Reports / fly.io

fly.io

Generated Refresh data

We found 87 subdomains of fly.io in certificate transparency logs, passive DNS and DNS brute force; 25 resolve right now, including api.fly.io, app.fly.io and auth.fly.io. fly.io is registered with MarkMonitor Inc. since 2004-07-15 and expires 2033-07-15. Its SSL certificate from Let's Encrypt expires in 54 days. For email it has an SPF record, DMARC set to quarantine and DKIM keys on 4 common selectors.

Registration
MarkMonitor Inc.Since 2004-07-15 · expires 2033-07-15
SSL certificate
54 days leftLet's Encrypt
Subdomains
25 live87 discovered in total
Email authentication
SPF, DMARC, DKIMDMARC policy: quarantine

DNS records

6 of 7 types
A1
  • 37.16.18.81
AAAA1
  • 2a09:8280:1::a:791
MX5
  • 5 alt1.aspmx.l.google.com.
  • 5 alt2.aspmx.l.google.com.
  • 1 aspmx.l.google.com.
  • 10 alt3.aspmx.l.google.com.
  • 10 alt4.aspmx.l.google.com.
TXT12
  • "google-site-verification=379cCwTcRnv9DSPgO7yVqbpcdQwGQFJ2I8YS_KLGhp0"
  • "google-site-verification=5q_5HX7KS4tbjq8xa4s3cDITGNsvfP_45TdlEN1EHl0"
  • "google-site-verification=6-4NGHVsimTGK74KKPge726I27PuLMhCiUds9tsweGU"
  • "google-site-verification=OArdonQ-wgkSCtiZm8ot2oLIgorR5PS_r8mBIf2xGdE"
  • "google-site-verification=z7yrcJLj7gJJEicgVILh5EJrAmAcEQJ8t11bpcspQp8"
  • "rippling-domain-verification=cc555b35a2fa5ded"
Show all 12
  • "status-page-domain-verification=45m41jq1lznf"
  • "stripe-verification=8590be7414624f53382d4049d11f21b2e40b1fcd6a9c13ebee6e945cf61d4871"
  • "v=spf1 include:_spf.google.com include:helpscoutemail.com include:stspg-customer.com ~all"
  • "03D3122BDC"
  • "_6qhz8a8hhmv7vx0gk9eylqv9k240wu9"
  • "apple-domain-verification=mIsxYwEIYJeZOCwgSgclXPauTY3vXMKf8r6t8TGhEq4"
NS4
  • ns1970.hosted.flydns.net.
  • ns479.hosted.flydns.net.
  • ns967.hosted.flydns.net.
  • ns1077.hosted.flydns.net.
CAA No CAA records
SOA1
  • ns479.hosted.flydns.net. ops.fly.io. 1 7200 900 1209600 86400

Live lookup, cached up to 5 min.

WHOIS / RDAP

via fallback:https://rdap.identitydigital.services/rdap/
Registrar
MarkMonitor Inc.
Registered
2004-07-15
Expires
2033-07-15
Last updated
2026-08-12
Nameservers
ns479.hosted.flydns.netns967.hosted.flydns.netns1077.hosted.flydns.netns1970.hosted.flydns.net
Status
client delete prohibitedclient transfer prohibitedclient update prohibited

RDAP with port-43 WHOIS fallback, cached up to 1 h.

SSL certificate

Valid, 54 days left
Issuer
Let's EncryptCN=YE2,O=Let's Encrypt,C=US
Subject
fly.io
Valid from
2026-09-02 23:48 UTC
Valid until
2026-12-01 23:48 UTC
Serial number
558840220263172937285098402317459853159564
Names covered (1)
fly.io

Live TLS handshake on port 443, cached up to 6 h.

