`mail.oscfirst.com`

CNAME	`mail24419.maychuemail.com`
DNSSEC	⚠️ Not signed
A	123.30.244.19^{🇻🇳 VDC123.30.244.0/24 VNPT}
		PTR	`mail24419.maychuemail.com`
		PTR	`079999.static.maychudns.com`

`oscfirst.com`

	DNSSEC	⚠️ Not signed
	A	112.213.89.150^{🇻🇳 SUPERDATA112.213.89.0/24 Vietnam Internet Network Information Center (VNNIC) 18 Nguyen Du Str, Hai Ba Trung District, Hanoi City, Vietnam 24th floor, VNTA Tower, Duong Dinh Nghe, Cau Giay, Hanoi}
	NS	`nsbak.pavietnam.net` ⭐
	NS	`ns1.pavietnam.vn`
	NS	`ns2.pavietnam.vn`
	MX	`mail24419.maychuemail.com` ⭐
	MX	`mx9219.maychuemail.net`⁽¹⁰⁾
	TXT	`v=spf1 +a +mx +ip4:112.213.92.19 +ip4:123.30.244.19 ~all`
	SOA	`nsbak.pavietnam.net`hostmaster@oscfirst.com 2023-10-21 #23

Previously MX for

oscfirst.com

Same first word

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DNS History

3 records (1 active, 2 former)

○A112.213.92.192015-07-03 → 2016-07-15 · 5 obs

○ 2008-03-14 06:45:16
● 2015-07-03 01:46:00
● 2016-07-15 21:55:18
○ 2026-05-09 18:11:40
○ 2026-05-09 18:11:44

○A67.15.23.1062008-03-14 → 2008-03-14 · 3 obs

● 2008-03-14 06:45:16
○ 2015-07-03 01:46:00
○ 2026-05-09 18:11:44

●CNAMEmail24419.maychuemail.com2026-05-09 → 2026-05-09 · 2 obs

● 2026-05-09 18:11:40
● 2026-05-09 18:11:44

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net...	-
oscfirst.com	nsbak.pavietnam.net, ns1.pavietnam.vn, ns2.pavietnam.vn	-

✅ Authoritative Response

Server:112.213.89.22

NS records: nsbak.pavietnam.net, ns1.pavietnam.vn, ns2.pavietnam.vn

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for oscfirst.com (unsigned zone)

⏱️ Timing

Total: 1762ms | Queries: -

📄 Records

Type	Count	Sample Data
CNAME	1	`mail24419.maychuemail.com`

Analysis

IP Addresses

mail.oscfirst.com points to a single IP: 123.30.244.19.

Other host names, for instance mail.tpmvietnam.com, 079999.static.maychudns.com and mail24419.maychuemail.com share IP numbers with mail.oscfirst.com.

mail.oscfirst.com - robtex.com