User Agent String.Com 

User Agent String explained :

ia_archiver 8.1
ia_archiver	Name : ia_archiver
8.1	ia_archiver version
Windows 2000 1.9	Operating System:
en-US	Language Tag, indicates the language for which the client had been localized (e.g. menus and buttons in the user interface) en-US = English - United States
Description:	Alexa Web crawler
First visit:	2011.01.05 02:05
Last visit:	2018.07.28 08:36
IP address and host name	114.255.40.48 - 114.255.40.48 163.172.209.74 - kvm.hypervm.tk 163.172.67.180 - tor-exit-readme.memcpy.io 178.17.173.22 - 178-17-173-22.static.host 185.12.45.79 - ch-zurich.ra4wvpn.com 191.96.249.110 - 191.96.249.110 192.42.116.16 - tor-exit.hartvoorinternetvrijheid.nl 193.90.12.86 - tor-1.multisec.no 212.47.242.127 - 127-242-47-212.rev.cloud.scaleway.com 212.47.253.151 - dylan.exit.torworld.org 51.15.40.233 - cheeki-breeki.oignon.ovh 51.15.46.217 - 217-46-15-51.rev.cloud.scaleway.com 51.15.47.106 - 106-47-15-51.rev.cloud.scaleway.com 51.15.57.167 - zcashtor0nl.zcashtorservers.org 51.254.23.203 - 51.254.23.203 62.210.81.52 - s89-paris.cloud-center.ro 65.19.167.132 - 65.19.167.132 89.221.210.122 - 89.221.210.122 92.27.26.29 - host-92-27-26-29.static.as13285.net
All ia_archiver user agent strings