Summary
| ASN | AS39790 Web4U s.r.o. |
| BGP | 81.91.80.0/21 |
| IPs with RDNS | 256 |
| Hosted Domains | 0 |
| Pingable IPs | 41 |
| Router IPs | 0 |
| 81.91.83.0 | web4u-net-81-91-83-0.web4u.cz | 0 |  | |
| 81.91.83.1 | gw-83-1.r4.web4u.cz | 0 | Ping | |
| 81.91.83.2 | unassigned-81-91-83-2.web4u.cz | 0 | | |
| 81.91.83.3 | unassigned-81-91-83-3.web4u.cz | 0 | | |
| 81.91.83.4 | java1.brainking.com | 0 | | |
| 81.91.83.5 | static.brainking.com | 0 | | |
| 81.91.83.6 | web.brainking.com | 0 | Ping | |
| 81.91.83.7 | d289.server4u.cz | 0 | Ping | |
| 81.91.83.8 | ns2.dnsking.cz | 0 | Ping | |
| 81.91.83.9 | j1.brainking.com | 0 | Ping | |
| 81.91.83.10 | unassigned-81-91-83-10.web4u.cz | 0 | | |
| 81.91.83.11 | unassigned-81-91-83-11.web4u.cz | 0 | | |
| 81.91.83.12 | m189.server4u.cz | 0 | Ping | |
| 81.91.83.13 | unassigned-81-91-83-13.web4u.cz | 0 | | |
| 81.91.83.14 | unassigned-81-91-83-14.web4u.cz | 0 | | |
| 81.91.83.15 | unassigned-81-91-83-15.web4u.cz | 0 | | |
| 81.91.83.16 | unassigned-81-91-83-16.web4u.cz | 0 | | |
| 81.91.83.17 | unassigned-81-91-83-17.web4u.cz | 0 | | |
| 81.91.83.18 | unassigned-81-91-83-18.web4u.cz | 0 | | |
| 81.91.83.19 | unassigned-81-91-83-19.web4u.cz | 0 | | |
| 81.91.83.20 | unassigned-81-91-83-20.web4u.cz | 0 | | |
| 81.91.83.21 | z175.server4u.cz | 0 | Ping | |
| 81.91.83.22 | unassigned-81-91-83-22.web4u.cz | 0 | | |
| 81.91.83.23 | unassigned-81-91-83-23.web4u.cz | 0 | | |
| 81.91.83.24 | unassigned-81-91-83-24.web4u.cz | 0 | | |
| 81.91.83.25 | unassigned-81-91-83-25.web4u.cz | 0 | | |
| 81.91.83.26 | unassigned-81-91-83-26.web4u.cz | 0 | | |
| 81.91.83.27 | unassigned-81-91-83-27.web4u.cz | 0 | | |
| 81.91.83.28 | unassigned-81-91-83-28.web4u.cz | 0 | | |
| 81.91.83.29 | unassigned-81-91-83-29.web4u.cz | 0 | | |
| 81.91.83.30 | unassigned-81-91-83-30.web4u.cz | 0 | | |
| 81.91.83.31 | d309.server4u.cz | 0 | Ping | |
| 81.91.83.32 | d309.server4u.cz | 0 | Ping | |
| 81.91.83.33 | vs486.server4u.cz | 0 | Ping | |
| 81.91.83.34 | vs486.server4u.cz | 0 | Ping | |
| 81.91.83.35 | vs486.server4u.cz | 0 | Ping | |
| 81.91.83.36 | vs486.server4u.cz | 0 | Ping | |
| 81.91.83.37 | vs487.server4u.cz | 0 | Ping | |
| 81.91.83.38 | vstest100.server4u.cz | 0 | | |
| 81.91.83.39 | vstest101.server4u.cz | 0 | | |
| 81.91.83.40 | vstest102.server4u.cz | 0 | | |
| 81.91.83.41 | vstest103.server4u.cz | 0 | | |
| 81.91.83.42 | vstest104.server4u.cz | 0 | | |
| 81.91.83.43 | vstest105.server4u.cz | 0 | | |
| 81.91.83.44 | vstest106.server4u.cz | 0 | | |
| 81.91.83.45 | vstest107.server4u.cz | 0 | | |
| 81.91.83.46 | vstest108.server4u.cz | 0 | | |
| 81.91.83.47 | vstest109.server4u.cz | 0 | | |
| 81.91.83.48 | vstest110.server4u.cz | 0 | | |
| 81.91.83.49 | vstest111.server4u.cz | 0 | | |
| 81.91.83.50 | vs494.server4u.cz | 0 | Ping | |
| 81.91.83.51 | unassigned-81-91-83-51.web4u.cz | 0 | | |
