jo-ko.cz - robtex.com

jo-ko.cz

DNSSEC⚠️ Not signed
A2001:1528:181::76:165🇨🇿 CASABLANCA-AS2001:1528::/32 Casablanca INT v6 network
PTRwww1.proweb.cz
A77.78.76.165🇨🇿 CASABLANCA-AS77.78.76.0/24 Casablanca INT prefix fraction
NSns.grdns.cz ⭐
A2001:15e8:101:1::c268🇨🇿 INTERNET-CZ2001:15e8::/32
PTRns.grdns.cz
A81.2.194.104🇨🇿 INTERNET-CZ81.2.192.0/18 INTERNET CZ, a.s.
PTRns.grdns.cz
NSns.grdns.it
A2a00:6d41:2:1::7🇮🇹 ARUBA-ASN2a00:6d41::/32 Aruba S.p.A. IPv6 Network
PTRns.grdns.it
A95.110.254.167🇮🇹 ARUBA-ASN95.110.192.0/18 Aruba S.p.A. Network
PTRns.grdns.it
MXemail.webglobe.cz ⭐
A2001:1ab0:7e1f:1::1:5🇨🇿 IGNUM-AS2001:1ab0::/32 Network of Ignum s.r.o. Czech Republic http://www.ignum.cz/
PTRemail.webglobe.cz
A130.193.14.154🇨🇿 IGNUM-AS130.193.8.0/21 Webglobe s.r.o. H90
PTRemail.webglobe.cz
MXemail2.webglobe.cz ⭐
A130.193.14.154🇨🇿 IGNUM-AS130.193.8.0/21 Webglobe s.r.o. H90
PTRemail.webglobe.cz
MXemail3.webglobe.cz ⭐
A2001:880:0:15::2b1🇩🇪 ONE-NETWORK2001:880::/32
PTRemail3.webglobe.cz
A185.102.21.80🇨🇿 ONE-NETWORK185.102.21.0/24
PTRemail3.webglobe.cz
MXemail4.webglobe.cz ⭐
A185.102.21.80🇨🇿 ONE-NETWORK185.102.21.0/24
PTRemail3.webglobe.cz
SOAns.grdns.czadmin@forpsi.com 2025-07-01 #2

cz

DNSSEC🔒 Signed (DS record present)
NSa.ns.nic.cz ⭐
NSb.ns.nic.cz
NSc.ns.nic.cz
NSd.ns.nic.cz
SOAa.ns.nic.czhostmaster@nic.cz serial=1777670236

Same first word

jo-ko.at
jo-ko.cz
jo-ko.de
jo-ko.co.jp

Similar names

ko-jo.hu
ko-jo.de

DNS History

16 records (8 active, 8 former)

