Top-level domain
.io
Last fetched
.io is a top-level domain delegated in the DNS root zone and indexed by WhisperGraph, the internet-infrastructure graph behind the Whisper Internet Directory. Its most popular hostname by Tranco rank is sentry.io.
Most popular hostnames
The 100 highest-ranked .io hostnames in the Tranco Top 1M, most popular first.
- sentry.io
- github.io
- adobe.io
- h264.io
- pangle.io
- branch.io
- grammarly.io
- 0xrpc.io
- ipinfo.io
- intercom.io
- wpguardian.io
- oxylabs.io
- pushy.io
- itch.io
- bidr.io
- 1rx.io
- keenetic.io
- liftoff.io
- pendo.io
- yellowblue.io
- agora.io
- readthedocs.io
- docker.io
- 4dex.io
- presage.io
- statuspage.io
- bidmachine.io
- tubi.io
- netcraze.io
- astrumu.io
- cardgames.io
- adobestats.io
- ssstik.io
- indown.io
- litix.io
- sslip.io
- privacymanager.io
- split.io
- nic.io
- segment.io
- metamask.io
- shodan.io
- liftoff-creatives.io
- customer.io
- gos-gsp.io
- onetrust.io
- trustindex.io
- snapcraft.io
- home-assistant.io
- ioref.io
- nexx360.io
- ikarem.io
- scopely.io
- ogury.io
- aditude.io
- pxf.io
- redis.io
- huntress.io
- eqtv.io
- cloudx.io
- logitech.io
- mediago.io
- nip.io
- webflow.io
- cometchat.io
- omni-dex.io
- azurecontainerapps.io
- island.io
- merkle.io
- sjv.io
- found.io
- avs.io
- pantheonsite.io
- nextdns.io
- guard.io
- hotjar.io
- mrf.io
- es.io
- gitbook.io
- vimla.io
- elevenlabs.io
- ably.io
- akstat.io
- piano.io
- connectad.io
- clarium.io
- netbird.io
- siteimproveanalytics.io
- complianz.io
- codepen.io
- missena.io
- vwapps.io
- sanity.io
- jumpjump.io
- kandji.io
- greenhouse.io
- growthbook.io
- bitdrift.io
- termly.io
- gitlab.io
Top registrars (sampled)
Registrars of the 100 hostnames above — a sample of the most popular .io domains, not a registry-wide census.
- iana:81
30 of the sampled hostnames
- iana:146
15 of the sampled hostnames
- iana:1068
11 of the sampled hostnames
- iana:292
10 of the sampled hostnames
- iana:269
5 of the sampled hostnames
- iana:1387
3 of the sampled hostnames
- iana:1910
3 of the sampled hostnames
- iana:1011
3 of the sampled hostnames
- iana:468
2 of the sampled hostnames
- iana:470
2 of the sampled hostnames
Related pages
Pivot from .io into the hostnames and registrars beneath it.
Queries
The registrar rollup for this TLD's most popular hostnames, listed above.
UNWIND $hosts AS hn
MATCH (h:HOSTNAME {name: hn})-[:HAS_REGISTRAR]->(r:REGISTRAR)
WITH r.name AS registrar, count(*) AS hostnameCount
RETURN registrar, hostnameCount
ORDER BY hostnameCount DESC
LIMIT 10Or query Whisper from your own LLM workflow via the Whisper MCP server.