`mail.cotel.nl`

DNSSEC	⚠️ Not signed
A	2a01:1b0:7999:402::12^{🇳🇱 DUOCAST-AS2a01:1b0::/32 Duocast}
		PTR	`neptune.exsilia.net`
A	83.137.145.12^{🇳🇱 DUOCAST-AS83.137.144.0/21 Duocast}

`cotel.nl`

	DNSSEC	🔒 Signed (DS record present)
	A	2a01:1b0:7999:402::12^{🇳🇱 DUOCAST-AS2a01:1b0::/32 Duocast}
	A	83.137.145.12^{🇳🇱 DUOCAST-AS83.137.144.0/21 Duocast}
	NS	`ns1.exsilia.net` ⭐
	NS	`ns2.exsilia.net`
	MX	`neptune.exsilia.net` ⭐
	TXT	`v=spf1 include:_spf.exsilia.net include:_spf.google.com +a +mx ~all`
	SOA	`ns1.exsilia.net`gerard@cotel.nl 2021-03-23 #1

Previously MX for

cotel.nl

Same first word

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Similar names

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DNS History

2 records (2 active, 0 former)

●A2a01:1b0:7999:402::122015-05-23 → 2026-07-20 · 2 obs

● 2015-05-23 04:34:24
● 2026-07-20 16:26:42

●A83.137.145.122015-05-23 → 2026-07-20 · 2 obs

● 2015-05-23 04:34:24
● 2026-07-20 16:26:42

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
nl	ns3.dns.nl, ns1.dns.nl, ns4.dns.nl	-
cotel.nl	ns1.exsilia.net, ns2.exsilia.net	-

✅ Authoritative Response

Server:91.209.7.53

NS records: ns1.exsilia.net, ns2.exsilia.net

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 585ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`83.137.145.12`
AAAA	1	`2a01:1b0:7999:402::12`

Analysis

IP Addresses

mail.cotel.nl resolves to the IP addresses 83.137.145.12 and 2a01:1b0:7999:402::12

bodini.be, pcop.nl, vanille.eu and two other host names share IP numbers with mail.cotel.nl.

mail.cotel.nl - robtex.com

mail.cotel.nl

cotel.nl