cotbc.com.br - dns.ninja

`cotbc.com.br`

DNSSEC	⚠️ Not signed
A	186.202.153.10^{🇧🇷 Locaweb186.202.152.0/22 Servicos de Internet SA}
		PTR	`hm6332.locaweb.com.br`
NS	`ns1.locaweb.com.br` ⭐
		A	2804:218:7000:0:186:202:8:254^{🇧🇷 Locaweb2804:218:7000::/48}
		A	186.202.8.254^{🇧🇷 Locaweb186.202.8.0/24 Servicos de Internet SA}
NS	`ns2.locaweb.com.br`
		A	2804:218:7001:0:187:45:248:254^{🇧🇷 Locaweb2804:218:7001::/48}
		A	187.45.248.254^{🇧🇷 Locaweb187.45.248.0/24 Servicos de Internet SA}
NS	`ns3.locaweb.com.br`
		A	2804:218:7002:0:189:126:101:254^{🇧🇷 Locaweb2804:218:7002::/48}
		A	189.126.101.254^{🇧🇷 Locaweb189.126.101.0/24 Servicos de Internet SA}
MX	`mx.core.locaweb.com.br` ⭐
		A	177.153.23.241^{🇧🇷 Locaweb177.153.0.0/19 Servicos de Internet SA}
			PTR	`mx.core.locaweb.com.br`
MX	`mx.a.locaweb.com.br`⁽²⁰⁾
		A	186.202.4.42^{🇧🇷 Locaweb186.202.0.0/19 Servicos de Internet SA}
			PTR	`mx.a.locaweb.com.br`
MX	`mx.b.locaweb.com.br`⁽²⁰⁾
		A	177.153.23.242^{🇧🇷 Locaweb177.153.0.0/19 Servicos de Internet SA}
			PTR	`mx.b.locaweb.com.br`
MX	`mx.jk.locaweb.com.br`⁽²⁰⁾
		A	200.234.204.130^{🇧🇷 Locaweb200.234.192.0/20 Servicos de Internet SA}
			PTR	`mx.jk.locaweb.com.br`
TXT	`v=spf1 include:_spf.locaweb.com.br ?all`
SOA	`ns1.locaweb.com.br`hostmaster@locaweb.com.br 2022-03-10 #1

`com.br`

	DNSSEC	⚠️ Not signed
	NS	`a.dns.br` ⭐ ⚠️ Not in parent delegation
	NS	`b.dns.br` ⚠️ Not in parent delegation
	NS	`c.dns.br` ⚠️ Not in parent delegation
	NS	`d.dns.br` ⚠️ Not in parent delegation
	NS	`e.dns.br` ⚠️ Not in parent delegation
	NS	`f.dns.br` ⚠️ Not in parent delegation
	SOA	`a.dns.br`hostmaster@registro.br serial=2026180008

rank #523832 globally
rank #3883 in the tld
WOT: SAFE (69/100)

Same first word

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cotbc.org

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DNS History

15 records (8 active, 7 former)

●NSns1.locaweb.com.br2020-01-12 → 2026-06-29 · 3 obs

○ 2017-01-01 14:41:42
● 2020-01-12 19:17:46
● 2026-06-29 00:43:24

○NSns1.nomer.com.br2015-07-13 → 2016-04-24 · 4 obs

● 2015-07-13 18:13:28
● 2016-04-24 22:19:24
○ 2017-01-01 14:41:42
○ 2026-06-29 00:43:24

●NSns2.locaweb.com.br2020-01-12 → 2026-06-29 · 3 obs

○ 2017-01-01 14:41:42
● 2020-01-12 19:17:46
● 2026-06-29 00:43:24

○NSns2.nomer.com.br2015-07-13 → 2016-04-24 · 4 obs

● 2015-07-13 18:13:28
● 2016-04-24 22:19:24
○ 2017-01-01 14:41:42
○ 2026-06-29 00:43:24

●NSns3.locaweb.com.br2020-01-12 → 2026-06-29 · 3 obs

○ 2017-01-01 14:41:42
● 2020-01-12 19:17:46
● 2026-06-29 00:43:24

○NSns3.nomer.com.br2015-07-13 → 2016-04-24 · 4 obs

● 2015-07-13 18:13:28
● 2016-04-24 22:19:24
○ 2017-01-01 14:41:42
○ 2026-06-29 00:43:24

