netdeveloper.cz - dns.ninja

`netdeveloper.cz`

DNSSEC	🔒 Signed (DS record present)
A	2001:67c:e94:1:1:5bef:c911:1^{Blindspot2001:67c:e94::/48 THINLINE-BlindSpot}
		PTR	`rproxy6.thinline.cz`
A	91.239.201.17^{🇨🇿 Blindspot91.239.200.0/23 THINLINE-BlindSpot}
NS	`ns1.thinline.cz` ⭐
		A	2001:67c:e94:0:1:5bef:c8f3:1^{Blindspot2001:67c:e94::/48 THINLINE-BlindSpot}
			PTR	`ns1.thinline.cz`
		A	91.239.200.243^{🇨🇿 Blindspot91.239.200.0/23 THINLINE-BlindSpot}
			PTR	`ns1.thinline.cz`
NS	`ns2.thinline.cz`
		A	2001:4de8:fa22:0:1:5264:602:1^{🇨🇿 QUANTCOM-AS2001:4de8::/32 Dial Telecom, a.s.}
			PTR	`ns2.thinline.cz`
		A	82.100.6.2^{🇨🇿 QUANTCOM-AS82.100.0.0/18 Dial Telecom, a.s.}
			PTR	`ns2.thinline.cz`
NS	`ns3.cesky-hosting.eu`
		A	2001:67c:e94:1:1:5bef:ca12:1^{Blindspot2001:67c:e94::/48 THINLINE-BlindSpot}
			PTR	`ns3.cesky-hosting.eu`
		A	91.239.202.18^{🇨🇿 Blindspot91.239.202.0/23 THINLINE-BlindSpot}
			PTR	`ns3.cesky-hosting.eu`
MX	`219c0485baee10a6.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	`219c0485baee10a6.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	`ns1.thinline.cz`hostmaster@netdeveloper.cz serial=20194161

`cz`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.ns.nic.cz` ⭐
	NS	`b.ns.nic.cz`
	NS	`c.ns.nic.cz`
	NS	`d.ns.nic.cz`
	SOA	`a.ns.nic.cz`hostmaster@nic.cz serial=1783428437

Same first word

netdeveloper.be

netdeveloper.cz

netdeveloper.app

Similar names

developernet.com

DNS History

23 records (7 active, 16 former)

○NSns.forpsi.cz2015-06-20 → 2017-01-18 · 4 obs

● 2015-06-20 15:56:46
● 2017-01-18 14:45:40
○ 2019-03-25 00:55:44
○ 2026-07-07 13:17:34

○NSns.forpsi.it2015-06-20 → 2017-01-18 · 4 obs

● 2015-06-20 15:56:46
● 2017-01-18 14:45:40
○ 2019-03-25 00:55:44
○ 2026-07-07 13:17:34

○NSns.forpsi.net2015-06-20 → 2017-01-18 · 4 obs

● 2015-06-20 15:56:46
● 2017-01-18 14:45:40
○ 2019-03-25 00:55:44
○ 2026-07-07 13:17:34

○NSns.wedos.com2019-03-25 → 2019-03-25 · 4 obs

○ 2017-01-18 14:45:40
● 2019-03-25 00:55:44
○ 2026-02-21 22:02:40
○ 2026-07-07 13:17:34

○NSns.wedos.cz2019-03-25 → 2019-03-25 · 4 obs

○ 2017-01-18 14:45:40
● 2019-03-25 00:55:44
○ 2026-02-21 22:02:40
○ 2026-07-07 13:17:34

○NSns.wedos.eu2019-03-25 → 2019-03-25 · 4 obs

○ 2017-01-18 14:45:40
● 2019-03-25 00:55:44
○ 2026-02-21 22:02:40
○ 2026-07-07 13:17:34

○NSns.wedos.net2019-03-25 → 2019-03-25 · 4 obs

○ 2017-01-18 14:45:40
● 2019-03-25 00:55:44
○ 2026-02-21 22:02:40
○ 2026-07-07 13:17:34

●NSns1.thinline.cz2026-02-21 → 2026-07-07 · 3 obs

○ 2019-03-25 00:55:44
● 2026-02-21 22:02:40
● 2026-07-07 13:17:34

●NSns2.thinline.cz2026-02-21 → 2026-07-07 · 3 obs

○ 2019-03-25 00:55:44
● 2026-02-21 22:02:40
● 2026-07-07 13:17:34

●NSns3.cesky-hosting.eu2026-02-21 → 2026-07-07 · 3 obs

○ 2019-03-25 00:55:44
● 2026-02-21 22:02:40
● 2026-07-07 13:17:34

●MX219c0485baee10a6.mx1.emailprofi.seznam.cz2026-02-21 → 2026-07-07 · 3 obs

○ 2019-03-25 00:55:44
● 2026-02-21 22:02:40
● 2026-07-07 13:17:34

●MX219c0485baee10a6.mx2.emailprofi.seznam.cz2026-02-21 → 2026-07-07 · 3 obs

○ 2019-03-25 00:55:44
● 2026-02-21 22:02:40
● 2026-07-07 13:17:34

○MXalt1.aspmx.l.google.com2015-06-20 → 2019-03-25 · 4 obs

● 2015-06-20 15:56:46
● 2019-03-25 00:55:44
○ 2026-02-21 22:02:40
○ 2026-07-07 13:17:34

