`mail1.serczer.pl`

DNSSEC	⚠️ Not signed
A	178.21.137.140^{🇵🇱 SerczerNET178.21.136.0/21 SERCZERNET-IP}
		PTR	`mail1.serczer.pl`

`serczer.pl`

	DNSSEC	⚠️ Not signed
	A	178.21.137.138^{🇵🇱 SerczerNET178.21.136.0/21 SERCZERNET-IP}
	NS	`dns1.serczer.pl` ⭐
	NS	`fns1.42.pl`
	NS	`fns2.42.pl`
	MX	`mail1.serczer.pl` ⭐
	TXT	`v=spf1 mx ip4:178.21.137.140 a:mail1.serczer.pl include:_spf.google.com ~all`
	TXT	`google-site-verification=p4xSjDU3ZsBwLcdbryzVSELrG5H822IY8bvJcDl0uP0`
	SOA	`dns1.serczer.pl`root@dns1.serczer.pl 2025-05-08 #1

PTR for

140.137.21.178.in-addr.arpa

MX for

serczer.pl

Same first word

mail1.in

mail1.cloudns.cl

mail1.org

mail1.hu

mail1.dk

mail1.servehttp.com

mail1.info

mail1.io

mail1.de

mail1.ca

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mail1.ai

mail1.email

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mail1.gov.ru

mail1.se

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mail1.at

mail1.kinghost.net

mail1.ws

mail1.nl

Similar names

1mail.com

mali1.com

1mail.it

1mail.org

alim1.com

1mail.co.uk

1mail.gr

1mail.at

1mail.be

1mail.dk

1mail.ru

1mail.tv

liam1.com

1mila.com

1mail.ovh

1mail.pro

1mail.fr

1mail.co.za

1mail.info

1mila.pl

lima1.com

1mail.lt

1mail.de

1mail.co

1mail.one

liam1.de

1mail.ca

1mail.us

1mail.cz

1mail.nl

1mail.ch

1mail.tw

DNS History

2 records (1 active, 1 former)

●A178.21.137.1402015-08-11 → 2026-05-14 · 6 obs

● 2015-08-11 05:54:22
● 2016-07-11 19:24:02
○ 2016-12-18 18:05:16
○ 2017-07-23 10:36:58
● 2026-02-14 18:58:18
● 2026-05-14 18:18:30

○A178.21.137.1412016-12-18 → 2017-07-23 · 5 obs

○ 2016-07-11 19:24:02
● 2016-12-18 18:05:16
● 2017-07-23 10:36:58
○ 2026-02-14 18:58:18
○ 2026-05-14 18:18:30

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
pl	h-dns.pl, f-dns.pl, a-dns.pl, d-dns.pl...	-
serczer.pl	dns1.serczer.pl, fns1.42.pl, fns2.42.pl	4 records

✅ Authoritative Response

Server:79.98.145.34

NS records: dns1.serczer.pl, fns1.42.pl, fns2.42.pl

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for serczer.pl (unsigned zone)

⏱️ Timing

Total: 232ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`178.21.137.140`

📌 Glue Records Collected

Total: 4

In-bailiwick: 1 (dns1.serczer.pl)

Out-of-bailiwick: 3 (fns1.42.pl, fns2.42.pl, fns2.42.pl)

Analysis

Mail Server Role

mail1.serczer.pl serves as the mail server for serczer.pl.

IP Addresses

mail1.serczer.pl points to a single IP address: 178.21.137.140.

Other host names, for instance mail1.serczernet.pl, share IP numbers with mail1.serczer.pl.

mail1.serczer.pl - robtex.com

mail1.serczer.pl

serczer.pl