Whois & RDAP Lookup
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RDAPDomainctbctelecom.com.br
Handlectbctelecom.com.br
Registered1996-12-10 11:00 UTC
Expires2027-12-10 11:00 UTC
Updated2025-01-07 12:42 UTC
DNSSECUnsigned
RegistrantALGAR TELECOM S/A
AddressBR
Admin ContactALGAR TELECOM S/A
Email[email protected]
AddressBR
Tech ContactCTBC - Núcleo de Aministração de IPs
Email[email protected]
AddressBR
Statusactive
Nameserverstricia.ns.cloudflare.com
yevgen.ns.cloudflare.com
yevgen.ns.cloudflare.com
Registry RDAPhttps://rdap.registro.br
Raw WHOIS response
% Copyright (c) Nic.br - Use of this data is governed by the Use and % Privacy Policy at https://registro.br/upp . Distribution, % commercialization, reproduction, and use for advertising or similar % purposes are expressly prohibited. % 2026-11-04T20:43:17-03:00 - 202.214.143.11 domain: ctbctelecom.com.br owner: ALGAR TELECOM S/A owner-c: ALTSA49 tech-c: CNI15 nserver: tricia.ns.cloudflare.com nsstat: 20261103 AA nslastaa: 20261103 nserver: yevgen.ns.cloudflare.com nsstat: 20261103 AA nslastaa: 20261103 created: 19961210 #24685 changed: 20250107 expires: 20271210 status: published nic-hdl-br: ALTSA49 person: ALGAR TELECOM S/A created: 20140820 changed: 20250609 nic-hdl-br: CNI15 person: CTBC - N�cleo de Aministra��o de IPs created: 20060417 changed: 20250609 % Security and mail abuse issues should also be addressed to cert.br, % respectivelly to [email protected] and [email protected] % % whois.registro.br only accepts exact match queries for domains, % registrants, contacts, tickets, providers, IPs, and ASNs. % Query time: 1847 msec % WHEN: Wed Nov 04 23:43:15 UTC 2026
Raw RDAP JSON (registry) https://rdap.registro.br
{
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "registration",
"eventDate": "2014-08-20T17:58:33Z"
},
{
"eventAction": "last changed",
"eventDate": "2025-06-09T12:49:37Z"
}
],
"handle": "ALTSA49",
"objectClassName": "entity",
"roles": [
"administrative"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"kind",
{},
"text",
"individual"
],
[
"fn",
{},
"text",
"ALGAR TELECOM S/A"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"lang",
{},
"language-tag",
"pt"
],
[
"adr",
{},
"text",
[
"",
"",
"",
"",
"",
"",
"BR"
]
]
]
]
}
],
"events": [
{
"eventAction": "registration",
"eventDate": "1998-03-12T12:00:00Z"
},
{
"eventAction": "last changed",
"eventDate": "2024-08-22T14:12:38Z"
}
],
"handle": "71208516000174",
"legalRepresentative": "Diretoria de Planejamento e Tecnologia",
"links": [
{
"href": "https://rdap.registro.br/entity/71208516000174",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.registro.br/entity/71208516000174"
}
],
"objectClassName": "entity",
"publicIds": [
{
"identifier": "71.208.516/0001-74",
"type": "cnpj"
}
],
"roles": [
"registrant"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"kind",
{},
"text",
"org"
],
[
"fn",
{},
"text",
"ALGAR TELECOM S/A"
],
[
"adr",
{},
"text",
[
"",
"",
"",
"",
"",
"",
"BR"
]
]
]
]
},
{
"events": [
{
"eventAction": "registration",
"eventDate": "2006-04-17T12:00:00Z"
},
{
"eventAction": "last changed",
"eventDate": "2025-06-09T20:10:35Z"
}
],
"handle": "CNI15",
"objectClassName": "entity",
"roles": [
"technical"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"kind",
{},
"text",
"individual"
],
[
"fn",
{},
"text",
"CTBC - Núcleo de Aministração de IPs"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"lang",
{},
"language-tag",
"pt"
],
[
"adr",
{},
"text",
[
"",
"",
"",
"",
"",
"",
"BR"
]
]
]
]
}
],
"events": [
{
"eventAction": "registration",
"eventDate": "1996-12-10T11:00:00Z"
},
{
"eventAction": "last changed",
"eventDate": "2025-01-07T12:42:06Z"
},
{
"eventAction": "expiration",
"eventDate": "2027-12-10T11:00:00Z"
}
],
"handle": "ctbctelecom.com.br",
"ldhName": "ctbctelecom.com.br",
"links": [
{
"href": "https://rdap.registro.br/domain/ctbctelecom.com.br",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.registro.br/domain/ctbctelecom.com.br"
},
{
"href": "https://rdap.registro.br/domain/ctbctelecom.com.br?ticket=24685",
"rel": "archives",
"type": "application/rdap+json",
"value": "https://rdap.registro.br/domain/ctbctelecom.com.br"
}
],
"nameservers": [
{
"events": [
{
"eventAction": "delegation check",
"eventDate": "2026-11-03T08:00:23Z",
"status": [
"ns aa"
]
},
{
"eventAction": "last correct delegation check",
"eventDate": "2026-11-03T08:00:23Z"
}
],
"ldhName": "tricia.ns.cloudflare.com",
"objectClassName": "nameserver"
},
{
"events": [
{
"eventAction": "delegation check",
"eventDate": "2026-11-03T08:00:23Z",
"status": [
"ns aa"
]
},
{
"eventAction": "last correct delegation check",
"eventDate": "2026-11-03T08:00:23Z"
}
],
"ldhName": "yevgen.ns.cloudflare.com",
"objectClassName": "nameserver"
}
],
"notices": [
{
"description": [
"Copyright (c) Nic.br - Use of this data is governed by the Use and Privacy Policy. Distribution, commercialization, reproduction, and use for advertising or similar purposes are expressly prohibited.",
"2026-11-04T20:43:17-03:00 - 104.28.206.119"
],
"links": [
{
"href": "https://registro.br/upp",
"rel": "alternate",
"type": "text/html",
"value": "https://rdap.registro.br/domain/ctbctelecom.com.br"
}
],
"title": "Use and Privacy Policy"
}
],
"objectClassName": "domain",
"port43": "whois.registro.br",
"rdapConformance": [
"rdap_level_0",
"nicbr_level_0"
],
"secureDNS": {
"delegationSigned": false
},
"status": [
"active"
]
}Frequently asked questions
What is WHOIS?
WHOIS is a public directory that answers "who is responsible for this?" for domains, IP ranges and ASNs. It lists registration dates, the registrar, nameservers and contacts.
What is RDAP, and how does it differ?
RDAP is the modern replacement for WHOIS. It returns the same records in a structured, consistent format. We query RDAP first and fall back to classic WHOIS text when a registry has not adopted it yet.
What is the difference between a registrar and a registrant?
The registrar is the company you register and manage a domain through, such as xTom or GoDaddy. The registrant is the person or organization that actually holds the domain.
What are nameservers?
Nameservers answer DNS questions for a domain and decide which IP addresses the name resolves to. They also show which DNS provider the domain uses.
What is DNSSEC?
DNSSEC adds cryptographic signatures to DNS answers so they cannot be quietly altered in transit. "Signed" means the domain has it enabled, "unsigned" means it does not.
Why is the contact information redacted?
Privacy laws such as GDPR require registrars to hide most personal details in public records. The abuse contact is usually still shown, so a domain or network can be reported when something goes wrong.