Check-Host.cc

Top-Level Domain

.app

Aggregated statistics for the top-level domain

Apex domains
799,203
we've enumerated
Subdomains seen
1,826,784
CT + DNS + brute
TLS certs
23,907
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 9,429
Amazon 6,389
WR3 1,676
YE1 819
YE2 756
Cloudflare 744
Sectigo 702
YR1 661
YR2 647
ZeroSSL 599
GoDaddy 448
DigiCert 255
GlobalSign 142
Certum 30
LiteSSL 29

Top Hosting ASNs

ASN Name .app domains
AS16509 Amazon.com 178,076
AS13335 Cloudflare 82,286
AS15169 Google LLC 36,157
AS8075 Microsoft 20,848
AS47846 17,908
AS396982 Google Cloud 17,459
AS14061 DigitalOcean 14,562
AS24940 Hetzner Online 14,283
AS42807 13,178
AS61969 10,114
AS54113 Fastly, Inc. 8,946
AS31898 Oracle Cloud Infrastructure 7,429
AS20940 Akamai Technologies 6,184
AS16276 OVHcloud 6,001
AS47583 Hostinger International 5,774

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 1,601
ℹ Coverage will improve significantly once CZDS zone-file access is granted for this TLD.