new hosts appearing between 2012-05-18_0800 and 2012-05-19_0800:
www.cht.com.tw                  has IPv4 202.39.225.136 has IPv6 2001:b000:180:3::136 (ok)
www.dhs.gov                     has IPv4 184.51.101.161 has IPv6 2600:1406:3:1:8e00::10f4 (ok), 2600:1406:3:1:8100::10f4 (ok)
www.faa.gov                     has IPv4 184.51.100.95 has IPv6 2600:1406:3:1:8800::fb5 (ok), 2600:1406:3:1:8a00::fb5 (ok)
www.fema.gov                    has IPv4 72.246.109.24 has IPv6 2600:1406:3:1:8700::ec (ok), 2600:1406:3:1:8a00::ec (ok)
www.hinet.net                   has IPv4 202.39.224.7 has IPv6 2001:b000:180:3::7 (ok)
www.mobily.com.sa               has IPv4 84.23.97.31 has IPv6 2a02:ce0:3:2::3 (ok)
www.opm.gov                     has IPv4 184.51.102.211 has IPv6 2600:1406:3:1:8800::1223 (ok), 2600:1406:3:1:8700::1223 (ok)
www.state.gov                   has IPv4 80.67.74.143, 80.67.74.145 has IPv6 2600:809:600::3f50:44a (ok), 2600:809:600::3f50:40a (ok)
www.usembassy.gov               has IPv4 80.67.74.143, 80.67.74.145 has IPv6 2600:809:600::3f50:40a (ok), 2600:809:600::3f50:44a (ok)

hosts disappearing between 2012-05-18_0800 and 2012-05-19_0800:
www.bitsnoop.com                had IPv4 31.7.59.14 had IPv6 2a02:29b8:1925::2