20162017201820192020202120222023202420252026NSns.grdns.czns.grdns.itns.compositiv.comns02.compositiv.comns03.compositiv.comns04.compositiv.comns1.webhouse.skns2.webhouse.skMXemail.webglobe.czemail2.webglobe.czemail3.webglobe.czemail4.webglobe.czmail.jo-ko.czA2001:1528:181::76:16577.78.76.165109.205.134.172
○NSns.compositiv.com2015-07-13 → 2015-11-11 · 4 obs
● 2015-07-13 20:23:52
● 2015-11-11 14:41:24
○ 2016-02-10 21:32:42
○ 2026-05-01 21:53:12
●NSns.grdns.cz2026-02-21 → 2026-05-01 · 3 obs
○ 2017-04-29 12:17:36
● 2026-02-21 15:26:32
● 2026-05-01 21:53:12
●NSns.grdns.it2026-02-21 → 2026-05-01 · 3 obs
○ 2017-04-29 12:17:36
● 2026-02-21 15:26:32
● 2026-05-01 21:53:12
○NSns02.compositiv.com2015-07-13 → 2015-11-11 · 4 obs
● 2015-07-13 20:23:52
● 2015-11-11 14:41:24
○ 2016-02-10 21:32:42
○ 2026-05-01 21:53:12
○NSns03.compositiv.com2015-07-13 → 2015-11-11 · 4 obs
● 2015-07-13 20:23:52
● 2015-11-11 14:41:24
○ 2016-02-10 21:32:42
○ 2026-05-01 21:53:12
○NSns04.compositiv.com2015-07-13 → 2015-11-11 · 4 obs
● 2015-07-13 20:23:52
● 2015-11-11 14:41:24
○ 2016-02-10 21:32:42
○ 2026-05-01 21:53:12
○NSns1.webhouse.sk2016-05-11 → 2017-04-29 · 5 obs
○ 2016-02-10 21:32:42
● 2016-05-11 08:57:00
● 2017-04-29 12:17:36
○ 2026-02-21 15:26:32
○ 2026-05-01 21:53:12
○NSns2.webhouse.sk2016-05-11 → 2017-04-29 · 5 obs
○ 2016-02-10 21:32:42
● 2016-05-11 08:57:00
● 2017-04-29 12:17:36
○ 2026-02-21 15:26:32
○ 2026-05-01 21:53:12
●MXemail.webglobe.cz2026-02-21 → 2026-05-01 · 3 obs
○ 2016-02-10 21:32:42
● 2026-02-21 15:26:32
● 2026-05-01 21:53:12
●MXemail2.webglobe.cz2026-02-21 → 2026-05-01 · 3 obs
○ 2016-02-10 21:32:42
● 2026-02-21 15:26:32
● 2026-05-01 21:53:12
●MXemail3.webglobe.cz2026-02-21 → 2026-05-01 · 3 obs
○ 2016-02-10 21:32:42
● 2026-02-21 15:26:32
● 2026-05-01 21:53:12
●MXemail4.webglobe.cz2026-02-21 → 2026-05-01 · 3 obs
○ 2016-02-10 21:32:42
● 2026-02-21 15:26:32
● 2026-05-01 21:53:12
○MXmail.jo-ko.cz2015-07-13 → 2015-11-11 · 4 obs
● 2015-07-13 20:23:52
● 2015-11-11 14:41:24
○ 2016-02-10 21:32:42
○ 2026-05-01 21:53:12
○A109.205.134.1722015-07-13 → 2017-04-29 · 7 obs
● 2015-07-13 20:23:52
● 2015-11-11 14:41:24
○ 2016-02-10 21:32:42
● 2016-05-11 08:57:00
● 2017-04-29 12:17:36
○ 2026-02-21 15:26:32
○ 2026-05-01 21:53:12
●A2001:1528:181::76:1652026-02-21 → 2026-05-01 · 3 obs
○ 2017-04-29 12:17:36
● 2026-02-21 15:26:32
● 2026-05-01 21:53:12
●A77.78.76.1652026-02-21 → 2026-05-01 · 3 obs
○ 2017-04-29 12:17:36
● 2026-02-21 15:26:32
● 2026-05-01 21:53:12

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
cza.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz-
jo-ko.czns.grdns.cz, ns.grdns.it2 records

✅ Authoritative Response

Server:81.2.194.104

NS records: ns.grdns.cz, ns.grdns.it

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for jo-ko.cz (unsigned zone)

⏱️ Timing

Total: 1701ms | Queries: -

📄 Records

TypeCountSample Data
A177.78.76.165
AAAA12001:1528:181::76:165
NS2ns.grdns.cz, ns.grdns.it
MX4email.webglobe.cz (pri: 10), email2.webglobe.cz (pri: 10)...
SOA1ns.grdns.cz admin.forpsi.com

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns.grdns.cz, ns.grdns.cz)

Analysis

IP Addresses

jo-ko.cz points to two IP numbers: 2001:1528:181::76:165 and 77.78.76.165.

Other host names, for instance hudeczek.cz, eboo.cz, zstgm-praha.cz, evlise.cz and jap-video.cz share IP numbers with jo-ko.cz.

Name Servers

Delegation for jo-ko.cz rests with two name servers, ns.grdns.cz and ns.grdns.it.

jo-ko.cz shares the same name server setup as other domains, including daniz.cz, biopharma.cz, disk-dz.cz, lavel.eu and mavenir.me.

Host names with two IP numbers: ns.grdns.cz points to 2001:15e8:101:1::c268 and 81.2.194.104; ns.grdns.it points to 2a00:6d41:2:1::7 and 95.110.254.167.

Mail Servers

jo-ko.cz is handled by four mail servers: email2.webglobe.cz, email3.webglobe.cz, email4.webglobe.cz and email.webglobe.cz.

jo-ko.cz shares mail servers with other domains at least in part, for instance sileo.cz, pt2.cz, laserem.cz, sdusi.art and rmt.cz.

Host names with two IP numbers

email3.webglobe.cz points to 2001:880:0:15::2b1 and 185.102.21.80.

email.webglobe.cz points to 2001:1ab0:7e1f:1::1:5 and 130.193.14.154.

Host names with one IP number

email2.webglobe.cz points to 130.193.14.154.

email4.webglobe.cz points to 185.102.21.80.

Names pointing to 185.102.21.80

email3.webglobe.cz and email4.webglobe.cz.

Names pointing to 130.193.14.154

email.webglobe.cz and email2.webglobe.cz.