`mail.courtesys.com`

DNSSEC	⚠️ Not signed
A	202.181.174.251^{🇭🇰 HKCIX-AS-AP202.181.174.0/24 Route Object for 202.181.174.0/24}
		PTR	`ns1.courtesys.com`

`courtesys.com`

	DNSSEC	⚠️ Not signed
	A	202.181.174.252^{🇭🇰 HKCIX-AS-AP202.181.174.0/24 Route Object for 202.181.174.0/24}
	NS	`ns1.courtesys.com` ⭐
	NS	`ns2.courtesys.com`
	MX	`mg1.cloudservices.com.hk` ⭐
	MX	`mg2.cloudservices.com.hk` ⭐
	TXT	`v=spf1 ip4:202.181.174.251 ip4:202.181.174.252 +mx ~all`
	TXT	`MS=028A312E43247FA71E6401A50621D06C8AC04E37`
	SOA	`ns1.courtesys.com`domain@courtesys.com 2025-11-04 #2

Previously MX for

courtesys.com

Same first word

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DNS History

2 records (1 active, 1 former)

○A114.112.243.2352015-05-25 → 2016-04-11 · 4 obs

● 2015-05-25 04:14:14
● 2016-04-11 09:08:04
○ 2026-02-15 01:49:34
○ 2026-04-14 06:18:00

●A202.181.174.2512026-02-15 → 2026-04-14 · 3 obs

○ 2016-04-11 09:08:04
● 2026-02-15 01:49:34
● 2026-04-14 06:18:00

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	k.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, l.gtld-servers.net...	-
courtesys.com	ns1.courtesys.com, ns2.courtesys.com	2 records

✅ Authoritative Response

Server:202.181.174.251

NS records: ns1.courtesys.com, ns2.courtesys.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for courtesys.com (unsigned zone)

⏱️ Timing

Total: 480ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`202.181.174.251`

📌 Glue Records Collected

Total: 2

In-bailiwick: 2 (ns1.courtesys.com, ns2.courtesys.com)

Analysis

IP Addresses

mail.courtesys.com points to a single IP address: 202.181.174.251.

Other host names such as sm1.courtesys.com, ns1.courtesys.com and mail.jennyschoice.com share IP numbers with mail.courtesys.com.

mail.courtesys.com - robtex.com