cpsolver.org - dns.ninja

`cpsolver.org`

DNSSEC	⚠️ Not signed
A	78.44.141.38^{🇨🇿 VODAFONE-CZ-AS78.44.0.0/16 Vodafone Czech Republic a.s.}
		PTR	`ip-78-44-141-38.bb.vodafone.cz`
NS	`ns2.web4u.cz` ⭐
		A	2a02:a40:100:28ff::12^{🇨🇿 BlueTone-AS2a02:a40::/32 Ceske Radiokomunikace, a.s.}
			PTR	`ns2.web4u.cz`
		A	85.207.53.12^{🇨🇿 BlueTone-AS85.207.0.0/16 BlueTone-CRa-CZ Fourth address block}
			PTR	`ns2.web4u.cz`
NS	`ns.web4u.cz`
		A	2001:1568:fd::241^{🇨🇿 WEB4U2001:1568::/33}
			PTR	`ns.web4u.cz`
		A	185.14.224.241^{🇨🇿 WEB4U185.14.224.0/23}
			PTR	`ns.web4u.cz`
MX	`e6b7d96f97673e06.mx2.emailprofi.seznam.cz` ⭐
		A	2a02:598:2::1146^{🇨🇿 SEZNAM-CZ2a02:598:2::/48}
			PTR	`wildcard.mx2.emailprofi.seznam.cz`
		A	77.75.77.146^{🇨🇿 SEZNAM-CZ77.75.76.0/23 SEZNAM - III}
			PTR	`wildcard.mx2.emailprofi.seznam.cz`
MX	`e6b7d96f97673e06.mx1.emailprofi.seznam.cz`⁽²⁰⁾
		A	2a02:598:2::1056^{🇨🇿 SEZNAM-CZ2a02:598:2::/48}
			PTR	`wildcard.mx1.emailprofi.seznam.cz`
		A	77.75.77.56^{🇨🇿 SEZNAM-CZ77.75.76.0/23 SEZNAM - III}
			PTR	`wildcard.mx1.emailprofi.seznam.cz`
TXT	`v=spf1 include:spf.seznam.cz ~all`
SOA	`ns.web4u.cz`admin@web4u.cz 2024-05-14 #1

`org`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a0.org.afilias-nst.info` ⭐ ⚠️ Not in parent delegation
	NS	`a2.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`b0.org.afilias-nst.org`
	NS	`b2.org.afilias-nst.org`
	NS	`c0.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`d0.org.afilias-nst.org`
	SOA	`a0.org.afilias-nst.info`hostmaster@donuts.email serial=1785600142

Subdomains

mx.cpsolver.org

Same first word

cpsolver.com

cpsolver.org

Similar names

pclovers.com

pcsolver.com

pclovers.ru

cloverps.com

pcsolver.net

servoplc.com

cloversp.k12.sc.us

DNS History

17 records (5 active, 12 former)

●NSns.web4u.cz2020-04-11 → 2026-08-01 · 3 obs

○ 2017-04-01 17:41:44
● 2020-04-11 13:55:02
● 2026-08-01 16:34:20

○NSns1.dot5hosting.com2015-05-15 → 2017-04-01 · 4 obs

● 2015-05-15 01:00:02
● 2017-04-01 17:41:44
○ 2020-04-11 13:55:02
○ 2026-08-01 16:34:20

○NSns2.dot5hosting.com2015-05-15 → 2017-04-01 · 4 obs

● 2015-05-15 01:00:02
● 2017-04-01 17:41:44
○ 2020-04-11 13:55:02
○ 2026-08-01 16:34:20

●NSns2.web4u.cz2020-04-11 → 2026-08-01 · 3 obs

○ 2017-04-01 17:41:44
● 2020-04-11 13:55:02
● 2026-08-01 16:34:20

○MXalt1.aspmx.l.google.com2017-04-01 → 2020-04-11 · 5 obs

○ 2016-07-26 03:43:44
● 2017-04-01 17:41:44
● 2020-04-11 13:55:02
○ 2026-02-22 02:38:26
○ 2026-08-01 16:34:20

○MXalt2.aspmx.l.google.com2017-04-01 → 2020-04-11 · 5 obs

○ 2016-07-26 03:43:44
● 2017-04-01 17:41:44
● 2020-04-11 13:55:02
○ 2026-02-22 02:38:26
○ 2026-08-01 16:34:20

○MXaspmx.l.google.com2017-04-01 → 2020-04-11 · 5 obs

○ 2016-07-26 03:43:44
● 2017-04-01 17:41:44
● 2020-04-11 13:55:02
○ 2026-02-22 02:38:26
○ 2026-08-01 16:34:20

