cotran.com - dns.ninja

`cotran.com`

DNSSEC	⚠️ Not signed
NS	`dns19.hichina.com` ⭐
		A	2408:4009:501::27^{🇨🇳 Alibaba-Cloud2408:4009:501::/48}
		A	39.96.153.40^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	39.96.153.60^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	47.118.199.200^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	47.118.199.220^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	120.76.107.40^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	120.76.107.60^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	139.224.142.100^{🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
		A	139.224.142.110^{🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
NS	`dns20.hichina.com`
		A	2408:4009:501::28^{🇨🇳 Alibaba-Cloud2408:4009:501::/48}
		A	39.96.153.38^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	39.96.153.61^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	47.118.199.198^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	47.118.199.222^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	120.76.107.38^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	120.76.107.61^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	139.224.142.98^{🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
		A	139.224.142.108^{🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
MX	`mx1.feishu.cn` ⭐
		A	52.220.106.220^{🇸🇬 Amazon52.220.0.0/15 SIN prefix}
			PTR	`ec2-52-220-106-220.ap-southeast-1.compute.amazonaws.com`
MX	`mx2.feishu.cn`⁽⁵⁾
		A	101.126.58.225^{🇨🇳 VOLCANO-ENGINE101.126.56.0/21 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
		A	122.14.229.0^{🇨🇳 CHINAMOBILE-CN122.14.224.0/20}
MX	`mx3.feishu.cn`⁽¹⁰⁾
		A	52.220.106.220^{🇸🇬 Amazon52.220.0.0/15 SIN prefix}
			PTR	`ec2-52-220-106-220.ap-southeast-1.compute.amazonaws.com`
		A	101.126.58.225^{🇨🇳 VOLCANO-ENGINE101.126.56.0/21 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
		A	122.14.229.0^{🇨🇳 CHINAMOBILE-CN122.14.224.0/20}
TXT	`202203211725510gjiz7xctap5id5cey991hpdiplgi6o0bl8e4kpjdl1s7a5398`
TXT	`v=spf1 +include:_netblocks.m.feishu.cn -all`
SOA	`dns19.hichina.com`hostmaster@hichina.com 2026-05-28 #9

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1783161536

Subdomains

www.cotran.com

Same first word

cotran.kr

cotran.de

cotran.com.br

cotran.eu

cotran.ca

cotran.fr

cotran.net

cotran.com

cotran.it

Similar names

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contra.biz

contra.st

tracon.in

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craton.com.br

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ontrac.company

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contra.in

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craton.spb.ru

cantor.com

carton.tv

contra.es

contra.co.il

ontrac.network

cantor.ch

tracon.es

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contra.codes

noctra.com

carton.co.jp

artcon.eu

actron.cl

artcon.ca

ancort.ru

arcont.it

tranco.co.uk

contra.sg

contra.com.tr

ontrac.agency

ontrac.careers

conrat.info

carton.it

tracon.com.br

cantor.systems

toncar.de

cantor.co

tranco.es

tancor.info

craton.s3.amazonaws.com

ontrac.international

artnoc.com.br

contra.dk

ontrac.org

contar.eu

noctar.click

contra.eu

catron.de

tranco.org

arntco.com

actron.com.ph

contra.sk

catron.net

artcon.net

contra.co

conart.ro

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contra.tokyo

DNS History

11 records (5 active, 6 former)

●NSdns19.hichina.com2026-03-13 → 2026-07-04 · 3 obs

○ 2018-01-02 20:51:32
● 2026-03-13 07:27:18
● 2026-07-04 11:05:54

●NSdns20.hichina.com2026-03-13 → 2026-07-04 · 3 obs

○ 2018-01-02 20:51:32
● 2026-03-13 07:27:18
● 2026-07-04 11:05:54

○NSns73.worldnic.com2015-11-07 → 2018-01-02 · 4 obs

● 2015-11-07 10:31:54
● 2018-01-02 20:51:32
○ 2026-03-13 07:27:18
○ 2026-07-04 11:05:54

○NSns74.worldnic.com2015-11-07 → 2018-01-02 · 4 obs

● 2015-11-07 10:31:54
● 2018-01-02 20:51:32
○ 2026-03-13 07:27:18
○ 2026-07-04 11:05:54