| 81.91.83.52 | unassigned-81-91-83-52.web4u.cz | 0 | | |
| 81.91.83.53 | unassigned-81-91-83-53.web4u.cz | 0 | | |
| 81.91.83.54 | unassigned-81-91-83-54.web4u.cz | 0 | | |
| 81.91.83.55 | unassigned-81-91-83-55.web4u.cz | 0 | | |
| 81.91.83.56 | unassigned-81-91-83-56.web4u.cz | 0 | | |
| 81.91.83.57 | unassigned-81-91-83-57.web4u.cz | 0 | | |
| 81.91.83.58 | unassigned-81-91-83-58.web4u.cz | 0 | | |
| 81.91.83.59 | unassigned-81-91-83-59.web4u.cz | 0 | | |
| 81.91.83.60 | unassigned-81-91-83-60.web4u.cz | 0 | | |
| 81.91.83.61 | unassigned-81-91-83-61.web4u.cz | 0 | | |
| 81.91.83.62 | unassigned-81-91-83-62.web4u.cz | 0 | | |
| 81.91.83.63 | unassigned-81-91-83-63.web4u.cz | 0 | | |
| 81.91.83.64 | unassigned-81-91-83-64.web4u.cz | 0 | | |
| 81.91.83.65 | unassigned-81-91-83-65.web4u.cz | 0 | | |
| 81.91.83.66 | unassigned-81-91-83-66.web4u.cz | 0 | | |
| 81.91.83.67 | unassigned-81-91-83-67.web4u.cz | 0 | | |
| 81.91.83.68 | unassigned-81-91-83-68.web4u.cz | 0 | | |
| 81.91.83.69 | unassigned-81-91-83-69.web4u.cz | 0 | | |
| 81.91.83.70 | unassigned-81-91-83-70.web4u.cz | 0 | | |
| 81.91.83.71 | unassigned-81-91-83-71.web4u.cz | 0 | | |
| 81.91.83.72 | unassigned-81-91-83-72.web4u.cz | 0 | | |
| 81.91.83.73 | unassigned-81-91-83-73.web4u.cz | 0 | | |
| 81.91.83.74 | unassigned-81-91-83-74.web4u.cz | 0 | | |
| 81.91.83.75 | unassigned-81-91-83-75.web4u.cz | 0 | | |
| 81.91.83.76 | unassigned-81-91-83-76.web4u.cz | 0 | | |
| 81.91.83.77 | unassigned-81-91-83-77.web4u.cz | 0 | | |
| 81.91.83.78 | unassigned-81-91-83-78.web4u.cz | 0 | | |
| 81.91.83.79 | unassigned-81-91-83-79.web4u.cz | 0 | | |
| 81.91.83.80 | tmpvstest100.server4u.cz | 0 | | |
| 81.91.83.81 | vs508.server4u.cz | 0 | Ping | |
| 81.91.83.82 | px200.server4u.cz | 0 | | |
| 81.91.83.83 | unassigned-81-91-83-83.web4u.cz | 0 | | |
| 81.91.83.84 | vstest112.server4u.cz | 0 | | |
| 81.91.83.85 | vstest113.server4u.cz | 0 | | |
| 81.91.83.86 | vstest114.server4u.cz | 0 | | |
| 81.91.83.87 | vstest115.server4u.cz | 0 | | |
| 81.91.83.88 | vstest116.server4u.cz | 0 | | |
| 81.91.83.89 | vstest117.server4u.cz | 0 | | |
| 81.91.83.90 | vstest118.server4u.cz | 0 | | |
| 81.91.83.91 | vstest119.server4u.cz | 0 | | |
| 81.91.83.92 | vstest120.server4u.cz | 0 | | |
| 81.91.83.93 | vstest121.server4u.cz | 0 | | |
| 81.91.83.94 | vstest122.server4u.cz | 0 | | |
| 81.91.83.95 | vstest123.server4u.cz | 0 | | |
| 81.91.83.96 | vstest124.server4u.cz | 0 | | |
| 81.91.83.97 | vstest125.server4u.cz | 0 | | |
| 81.91.83.98 | vstest126.server4u.cz | 0 | | |
| 81.91.83.99 | vstest127.server4u.cz | 0 | | |
| 81.91.83.100 | vstest128.server4u.cz | 0 | | |
| 81.91.83.101 | vstest129.server4u.cz | 0 | | |
| 81.91.83.102 | vstest130.server4u.cz | 0 | | |
| 81.91.83.103 | vstest131.server4u.cz | 0 | | |
| 81.91.83.104 | vstest132.server4u.cz | 0 | | |
| 81.91.83.105 | vstest133.server4u.cz | 0 | | |
