smtp.code4us.com - dns.ninja

`smtp.code4us.com`

DNSSEC	⚠️ Not signed
A	52.55.226.38^{🇺🇸 Amazon52.54.0.0/15 EC2 Region prefix}
		PTR	`ec2-52-55-226-38.compute-1.amazonaws.com`

`code4us.com`

	DNSSEC	⚠️ Not signed
	A	192.169.190.220^{🇺🇸 AS398101192.169.188.0/22}
	NS	`ns1.dicianu.com` ⭐
	NS	`ns2.dicianu.com`
	NS	`ns3.dicianu.com`
	MX	`mail.code4us.com` ⭐
	MX	`smtp.code4us.com`⁽²⁰⁾
	TXT	`v=spf1 a mx ptr mx:code4us.com include:secureserver.net ~all`
	SOA	`ns1.dicianu.com`dragos@dicianu.com 2006-09-10 #22

⚠️ On DNS blocklist: light, multi, popupads, pro, pro.mini, pro.plus, pro.plus.mini, ultimate, ultimate.mini

MX for

code4us.com

Same first word

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smtp.fun

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smtp.edu.ee

smtp.j.layershift.co.uk

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smtp.guru

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pmts.dk

mspt.com

mpst.at

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stmp.se

mspt.xyz

sptm.dk

spmt.ru

pstm.com

stmp.in

mtps.me

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stpm.co.uk

pmst.com

tpms.by

ptsm.co.kr

spmt.eu

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mtps.nl

tmps.com

sptm.co.uk

mtsp.hl.cn

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tsmp.us

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tpms.edu.hk

sptm.cn

pmst.net

stmp.si

mpts.ca

tpms.in

tsmp.org

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smpt.gov.ly

mpst.org

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mspt.cn

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spmt.be

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psmt.vn

DNS History

2 records (1 active, 1 former)

●A52.55.226.382026-02-15 → 2026-08-02 · 3 obs

○ 2016-06-22 19:14:14
● 2026-02-15 21:46:16
● 2026-08-02 22:50:40

○A72.167.142.2252015-06-16 → 2016-06-22 · 4 obs

● 2015-06-16 05:16:24
● 2016-06-22 19:14:14
○ 2026-02-15 21:46:16
○ 2026-08-02 22:50:40

🔍 DNS Trace

Analysis

Mail Server Role

The mail server smtp.code4us.com processes email for code4us.com.

As mail servers, mail.code4us.com and smtp.code4us.com are regularly found together.

IP Addresses

smtp.code4us.com resolves to just one IP address, 52.55.226.38.

Two other host names, along with smtp.myemailtracking.com, ec2-52-55-226-38.compute-1.amazonaws.com and www.nationaltm.com, also share IP numbers with smtp.code4us.com.