Top 50 Third-Level Domain Names

 926726 dialup.ans.net               64919 ts32.hinet.net
 739133 ipt.aol.com                  64731 s86b1.baynetworks.com
 580582 da.uu.net                    64611 global.medtronic.com
 398682 iptr.aol.com                 64488 corp.3com.com
 260897 pub-ip.psi.net               64334 ncsc.navy.mil
 243174 saturn.bbn.com               64262 state.tx.us
 240404 demon.co.uk                  63876 med.umich.edu
 226060 dial-access.att.net          62445 chchpoly.ac.nz
 206739 k12.ca.us                    59081 dacom.co.kr
 170399 us.ibm.net                   56790 nola.navy.mil
 167921 keesler.af.mil               56310 ramstein.af.mil
 148188 k12.mn.us                    54755 ts.hinet.net
 121822 ix.netcom.com                53573 k12.ut.us
 116984 k12.or.us                    53511 k12.il.us
  89122 iijnet.or.jp                 52781 dip.t-online.de
  86269 dialup.autonet.net           51259 unknown.uunet.be
  72631 usace.army.mil               50017 mesh.ad.jp
  65557 dialup.mindspring.com        48635 gw.eni.net
  65024 c.cdc.com                    47204 nhk.or.jp
  65024 b.cdc.com                    46261 ausnet.net.au
  65014 names.hal.com                45139 wave.shaw.ca
  65007 internal.radian.com          44865 infoweb.or.jp
  65007 a.cdc.com                    43922 k12.in.us
  64928 ts31.hinet.net               38181 infosphere.or.jp
  64923 ts30.hinet.net               37736 st.coat.com

Internet Domain Survey