`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 2026-05-28 #9

Previously MX for

letsopen.com

Same first word

mail.gr

mail.srv.br

mail.dyn-vpn.de

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mail.gov.cn

mail.staba.jp

mail.pinoko.jp

mail.in.th

mail.insure

mail.tech

mail.rakkestad.no

mail.gov.bm

mail.com.py

mail.guru

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mail.babyblue.jp

mail.in-berlin.de

mail.no-ip.biz

mail.host

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mail.collegefan.org

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mail.cab

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mail.lat

mail.mg.gov.br

mail.kiev.ua

mail.mydns.tw

mail.report

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mail.blogspot.com

mail.gob.bo

mail.dnsfor.me

mail.dix.asia

mail.gov.nr

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mail.hr

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mail.(0x7075737379)cat.jp

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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
○ 2026-07-01 15:28:24

○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
○ 2026-07-01 15:28:24

●A138.91.235.82026-03-12 → 2026-07-01 · 3 obs

○ 2016-07-11 20:02:04
● 2026-03-12 20:05:50
● 2026-07-01 15:28:24

○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
○ 2026-07-01 15:28:24

○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
○ 2026-07-01 15:28:24

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

● 2015-08-16 15:42:46
○ 2015-12-06 02:31:48
○ 2026-07-01 15:28:24

🔍 DNS Trace

📋 Delegation Chain

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

✅ Authoritative Response

Server:120.76.107.40

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for letsopen.com (unsigned zone)

⏱️ Timing

Total: 3964ms | 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 resolves to just one IP address, 138.91.235.8.

Two other host names, along with yomesorb.com, ciybio.com and letsopen.com, also share IP numbers with mail.letsopen.com.

mail.letsopen.com - dns.ninja