○MXalt2.aspmx.l.google.com2015-06-20 → 2019-03-25 · 4 obs

● 2015-06-20 15:56:46
● 2019-03-25 00:55:44
○ 2026-02-21 22:02:40
○ 2026-07-07 13:17:34

○MXaspmx.l.google.com2015-06-20 → 2019-03-25 · 4 obs

● 2015-06-20 15:56:46
● 2019-03-25 00:55:44
○ 2026-02-21 22:02:40
○ 2026-07-07 13:17:34

○MXaspmx2.googlemail.com2015-06-20 → 2019-03-25 · 4 obs

● 2015-06-20 15:56:46
● 2019-03-25 00:55:44
○ 2026-02-21 22:02:40
○ 2026-07-07 13:17:34

○MXaspmx3.googlemail.com2015-06-20 → 2019-03-25 · 4 obs

● 2015-06-20 15:56:46
● 2019-03-25 00:55:44
○ 2026-02-21 22:02:40
○ 2026-07-07 13:17:34

○MXaspmx4.googlemail.com2015-06-20 → 2017-01-18 · 4 obs

● 2015-06-20 15:56:46
● 2017-01-18 14:45:40
○ 2019-03-25 00:55:44
○ 2026-07-07 13:17:34

○MXaspmx5.googlemail.com2015-06-20 → 2017-01-18 · 4 obs

● 2015-06-20 15:56:46
● 2017-01-18 14:45:40
○ 2019-03-25 00:55:44
○ 2026-07-07 13:17:34

●A2001:67c:e94:1:1:5bef:c911:12026-02-21 → 2026-07-07 · 3 obs

○ 2019-03-25 00:55:44
● 2026-02-21 22:02:40
● 2026-07-07 13:17:34

○A37.157.192.632015-06-20 → 2019-03-25 · 7 obs

● 2015-06-20 15:56:46
● 2015-11-05 22:52:00
○ 2016-01-28 08:17:16
● 2016-05-09 00:17:28
● 2019-03-25 00:55:44
○ 2026-02-21 22:02:40
○ 2026-07-07 13:17:34

○A86.49.191.1652016-01-28 → 2016-01-28 · 4 obs

○ 2015-11-05 22:52:00
● 2016-01-28 08:17:16
○ 2016-05-09 00:17:28
○ 2026-07-07 13:17:34

●A91.239.201.172026-02-21 → 2026-07-07 · 3 obs

○ 2019-03-25 00:55:44
● 2026-02-21 22:02:40
● 2026-07-07 13:17:34

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cz	a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz	-
netdeveloper.cz	ns1.thinline.cz, ns2.thinline.cz, ns3.cesky-hosting.eu	4 records

✅ Authoritative Response

Server:91.239.200.243

NS records: ns1.thinline.cz, ns2.thinline.cz, ns3.cesky-hosting.eu

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 1247ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`91.239.201.17`
AAAA	1	`2001:67c:e94:1:1:5bef:c911:1`
NS	3	`ns1.thinline.cz, ns2.thinline.cz...`
MX	2	`219c0485baee10a6.mx2.emailprofi.seznam.c, 219c0485baee10a6.mx1.emailprofi.seznam.c`
TXT	1	`v=spf1 include:spf.seznam.cz ~all`
SOA	1	`ns1.thinline.cz hostmaster.netdeveloper.`

📌 Glue Records Collected

Total: 4

Out-of-bailiwick: 4 (ns1.thinline.cz, ns2.thinline.cz, ns1.thinline.cz...)

Analysis

IP Addresses

netdeveloper.cz directs to two IP numbers, 91.239.201.17 and 2001:67c:e94:1:1:5bef:c911:1

Two other host names, along with galerie-autobusu.cz, tests.cz and fcm.cz, also share IP numbers with netdeveloper.cz.

Name Servers

Three name servers are authoritative for netdeveloper.cz: ns1.thinline.cz, ns2.thinline.cz and ns3.cesky-hosting.eu.

netdeveloper.cz partially shares its NS delegation with several other domains, including krompasan.sk, 1000miles.cz, tlakove-myti.cz and two others.

ns1.thinline.cz resolves to 91.239.200.243 and 2001:67c:e94:0:1:5bef:c8f3:1. ns2.thinline.cz resolves to 82.100.6.2 and 2001:4de8:fa22:0:1:5264:602:1. ns3.cesky-hosting.eu resolves to 91.239.202.18 and 2001:67c:e94:1:1:5bef:ca12:1. All three hostnames point to two IP numbers each.

Mail Servers

netdeveloper.cz is served by two mail servers, 219c0485baee10a6.mx1.emailprofi.seznam.cz and 219c0485baee10a6.mx2.emailprofi.seznam.cz.

Each of the two host names carries two IP addresses: 219c0485baee10a6.mx1.emailprofi.seznam.cz points to 77.75.77.56 and 2a02:598:2::1056, and 219c0485baee10a6.mx2.emailprofi.seznam.cz points to 77.75.77.146 and 2a02:598:2::1146.