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.io — 865,026 domains

Total domains
865,026
Root domains
626,405
Subdomains
238,621

Browse 865,026 registered .io domains in our database. The list includes 626,405 root domains and 238,621 subdomains. Data is updated daily and available for security research, brand monitoring, competitive analysis, and domain intelligence.

Domain names

Showing first 100 of 865,026 Download preview CSV
0--key.github.io
0-0.io
0-100.webflow.io
0-9.io
0-hands.itch.io
0-man.itch.io
0-space.itch.io
0-stamina.itch.io
0.asset.soup.io
0.readthedocs.io
0.soompi.io
0.viki.io
000.io
0000-bigtree.github.io
0000000.io
00013m.itch.io
0003.io
0007.io
00098.io
000ashvin.github.io
001-cms-content.webflow.io
001.io
001.readthedocs.io
0011.itch.io
001122.io
0016.io
003-hamburger-button.webflow.io
003-materialize-css.webflow.io
003-temp-portfolio.webflow.io
0033.io
004-button.webflow.io
005lumens.itch.io
006-100dwfix.webflow.io
006-cms-content.webflow.io
0067ed.github.io
007-cms-content.webflow.io
007n6.itch.io
008-button.webflow.io
0080.io
0099.io
00a3efdc0069dc3f302672429b8abf6d.cdn.bubble.io
00ae.io
00b.io
00d.io
00face.itch.io
00guess.itch.io
00l.io
00o.io
00sanoj00.github.io
00z.io
00zkript.gallerycdn.vsassets.io
01-io.io
01.inc.locdn.io
01000001.io
01000011.io
0101010101110011.io
01010111.itch.io
0101code.io
0101tech.io
0102.io
01061121592772c5f65b65620ca02059.cdn.bubble.io
01091056330.github.io
010abe69c6.nxcli.io
012.io
012345.io
0128abcd.itch.io
013renan.github.io
017-100dwfix.webflow.io
019-button.webflow.io
019.io
01ax.io
01az.io
01coin.io
01glitch10.itch.io
01kj00dekeerkring-live-be684823ba7f42ff-5bfb789.aldryn-media.io
01lab.io
01map.io
01stop.io
01stud.io
01trx.io
01works.io
02.itch.io
0203c1c956.nxcli.io
02179916.akstat.io
02179918.akstat.io
021vc.io
022-button.webflow.io
0225.io
023.io
024-100dwfix.webflow.io
024-button.webflow.io
02522-cua.github.io
02643.io
029.io
02hyc.github.io
02m.io
0301.io
0309hws.github.io
030group.io
031-navigation.webflow.io

Common questions about .io domains

How many .io domains are registered?

Our database currently indexes 865,026 .io domains, comprising 626,405 root domains and 238,621 subdomains. This count reflects actively registered domains discovered during our daily crawling cycle.

How fresh is the domain data?

All domain lists are refreshed every 24 hours. New registrations, expirations, and DNS changes propagate within one day — significantly fresher than weekly or monthly alternatives.

Can I export or download the full .io list?

Yes. Subscribers can download the complete .io dataset as CSV with domain and TLD columns, plus access enriched DNS records, filters, and streaming exports with no row limits.

What is the difference between root domains and subdomains?

A root domain is a domain registered directly under .io (e.g. example.io). A subdomain is a child of a root domain (e.g. www.example.io or mail.example.io). Both are included in our .io domain list.