Subdomains

25 live · 87 discovered
  • analytics.fly.io66.241.124.249
  • api.fly.io77.83.143.220
  • app.fly.io77.83.143.220
  • auth.fly.io66.241.124.22
  • community.fly.io184.105.99.43
  • docker-hub-mirror.fly.ioflyio-registry-mirror.fly.dev
  • docs.fly.io162.159.143.13
  • email.e.fly.io34.110.180.34
  • email.mg.fly.io34.102.239.211
  • fly.io37.16.18.81
  • go.email.fly.io37.16.18.81
  • go.news.fly.io37.16.18.81
  • go.updates.fly.io37.16.18.81
  • oidc.fly.io37.16.14.187
  • portal.fly.io77.83.143.220
  • posthog.fly.io66.241.124.56
  • registry-iad.fly.io66.241.124.39
  • registry.fly.io77.83.143.221
  • registry2.fly.io213.188.208.4
  • registry3.fly.io213.188.220.16
  • sso.fly.io66.241.124.126
  • status.fly.io13.226.209.100
  • tokenizer.fly.io168.220.89.61
  • web.fly.io213.188.208.54
  • www.fly.iofly.io
62 more seen in CT logs and passive DNS that don't resolve now
  • admin.fly.io
  • api-canary.fly.io
  • audiofiction-dev.redis.fly.io
  • aws-lambda-example.fly.io
  • backends.fly.io
  • cached-s3-test.fly.io
  • cert-prop-test.ecdsa.fly.io
  • dawn-dust-9636.redis.fly.io
  • dry-morning-9915.redis.fly.io
  • ecdsa.fly.io
  • edge-client-cert.fly.io
  • featureupvote.fly.io
  • filestore.fly.io
  • future.fly.io
  • gae.fly.io
  • gcf.fly.io
  • gcloud-iad.fly.io
  • gcloud-lon.fly.io
  • gcloud-staging.fly.io
  • gcloud-us-west.fly.io
  • gcloud.fly.io
  • get.fly.io
  • git.fly.io
  • glitch.fly.io
  • google-cdn-test.fly.io
  • grafana.fly.io
  • gravitas.fly.io
  • imaginary.fly.io
  • js-test.fly.io
  • js.fly.io
  • kdavis-hello-fly.redis.fly.io
  • litefs-staging.fly.io
  • litefs.fly.io
  • magick.fly.io
  • ns1.fly.io
  • ns2.fly.io
  • ns3.fly.io
  • ns4.fly.io
  • ns5.fly.io
  • ns6.fly.io
  • ops.fly.io
  • packet.fly.io
  • play.fly.io
  • preview.fly.io
  • registry-test.fly.io
  • registry4.fly.io
  • rusthealth.fly.io
  • shw.io.edge.fly.io
  • sslscan.fly.io
  • test-cert-cleanup.ecdsa.fly.io
  • test1.ecdsa.fly.io
  • test2.ecdsa.fly.io
  • test3.ecdsa.fly.io
  • test4.ecdsa.fly.io
  • testing-acmev2.fly.io
  • uncached-s3-test.fly.io
  • vpn.fly.io
  • web2.fly.io
  • with-client-cert.fly.io
  • words.fly.io
  • wormhole.fly.io
  • your-app-name.fly.io
Sources: certspotter 6 · rapiddns 54 · virustotal 83 · subfinder 4

From CT logs, passive DNS (25+ sources) and brute-force. Live means it resolves now.

SPF Present
v=spf1 include:_spf.google.com include:helpscoutemail.com include:stspg-customer.com ~all
DMARC Present
p=quarantine
v=DMARC1; p=quarantine; sp=quarantine; rua=mailto:re+7e0d8e1047ca@inbound.dmarcdigests.com; ruf=mailto:ruf@fly.io; pct=100
DKIM 4 found
google._domainkeyk1._domainkeyintercom._domainkeym1._domainkey
Show public keys
google._domainkey.fly.io
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA1B5h97qDDWp93UT/5F/PjRaQKQD2vljWwsMDoVQs2P9I9Q8KtNZIX/UYLkZzzwIMU49HGW27RtjmE6hgBB1U35QwDLHJeBVKq7AprDX4ds+yq+DhoasxOZSk5gXikbPg4g2fQ//Fx9M5iAUDHHZlJUa57VCWVV8bMWjjVjm8OplVLu7HdqTRatj5e2Cd5R4VBjScI0XUNzlOXkSDnAiVtKgT8t+wZ8nsIyTSdbqj5gaJK2Ep+VdflUHOUmDWwG4+suYmgrwwsEWK3rein0R9KaKk1f8cInmAcX2SUgGoLV1tGxPfRDfyK+typ8MVsT3ZcnKq53Cmige4o7GTb/pZYwIDAQAB
k1._domainkey.fly.io
k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDQgYdYNsFOHHYWSiG1jceBH9bzcGRc1i0ssvB0MouUQay5/cgwnz065gLQgUT+Gey7zUVOe6fOmPFzx4MXFDpQEwKKBmwl221O3SLbJubSQnwMf3hPsM4WQvbSszS5izX10DH4d895dpFYYvF8IZgfusdUZU1svetaPeX4u4MnpwIDAQAB
intercom._domainkey.fly.io
k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQD0/lVVH5xSQD4Tm1nVPs7Q845kNBZFDe2x8MytBilrtmwVfg7sWD+QqP87qgyXdn5PYjOC7bFkodf2zjFbOoBDpzpTf64QV32yNMONMce6HJvteUZdnYf31CJVx+lqF/Ngjs7/Whip6XkRDqu/aAAGcPxZcPqy0kY1XNMvLkunZwIDAQAB
m1._domainkey.fly.io
k=rsa; t=s; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDCUsMXVyvoTUJ3Ov/NAsONt5pXDjUfIJF8h4gZ4qcswAdOXZ8BBqGfLz5uq8PWXdfwZTP8k4aPiqgm8MuGNYXa2Hk974OtgXJSMkJ4XToZHhIXJTxcTO2dpcdn71PBuc4hotsfOGmMP6js3iT2tIppDv+3omcJ/bpb+NoRxpjOuwIDAQAB

DKIM checked on 29 common selectors; custom ones can't be discovered. Cached up to 1 h.

Got an email from fly.io asking you to change bank details? Check it before you pay

Get this report as JSON

One call returns everything on this page. Each section is also its own endpoint.

curl "https://domain-intelligence-api.p.rapidapi.com/lookup/fly.io" \
  -H "X-RapidAPI-Host: domain-intelligence-api.p.rapidapi.com" \
  -H "X-RapidAPI-Key: YOUR_RAPIDAPI_KEY"
1,000 requests a month free, no card Paid plans up to 5M a month ?wait=1 waits for every subdomain source to finish

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