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fly.io

Every SSL/TLS certificate ever issued for this name, indexed from public CT logs.

csv export pro
total records
183
active · on this page
5
expired · on this page
15
unique issuers · on this page
8
issuers on this pageUnknown Issuer4Google Trust4Let's Encrypt4Unizeto Technologies…3Global Digital Cyber…2Microsoft1Amazon1DigiCert1
domainstatus
web2.fly.iocrt.sh
Unknown Issuer
expired 3y ago
admin.fly.iocrt.sh
Unknown Issuer
expired 3y ago
admin.fly.iocrt.sh
Unknown Issuer
expired 3y ago
sso.fly.iocrt.sh
Microsoft
expired 2y ago
docker-hub-mirror.fly.iocrt.sh
Unknown Issuer
expired 2y ago
analytics.fly.iocrt.sh
Amazon
expires in 2mo
analytics.fly.iocrt.sh
Google Trust
expires in 2mo
oidc.fly.iocrt.sh
Let's Encrypt
expired 5mo ago
litefs-staging.fly.iocrt.sh
Unizeto Technologies…
expired 5mo ago
registry.fly.iocrt.sh
Unizeto Technologies…
expired 6mo ago
docker-hub-mirror.fly.iocrt.sh
Unizeto Technologies…
expired 7mo ago
litefs.fly.iocrt.sh
Global Digital Cyber…
expired 7mo ago
litefs-staging.fly.iocrt.sh
Global Digital Cyber…
expired 7mo ago
litefs-staging.fly.iocrt.sh
DigiCert
expired 7mo ago
go.updates.fly.iocrt.sh
Google Trust
expires in 1mo
auth.fly.iocrt.sh
Let's Encrypt
expires in 20d
registry3.fly.iocrt.sh
Let's Encrypt
expires in 12d
api.fly.iocrt.sh
Google Trust
expired 23d ago
api.fly.iocrt.sh
Let's Encrypt
expired 23d ago
tokenizer.fly.iocrt.sh
Google Trust
expired 23d ago
Pipe results into your recon pipeline
# Python
$ pip install ct-radar
$ ct-radar fly.io | httpx -silent
# Go
$ go install github.com/imfht/ct-radar-cli/cli@latest
$ ct-radar fly.io | nuclei
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About certificate history for fly.io

This page lists every X.509 (SSL/TLS) certificate ever issued for fly.io and its subdomains, as recorded in public Certificate Transparency (CT) logs. CT logs are an immutable, append-only record of every certificate issued by participating Certificate Authorities (CAs), as required by the major browsers since 2018.

Subdomain enumeration via CT logs is one of the highest-signal techniques in reconnaissance — every time a TLS certificate is issued, all Subject Alternative Names (SANs) on that certificate become public. Internal and forgotten subdomains regularly show up here days after they're set up.

To monitor fly.io for newly-issued certificates in real-time (useful for detecting unauthorized issuance, phishing variants, or shadow IT) add it to your watchlist (Pro plan).