`mail.letsopen.com`

	DNSSEC	⚠️ Not signed
	A	138.91.235.8^{🇺🇸 Microsoft138.91.0.0/16 MICROSOFT}

`letsopen.com`

	DNSSEC	⚠️ Not signed
	A	138.91.235.8^{🇺🇸 Microsoft138.91.0.0/16 MICROSOFT}
	NS	`dns23.hichina.com` ⭐
	NS	`dns24.hichina.com`
	MX	`hzmx01.mxmail.netease.com` ⭐
	MX	`hzmx02.mxmail.netease.com`⁽¹⁰⁾
	TXT	`google-site-verification=dHQYXCDScdAmWm0sWWENVheJlg10o-3Ud7AiR-QVN74`
	TXT	`google-site-verification=GR5YYEy2y4uAo2VNhI9daDr5A1ZoT0nkUOTzB-1_W2s`
	TXT	`v=spf1 include:spf.163.com ~all`
	SOA	`dns23.hichina.com`hostmaster@hichina.com 2026-01-09 #13

Previously MX for

letsopen.com

Same first word

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.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

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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.gov.ua

mail.net.ua

mail.com.au

mail.cat

mail.vin

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mail.ciao.jp

mail.gov.vc

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DNS History

6 records (1 active, 5 former)

○NSbuy.internettraffic.com2015-12-06 → 2016-07-11 · 4 obs

● 2015-12-06 02:31:48
● 2016-07-11 20:02:04
○ 2026-03-12 20:05:50
○ 2026-03-27 01:00:18

○NSsell.internettraffic.com2015-12-06 → 2016-07-11 · 4 obs

● 2015-12-06 02:31:48
● 2016-07-11 20:02:04
○ 2026-03-12 20:05:50
○ 2026-03-27 01:00:18

●A138.91.235.82026-03-12 → 2026-03-27 · 3 obs

○ 2016-07-11 20:02:04
● 2026-03-12 20:05:50
● 2026-03-27 01:00:18

○A69.172.201.1532016-07-11 → 2016-07-11 · 4 obs

○ 2016-03-13 11:59:42
● 2016-07-11 20:02:04
○ 2026-03-12 20:05:50
○ 2026-03-27 01:00:18

○A69.172.201.2082015-12-06 → 2016-03-13 · 5 obs

○ 2015-08-16 15:42:46
● 2015-12-06 02:31:48
● 2016-03-13 11:59:42
○ 2016-07-11 20:02:04
○ 2026-03-27 01:00:18

○A8.5.1.582015-08-16 → 2015-08-16 · 3 obs

● 2015-08-16 15:42:46
○ 2015-12-06 02:31:48
○ 2026-03-27 01:00:18

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	m.gtld-servers.net, l.gtld-servers.net, f.gtld-servers.net, d.gtld-servers.net...	-
letsopen.com	dns23.hichina.com, dns24.hichina.com	18 records

✅ Authoritative Response

Server:120.76.107.38

NS records: dns23.hichina.com, dns24.hichina.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for letsopen.com (unsigned zone)

⏱️ Timing

Total: 4305ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`138.91.235.8`

📌 Glue Records Collected

Total: 18

Out-of-bailiwick: 18 (dns23.hichina.com, dns23.hichina.com, dns23.hichina.com...)

Analysis

IP Addresses

mail.letsopen.com maps to IP address 138.91.235.8.

Other host names, for instance yomesorb.com, ciybio.com, letsopen.com, bioetp.net and cnccib.com share IP numbers with mail.letsopen.com.

mail.letsopen.com - robtex.com