Check-Host.cc

Top-Level Domain

.app

Aggregated statistics for the top-level domain

Apex domains
836,261
we've enumerated
Subdomains seen
1,976,864
CT + DNS + brute
TLS certs
25,017
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 9,533
Amazon 6,397
WR3 1,867
YE1 998
YE2 913
YR1 808
Cloudflare 792
YR2 778
Sectigo 728
ZeroSSL 634
GoDaddy 464
DigiCert 272
GlobalSign 150
LiteSSL 31
Certum 31

Top Hosting ASNs

ASN Name .app domains
AS16509 Amazon.com 186,250
AS13335 Cloudflare 87,802
AS15169 Google LLC 39,363
AS8075 Microsoft 21,270
AS396982 Google Cloud 18,431
AS47846 18,267
AS42807 15,632
AS14061 DigitalOcean 15,343
AS24940 Hetzner Online 15,107
AS61969 10,800
AS54113 Fastly, Inc. 9,574
AS31898 Oracle Cloud Infrastructure 7,529
AS16276 OVHcloud 6,404
AS20940 Akamai Technologies 6,402
AS47583 Hostinger International 6,402

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 1,811
ℹ Coverage will improve significantly once CZDS zone-file access is granted for this TLD.