As of 2026-10-16, among the 68 registrars covered and ranked in the snapshot unified basis (counting eligible coupons; original currency listed per row), the cheapest .io registration is US$14.98 at Spaceship (needs a coupon code, limit 1 use, expiry unknown; without coupon US$31.98); renewal US$45.09 JP¥7128.00 at お名前.com; lowest 3-year cost US$118.48 at Spaceship (needs a coupon code, limit 1 use, expiry unknown; without coupon US$135.48) (3-year cost = registration + list-price renewal × 2, taxes excluded). Display currency defaults to USD and is switchable; displayed values are converted references.As of 2026-10-16, among the 68 registrars covered and ranked in the snapshot unified basis (not counting coupons; original currency listed per row), the cheapest .io registration is US$26.99 at Sav; renewal US$45.09 JP¥7128.00 at お名前.com; lowest 3-year cost US$122.31 at お名前.com (3-year cost = registration + list-price renewal × 2, taxes excluded). Display currency defaults to USD and is switchable; displayed values are converted references.
Price history (daily lowest registration and renewal, unified basis)
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68 registrars, showing #1–20 · ranked by price with eligible coupons as of 2026-10-16With couponsList prices
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2026-10-13
* Based on the registrar's published general policy and not verified per extension; individual extensions may be excluded. Check the registrar's own page. Privacy information checked 2026-10-14; see Data sources for references.
About .io
According to the registry, .io was first the country-code domain of the British Indian Ocean Territory. IANA lists Internet Computer Bureau Limited as its ccTLD manager. The registry says early adopters in the technology industry used .io as an abbreviation of "input/output". You do not need to live in the British Indian Ocean Territory to register a .io domain.
The UK and Mauritius signed a 2025 treaty on sovereignty over the Chagos Archipelago; in April 2026 the UK government said it could not bring it into force without US support.
Scope: Sovereignty over the British Indian Ocean Territory (the Chagos Archipelago). This entry only records what the two governments have published; it makes no prediction about what will happen to .io.
According to the registry, .io was first the country-code domain of the British Indian Ocean Territory.[1]
A joint statement by the UK and Mauritius governments on 2024-10-03 said they had reached a political agreement on the exercise of sovereignty over the Chagos Archipelago, including Diego Garcia, subject to a treaty.[2]
A UK government note of 2025-07-15 said the agreement was signed on 2025-05-22; once the treaty is in force Mauritius will be sovereign over the Chagos Archipelago and the British Indian Ocean Territory will no longer be a British Overseas Territory; UK law must change before it can come into force.[3]
According to the House of Lords record of 2026-04-14, the UK government said it could not let the treaty enter into force without US support, and that the bill would not pass in that parliamentary session.[4]
We only record events with sources and say whose statement each one is; we do not rate extensions. An event not listed here may still have happened. How we record events
.io price notes
On list prices (coupons not counted), the lowest first-year .io quote is from Sav: US$26.99 for the first year, US$51.99 to renew — renewal is about 1.9× the first-year price. Across the 67 registrars quoting both a first-year and a renewal price, the median renewal-to-first-year multiple is about 1.4×.
On the page's ranking basis (not counting coupons), the lowest 3-year cost is at お名前.com (US$122.31), not at Sav, the cheapest first year.
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Extensions for similar uses (by editorial category)
.netfromUS$4.98US$4.99Needs a coupon code · with it US$4.98 · lowest without a coupon US$4.99 · limit 1 use · expiry unknown
Internet Computer Bureau Limitedc/o Sure (Diego Garcia) Limited, Diego Garcia, British Indian Ocean Territories, PSC 466 Box 59, FPO-AP 96595-0059, British Indian Ocean Territory (the)
PublishedThe root zone publishes a DS record for .io, meaning the registry has registered a DNSSEC trust anchor with the root. Whether you can turn on DNSSEC for your own domain depends on the registrar.
Authoritative name servers (4)
Name servers the root zone lists for this extension. Addresses are the glue records in the root zone file; an address type that is not listed is one the root zone does not give, not one the server lacks.
.io is not on the extension list in China’s MIIT “Chinese Internet domain name system” page. Alibaba Cloud’s filing guide says suffixes not on the list cannot be used for ICP filing and that the registrar must also be approved by MIIT; being listed is a precondition only, not a guarantee that filing succeeds.
As of 2026-10-16, among the 68 registrars covered and ranked in the snapshot unified basis (counting eligible coupons; original currency listed per row), the cheapest .io registration is US$14.98 at Spaceship (needs a coupon code, limit 1 use, expiry unknown; without coupon US$31.98); renewal US$45.09 JP¥7128.00 at お名前.com; lowest 3-year cost US$118.48 at Spaceship (needs a coupon code, limit 1 use, expiry unknown; without coupon US$135.48) (3-year cost = registration + list-price renewal × 2, taxes excluded). Display currency defaults to USD and is switchable; displayed values are converted references.As of 2026-10-16, among the 68 registrars covered and ranked in the snapshot unified basis (not counting coupons; original currency listed per row), the cheapest .io registration is US$26.99 at Sav; renewal US$45.09 JP¥7128.00 at お名前.com; lowest 3-year cost US$122.31 at お名前.com (3-year cost = registration + list-price renewal × 2, taxes excluded). Display currency defaults to USD and is switchable; displayed values are converted references.
How is the 3-year cost for .io calculated?
3-year cost = registration + renewal × 2 in a unified currency basis (CNY at the snapshot fx version). Taxes excluded; renewals for years 2–3 are estimated at current prices and not guaranteed; promo prices shown separately with their own conditions.
Where does the .io data come from and how fresh is it?
Daily snapshots of the nazhumi.com open API across all quoting registrars. Page version: 2026-10-16 17:12 UTC. Failed per-suffix rounds keep the last published quote and are marked stale.
How much does a .io renewal cost, and is it the same as the first year?
On list prices, the lowest first-year .io quote is from Sav: US$26.99 for the first year and US$51.99 to renew, so renewal is about 1.9× the first-year price. Across 67 registrars quoting both prices, the median renewal-to-first-year multiple is about 1.4×. Because the first-year and renewal prices differ, compare on the 3-year cost; the registrar states the exact terms of any offer. Amounts are converted at the snapshot rate; the registrar's own page is authoritative.
How much does it cost to transfer a .io domain?
On list prices (coupons not counted), the cheapest .io transfer is at お名前.com: US$45.09. Amounts are converted at the snapshot rate; the registrar's own page is authoritative.
Are there restrictions on registering .io?
No eligibility requirements: anyone, anywhere can register, according to the registry. This applies to second-level registrations. No local presence is required for second-level registrations. Check the registrar's terms before you register.
Which events about .io have we recorded?
We have recorded 1: 2024-10-03 — Sovereignty / jurisdiction: The UK and Mauritius signed a 2025 treaty on sovereignty over the Chagos Archipelago; in April 2026 the UK government said it could not bring it into force without US support. Each entry cites its sources; an event not listed here may still have happened.
Who runs .io?
According to the IANA Root Zone Database, the ccTLD manager of .io is Internet Computer Bureau Limited.
Does the root zone publish a DS record for .io?
Yes. The root zone publishes a DS record for .io, so the extension has a DNSSEC trust anchor in the root. Whether you can enable DNSSEC on your own domain depends on the registrar.
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