Check-Host.cc

Top-Level Domain

.app

Aggregated statistics for the top-level domain

Apex domains
801,047
we've enumerated
Subdomains seen
1,835,248
CT + DNS + brute
TLS certs
23,974
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 9,438
Amazon 6,389
WR3 1,685
YE1 835
YE2 763
Cloudflare 747
Sectigo 703
YR1 669
YR2 650
ZeroSSL 602
GoDaddy 449
DigiCert 256
GlobalSign 143
Certum 30
LiteSSL 29

Top Hosting ASNs

ASN Name .app domains
AS16509 Amazon.com 178,409
AS13335 Cloudflare 82,632
AS15169 Google LLC 36,097
AS8075 Microsoft 20,877
AS47846 17,935
AS396982 Google Cloud 17,508
AS14061 DigitalOcean 14,609
AS24940 Hetzner Online 14,339
AS42807 13,316
AS61969 10,159
AS54113 Fastly, Inc. 8,973
AS31898 Oracle Cloud Infrastructure 7,445
AS20940 Akamai Technologies 6,193
AS16276 OVHcloud 6,013
AS47583 Hostinger International 5,790

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 1,619
ℹ Coverage will improve significantly once CZDS zone-file access is granted for this TLD.