152.dynamic2.rpi.edu | 0 | | |
| 129.161.41.153 | 129-161-41-153.dynamic2.rpi.edu | 0 | | |
| 129.161.41.154 | 129-161-41-154.dynamic2.rpi.edu | 0 | | |
| 129.161.41.155 | 129-161-41-155.dynamic2.rpi.edu | 0 | | |
| 129.161.41.156 | 129-161-41-156.dynamic2.rpi.edu | 0 | | |
| 129.161.41.157 | 129-161-41-157.dynamic2.rpi.edu | 0 | | |
| 129.161.41.158 | 129-161-41-158.dynamic2.rpi.edu | 0 | | |
| 129.161.41.159 | 129-161-41-159.dynamic2.rpi.edu | 0 | | |
| 129.161.41.160 | 129-161-41-160.dynamic2.rpi.edu | 0 | | |
| 129.161.41.161 | 129-161-41-161.dynamic2.rpi.edu | 0 | | |
| 129.161.41.162 | 129-161-41-162.dynamic2.rpi.edu | 0 | | |
| 129.161.41.163 | 129-161-41-163.dynamic2.rpi.edu | 0 | | |
| 129.161.41.164 | 129-161-41-164.dynamic2.rpi.edu | 0 | | |
| 129.161.41.165 | 129-161-41-165.dynamic2.rpi.edu | 0 | | |
| 129.161.41.166 | 129-161-41-166.dynamic2.rpi.edu | 0 | | |
| 129.161.41.167 | 129-161-41-167.dynamic2.rpi.edu | 0 | | |
| 129.161.41.168 | 129-161-41-168.dynamic2.rpi.edu | 0 | | |
| 129.161.41.169 | 129-161-41-169.dynamic2.rpi.edu | 0 | | |
| 129.161.41.170 | 129-161-41-170.dynamic2.rpi.edu | 0 | | |
| 129.161.41.171 | 129-161-41-171.dynamic2.rpi.edu | 0 | | |
| 129.161.41.172 | 129-161-41-172.dynamic2.rpi.edu | 0 | | |
| 129.161.41.173 | 129-161-41-173.dynamic2.rpi.edu | 0 | | |
| 129.161.41.174 | 129-161-41-174.dynamic2.rpi.edu | 0 | | |
| 129.161.41.175 | 129-161-41-175.dynamic2.rpi.edu | 0 | | |
| 129.161.41.176 | 129-161-41-176.dynamic2.rpi.edu | 0 | | |
| 129.161.41.177 | 129-161-41-177.dynamic2.rpi.edu | 0 | | |
| 129.161.41.178 | 129-161-41-178.dynamic2.rpi.edu | 0 | | |
| 129.161.41.179 | 129-161-41-179.dynamic2.rpi.edu | 0 | | |
| 129.161.41.180 | 129-161-41-180.dynamic2.rpi.edu | 0 | | |
| 129.161.41.181 | 129-161-41-181.dynamic2.rpi.edu | 0 | | |
| 129.161.41.182 | 129-161-41-182.dynamic2.rpi.edu | 0 | | |
| 129.161.41.183 | 129-161-41-183.dynamic2.rpi.edu | 0 | | |
| 129.161.41.184 | 129-161-41-184.dynamic2.rpi.edu | 0 | | |
| 129.161.41.185 | 129-161-41-185.dynamic2.rpi.edu | 0 | | |
| 129.161.41.186 | 129-161-41-186.dynamic2.rpi.edu | 0 | | |
| 129.161.41.187 | 129-161-41-187.dynamic2.rpi.edu | 0 | | |
| 129.161.41.188 | 129-161-41-188.dynamic2.rpi.edu | 0 | | |
| 129.161.41.189 | 129-161-41-189.dynamic2.rpi.edu | 0 | | |
| 129.161.41.190 | 129-161-41-190.dynamic2.rpi.edu | 0 | | |
| 129.161.41.191 | 129-161-41-191.dynamic2.rpi.edu | 0 | | |
| 129.161.41.192 | 129-161-41-192.dynamic2.rpi.edu | 0 | | |
| 129.161.41.193 | 129-161-41-193.dynamic2.rpi.edu | 0 | | |
| 129.161.41.194 | 129-161-41-194.dynamic2.rpi.edu | 0 | | |
| 129.161.41.195 | 129-161-41-195.dynamic2.rpi.edu | 0 | | |
| 129.161.41.196 | 129-161-41-196.dynamic2.rpi.edu | 0 | | |
| 129.161.41.197 | 129-161-41-197.dynamic2.rpi.edu | 0 | | |
| 129.161.41.198 | 129-161-41-198.dynamic2.rpi.edu | 0 | | |
| 129.161.41.199 | 129-161-41-199.dynamic2.rpi.edu | 0 | | |
| 129.161.41.200 | 129-161-41-200.dynamic2.rpi.edu | 0 | | |
| 129.161.41.201 | 129-161-41-201.dynamic2.rpi.edu | 0 | | |
| 129.161.41.202 | 129-161-41-202.dynamic2.rpi.edu | 0 | | |
| 129.161.41.203 | 129-161-41-203.dynamic2.rpi.edu | 0 | | |
| 129.161.41.204 | 129-161-41-204.dynamic2.rpi.edu | 0 | | |
| 129.161.41.205 | 129-161-41-205.dynamic2.rpi.edu | 0 | | |
