`a4w.cz`

DNSSEC	⚠️ Not signed
A	2001:1ab0:7e1e:151:62:109:154:16^{🇨🇿 IGNUM-AS2001:1ab0::/32 Network of Ignum s.r.o. Czech Republic http://www.ignum.cz/}
		PTR	`dw218.webglobe.com`
A	62.109.154.16^{🇨🇿 IGNUM-AS62.109.128.0/19 Network of Ignum s.r.o. Czech Republic http://www.ignum.cz/}
NS	`ns1.savana.cz` ⭐ ⚠️ Not in parent delegation
		A	2a00:1e40:a:53::5^{🇸🇰 IGNUM-AS2a00:1e40:a::/48}
			PTR	`ns1-bra.core.webglobe.com`
		A	185.65.223.35^{🇸🇰 IGNUM-AS185.65.223.0/24}
			PTR	`ns1-bra.core.webglobe.com`
NS	`ns1.webglobe.cz` ⚠️ Not in zone NS records
		A	2a00:1e40:a:53::5^{🇸🇰 IGNUM-AS2a00:1e40:a::/48}
			PTR	`ns1-bra.core.webglobe.com`
		A	185.65.223.35^{🇸🇰 IGNUM-AS185.65.223.0/24}
			PTR	`ns1-bra.core.webglobe.com`
NS	`ns2.savana.cz` ⚠️ Not in parent delegation
		A	2001:1ab0:7e1e:2::5^{🇨🇿 IGNUM-AS2001:1ab0::/32 Network of Ignum s.r.o. Czech Republic http://www.ignum.cz/}
			PTR	`ns2-prg.core.webglobe.com`
		A	217.31.48.201^{🇨🇿 IGNUM-AS217.31.48.0/20 Network of Ignum s.r.o. Czech Republic http://www.ignum.cz/}
			PTR	`ns2-prg.core.webglobe.com`
NS	`ns2.webglobe.cz` ⚠️ Not in zone NS records
		A	2001:1ab0:7e1e:2::5^{🇨🇿 IGNUM-AS2001:1ab0::/32 Network of Ignum s.r.o. Czech Republic http://www.ignum.cz/}
			PTR	`ns2-prg.core.webglobe.com`
		A	217.31.48.201^{🇨🇿 IGNUM-AS217.31.48.0/20 Network of Ignum s.r.o. Czech Republic http://www.ignum.cz/}
			PTR	`ns2-prg.core.webglobe.com`
NS	`ns3.savana.cz` ⚠️ Not in parent delegation
		A	2a03:b0c0:1:d0::1090:2001^{🇬🇧 DIGITALOCEAN2a03:b0c0:1::/48 DigitalOcean}
			PTR	`ns3-lon.core.webglobe.com`
		A	178.62.60.201^{🇬🇧 DIGITALOCEAN178.62.0.0/18 DigitalOcean}
			PTR	`ns3-lon.core.webglobe.com`
NS	`ns3.webglobe.com` ⚠️ Not in zone NS records
		A	2a03:b0c0:1:d0::1090:2001^{🇬🇧 DIGITALOCEAN2a03:b0c0:1::/48 DigitalOcean}
			PTR	`ns3-lon.core.webglobe.com`
		A	178.62.60.201^{🇬🇧 DIGITALOCEAN178.62.0.0/18 DigitalOcean}
			PTR	`ns3-lon.core.webglobe.com`
MX	`mx1.savana.cz` ⭐
		A	130.193.14.154^{🇨🇿 IGNUM-AS130.193.8.0/21 Webglobe s.r.o. H90}
			PTR	`email.webglobe.cz`
MX	`mx2.savana.cz`⁽²⁰⁾
		A	185.102.21.80^{🇨🇿 ONE-NETWORK185.102.21.0/24}
			PTR	`email3.webglobe.cz`
TXT	`MS=13CC8A288F5BDA4CB82CA60C75FE1DD97B85C98A`
TXT	`v=spf1 include:_spf.webglobe.com mx ip4:217.16.187.41/24 ip4:217.16.187.42/24...`
SOA	`ns1.savana.cz`hostmaster@savana.cz 2025-03-06 #2

`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=1776151036

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DNS History

16 records (10 active, 6 former)

○NSns.a4w.cz2015-06-29 → 2016-09-07 · 4 obs

● 2015-06-29 05:10:18
● 2016-09-07 00:09:46
○ 2016-11-12 23:31:40
○ 2026-04-14 08:04:10

