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fly.io

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

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Filters
20 on page · 203 matched
total records
203
active · on this page
2
expired · on this page
18
unique issuers · on this page
3
issuers on this pageLet's Encrypt11Unknown Issuer7Microsoft2
domainissuervalidstatus
api.fly.iocrt.sh
Microsoft
MicrosoftJan 29, 2023→Apr 29, 2023expired 3y ago
gravitas.fly.iocrt.sh
Unknown Issuer
Unknown IssuerDec 27, 2022→Mar 27, 2023expired 3y ago
registry.fly.iocrt.sh
Unknown Issuer
Unknown IssuerNov 30, 2022→Feb 28, 2023expired 3y ago
web.fly.iocrt.sh
Unknown Issuer
Unknown IssuerNov 23, 2022→Feb 21, 2023expired 3y ago
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
portal.fly.iocrt.sh
Let's Encrypt
Let's EncryptSep 19, 2024→Dec 18, 2024expired 1y ago
www.fly.iocrt.sh
Let's Encrypt
Let's EncryptSep 15, 2024→Dec 14, 2024expired 1y ago
auth.fly.iocrt.sh
Let's Encrypt
Let's EncryptSep 1, 2024→Nov 30, 2024expired 1y ago
portal.fly.iocrt.sh
Let's Encrypt
Let's EncryptJul 21, 2024→Oct 19, 2024expired 1y ago
community.fly.iocrt.sh
Let's Encrypt
Let's EncryptJul 20, 2024→Oct 18, 2024expired 1y ago
words.fly.iocrt.sh
Let's Encrypt
Let's EncryptJun 18, 2024→Sep 16, 2024expired 1y ago
litefs-staging.fly.iocrt.sh
Let's Encrypt
Let's EncryptJun 15, 2024→Sep 13, 2024expired 1y ago
fly.iocrt.sh
Let's Encrypt
Let's EncryptMay 17, 2024→Aug 15, 2024expired 1y ago
api.fly.iocrt.sh
Let's Encrypt
Let's EncryptMar 24, 2024→Jun 22, 2024expired 1y 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
oidc.fly.iocrt.sh
Let's Encrypt
Let's EncryptMay 2, 2026→Jul 31, 2026expires in 2mo
oidc.fly.iocrt.sh
Let's Encrypt
Let's EncryptMay 2, 2026→Jul 31, 2026expires in 2mo
showing 141–160 · 8/11
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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).