.io Domain List (CSV)

Download New, Active & Historic .io Domains — Updated Multiple Times Daily

  • 1,990,718 known .io domains
  • 1,309,557 active .io domains
  • 776 new .io domains discovered in the last 24 hours

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What's in the free sample?

.io

Download .io Domain Names

Access our comprehensive database of .io domains. Whether you're tracking new domain registrations, analyzing active websites, or researching internet domain trends within the .io zone, our domain database is the ideal solution — and it's ready for download in CSV format.

We continuously monitor the internet to find new .io domains, using registry data where available, DNS checks, crawlers and machine learning. In the past 24 hours, we have discovered 776 new .io domains.

Last Data Update: 2026-10-25 00:43:38

Filename Description Domain Count Filesize (uncompressed) Filesize (compressed)
io-domains-all.zip All known .io domains 1,990,718 26 MiB 6 MiB Download
io-domains-active.zip Active .io domains 1,309,557 17 MiB 4 MiB Download
io-domains-2026-10-25.zip Newly discovered .io domains 2026-10-25 (today, still growing) 18 258 B 305 B Download
io-domains-2026-10-24.zip Newly discovered .io domains 2026-10-24 (complete day) 975 13 KiB 6 KiB Download
io-domains-2026-10-23.zip Newly discovered .io domains 2026-10-23 1,332 18 KiB 7 KiB Download
io-domains-2026-10-22.zip Newly discovered .io domains 2026-10-22 2,371 31 KiB 12 KiB Download
io-domains-2026-10-21.zip Newly discovered .io domains 2026-10-21 1,275 17 KiB 7 KiB Download
io-domains-2026-10-20.zip Newly discovered .io domains 2026-10-20 1,238 17 KiB 7 KiB Download
io-domains-2026-10-19.zip Newly discovered .io domains 2026-10-19 1,233 17 KiB 7 KiB Download
io-domains-2026-10-18.zip Newly discovered .io domains 2026-10-18 1,945 25 KiB 10 KiB Download
io-domains-2026-10-17.zip Newly discovered .io domains 2026-10-17 1,093 15 KiB 6 KiB Download
io-domains-2026-10-16.zip Newly discovered .io domains 2026-10-16 1,219 17 KiB 7 KiB Download

Show Full List of All TLDs

Information About the .io Domain Extension

The .io domain suffix is a ccTLD (Country Code Top-Level Domain), managed by Internet Computer Bureau Limited. Our database contains a comprehensive list of known .io domains, helping businesses, researchers, and SEO professionals access up-to-date domain records with ease.

Type ccTLD
Description Country Code Top-Level Domain
Sponsor Internet Computer Bureau Limited
Country GB
Whois Server whois.nic.io
SOA Server a0.nic.io
SOA Email hostmaster@donuts.email
Created 1997-09-16

Why Choose DomainMetaData for .io Domain Lists?

Frequent Updates

Fresh .io domain lists several times a day.

Comprehensive Dataset

Access all 1,990,718 known .io domain records.

Checked in DNS

Download 1,309,557 active .io domains, re-checked every few days.

Rich Metadata

Premium (coming soon): DNS, technology, page titles and more for every .io domain. Details

Premium Domain Data for Professionals coming soon

  • Page Title & Meta Headers
  • DNS Servers, SOA Records, Mail Server
  • Hosting Server, Website Category & Topic
  • Robots.txt, HTTPS Status, HTTP Protocol Versions

Basic already includes all known, active and newly discovered .io domains. What's in each plan

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How Industry Leaders Use Our .io Domain Database

Marketing &
SEO Research

Analyze website trends and track new .io domain registrations.

Cybersecurity &
Threat Intelligence

Monitor new .io domains for phishing, scams, or malicious activities.

Brand Protection &
Trademark Monitoring

Detect .io domain squatters and brand impersonators.

Lead Generation &
Data Enrichment

Use .io domain lists to find potential leads & business opportunities.

Frequently Asked Questions About .io Domains

As of October 25, 2026, DomainMetaData counts 1,309,557 active .io domains, i.e. domains with at least one DNS record. In the last 24 hours, DomainMetaData discovered 776 new .io domains. Nobody can see every domain, so read this as an "at least" number.

On a typical day, DomainMetaData discovers about 1,275 new .io domains (median of the last 7 complete days). The new domains of each day are available as a separate download.

Right here on DomainMetaData, the database of internet domains. The list of all 1,309,557 active .io domains is a ZIP-compressed CSV file that is updated multiple times a day, together with daily lists of newly registered .io domains.

DomainMetaData offers free samples of every .io list after signing up for a free account. The samples are the complete files with part of each name masked, so you can check completeness and freshness before you buy (how free samples work). The complete lists are part of the Basic plan for US$55 per month or US$149 per year.

Active are the .io domains that currently have a DNS record. All known (1,990,718) also contains every .io domain we have ever seen that has stopped resolving, e.g. expired or deleted ones — without dates. There is no separate list of dropped domains.

.io is a Country Code Top-Level Domain (ccTLD) managed by Internet Computer Bureau Limited.

A ZIP file with a plain CSV list, one domain name per line and no header, ready to use in Excel, scripts or your database.

Download .io Domains Now!

  • Get instant access to our comprehensive database of .io domains
  • Bulk downloads as plain lists, one domain per line
  • Updated several times a day with newly discovered domains
  • New, active, and all known .io domains, including inactive ones
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