`mail.51cool.com`

CNAME	`ym.163.com`
DNSSEC	⚠️ Not signed
A	111.124.200.33^{🇨🇳 CHINANET-Guizhou-Guian-IDC111.124.192.0/19}
MX	`mx.ym.163.com` ⭐
		A	111.124.200.35^{🇨🇳 CHINANET-Guizhou-Guian-IDC111.124.192.0/19}
TXT	`qqmail-site-verification=7257b73e190ad942c0f4062f33fe2cbd8e932e6798f`
TXT	`v=spf1 include:spf.163.com -all`

`51cool.com`

	DNSSEC	⚠️ Not signed
	NS	`ns17.xincache.com` ⭐
	NS	`ns18.xincache.com`
	MX	`mx.ym.163.com` ⭐
	TXT	`v=spf1 include:spf.163.com ~all`
	SOA	`ns17.xincache.com`enterprise1dnsadmin@dnspod.com serial=1576631645

Previously MX for

51cool.com

Same first word

mail.com.ph

mail.co.ua

mail.bike

mail.gr

mail.srv.br

mail.dyn-vpn.de

mail.serveminecraft.net

mail.gov.cn

mail.staba.jp

mail.pinoko.jp

mail.in.th

mail.tech

mail.rakkestad.no

mail.gov.bm

mail.com.py

mail.guru

mail.bing

mail.lv

mail.babyblue.jp

mail.in-berlin.de

mail.no-ip.biz

mail.host

mail.net.ar

mail.management

mail.qld.gov.au

mail.pm

mail.wf

mail.ltd

mail.com.pe

mail.marketing

mail.velvet.jp

mail.fage

mail.coach

mail.abbott

mail.weir

mail.wroclaw.pl

mail.et

mail.za.net

mail.bz

mail.fakefur.jp

mail.sb

mail.ht

mail.ax

mail.spdns.eu

mail.collegefan.org

mail.com.cn

mail.cab

mail.vn.ua

mail.lat

mail.mg.gov.br

mail.kiev.ua

mail.mydns.tw

mail.report

mail.fail

mail.gov.ee

mail.blogspot.com

mail.gob.bo

mail.dnsfor.me

mail.dix.asia

mail.gov.nr

mail.sg

mail.eu.com

mail.camp

mail.nic.za

mail.pink

mail.vg

mail.guide

mail.chips.jp

mail.info

mail.simplesite.com

mail.gw

mail.tv

mail.jellybean.jp

mail.eg

mail.chu.jp

mail.gov.la

mail.sub.jp

mail.co.ro

mail.com.sg

mail.kikirara.jp

mail.mydns.jp

mail.hr

mail.gov.tn

mail.pb.gov.br

mail.oops.jp

mail.eu

mail.(0x7075737379)cat.jp

mail.tm

mail.boo.jp

mail.co.za

mail.zp.ua

mail.ac.me

mail.info.at

mail.nis.za

mail.mysecuritycamera.org

mail.gov.ua

mail.net.ua

mail.com.au

mail.cat

mail.vin

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mail.partners

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almi.wtf

DNS History

6 records (1 active, 5 former)

○MXmx.ym.163.com2015-10-29 → 2016-04-11 · 4 obs

● 2015-10-29 17:21:26
● 2016-04-11 10:23:06
○ 2026-05-13 11:32:54
○ 2026-05-13 11:32:58

○A123.58.177.512015-10-29 → 2016-04-11 · 5 obs

○ 2015-06-16 05:44:32
● 2015-10-29 17:21:26
● 2016-04-11 10:23:06
○ 2026-05-13 11:32:54
○ 2026-05-13 11:32:58

○A123.58.178.1112015-06-16 → 2015-06-16 · 4 obs

○ 2008-03-20 04:01:34
● 2015-06-16 05:44:32
○ 2026-05-13 11:32:54
○ 2026-05-13 11:32:58

○A123.58.178.1122015-06-16 → 2015-06-16 · 4 obs

○ 2008-03-20 04:01:34
● 2015-06-16 05:44:32
○ 2026-05-13 11:32:54
○ 2026-05-13 11:32:58

○A58.215.64.1702008-03-20 → 2008-03-20 · 3 obs

● 2008-03-20 04:01:34
○ 2015-06-16 05:44:32
○ 2026-05-13 11:32:58

●CNAMEym.163.com2015-06-16 → 2026-05-13 · 3 obs

○ 2008-03-20 04:01:34
● 2015-06-16 05:44:32
● 2026-05-13 11:32:58

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
51cool.com	ns17.xincache.com, ns18.xincache.com	12 records

✅ Authoritative Response

Server:1.12.0.4

NS records: ns17.xincache.com, ns18.xincache.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 51cool.com (unsigned zone)

⏱️ Timing

Total: 111ms | Queries: -

📄 Records

Type	Count	Sample Data
CNAME	1	`ym.163.com`

📌 Glue Records Collected

Total: 12

Out-of-bailiwick: 12 (ns17.xincache.com, ns17.xincache.com, ns17.xincache.com...)

Analysis

IP Addresses

mail.51cool.com points to a single IP address: 111.124.200.33.

Other host names, such as ym.163.com and mail.ym.ntes53.netease.com, share IP numbers with mail.51cool.com.

Mail Servers

The mx.ym.163.com mail server handles mail.51cool.com.

mail.51cool.com shares the same mail server setup as other domains, including shellwin.com, huosu.com.cn, zhenxiadianqi.com, centralsoft.com.cn and cngyat.com.

mail.51cool.com shares at least partially some mail servers with other domains, for instance dtkcn.com, gretech.com.cn, jxrczp.com, chinait.com.cn and ijidi.cn.

mx.ym.163.com points to a single IP number: 111.124.200.35.

mail.51cool.com - robtex.com

mail.51cool.com

51cool.com