Skip to content

WHOIS Lookup: a.co

Domain registration and ownership information for A.co

📋 Registration Details
RegistrarMarkMonitor, Inc.
Registered2010-04-26 07:50:34
Expires2027-04-25 23:59:59
Nameserverspdns4.ultradns.org
pdns2.ultradns.net
pdns5.ultradns.info
pdns6.ultradns.co.uk
pdns3.ultradns.org
pdns1.ultradns.net
Statusclientupdateprohibited https://icann.org/epp#clientupdatepr…clienttransferprohibited https://icann.org/epp#clienttransf…clientupdateprohibited (https://www.icann.org/epp#clientupd…clienttransferprohibited (https://www.icann.org/epp#clientt…servertransferprohibited (https://www.icann.org/epp#servert…serverupdateprohibited (https://www.icann.org/epp#serverupd…serverupdateprohibited https://icann.org/epp#serverupdatepr…clientdeleteprohibited (https://www.icann.org/epp#clientdel…serverdeleteprohibited (https://www.icann.org/epp#serverdel…serverdeleteprohibited https://icann.org/epp#serverdeletepr…servertransferprohibited https://icann.org/epp#servertransf…clientdeleteprohibited https://icann.org/epp#clientdeletepr…
📄 Raw WHOIS Record
{
  "domain_name": "A.CO",
  "registrar": "MarkMonitor, Inc.",
  "registrar_url": "http://www.markmonitor.com",
  "reseller": null,
  "whois_server": "whois.markmonitor.com",
  "referral_url": null,
  "updated_date": [
    "2026-02-05 00:22:03+00:00",
    "2026-04-13 21:51:15+00:00"
  ],
  "creation_date": "2010-04-26 07:50:34+00:00",
  "expiration_date": [
    "2027-04-25 23:59:59+00:00",
    "2027-04-25 00:00:00+00:00"
  ],
  "name_servers": [
    "PDNS3.ULTRADNS.ORG",
    "PDNS4.ULTRADNS.ORG",
    "PDNS2.ULTRADNS.NET",
    "PDNS1.ULTRADNS.NET",
    "PDNS5.ULTRADNS.INFO",
    "PDNS6.ULTRADNS.CO.UK"
  ],
  "status": [
    "serverUpdateProhibited https://icann.org/epp#serverUpdateProhibited",
    "serverDeleteProhibited https://icann.org/epp#serverDeleteProhibited",
    "serverTransferProhibited https://icann.org/epp#serverTransferProhibited",
    "clientTransferProhibited https://icann.org/epp#clientTransferProhibited",
    "clientUpdateProhibited https://icann.org/epp#clientUpdateProhibited",
    "clientDeleteProhibited https://icann.org/epp#clientDeleteProhibited",
    "clientUpdateProhibited (https://www.icann.org/epp#clientUpdateProhibited)",
    "clientTransferProhibited (https://www.icann.org/epp#clientTransferProhibited)",
    "clientDeleteProhibited (https://www.icann.org/epp#clientDeleteProhibited)",
    "serverUpdateProhibited (https://www.icann.org/epp#serverUpdateProhibited)",
    "serverTransferProhibited (https://www.icann.org/epp#serverTransferProhibited)",
    "serverDeleteProhibited (https://www.icann.org/epp#serverDeleteProhibited)"
  ],
  "emails": [
    "[email protected]",
    "[email protected]",
    "[email protected]"
  ],
  "dnssec": "unsigned",
  "name": "Hostmaster, Amazon Legal Dept.",
  "org": "Amazon Technologies, Inc.",
  "address": "P.O. Box 8102",
  "city": "Reno",
  "state": "NV",
  "registrant_postal_code": "89507",
  "country": "US",
  "tech_name": "Hostmaster, Amazon Legal Dept.",
  "tech_org": null,
  "admin_name": null,
  "admin_org": null
}
ℹ️ What Is WHOIS?

WHOIS is a public database that stores domain registration records. Every registered domain has a WHOIS entry containing the registrar, creation date, expiry date, and nameserver configuration.

For a.co, the WHOIS record shows who registered the domain and when. Many registrars offer privacy protection that masks the registrant's personal details, but the technical data (nameservers, dates, status codes) remains visible.

🌐 Register a Domain

Looking to register a .co domain? Compare top registrars:

Namecheap
From $5.98/yr · Free WHOIS privacy → GoDaddy
From $0.99/yr first year → Cloudflare
At-cost pricing · No markup →

Prices shown are approximate. Links may be affiliate.

🔧 More Tools for A
📊 Full Analysis 🌐 DNS Records 📋 HTTP Headers 🔒 SSL Certificate ⬆️ Uptime Status 📑 Full Report