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fly.io

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

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20 on page · 183 matched
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
domainissuervalidstatus
web2.fly.iocrt.sh
Unknown Issuer
Unknown IssuerNov 23, 2022→Feb 21, 2023expired 3y ago
admin.fly.iocrt.sh
Unknown Issuer
Unknown IssuerOct 25, 2022→Jan 23, 2023expired 3y ago
admin.fly.iocrt.sh
Unknown Issuer
Unknown IssuerOct 25, 2022→Jan 23, 2023expired 3y ago
sso.fly.iocrt.sh
Microsoft
MicrosoftJan 7, 2024→Apr 6, 2024expired 2y ago
docker-hub-mirror.fly.iocrt.sh
Unknown Issuer
Unknown IssuerNov 13, 2023→Feb 11, 2024expired 2y ago
analytics.fly.iocrt.sh
Amazon
AmazonApr 13, 2026→Jul 12, 2026expires in 2mo
analytics.fly.iocrt.sh
Google Trust
Google TrustApr 13, 2026→Jul 12, 2026expires in 2mo
oidc.fly.iocrt.sh
Let's Encrypt
Let's EncryptSep 4, 2025→Dec 3, 2025expired 5mo ago
litefs-staging.fly.iocrt.sh
Unizeto Technologies…
Unizeto Technologies…Aug 11, 2025→Nov 9, 2025expired 5mo ago
registry.fly.iocrt.sh
Unizeto Technologies…
Unizeto Technologies…Jul 20, 2025→Oct 18, 2025expired 6mo ago
docker-hub-mirror.fly.iocrt.sh
Unizeto Technologies…
Unizeto Technologies…Jul 5, 2025→Oct 3, 2025expired 7mo ago
litefs.fly.iocrt.sh
Global Digital Cyber…
Global Digital Cyber…Jun 20, 2025→Sep 18, 2025expired 7mo ago
litefs-staging.fly.iocrt.sh
Global Digital Cyber…
Global Digital Cyber…Jun 12, 2025→Sep 10, 2025expired 7mo ago
litefs-staging.fly.iocrt.sh
DigiCert
DigiCertJun 12, 2025→Sep 10, 2025expired 7mo ago
go.updates.fly.iocrt.sh
Google Trust
Google TrustMar 22, 2026→Jun 20, 2026expires in 1mo
auth.fly.iocrt.sh
Let's Encrypt
Let's EncryptFeb 25, 2026→May 26, 2026expires in 20d
registry3.fly.iocrt.sh
Let's Encrypt
Let's EncryptFeb 17, 2026→May 18, 2026expires in 12d
api.fly.iocrt.sh
Google Trust
Google TrustJan 13, 2026→Apr 13, 2026expired 23d ago
api.fly.iocrt.sh
Let's Encrypt
Let's EncryptJan 13, 2026→Apr 13, 2026expired 23d ago
tokenizer.fly.iocrt.sh
Google Trust
Google TrustJan 12, 2026→Apr 12, 2026expired 23d ago
showing 141–160 · 8/10
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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
Free tier: 100 searches/day · Pro $29/mo for 10,000/day

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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).