| 129.161.41.206 | 129-161-41-206.dynamic2.rpi.edu | 0 | | |
| 129.161.41.207 | 129-161-41-207.dynamic2.rpi.edu | 0 | | |
| 129.161.41.208 | 129-161-41-208.dynamic2.rpi.edu | 0 | | |
| 129.161.41.209 | 129-161-41-209.dynamic2.rpi.edu | 0 | | |
| 129.161.41.210 | 129-161-41-210.dynamic2.rpi.edu | 0 | | |
| 129.161.41.211 | 129-161-41-211.dynamic2.rpi.edu | 0 | | |
| 129.161.41.212 | 129-161-41-212.dynamic2.rpi.edu | 0 | | |
| 129.161.41.213 | 129-161-41-213.dynamic2.rpi.edu | 0 | | |
| 129.161.41.214 | 129-161-41-214.dynamic2.rpi.edu | 0 | | |
| 129.161.41.215 | 129-161-41-215.dynamic2.rpi.edu | 0 | | |
| 129.161.41.216 | 129-161-41-216.dynamic2.rpi.edu | 0 | | |
| 129.161.41.217 | 129-161-41-217.dynamic2.rpi.edu | 0 | | |
| 129.161.41.218 | 129-161-41-218.dynamic2.rpi.edu | 0 | | |
| 129.161.41.219 | 129-161-41-219.dynamic2.rpi.edu | 0 | | |
| 129.161.41.220 | 129-161-41-220.dynamic2.rpi.edu | 0 | | |
| 129.161.41.221 | 129-161-41-221.dynamic2.rpi.edu | 0 | | |
| 129.161.41.222 | 129-161-41-222.dynamic2.rpi.edu | 0 | | |
| 129.161.41.223 | 129-161-41-223.dynamic2.rpi.edu | 0 | | |
| 129.161.41.224 | 129-161-41-224.dynamic2.rpi.edu | 0 | | |
| 129.161.41.225 | 129-161-41-225.dynamic2.rpi.edu | 0 | | |
| 129.161.41.226 | 129-161-41-226.dynamic2.rpi.edu | 0 | | |
| 129.161.41.227 | 129-161-41-227.dynamic2.rpi.edu | 0 | | |
| 129.161.41.228 | 129-161-41-228.dynamic2.rpi.edu | 0 | | |
| 129.161.41.229 | 129-161-41-229.dynamic2.rpi.edu | 0 | | |
| 129.161.41.230 | 129-161-41-230.dynamic2.rpi.edu | 0 | | |
| 129.161.41.231 | 129-161-41-231.dynamic2.rpi.edu | 0 | | |
| 129.161.41.232 | 129-161-41-232.dynamic2.rpi.edu | 0 | | |
| 129.161.41.233 | 129-161-41-233.dynamic2.rpi.edu | 0 | | |
| 129.161.41.234 | 129-161-41-234.dynamic2.rpi.edu | 0 | | |
| 129.161.41.235 | 129-161-41-235.dynamic2.rpi.edu | 0 | | |
| 129.161.41.236 | 129-161-41-236.dynamic2.rpi.edu | 0 | | |
| 129.161.41.237 | 129-161-41-237.dynamic2.rpi.edu | 0 | | |
| 129.161.41.238 | 129-161-41-238.dynamic2.rpi.edu | 0 | | |
| 129.161.41.239 | 129-161-41-239.dynamic2.rpi.edu | 0 | | |
| 129.161.41.240 | 129-161-41-240.dynamic2.rpi.edu | 0 | | |
| 129.161.41.241 | 129-161-41-241.dynamic2.rpi.edu | 0 | | |
| 129.161.41.242 | 129-161-41-242.dynamic2.rpi.edu | 0 | | |
| 129.161.41.243 | 129-161-41-243.dynamic2.rpi.edu | 0 | | |
| 129.161.41.244 | 129-161-41-244.dynamic2.rpi.edu | 0 | | |
| 129.161.41.245 | 129-161-41-245.dynamic2.rpi.edu | 0 | | |
| 129.161.41.246 | 129-161-41-246.dynamic2.rpi.edu | 0 | | |
| 129.161.41.247 | 129-161-41-247.dynamic2.rpi.edu | 0 | | |
| 129.161.41.248 | 129-161-41-248.dynamic2.rpi.edu | 0 | | |
| 129.161.41.249 | — | 0 | | |
| 129.161.41.250 | — | 0 | | |
| 129.161.41.251 | — | 0 | | |
| 129.161.41.252 | vccwlctrl12-129-161-40.net.rpi.edu | 0 | | |
| 129.161.41.253 | vccwlctrl13-129-161-40.net.rpi.edu | 0 | | |
| 129.161.41.254 | vccfr13-129-161-40.net.rpi.edu | 0 | | |
| 129.161.41.255 | — | 0 | | |
Traceroute
Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.
$
traceroute -a -n -q1 -f3 -m6 129.161.41.253
traceroute to 129.161.41.253 (129.161.41.253): 6 hops max, 52 byte packets
4 *
5 *
6 *
Measurement taken from 
IPinfo ProbeNet in Zhongwei, CN
IPinfo ProbeNet in Zhongwei, CNOn