`a0.nic.io`

DNSSEC	⚠️ Not signed
A	2a01:8840:9e::17^{🇮🇪 AFILIAS-NST-ALTDB2a01:8840:9e::/48 Afilias NS087 A0}
		PTR	`a0.nic.io`
A	65.22.160.17^{🇺🇸 AFILIAS-NST-ALTDB65.22.160.0/24 Afilias, Inc.}

`nic.io`

	DNSSEC	⚠️ Not signed
	A	75.2.38.108^{🇺🇸 Amazon75.2.32.0/20}
	A	99.83.155.228^{🇺🇸 Amazon99.83.144.0/20}
	NS	`a0.nic.io` ⭐ ⚠️ Not in parent delegation
	NS	`a2.nic.io` ⚠️ Not in parent delegation
	NS	`b0.nic.io` ⚠️ Not in parent delegation
	NS	`c0.nic.io` ⚠️ Not in parent delegation
	MX	`aspmx.l.google.com` ⭐
	MX	`alt1.aspmx.l.google.com`⁽⁵⁾
	MX	`alt2.aspmx.l.google.com`⁽⁵⁾
	MX	`alt3.aspmx.l.google.com`⁽¹⁰⁾
	MX	`alt4.aspmx.l.google.com`⁽¹⁰⁾
	TXT	`v=spf1 include:_u.nic.io._spf.smart.ondmarc.com ?all`
	TXT	`google-site-verification=jbmKV4nd_r0o8cK2x4TlLRQ6eShNaZohqN7j5F7h3pA`
	TXT	`j0pv08ljpkkstff6jgxcyps8m1hq6f9j`
	TXT	`dx9f1fpvmtwzb34tbymgxg4r99jczg67`
	TXT	`6xyhl93x94lg1sw4xvw1zv8w2ty85054`
	SOA	`a0.nic.io`alerts@afilias.info serial=4167604462

WOT: SAFE (66/100)
rank #324529 globally
rank #2361 in the tld
WOT: SAFE (82/100)
📈 Tranco rank: #709

NIC.IO - The .IO Domain Registry

NIC.IO is the official registry and Network Information Centre for the .io country-code top-level domain (ccTLD). Originally assigned to the British Indian Ocean Territory, the .io extension has evolved into one of the most popular domains for technology companies and startups worldwide, valued for its resemblance to "I/O" (input/output) in computing.

Services

Domain registration on a first-come, first-served basis
WHOIS lookup services
No residency requirements (unlike many ccTLDs)
Global accessibility with DNS infrastructure worldwide

Technical Infrastructure

Type	Details
Nameservers	a0.nic.io, a2.nic.io, b0.nic.io, c0.nic.io
NS Network	65.22.160-163.17 (IPv4), 2a01:8840:9e-a1::17 (IPv6)
Web Hosting	Amazon Global Accelerator (75.2.38.108, 99.83.155.228)
Email	Google Workspace (aspmx.l.google.com)
DNSSEC	Enabled with DS record
SOA Contact	alerts@afilias.info

History & Ownership

The registry has operated since 1997 and is headquartered in Orpington, United Kingdom. The SOA contact references Afilias, a major domain registry services provider now part of Identity Digital (formed from the merger of Donuts and Afilias). Registrar services are powered by Name.com.

The .io domain has become a staple in startup culture, offering shorter and more memorable alternatives to traditional extensions like .com.

PTR for

17.160.22.65.in-addr.arpa

7.1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.e.9.0.0.0.4.8.8.1.0.a.2.ip6.arpa

NS for

io

nic.io

Previously NS for

Same first word

a0.fi

a0.de

a0.ru

a0.kz

a0.dp.ua

a0.com.cn

a0.eu

a0.ae

a0.co.kr

a0.by

a0.cz

a0.io

a0.si

a0.cn

a0.org

a0.cl

a0.com

a0.lv

a0.dk

a0.se

a0.com.tr

a0.fr

a0.dev

a0.hu

a0.tel

a0.lt

a0.pl

a0.no

a0.nl

a0.wiki

a0.com.br

a0.gs

a0.ca

a0.co.uk

a0.be

a0.net

Similar names

0a.ph

0a.no

0a.co

0a.dk

0a.su

0a.cn

0a.eu

0a.io

0a.rip

0a.ca

0a.tel

0a.pl

0a.fr

0a.cz

0a.au

0a.co.uk

0a.com.cn

0a.nl

0a.org

0a.com

0a.net

0a.se

0a.fi

0a.ru

0a.at

0a.design

0a.vg

DNS History

2 records (2 active, 0 former)

●A2a01:8840:9e::172017-07-01 → 2026-05-08 · 2 obs

● 2017-07-01 08:33:18
● 2026-05-08 01:54:32

●A65.22.160.172017-07-01 → 2026-05-08 · 2 obs

● 2017-07-01 08:33:18
● 2026-05-08 01:54:32

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
io	a0.nic.io, a2.nic.io, b0.nic.io, c0.nic.io	-

✅ Authoritative Response

Server:65.22.160.17

NS records: a0.nic.io, a2.nic.io, b0.nic.io, c0.nic.io

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 168ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`65.22.160.17`
AAAA	1	`2a01:8840:9e::17`

Analysis

Name Server Role

a0.nic.io serves as a name server for io and nic.io.

Together with a0.nic.io, a2.nic.io, b0.nic.io and c0.nic.io are commonly used as name servers.

IP Addresses

a0.nic.io resolves to two IP numbers: 2a01:8840:9e::17 and 65.22.160.17.

a0.nic.io - robtex.com

a0.nic.io

nic.io