○MXaspmx2.googlemail.com2017-04-01 → 2020-04-11 · 5 obs

○ 2016-07-26 03:43:44
● 2017-04-01 17:41:44
● 2020-04-11 13:55:02
○ 2026-02-22 02:38:26
○ 2026-08-01 16:34:20

○MXaspmx3.googlemail.com2017-04-01 → 2020-04-11 · 5 obs

○ 2016-07-26 03:43:44
● 2017-04-01 17:41:44
● 2020-04-11 13:55:02
○ 2026-02-22 02:38:26
○ 2026-08-01 16:34:20

●MXe6b7d96f97673e06.mx1.emailprofi.seznam.cz2026-02-22 → 2026-08-01 · 3 obs

○ 2020-04-11 13:55:02
● 2026-02-22 02:38:26
● 2026-08-01 16:34:20

●MXe6b7d96f97673e06.mx2.emailprofi.seznam.cz2026-02-22 → 2026-08-01 · 3 obs

○ 2020-04-11 13:55:02
● 2026-02-22 02:38:26
● 2026-08-01 16:34:20

○MXmx.cpsolver.org2015-05-15 → 2016-07-26 · 4 obs

● 2015-05-15 01:00:02
● 2016-07-26 03:43:44
○ 2017-04-01 17:41:44
○ 2026-08-01 16:34:20

○A66.96.133.92015-05-15 → 2015-05-15 · 3 obs

● 2015-05-15 01:00:02
○ 2015-10-18 18:17:32
○ 2026-08-01 16:34:20

○A66.96.149.12016-03-25 → 2017-04-01 · 5 obs

○ 2015-12-18 08:05:02
● 2016-03-25 15:01:26
● 2017-04-01 17:41:44
○ 2020-04-11 13:55:02
○ 2026-08-01 16:34:20

●A78.44.141.382026-02-22 → 2026-08-01 · 3 obs

○ 2020-04-11 13:55:02
● 2026-02-22 02:38:26
● 2026-08-01 16:34:20

○A78.45.113.2522020-04-11 → 2020-04-11 · 4 obs

○ 2017-04-01 17:41:44
● 2020-04-11 13:55:02
○ 2026-02-22 02:38:26
○ 2026-08-01 16:34:20

○A89.177.231.2182015-10-18 → 2015-12-18 · 5 obs

○ 2015-05-15 01:00:02
● 2015-10-18 18:17:32
● 2015-12-18 08:05:02
○ 2016-03-25 15:01:26
○ 2026-08-01 16:34:20

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
org	b0.org.afilias-nst.org, b2.org.afilias-nst.org, d0.org.afilias-nst.org	-
cpsolver.org	ns2.web4u.cz, ns.web4u.cz	-

✅ Authoritative Response

Server:185.14.224.241

NS records: ns2.web4u.cz, ns.web4u.cz

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for cpsolver.org (unsigned zone)

⏱️ Timing

Total: 636ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`78.44.141.38`
NS	2	`ns.web4u.cz, ns2.web4u.cz`
MX	2	`e6b7d96f97673e06.mx2.emailprofi.seznam.c, e6b7d96f97673e06.mx1.emailprofi.seznam.c`
TXT	1	`v=spf1 include:spf.seznam.cz ~all`
SOA	1	`ns.web4u.cz admin.web4u.cz`

Analysis

Hierarchy

The domain mx.cpsolver.org falls under the parent cpsolver.org.

IP Addresses

cpsolver.org resolves to just one IP address, 78.44.141.38.

Two other host names, along with mx.unitime.org, demo.unitime.org and mx.cpsolver.org, also share IP numbers with cpsolver.org.

Name Servers

Two name servers handle the delegation for cpsolver.org: ns2.web4u.cz and ns.web4u.cz.

cpsolver.org shares its NS records with other domains, for example mctut.cz, obectachov.cz, cerrum.com and two others.

ns2.web4u.cz and ns.web4u.cz both carry two IP addresses. The A records for ns2.web4u.cz are 85.207.53.12 and 2a02:a40:100:28ff::12; the A records for ns.web4u.cz are 185.14.224.241 and 2001:1568:fd::241.

Mail Servers

cpsolver.org is served by two mail servers, e6b7d96f97673e06.mx1.emailprofi.seznam.cz and e6b7d96f97673e06.mx2.emailprofi.seznam.cz.

e6b7d96f97673e06.mx1.emailprofi.seznam.cz and e6b7d96f97673e06.mx2.emailprofi.seznam.cz both carry two IP addresses. The A records for e6b7d96f97673e06.mx1.emailprofi.seznam.cz are 77.75.77.56 and 2a02:598:2::1056; the A records for e6b7d96f97673e06.mx2.emailprofi.seznam.cz are 77.75.77.146 and 2a02:598:2::1146.