●MXmx.a.locaweb.com.br2020-01-12 → 2026-06-29 · 3 obs

○ 2017-01-01 14:41:42
● 2020-01-12 19:17:46
● 2026-06-29 00:43:24

●MXmx.b.locaweb.com.br2020-01-12 → 2026-06-29 · 3 obs

○ 2017-01-01 14:41:42
● 2020-01-12 19:17:46
● 2026-06-29 00:43:24

●MXmx.core.locaweb.com.br2020-01-12 → 2026-06-29 · 3 obs

○ 2017-01-01 14:41:42
● 2020-01-12 19:17:46
● 2026-06-29 00:43:24

●MXmx.jk.locaweb.com.br2020-01-12 → 2026-06-29 · 3 obs

○ 2017-01-01 14:41:42
● 2020-01-12 19:17:46
● 2026-06-29 00:43:24

○MXspmexp-mx-01.dualtec.com.br2015-07-13 → 2016-04-24 · 4 obs

● 2015-07-13 18:13:28
● 2016-04-24 22:19:24
○ 2017-01-01 14:41:42
○ 2026-06-29 00:43:24

○MXspmexp-mx-02.dualtec.com.br2015-07-13 → 2016-04-24 · 4 obs

● 2015-07-13 18:13:28
● 2016-04-24 22:19:24
○ 2017-01-01 14:41:42
○ 2026-06-29 00:43:24

○MXspmexp-mx-03.dualtec.com.br2015-07-13 → 2016-04-24 · 4 obs

● 2015-07-13 18:13:28
● 2016-04-24 22:19:24
○ 2017-01-01 14:41:42
○ 2026-06-29 00:43:24

●A186.202.153.102020-01-12 → 2026-06-29 · 3 obs

○ 2017-01-01 14:41:42
● 2020-01-12 19:17:46
● 2026-06-29 00:43:24

○A200.169.101.172015-07-13 → 2016-04-24 · 4 obs

● 2015-07-13 18:13:28
● 2016-04-24 22:19:24
○ 2017-01-01 14:41:42
○ 2026-06-29 00:43:24

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
br	a.dns.br, b.dns.br, c.dns.br, d.dns.br...	-
cotbc.com.br	ns1.locaweb.com.br, ns2.locaweb.com.br, ns3.locaweb.com.br	6 records

✅ Authoritative Response

Server:186.202.8.254

NS records: ns1.locaweb.com.br, ns2.locaweb.com.br, ns3.locaweb.com.br

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for cotbc.com.br (unsigned zone)

⏱️ Timing

Total: 786ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`186.202.153.10`
NS	3	`ns2.locaweb.com.br, ns3.locaweb.com.br...`
MX	4	`mx.b.locaweb.com.br (pri: 20), mx.jk.locaweb.com.br (pri: 20)...`
TXT	1	`v=spf1 include:_spf.locaweb.com.br ?all`
SOA	1	`ns1.locaweb.com.br hostmaster.locaweb.co`

📌 Glue Records Collected

Total: 6

Out-of-bailiwick: 6 (ns1.locaweb.com.br, ns2.locaweb.com.br, ns3.locaweb.com.br...)

Analysis

IP Addresses

cotbc.com.br resolves to just one IP address, 186.202.153.10.

Two other host names, along with emeaga.com.br, cellarimobiliaria.com.br and losinox.com.br, also share IP numbers with cotbc.com.br.

Name Servers

cotbc.com.br has three name servers — ns1.locaweb.com.br, ns2.locaweb.com.br and ns3.locaweb.com.br.

cotbc.com.br has at least partial name server overlap with other domains, such as minhacamera.com, completinha.com.br, sorria.dentalprev.com.br and two others.

Each of ns1.locaweb.com.br, ns2.locaweb.com.br and ns3.locaweb.com.br points to two IP numbers. ns1.locaweb.com.br points to 186.202.8.254 and 2804:218:7000:0:186:202:8:254. ns2.locaweb.com.br points to 187.45.248.254 and 2804:218:7001:0:187:45:248:254. ns3.locaweb.com.br points to 189.126.101.254 and 2804:218:7002:0:189:126:101:254.

Mail Servers

cotbc.com.br has four mail servers: mx.a.locaweb.com.br, mx.b.locaweb.com.br, mx.core.locaweb.com.br and mx.jk.locaweb.com.br.

There is at least a partial MX overlap between cotbc.com.br and other domains, including winetecnologia.com.br, proclinic.com.br, imobiliarianewcenter.com.br and two others.

The hosts mx.a.locaweb.com.br, mx.b.locaweb.com.br, mx.core.locaweb.com.br and mx.jk.locaweb.com.br all resolve to exactly one IP address each: 186.202.4.42, 177.153.23.242, 177.153.23.241 and 200.234.204.130 respectively.