new hosts appearing between 2012-02-20_0800 and 2012-02-21_0800:
click.uol.com.br                has IPv4 200.147.3.193, 200.147.35.193, 200.221.7.75 has IPv6 2804:49c:319:430::181 (ok)
davidnaylor.co.uk               has IPv4 31.6.77.23 has IPv6 2400:cb00:2048:1::adf5:3d73 (ok), 2400:cb00:2048:1::adf5:3d29 (ok)
ne10.uol.com.br                 has IPv4 200.147.32.121, 200.147.0.120, 200.147.0.121, 200.147.32.120 has IPv6 2804:49c:319:430::318 (ok)
www.adrenaline.uol.com.br       has IPv4 200.147.35.224, 200.147.3.199 has IPv6 2804:49c:319:430::326 (ok)
www.citeam.pl                   has IPv4 193.23.48.191 has IPv6 2a02:dc8:3:2::20 (ok)

hosts disappearing between 2012-02-20_0800 and 2012-02-21_0800:
www.anitube.co                  had IPv4 174.127.101.242 had IPv6 2607:f0d0:3001:a4::2 
www.colourbox.com               had IPv4 79.125.21.47 had IPv6 2a01:578:3::4f7d:152f 
www.davidnaylor.co.uk           had IPv4 173.245.61.115, 173.245.61.41 had IPv6 2400:cb00:2048:1::adf5:3d73 , 2400:cb00:2048:1::adf5:3d29 
www.detikfood.com               had IPv4 203.190.241.43, 203.190.242.69 had IPv6 2402:a000:0:1::100 
www.laquadrature.net            had IPv4 91.194.60.89 had IPv6 2001:67c:288::89 
www.radardedescontos.com.br     had IPv4 200.147.3.136, 200.147.99.165 had IPv6 2804:49c:319:430::147 
www.softlayer.com               had IPv4 66.228.118.51 had IPv6 2607:f0d0:1000:11:1::1