Check-Host.cc

Top-Level Domain

.app

Aggregated statistics for the top-level domain

Apex domains
842,035
we've enumerated
Subdomains seen
2,006,932
CT + DNS + brute
TLS certs
25,178
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 9,552
Amazon 6,398
WR3 1,890
YE1 1,026
YE2 942
YR1 829
Cloudflare 795
YR2 790
Sectigo 732
ZeroSSL 639
GoDaddy 470
DigiCert 274
GlobalSign 150
LiteSSL 31
Certum 31

Top Hosting ASNs

ASN Name .app domains
AS16509 Amazon.com 187,331
AS13335 Cloudflare 88,798
AS15169 Google LLC 39,999
AS8075 Microsoft 21,353
AS396982 Google Cloud 18,573
AS47846 18,297
AS42807 16,975
AS14061 DigitalOcean 15,452
AS24940 Hetzner Online 15,220
AS61969 10,867
AS54113 Fastly, Inc. 9,656
AS31898 Oracle Cloud Infrastructure 7,534
AS47583 Hostinger International 6,465
AS16276 OVHcloud 6,462
AS20940 Akamai Technologies 6,421

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 1,865
ℹ Coverage will improve significantly once CZDS zone-file access is granted for this TLD.