●NSns1.savana.cz2016-11-12 → 2026-04-14 · 3 obs

○ 2016-09-07 00:09:46
● 2016-11-12 23:31:40
● 2026-04-14 08:04:10

●NSns1.webglobe.cz2026-03-27 → 2026-04-14 · 3 obs

○ 2016-11-12 23:31:40
● 2026-03-27 00:47:26
● 2026-04-14 08:04:10

○NSns2.ahosting.cz2015-06-29 → 2016-09-07 · 4 obs

● 2015-06-29 05:10:18
● 2016-09-07 00:09:46
○ 2016-11-12 23:31:40
○ 2026-04-14 08:04:10

●NSns2.savana.cz2016-11-12 → 2026-04-14 · 3 obs

○ 2016-09-07 00:09:46
● 2016-11-12 23:31:40
● 2026-04-14 08:04:10

●NSns2.webglobe.cz2026-03-27 → 2026-04-14 · 3 obs

○ 2016-11-12 23:31:40
● 2026-03-27 00:47:26
● 2026-04-14 08:04:10

●NSns3.savana.cz2016-11-12 → 2026-04-14 · 3 obs

○ 2016-09-07 00:09:46
● 2016-11-12 23:31:40
● 2026-04-14 08:04:10

●NSns3.webglobe.com2026-03-27 → 2026-04-14 · 3 obs

○ 2016-11-12 23:31:40
● 2026-03-27 00:47:26
● 2026-04-14 08:04:10

○MXmail.a4w.cz2015-06-29 → 2016-09-07 · 4 obs

● 2015-06-29 05:10:18
● 2016-09-07 00:09:46
○ 2016-11-12 23:31:40
○ 2026-04-14 08:04:10

●MXmx1.savana.cz2016-11-12 → 2026-04-14 · 3 obs

○ 2016-09-07 00:09:46
● 2016-11-12 23:31:40
● 2026-04-14 08:04:10

●MXmx2.savana.cz2016-11-12 → 2026-04-14 · 3 obs

○ 2016-09-07 00:09:46
● 2016-11-12 23:31:40
● 2026-04-14 08:04:10

●A2001:1ab0:7e1e:151:62:109:154:162026-03-27 → 2026-04-14 · 3 obs

○ 2016-11-12 23:31:40
● 2026-03-27 00:47:26
● 2026-04-14 08:04:10

○A217.16.187.332016-11-12 → 2016-11-12 · 4 obs

○ 2016-09-07 00:09:46
● 2016-11-12 23:31:40
○ 2026-03-27 00:47:26
○ 2026-04-14 08:04:10

○A2a00:1ed0:1:1800:7:4d:2600:12016-11-12 → 2016-11-12 · 4 obs

○ 2016-09-07 00:09:46
● 2016-11-12 23:31:40
○ 2026-03-27 00:47:26
○ 2026-04-14 08:04:10

●A62.109.154.162026-03-27 → 2026-04-14 · 3 obs

○ 2016-11-12 23:31:40
● 2026-03-27 00:47:26
● 2026-04-14 08:04:10

○A78.24.10.1902015-06-29 → 2016-09-07 · 4 obs

● 2015-06-29 05:10:18
● 2016-09-07 00:09:46
○ 2016-11-12 23:31:40
○ 2026-04-14 08:04:10

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cz	a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz	-
a4w.cz	ns1.webglobe.cz, ns2.webglobe.cz, ns3.webglobe.com	4 records

✅ Authoritative Response

Server:178.62.60.201

NS records: ns1.webglobe.cz, ns2.webglobe.cz, ns3.webglobe.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for a4w.cz (unsigned zone)

⏱️ Timing

Total: 1146ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`62.109.154.16`
AAAA	1	`2001:1ab0:7e1e:151:62:109:154:16`
NS	3	`ns1.savana.cz, ns2.savana.cz...`
MX	2	`mx2.savana.cz (pri: 20), mx1.savana.cz (pri: 10)`
TXT	2	`MS=13CC8A288F5BDA4CB82CA60C75FE1DD97B85C, v=spf1 include:_spf.webglobe.com mx ip4:`
SOA	1	`ns1.savana.cz hostmaster.savana.cz`

📌 Glue Records Collected

Total: 4

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

Analysis

IP Addresses

a4w.cz resolves to two IP numbers: 2001:1ab0:7e1e:151:62:109:154:16 and 62.109.154.16.

other host names including publicnet.cz, radio-online.cz, www.domina.sk, bvgroup.cz and sbox.cz share IP numbers with a4w.cz.

Name Servers

a4w.cz is delegated to six name servers: ns3.webglobe.com, ns1.savana.cz, ns2.savana.cz, ns3.savana.cz, ns1.webglobe.cz and ns2.webglobe.cz.

a4w.cz at least partially shares name servers with other domains, for instance liberta.cz, slons.sk, relaxfit.sk, socion.cz and semilander.com.