Check-Host.cc

Top-Level Domain

.app

Aggregated statistics for the top-level domain

Apex domains
802,610
we've enumerated
Subdomains seen
1,840,262
CT + DNS + brute
TLS certs
24,022
naming .app
Hosting ASNs
15
distinct origins

Domain Distribution

Apex domains with the most known subdomains — large orgs, telecoms, hosters.

Top Certificate Issuers

Issuer (CA) Certs
Let's Encrypt 9,443
Amazon 6,390
WR3 1,690
YE1 841
YE2 772
Cloudflare 749
Sectigo 708
YR1 675
YR2 655
ZeroSSL 604
GoDaddy 451
DigiCert 256
GlobalSign 143
Certum 30
LiteSSL 29

Top Hosting ASNs

ASN Name .app domains
AS16509 Amazon.com 178,801
AS13335 Cloudflare 82,860
AS15169 Google LLC 36,228
AS8075 Microsoft 20,896
AS47846 17,972
AS396982 Google Cloud 17,552
AS14061 DigitalOcean 14,645
AS24940 Hetzner Online 14,372
AS42807 13,352
AS61969 10,190
AS54113 Fastly, Inc. 8,986
AS31898 Oracle Cloud Infrastructure 7,452
AS20940 Akamai Technologies 6,203
AS16276 OVHcloud 6,028
AS47583 Hostinger International 5,813

Tech-Stack Distribution

No Wappalyzer detections

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

Threat-intel hits

Feed Category Domains
openphish phishing 1,619
ℹ Coverage will improve significantly once CZDS zone-file access is granted for this TLD.