| 81.91.83.106 | unassigned-81-91-83-106.web4u.cz | 0 | | |
| 81.91.83.107 | vs705.server4u.cz | 0 | Ping | |
| 81.91.83.108 | unassigned-81-91-83-108.web4u.cz | 0 | | |
| 81.91.83.109 | m104-5.server4u.cz | 0 | Ping | |
| 81.91.83.110 | unassigned-81-91-83-110.web4u.cz | 0 | | |
| 81.91.83.111 | vs755.server4u.cz | 0 | Ping | |
| 81.91.83.112 | m176-2.server4u.cz | 0 | Ping | |
| 81.91.83.113 | m176-3.server4u.cz | 0 | Ping | |
| 81.91.83.114 | unassigned-81-91-83-114.web4u.cz | 0 | | |
| 81.91.83.115 | unassigned-81-91-83-115.web4u.cz | 0 | | |
| 81.91.83.116 | unassigned-81-91-83-116.web4u.cz | 0 | | |
| 81.91.83.117 | unassigned-81-91-83-117.web4u.cz | 0 | | |
| 81.91.83.118 | unassigned-81-91-83-118.web4u.cz | 0 | | |
| 81.91.83.119 | vstest134.server4u.cz | 0 | | |
| 81.91.83.120 | vstest135.server4u.cz | 0 | | |
| 81.91.83.121 | vstest136.server4u.cz | 0 | | |
| 81.91.83.122 | vstest137.server4u.cz | 0 | | |
| 81.91.83.123 | vstest138.server4u.cz | 0 | | |
| 81.91.83.124 | vstest139.server4u.cz | 0 | | |
| 81.91.83.125 | vstest140.server4u.cz | 0 | | |
| 81.91.83.126 | vstest141.server4u.cz | 0 | | |
| 81.91.83.127 | vstest142.server4u.cz | 0 | | |
| 81.91.83.128 | vstest143.server4u.cz | 0 | | |
| 81.91.83.129 | unassigned-81-91-83-129.web4u.cz | 0 | | |
| 81.91.83.130 | unassigned-81-91-83-130.web4u.cz | 0 | | |
| 81.91.83.131 | unassigned-81-91-83-131.web4u.cz | 0 | | |
| 81.91.83.132 | www.c-baterie.cz | 0 | Ping | |
| 81.91.83.133 | unassigned-81-91-83-133.web4u.cz | 0 | | |
| 81.91.83.134 | m104-2.server4u.cz | 0 | Ping | |
| 81.91.83.135 | unassigned-81-91-83-135.web4u.cz | 0 | | |
| 81.91.83.136 | m104-3.server4u.cz | 0 | Ping | |
| 81.91.83.137 | unassigned-81-91-83-137.web4u.cz | 0 | | |
| 81.91.83.138 | unassigned-81-91-83-138.web4u.cz | 0 | | |
| 81.91.83.139 | smtp.m103.server4u.cz | 0 | Ping | |
| 81.91.83.140 | unassigned-81-91-83-140.web4u.cz | 0 | | |
| 81.91.83.141 | unassigned-81-91-83-141.web4u.cz | 0 | | |
| 81.91.83.142 | unassigned-81-91-83-142.web4u.cz | 0 | | |
| 81.91.83.143 | unassigned-81-91-83-143.web4u.cz | 0 | | |
| 81.91.83.144 | unassigned-81-91-83-144.web4u.cz | 0 | | |
| 81.91.83.145 | unassigned-81-91-83-145.web4u.cz | 0 | | |
| 81.91.83.146 | unassigned-81-91-83-146.web4u.cz | 0 | | |
| 81.91.83.147 | unassigned-81-91-83-147.web4u.cz | 0 | | |
| 81.91.83.148 | unassigned-81-91-83-148.web4u.cz | 0 | | |
| 81.91.83.149 | unassigned-81-91-83-149.web4u.cz | 0 | | |
| 81.91.83.150 | unassigned-81-91-83-150.web4u.cz | 0 | | |
| 81.91.83.151 | unassigned-81-91-83-151.web4u.cz | 0 | | |
| 81.91.83.152 | unassigned-81-91-83-152.web4u.cz | 0 | | |
| 81.91.83.153 | unassigned-81-91-83-153.web4u.cz | 0 | | |
| 81.91.83.154 | unassigned-81-91-83-154.web4u.cz | 0 | | |
| 81.91.83.155 | unassigned-81-91-83-155.web4u.cz | 0 | | |
| 81.91.83.156 | unassigned-81-91-83-156.web4u.cz | 0 | | |
| 81.91.83.157 | unassigned-81-91-83-157.web4u.cz | 0 | | |
