`mail.excel.engineering`

	DNSSEC	⚠️ Not signed
	A	2600:3c00::f03c:92ff:fe3e:58d4^{🇺🇸 AKAMAI-LINODE-AP2600:3c00::/32 Akamai Technologies}
	A	104.237.136.74^{🇺🇸 AKAMAI-LINODE-AP104.237.136.0/21 Akamai Technologies}

`excel.engineering`

	DNSSEC	⚠️ Not signed
	A	2600:3c00::f03c:92ff:fe3e:58d4^{🇺🇸 AKAMAI-LINODE-AP2600:3c00::/32 Akamai Technologies}
	A	104.237.136.74^{🇺🇸 AKAMAI-LINODE-AP104.237.136.0/21 Akamai Technologies}
	NS	`ns1.linode.com` ⭐
	NS	`ns2.linode.com`
	NS	`ns3.linode.com`
	NS	`ns4.linode.com`
	NS	`ns5.linode.com`
	MX	`excel-engineering.mail.protection.outlook.com` ⭐
	MX	`mail.excel.engineering`⁽¹⁰⁾
	TXT	`v=spf1 include:spf.protection.outlook.com -all`
	TXT	`google-site-verification=wynOvMdyDEtcvlPP-Gyd9-dG4ICy_rtiuCGuISHYqoM`
	TXT	`MS=ms77506817`
	SOA	`ns1.linode.com`gilley\@lee.gmail.com serial=2021000013

MX for

excel.engineering

Same first word

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DNS History

2 records (2 active, 0 former)

●A104.237.136.742026-05-02 → 2026-05-13 · 2 obs

● 2026-05-02 07:55:50
● 2026-05-13 04:38:54

●A2600:3c00::f03c:92ff:fe3e:58d42026-05-02 → 2026-05-13 · 2 obs

● 2026-05-02 07:55:50
● 2026-05-13 04:38:54

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
engineering	v0n0.nic.engineering, v0n1.nic.engineering, v0n2.nic.engineering, v0n3.nic.engineering...	12 records
excel.engineering	ns1.linode.com, ns2.linode.com, ns4.linode.com, ns3.linode.com...	-

✅ Authoritative Response

Server:92.123.95.4

NS records: ns1.linode.com, ns2.linode.com, ns4.linode.com, ns3.linode.com, ns5.linode.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for excel.engineering (unsigned zone)

⏱️ Timing

Total: 1535ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`104.237.136.74`
AAAA	1	`2600:3c00::f03c:92ff:fe3e:58d4`

📌 Glue Records Collected

Total: 12

In-bailiwick: 12 (v0n0.nic.engineering, v0n0.nic.engineering, v0n1.nic.engineering...)

Analysis

Mail Server Role

mail.excel.engineering serves as the mail server for excel.engineering.

Together with mail.excel.engineering, excel-engineering.mail.protection.outlook.com is commonly used as a mail server.

IP Addresses

mail.excel.engineering resolves to two IP numbers: 2600:3c00::f03c:92ff:fe3e:58d4 and 104.237.136.74.

Other host names share IP numbers with mail.excel.engineering; for instance excel.engineering.

mail.excel.engineering - robtex.com