new hosts appearing between 2011-07-30_1500 and 2011-07-30_2000:
www.bumik.ru
www.ietf.org

hosts disappearing between 2011-07-30_1500 and 2011-07-30_2000:
www.big.or.jp
www.cfos.de
www.deliciousdays.com
www.nihon-u.ac.jp