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.io — 856,186 domains

Total domains
856,186
Root domains
641,318
Subdomains
214,868

Browse 856,186 registered .io domains in our database. The list includes 641,318 root domains and 214,868 subdomains. Data is updated daily and available for security research, brand monitoring, competitive analysis, and domain intelligence.

Domain names

Showing first 100 of 856,186
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 856,186 .io domains, comprising 641,318 root domains and 214,868 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.