| 81.91.83.158 | unassigned-81-91-83-158.web4u.cz | 0 | | |
| 81.91.83.159 | unassigned-81-91-83-159.web4u.cz | 0 | | |
| 81.91.83.160 | unassigned-81-91-83-160.web4u.cz | 0 | | |
| 81.91.83.161 | unassigned-81-91-83-161.web4u.cz | 0 | | |
| 81.91.83.162 | unassigned-81-91-83-162.web4u.cz | 0 | | |
| 81.91.83.163 | unassigned-81-91-83-163.web4u.cz | 0 | | |
| 81.91.83.164 | unassigned-81-91-83-164.web4u.cz | 0 | | |
| 81.91.83.165 | unassigned-81-91-83-165.web4u.cz | 0 | | |
| 81.91.83.166 | unassigned-81-91-83-166.web4u.cz | 0 | | |
| 81.91.83.167 | unassigned-81-91-83-167.web4u.cz | 0 | | |
| 81.91.83.168 | d298.server4u.cz | 0 | Ping | |
| 81.91.83.169 | mail.elnetsystem.cz | 0 | Ping | |
| 81.91.83.170 | vstest144.server4u.cz | 0 | | |
| 81.91.83.171 | vstest145.server4u.cz | 0 | | |
| 81.91.83.172 | vstest146.server4u.cz | 0 | | |
| 81.91.83.173 | vstest147.server4u.cz | 0 | | |
| 81.91.83.174 | vstest148.server4u.cz | 0 | | |
| 81.91.83.175 | vstest149.server4u.cz | 0 | | |
| 81.91.83.176 | vstest150.server4u.cz | 0 | | |
| 81.91.83.177 | vstest151.server4u.cz | 0 | | |
| 81.91.83.178 | vstest152.server4u.cz | 0 | | |
| 81.91.83.179 | vstest153.server4u.cz | 0 | | |
| 81.91.83.180 | vs577.server4u.cz | 0 | Ping | |
| 81.91.83.181 | vsmortal2.server4u.cz | 0 | | |
| 81.91.83.182 | vsmortal2.server4u.cz | 0 | Ping | |
| 81.91.83.183 | vsmortal3.server4u.cz | 0 | | |
| 81.91.83.184 | mail.pkdesign.cz | 0 | Ping | |
| 81.91.83.185 | vsmortal4.server4u.cz | 0 | Ping | |
| 81.91.83.186 | unassigned-81-91-83-186.web4u.cz | 0 | | |
| 81.91.83.187 | unassigned-81-91-83-187.web4u.cz | 0 | | |
| 81.91.83.188 | unassigned-81-91-83-188.web4u.cz | 0 | | |
| 81.91.83.189 | unassigned-81-91-83-189.web4u.cz | 0 | | |
| 81.91.83.190 | unassigned-81-91-83-190.web4u.cz | 0 | | |
| 81.91.83.191 | unassigned-81-91-83-191.web4u.cz | 0 | | |
| 81.91.83.192 | unassigned-81-91-83-192.web4u.cz | 0 | | |
| 81.91.83.193 | unassigned-81-91-83-193.web4u.cz | 0 | | |
| 81.91.83.194 | unassigned-81-91-83-194.web4u.cz | 0 | | |
| 81.91.83.195 | unassigned-81-91-83-195.web4u.cz | 0 | | |
| 81.91.83.196 | unassigned-81-91-83-196.web4u.cz | 0 | | |
| 81.91.83.197 | unassigned-81-91-83-197.web4u.cz | 0 | | |
| 81.91.83.198 | unassigned-81-91-83-198.web4u.cz | 0 | | |
| 81.91.83.199 | unassigned-81-91-83-199.web4u.cz | 0 | | |
| 81.91.83.200 | unassigned-81-91-83-200.web4u.cz | 0 | | |
| 81.91.83.201 | unassigned-81-91-83-201.web4u.cz | 0 | | |
| 81.91.83.202 | unassigned-81-91-83-202.web4u.cz | 0 | | |
| 81.91.83.203 | unassigned-81-91-83-203.web4u.cz | 0 | | |
| 81.91.83.204 | unassigned-81-91-83-204.web4u.cz | 0 | | |
| 81.91.83.205 | unassigned-81-91-83-205.web4u.cz | 0 | | |
| 81.91.83.206 | unassigned-81-91-83-206.web4u.cz | 0 | | |
| 81.91.83.207 | m136-stats.server4u.cz | 0 | Ping | |
| 81.91.83.208 | vstest154.server4u.cz | 0 | | |
