I added domain names of the explicit URLs in the Index. You can now search for any domain,
You should search for openarch_nl or hdl_handle_net
Endings of the URL are also added to the search engine so
hdl.handle.net is found if you search for hdl_handle_net or handle_net or just net
Searching for nl will find all profiles that link to a dutch domain.
Field name is Domain so you can also use it like domain=nl
Have fun.
Here is the summary of most linked domains.
familysearch.org,4325407
www.findagrave.com,2170677
www.wikitree.com,1775999
trees.ancestry.com,1293748
www.Ancestry.com,1090893
www.familysearch.org,732193
www.findmypast.com,382414
search.ancestry.com,305666
archive.org,296177
www.myheritage.com,108888
books.google.com,106143
www.ancestry.co.uk,94920
en.wikipedia.org,93921
www.geni.com,88622
www.nosorigines.qc.ca,88346
www.wiewaswie.nl,81620
search.ancestry.co.uk,69444
www.gro.gov.uk,65603
wc.rootsweb.ancestry.com,63837
findagrave.com,62531
www.freebmd.org.uk,59135
www.openarch.nl,57707
trove.nla.gov.au,57140
www.genealogybank.com,50599
sok.riksarkivet.se,50458
www.Ancestry.com.au,48174
www.ancestry.ca,47725
nla.gov.au,47427
www.genealogiequebec.com,44855
www.newspapers.com,43659
www.bdmhistoricalrecords.dia.govt.nz,43611
www.americanancestors.org,43029
civilrecords.irishgenealogy.ie,42759
www.genealogy.com,39513
search.findmypast.co.uk,38590
www.census.nationalarchives.ie,37854
www.thepeerage.com,37387
www.fold3.com,35827
familyhistory.bdm.nsw.gov.au,35473
bdmhistoricalrecords.dia.govt.nz,32920
archives.gnb.ca,32762
babel.hathitrust.org,32696
www.findmypast.co.uk,31576
gw.geneanet.org,31198
www.genealogieonline.nl,31183
freepages.genealogy.rootsweb.ancestry.com,31145
www.bac-lac.gc.ca,30509
www.bdm.nsw.gov.au,28861
www.freereg.org.uk,27818
data2.collectionscanada.gc.ca,27235
www.wvculture.org,25777
search.ancestry.ca,23823
central.bac-lac.gc.ca,22799
person.ancestry.com,22604
www.archives.gov,22434
allefriezen.nl,21859
www.genealogysa.org.au,21836
www.novascotiagenealogy.com,21655
www.billiongraves.com,21582
www.scotlandspeople.gov.uk,21437
data2.collectionscanada.ca,20485
www.arkivdigital.se,20396
www.legacy.com,20393
search.Ancestry.com.au,20346
interactive.ancestry.com,19805
play.google.com,19327
paperspast.natlib.govt.nz,18410
ma-vitalrecords.org,18210
www.digitalarkivet.no,17847
www.allegroningers.nl,17790
billiongraves.com,17325
online.justice.vic.gov.au,17078
aad.archives.gov,16962
www.cornwall-opc-database.org,16565
www.sa.dk,16518
www.bdm.vic.gov.au,16436
digi.ceskearchivy.cz,15855
wc.rootsweb.com,15626
familytreemaker.genealogy.com,15523
services.dar.org,15195
www.rootsweb.ancestry.com,14802
dcms.lds.org,14361
www.sos.mo.gov,14358
sv.wikipedia.org,14331
szukajwarchiwach.pl,14088
pr2.leoaretz.de,14081
www.prdh-igd.com,13690
files.usgwarchives.net,13393
www.collectionscanada.gc.ca,13330
worldconnect.rootsweb.ancestry.com,12272
www.iOS,11828
www.lan-opc.org.uk,11693
www.eggsa.org,11197
gravelocator.cem.va.gov,11041
allegroningers.nl,10668
freepages.rootsweb.com,10434
www.werelate.org,10246
www.archion.de,10174
sites.rootsweb.com,10081
www.jewishgen.org,10011