User Agent String.Com 

User Agent String explained :

Gigabot 3.0
Gigabot	Name : Gigabot
3.0	Gigabot version
http://www.gigablast.com/spider.html	URL
Description:	Gigablast's indexing agent
Last visit:	2012.02.11 11:27
IP address and host name	134.243.65.23 - 134.243.65.23 151.188.18.82 - 151.188.18.82 190.84.245.77 - Static-IP-cr1908424577.cable.net.co 193.158.178.224 - pC19EB2E0.dip.t-dialin.net 194.242.226.54 - www.santegidio.org 38.114.104.116 - 0 64.20.55.86 - 64.20.55.86 64.22.106.82 - 64.22.106.82 65.111.171.90 - 90-171-111-65.serverpronto.com 66.230.232.19 - mail.macrobright.com 66.231.188.140 - 66.231.188.140 66.231.188.154 - 66.231.188.154 66.231.189.56 - 66.231.189.56 66.45.228.48 - slice2.interserver.net 67.16.94.2 - 67.16.94.2 78.58.168.128 - 78-58-168-128.static.zebra.lt 84.187.66.61 - p54BB423D.dip.t-dialin.net 84.58.248.129 - dslb-084-058-248-129.pools.arcor-ip.net 92.224.63.246 - g224063246.adsl.alicedsl.de 96.252.134.223 - pool-96-252-134-223.tampfl.fios.verizon.net
All Gigabot user agent strings