Check-Host.cc

Top-Level Domain

.app

Aggregated statistics for the top-level domain

Apex domains
826,874
we've enumerated
Subdomains seen
1,934,594
CT + DNS + brute
TLS certs
24,724
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 9,509
Amazon 6,393
WR3 1,812
YE1 962
YE2 866
Cloudflare 781
YR1 767
YR2 740
Sectigo 722
ZeroSSL 625
GoDaddy 461
DigiCert 267
GlobalSign 149
Certum 31
LiteSSL 30

Top Hosting ASNs

ASN Name .app domains
AS16509 Amazon.com 184,301
AS13335 Cloudflare 86,479
AS15169 Google LLC 38,610
AS8075 Microsoft 21,162
AS396982 Google Cloud 18,178
AS47846 18,159
AS14061 DigitalOcean 15,188
AS24940 Hetzner Online 14,899
AS42807 14,360
AS61969 10,571
AS54113 Fastly, Inc. 9,453
AS31898 Oracle Cloud Infrastructure 7,509
AS20940 Akamai Technologies 6,363
AS16276 OVHcloud 6,310
AS47583 Hostinger International 6,307

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 1,719
ℹ Coverage will improve significantly once CZDS zone-file access is granted for this TLD.