I have some data on this. Trying to convey this in email is hard, so here’s a link to slides from Nov 2022 explaining the data:
https://www.icann.org/en/system/files/files/presentation-consolidation-amongst-top-level-domains-15nov22-en.pdf Below is a chart (pulled from debug output) for 18 Feb 2024 (a few days ago), if you want more current observations. This supports the notion that most gTLDs are hosted on some large platforms, ccTLDs generally are separate. There are some crossovers, of course. Revmap refers to the RIR managed top-level IPv4 and IPv6 zones. I think there is only one platform serving all three, thanks to Japan’s NIR function. Note - you may see separate organizations in one line. This is an artefact of how the groupings are made. While zones are transferring, it might make it look like two organizations have merged, which is not the case. It’s more a matter of transitioning the DNS zone management (SOA resource record) and updating the root zone database. Once transfers finalize, this data will separate the two organizations again. DNS in_all:461 in_gtld:448 in_cctld: 13 in_revmap: 0 dns='hostmaster.donuts.email.' DNS in_all:268 in_gtld:263 in_cctld: 5 in_revmap: 0 dns='admin.tldns.godaddy./dnsmaster.knipp.de./info.verisign-grs.com./nstld.verisign-grs.com.' DNS in_all:135 in_gtld:128 in_cctld: 7 in_revmap: 0 dns='hostmaster.centralnic.net./ops.uniregistry.net./regops.uniregistry.link.' DNS in_all:105 in_gtld: 0 in_cctld: 0 in_revmap:105 dns='dns-ops.arin.net.' DNS in_all: 74 in_gtld: 72 in_cctld: 2 in_revmap: 0 dns='hostmaster.nic.uk./hostmaster.nominet.org.uk.' DNS in_all: 65 in_gtld: 0 in_cctld: 0 in_revmap: 65 dns='dns.ripe.net.' DNS in_all: 62 in_gtld: 0 in_cctld: 0 in_revmap: 62 dns='read-txt-record-of-zone-first-dns-admin.apnic.net.' DNS in_all: 47 in_gtld: 47 in_cctld: 0 in_revmap: 0 dns='noc.gmoregistry.net.' DNS in_all: 46 in_gtld: 46 in_cctld: 0 in_revmap: 0 dns='cloud-dns-hostmaster.google.com.' DNS in_all: 23 in_gtld: 23 in_cctld: 0 in_revmap: 0 dns='td_dns_gtld.knet.cn.' DNS in_all: 21 in_gtld: 13 in_cctld: 8 in_revmap: 0 dns='dnsmaster.afnic.fr.' DNS in_all: 20 in_gtld: 20 in_cctld: 0 in_revmap: 0 dns='dnsmaster.corenic.org.' DNS in_all: 17 in_gtld: 1 in_cctld: 0 in_revmap: 16 dns='noc.dns.icann.org.' DNS in_all: 16 in_gtld: 0 in_cctld: 16 in_revmap: 0 dns='dns.registry.in.' DNS in_all: 13 in_gtld: 0 in_cctld: 0 in_revmap: 13 dns='hostmaster.lacnic.net.' DNS in_all: 11 in_gtld: 6 in_cctld: 5 in_revmap: 0 dns='hostmaster.coccaregistry.org.' DNS in_all: 10 in_gtld: 10 in_cctld: 0 in_revmap: 0 dns='ops.teleinfo.cn.' DNS in_all: 9 in_gtld: 0 in_cctld: 0 in_revmap: 9 dns='dns-admin.afrinic.net.' DNS in_all: 7 in_gtld: 7 in_cctld: 0 in_revmap: 0 dns='dnsmaster.irondns.net.' DNS in_all: 7 in_gtld: 6 in_cctld: 1 in_revmap: 0 dns='hostmaster.registro.br.' DNS in_all: 7 in_gtld: 4 in_cctld: 3 in_revmap: 0 dns='root.cnnic.cn./sysmgr.cnnic.cn.' DNS in_all: 6 in_gtld: 4 in_cctld: 2 in_revmap: 0 dns='admin-dns.cira.ca.' DNS in_all: 5 in_gtld: 5 in_cctld: 0 in_revmap: 0 dns='gtldsupport.aeda.ae.' DNS in_all: 5 in_gtld: 3 in_cctld: 1 in_revmap: 1 dns='root.dns.jp./root.nic.jprs./root.nic.ntt./root.nic.sakura.' DNS in_all: 5 in_gtld: 1 in_cctld: 4 in_revmap: 0 dns='hostmaster.nic.kn./snw.twnic.net.tw.' DNS in_all: 5 in_gtld: 2 in_cctld: 3 in_revmap: 0 dns='hostmaster.ripn.net.' DNS in_all: 4 in_gtld: 4 in_cctld: 0 in_revmap: 0 dns='support.registry.net.za.' DNS in_all: 4 in_gtld: 4 in_cctld: 0 in_revmap: 0 dns='hostmaster.tld-box.at.' DNS in_all: 4 in_gtld: 4 in_cctld: 0 in_revmap: 0 dns='support.ryce-rsp.com.' … for 3,2,1… From: Rubens Kuhl <rube...@nic.br> Date: Thursday, February 22, 2024 at 12:01 To: <dns-operati...@dns-oarc.net> Subject: Re: [dns-operations] Upcoming Registry Service Provider Evaluation Program I did some of the technical evaluations in the previous round, and we saw that the vast majority of applications used about five back end providers. Prequalifying those providers would have made the whole process much faster. R's, John [cid:image001.png@01DA658F.3B7D5850] new gTLD Statistics by Backends<https://ntldstats.com/backend> ntldstats.com<https://ntldstats.com/backend> lists 37 back-ends for gTLDs. I don’t think there is a readily available list for c Rubens
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