Check-Host.cc

Top-Level Domain

.app

Aggregated statistics for the top-level domain

Apex domains
820,994
we've enumerated
Subdomains seen
1,911,762
CT + DNS + brute
TLS certs
24,543
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 9,494
Amazon 6,393
WR3 1,778
YE1 926
YE2 843
Cloudflare 771
YR1 745
Sectigo 720
YR2 717
ZeroSSL 620
GoDaddy 459
DigiCert 265
GlobalSign 148
Certum 31
LiteSSL 29

Top Hosting ASNs

ASN Name .app domains
AS16509 Amazon.com 182,654
AS13335 Cloudflare 85,525
AS15169 Google LLC 38,220
AS8075 Microsoft 21,108
AS47846 18,127
AS396982 Google Cloud 18,039
AS14061 DigitalOcean 15,021
AS24940 Hetzner Online 14,781
AS42807 14,013
AS61969 10,457
AS54113 Fastly, Inc. 9,366
AS31898 Oracle Cloud Infrastructure 7,496
AS20940 Akamai Technologies 6,325
AS47583 Hostinger International 6,243
AS16276 OVHcloud 6,219

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 1,637
ℹ Coverage will improve significantly once CZDS zone-file access is granted for this TLD.