○MXmail.b-io.co2015-06-24 → 2015-06-24 · 3 obs

● 2015-06-24 18:27:18
○ 2015-11-07 10:31:54
○ 2026-07-04 11:05:54

●MXmx1.feishu.cn2026-03-13 → 2026-07-04 · 3 obs

○ 2018-01-02 20:51:32
● 2026-03-13 07:27:18
● 2026-07-04 11:05:54

●MXmx2.feishu.cn2026-03-13 → 2026-07-04 · 3 obs

○ 2018-01-02 20:51:32
● 2026-03-13 07:27:18
● 2026-07-04 11:05:54

●MXmx3.feishu.cn2026-03-13 → 2026-07-04 · 3 obs

○ 2018-01-02 20:51:32
● 2026-03-13 07:27:18
● 2026-07-04 11:05:54

○MXp.webcom.ctmail.com2016-02-04 → 2018-01-02 · 5 obs

○ 2015-11-07 10:31:54
● 2016-02-04 03:24:12
● 2018-01-02 20:51:32
○ 2026-03-13 07:27:18
○ 2026-07-04 11:05:54

○A205.178.189.1292015-11-07 → 2018-01-02 · 5 obs

○ 2015-06-24 18:27:18
● 2015-11-07 10:31:54
● 2018-01-02 20:51:32
○ 2026-03-13 07:27:18
○ 2026-07-04 11:05:54

○A208.91.197.1322015-06-24 → 2015-06-24 · 3 obs

● 2015-06-24 18:27:18
○ 2015-11-07 10:31:54
○ 2026-07-04 11:05:54

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net...	-
cotran.com	dns19.hichina.com, dns20.hichina.com	18 records

✅ Authoritative Response

Server:120.76.107.40

NS records: dns19.hichina.com, dns20.hichina.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for cotran.com (unsigned zone)

⏱️ Timing

Total: 887ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	2	`dns20.hichina.com, dns19.hichina.com`
MX	3	`mx3.feishu.cn (pri: 10), mx1.feishu.cn (pri: 1)...`
TXT	2	`v=spf1 +include:_netblocks.m.feishu.cn -, 202203211725510gjiz7xctap5id5cey991hpdip`
SOA	1	`dns19.hichina.com hostmaster.hichina.com`

📌 Glue Records Collected

Total: 18

Out-of-bailiwick: 18 (dns19.hichina.com, dns19.hichina.com, dns19.hichina.com...)

Analysis

Hierarchy

cotran.com is a parent domain of www.cotran.com.

Name Servers

cotran.com has two authoritative name servers — dns19.hichina.com and dns20.hichina.com.

cotran.com shares its name server setup with other domains, including ft-work.cn, china-air-curtain.com, fairskygroup.com and two others.

cotran.com shares at least some of its name servers with other domains, including kyushu.cn, eaglexp.cn, cqutp.org and two others.

These name servers are frequently seen alongside the name servers ns1.alidns.com, ns2.alidns.com, ns7.alidns.com and ns8.alidns.com.

Host names with 9 IP numbers:

dns19.hichina.com points to 39.96.153.40, 39.96.153.60, 47.118.199.200 and 6 other IP addresses.

dns20.hichina.com points to 39.96.153.38, 39.96.153.61, 47.118.199.198 and 6 other IP addresses.

Mail Servers

cotran.com is handled by three mail servers: mx1.feishu.cn, mx2.feishu.cn and mx3.feishu.cn.

cotran.com shares mail servers — at least in part — with other domains, including allcomesfromnothing.com, fooodlab.com, abovegenius.com and two others.

Host names with three IP numbers:

mx3.feishu.cn resolves to 52.220.106.220, 101.126.58.225 and 122.14.229.0.

Host names with two IP numbers:

mx2.feishu.cn resolves to 101.126.58.225 and 122.14.229.0.

Host names pointing to a single IP address:

mx1.feishu.cn resolves to 52.220.106.220.

The host names mx3.feishu.cn and mx1.feishu.cn both resolve to 52.220.106.220 IP addresses.

The host names mx3.feishu.cn and mx2.feishu.cn both resolve to 101.126.58.225 IP addresses.

The host names mx3.feishu.cn and mx2.feishu.cn both resolve to 122.14.229.0 IP addresses.