Check-Host.cc

Top-Level Domain

.io

Aggregated statistics for the top-level domain

Apex domains
we've enumerated
Subdomains seen
9,417,674
CT + DNS + brute
TLS certs
82,605
naming .io
Hosting ASNs
15
distinct origins

Distribucija domena

Apex domains with the most known subdomains — large orgs, telecoms, hosters.
Apex Subdomains
azurecontainerapps.io 3,450,869
keenetic.io 1,804,867
nip.io 327,234
sslip.io 261,010
azurecontainerapps-test.io 185,670
k4apps.io 174,298
nid.io 118,142
netcraze.io 84,005
starsweb.io 73,902
tktl.io 64,515
qzz.io 51,593
instruqt.io 30,029
nxcli.io 26,753
cloudhub.io 22,356
jsdelivr.io 19,471
aroapp-hcp.io 13,720
redhatworkshops.io 12,638
streamgpu.io 11,882
aroapp.io 11,627
cedevice.io 10,033
isccloud.io 9,082
tmachine.io 8,306
sfmc.io 8,257
wiz.io 7,930
upli.io 7,566
ikarem.io 7,421
icore.io 6,907
cxnpl.io 6,558
affiliatereel.io 6,066
galaxy-dev.io 5,343
cs-ide.io 5,092
cwan.io 4,883
azmk8s.io 4,862
lumar.io 4,781
fluffy-otter-5.telebit.io 4,768
sapcloud.io 4,710
enablon.io 4,678
backname.io 4,667
hotelengine.io 4,383
pegcloud.io 4,358
serious-cat-33.telebit.io 4,312
litegallery.io 4,281
gigantic.io 4,241
zuddl.io 4,192
wdr.io 4,181
ordinary-elephant-58.telebit.io 3,992
dishcloud.io 3,944
enotis.io 3,861
amazee.io 3,810
idemia.io 3,798

Top izdavaoci sertifikata

Issuer (CA) Certs
Amazon 29,661
Let's Encrypt 24,288
WR3 5,184
ca 4,756
YR1 1,895
YR2 1,828
YE2 1,753
Sectigo 1,672
YE1 1,654
RunCloud WebSSL Root CA 1,573
DigiCert 1,362
Cloudflare 1,224
GoDaddy 710
ZeroSSL 434
GlobalSign 364

Top hosting ASN-ovi

ASN Name .io domains
AS16509 Amazon.com 355,048
AS8075 Microsoft 322,122
AS13335 Cloudflare 133,702
AS396982 Google Cloud 59,656
AS14061 DigitalOcean 56,560
AS24940 Hetzner Online 55,355
AS16276 OVHcloud 36,377
AS214996 26,526
AS14618 Amazon AES 23,351
AS49505 Selectel Ltd. 21,570
AS41722 Miran 17,078
AS206834 16,838
AS47583 Hostinger International 16,512
AS54113 Fastly, Inc. 14,542
AS34762 Combell 12,867

Distribucija tehnološkog steka

No Wappalyzer detections

Body-fetcher hasn't covered enough .io sites yet for stack patterns to emerge.

Most-resolved apex domains

Apexes resolving to the most distinct A/AAAA records — popularity proxy.

Threat-intel hits

Feed Category Domains
openphish phishing 1,587
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