`mail.21firstst.com`

DNSSEC	⚠️ Not signed
A	20.191.209.39^{🇦🇺 Microsoft20.184.0.0/13 MICROSOFT}
		PTR	`sm-01.expeed.com.au`

`21firstst.com`

	DNSSEC	⚠️ Not signed
	A	20.53.91.99^{🇦🇺 Microsoft20.48.0.0/12}
	NS	`dns01.expeed.com.au` ⭐ ⚠️ Not in parent delegation
	NS	`dns02.expeed.com.au` ⚠️ Not in parent delegation
	NS	`ns1.21firstst.com` ⚠️ Not in zone NS records
	NS	`ns2.21firstst.com` ⚠️ Not in zone NS records
	MX	`mail.21firstst.com` ⭐
	TXT	`v=spf1 +a +mx +a:plesk-win-04.expeed.com.au -all`
	SOA	`dns01.expeed.com.au`coco21firstst@yahoo.com 2026-03-18 #1

WOT: SAFE (61/100)
WOT: UNKNOWN (64/100)

MX for

21firstst.com

Same first word

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DNS History

3 records (1 active, 2 former)

○A103.4.212.22016-07-11 → 2016-08-10 · 5 obs

○ 2016-03-09 15:18:36
● 2016-07-11 08:11:26
● 2016-08-10 05:53:02
○ 2026-03-26 17:09:32
○ 2026-04-22 23:21:00

●A20.191.209.392026-03-26 → 2026-04-22 · 3 obs

○ 2016-08-10 05:53:02
● 2026-03-26 17:09:32
● 2026-04-22 23:21:00

○A65.182.102.902015-07-18 → 2016-03-09 · 4 obs

● 2015-07-18 05:59:52
● 2016-03-09 15:18:36
○ 2016-07-11 08:11:26
○ 2026-04-22 23:21:00

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
21firstst.com	ns1.21firstst.com, ns2.21firstst.com	2 records

✅ Authoritative Response

Server:20.53.91.99

NS records: ns1.21firstst.com, ns2.21firstst.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 21firstst.com (unsigned zone)

⏱️ Timing

Total: 437ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`20.191.209.39`

📌 Glue Records Collected

Total: 2

In-bailiwick: 2 (ns1.21firstst.com, ns2.21firstst.com)

Analysis

Mail Server Role

mail.21firstst.com functions as a mail server for 21firstst.com.

IP Addresses

mail.21firstst.com resolves to one IP number: 20.191.209.39.

other host names including mail.scjja.com, mail.dentaledgeit.com.au, mail.decisionz.com, mail.whichplantwhere.com.au and mail.airsports.com.au share IP numbers with mail.21firstst.com.

mail.21firstst.com - robtex.com