| 81.91.83.209 | vstest155.server4u.cz | 0 | | |
| 81.91.83.210 | vstest156.server4u.cz | 0 | | |
| 81.91.83.211 | vstest157.server4u.cz | 0 | | |
| 81.91.83.212 | vstest158.server4u.cz | 0 | | |
| 81.91.83.213 | vstest159.server4u.cz | 0 | | |
| 81.91.83.214 | vstest160.server4u.cz | 0 | | |
| 81.91.83.215 | vstest161.server4u.cz | 0 | | |
| 81.91.83.216 | vstest162.server4u.cz | 0 | | |
| 81.91.83.217 | vstest163.server4u.cz | 0 | | |
| 81.91.83.218 | unassigned-81-91-83-218.web4u.cz | 0 | | |
| 81.91.83.219 | unassigned-81-91-83-219.web4u.cz | 0 | | |
| 81.91.83.220 | unassigned-81-91-83-220.web4u.cz | 0 | | |
| 81.91.83.221 | vs589.server4u.cz | 0 | Ping | |
| 81.91.83.222 | sokordia.com | 0 | Ping | |
| 81.91.83.223 | unassigned-81-91-83-223.web4u.cz | 0 | | |
| 81.91.83.224 | unassigned-81-91-83-224.web4u.cz | 0 | | |
| 81.91.83.225 | unassigned-81-91-83-225.web4u.cz | 0 | | |
| 81.91.83.226 | vs796.server4u.cz | 0 | Ping | |
| 81.91.83.227 | unassigned-81-91-83-227.web4u.cz | 0 | | |
| 81.91.83.228 | smtp.sokordia.cz | 0 | Ping | |
| 81.91.83.229 | vs590.server4u.cz | 0 | | |
| 81.91.83.230 | vs564-new.server4u.cz | 0 | Ping | |
| 81.91.83.231 | unassigned-81-91-83-231.web4u.cz | 0 | | |
| 81.91.83.232 | unassigned-81-91-83-232.web4u.cz | 0 | | |
| 81.91.83.233 | unassigned-81-91-83-233.web4u.cz | 0 | | |
| 81.91.83.234 | unassigned-81-91-83-234.web4u.cz | 0 | | |
| 81.91.83.235 | unassigned-81-91-83-235.web4u.cz | 0 | | |
| 81.91.83.236 | unassigned-81-91-83-236.web4u.cz | 0 | | |
| 81.91.83.237 | unassigned-81-91-83-237.web4u.cz | 0 | | |
| 81.91.83.238 | unassigned-81-91-83-238.web4u.cz | 0 | | |
| 81.91.83.239 | unassigned-81-91-83-239.web4u.cz | 0 | | |
| 81.91.83.240 | unassigned-81-91-83-240.web4u.cz | 0 | | |
| 81.91.83.241 | unassigned-81-91-83-241.web4u.cz | 0 | | |
| 81.91.83.242 | unassigned-81-91-83-242.web4u.cz | 0 | | |
| 81.91.83.243 | unassigned-81-91-83-243.web4u.cz | 0 | | |
| 81.91.83.244 | dev.zlej.net | 0 | Ping | |
| 81.91.83.245 | unassigned-81-91-83-245.web4u.cz | 0 | | |
| 81.91.83.246 | unassigned-81-91-83-246.web4u.cz | 0 | | |
| 81.91.83.247 | unassigned-81-91-83-247.web4u.cz | 0 | | |
| 81.91.83.248 | unassigned-81-91-83-248.web4u.cz | 0 | | |
| 81.91.83.249 | unassigned-81-91-83-249.web4u.cz | 0 | | |
| 81.91.83.250 | unassigned-81-91-83-250.web4u.cz | 0 | | |
| 81.91.83.251 | d309.server4u.cz | 0 | Ping | |
| 81.91.83.252 | unassigned-81-91-83-252.web4u.cz | 0 | | |
| 81.91.83.253 | unassigned-81-91-83-253.web4u.cz | 0 | | |
| 81.91.83.254 | unassigned-81-91-83-254.web4u.cz | 0 | | |
| 81.91.83.255 | brd-81-91-83-255.web4u.cz | 0 | | |
Traceroute
Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.Traceroute →
$ traceroute -a -n -q1 -f4 81.91.83.109
traceroute to 81.91.83.109 (81.91.83.109): 64 hops max, 52 byte packets
5 *
7 *
8 *
Measurement taken from 
IPinfo ProbeNet in Prague, CZ
IPinfo ProbeNet in Prague, CZOn