cat.nu - robtex.com

cat.nu

DNSSEC⚠️ Not signed
A160.16.205.133🇯🇵 SAKURA-B160.16.128.0/17 (TOKYO) SAKURA Internet // EAST JAPAN BACKBONE Sakaisuji Honmachi Bldg. 9F 1-8-14 Minami-Honmachi, Chuo-ku Osaka 541-0054, Japan
PTRda65.willnet.ad.jp
NSns1.willnet.ne.jp ⭐ ⚠️ Not in parent delegation
A163.43.103.130🇯🇵 SAKURA-B163.43.0.0/16 (TOKYO) SAKURA Internet // EAST JAPAN BACKBONE Sakaisuji Honmachi Bldg. 9F 1-8-14 Minami-Honmachi, Chuo-ku Osaka 541-0054, Japan
PTRns1.willnet.ne.jp
NSns1.dnsserver-jp.net ⚠️ Not in zone NS records
A163.43.103.130🇯🇵 SAKURA-B163.43.0.0/16 (TOKYO) SAKURA Internet // EAST JAPAN BACKBONE Sakaisuji Honmachi Bldg. 9F 1-8-14 Minami-Honmachi, Chuo-ku Osaka 541-0054, Japan
PTRns1.willnet.ne.jp
NSns2.dnsserver-jp.net ⚠️ Not in zone NS records
A133.18.128.93🇯🇵 KAGOYAJAPAN133.18.0.0/16 KAGOYA Japan Inc.
NSns2.willnet.ne.jp ⚠️ Not in parent delegation
A133.18.128.93🇯🇵 KAGOYAJAPAN133.18.0.0/16 KAGOYA Japan Inc.
MXmail.cat.nu(10)
A160.16.205.133🇯🇵 SAKURA-B160.16.128.0/17 (TOKYO) SAKURA Internet // EAST JAPAN BACKBONE Sakaisuji Honmachi Bldg. 9F 1-8-14 Minami-Honmachi, Chuo-ku Osaka 541-0054, Japan
PTRda65.willnet.ad.jp
TXTv=spf1 a mx include:spf01.willnet.ad.jp ~all
SOAns1.willnet.ne.jphostmaster@willnet.ne.jp 2026-01-23 #2

nu

DNSSEC🔒 Signed (DS record present)
NScatcher-in-the-rye.nic.nu ⭐
NSa.ns.nu
NSc.ns.nu
NSd.ns.nu
NSm.ns.nu
NSy.ns.nu
NSz.ns.nu
TXTid:fe4ed74a-423c-4ccd-95c7-2245813e1f62
TXTNU zone update: 2026-04-06 15:18:49 +0000 (EPOCH 1775488729) (auto)
SOAcatcher-in-the-rye.nic.nuhostmaster@nic.nu serial=1775488786

Subdomains

mail.cat.nu

Same first word

cat.com.mx
cat.to
cat.ac.jp
cat.ma
cat.sk
cat.hiphop
cat.s3-website-eu-west-1.amazonaws.com
cat.co.nz
cat.it
cat.cafe
cat.solar
cat.ac
cat.edgesuite.net
cat.rs
cat.dk
cat.tg
cat.dog
cat.ph
cat.ua
cat.ru
cat.ie
cat.restaurant
cat.engineering
cat.com.pt
cat.gov.tr
cat.tj
cat.ts.it
cat.hn
cat.hu
cat.s3.amazonaws.com
cat.info
cat.edgesuite-staging.net
cat.co.ma
cat.productions
cat.pr
cat.farm
cat.technology
cat.sb
cat.fr
cat.or.at
cat.co.za
cat.bot
cat.im
cat.ltd
cat.com.eg
cat.photography
cat.amsterdam
cat.tv
cat.news
cat.com.gt
cat.ca
cat.bio
cat.com.au
cat.org
cat.fo
cat.cologne
cat.cc
cat.co.ke
cat.parts
cat.ky
cat.fj.cn
cat.pp.ua
cat.id
cat.gr
cat.la
cat.ge
cat.in.th
cat.chat
cat.training
cat.net.au
cat.sa
cat.fi
cat.coffee
cat.financial
cat.xyz
cat.group
cat.de
cat.agency
cat.deal
cat.ee
cat.com.co
cat.dp.ua
cat.kg
cat.tools
cat.rentals
cat.org.uk
cat.barcelona
cat
cat.net
cat.com.qa
cat.town
cat.frl
cat.pictures
cat.org.in
cat.jp
cat.us
cat.casa
cat.st
cat.llc
cat.com
cat.com.pk
cat.at
cat.me
cat.mx
cat.blue
cat.cn
cat.no
cat.ae
cat.pl
cat.com.pa
cat.ch.it
cat.net.ru
cat.co.kr
cat.racing
cat.media
cat.co
cat.co.cr
cat.com.my
cat.edu.mx
cat.com.ua
cat.com.br
cat.com.do
cat.org.cn
cat.gs
cat.cool
cat.pt
cat.as
cat.su
cat.cz
cat.uk.net
cat.cl
cat.mov
cat.com.pr
cat.lt
cat.promo
cat.name
cat.or.jp
cat.inc
cat.tires
cat.jpn.org
cat.com.tr

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atc.at
atc.pl
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cta.co.nz
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cta.us
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tac.eu
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act.kr
cta.org.mz
tac.org.au
atc.gov.tw
atc.fi
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act.courses
atc.mx
tca.co

DNS History

8 records (6 active, 2 former)

20162017201820192020202120222023202420252026NSns1.dnsserver-jp.netns1.willnet.ne.jpns2.dnsserver-jp.netns2.willnet.ne.jpMXmail.cat.nuA160.16.205.133123.108.7.150163.43.91.28
●NSns1.dnsserver-jp.net2026-04-06 → 2026-04-06 · 3 obs
○ 2015-08-13 19:57:26
● 2026-04-06 02:30:24
● 2026-04-06 16:05:48
●NSns1.willnet.ne.jp2015-08-13 → 2026-04-06 · 2 obs
● 2015-08-13 19:57:26
● 2026-04-06 16:05:48
●NSns2.dnsserver-jp.net2026-04-06 → 2026-04-06 · 3 obs
○ 2015-08-13 19:57:26
● 2026-04-06 02:30:24
● 2026-04-06 16:05:48
●NSns2.willnet.ne.jp2015-08-13 → 2026-04-06 · 2 obs
● 2015-08-13 19:57:26
● 2026-04-06 16:05:48
●MXmail.cat.nu2015-08-13 → 2026-04-06 · 2 obs
● 2015-08-13 19:57:26
● 2026-04-06 16:05:48
○A123.108.7.1502015-08-13 → 2016-12-28 · 4 obs
● 2015-08-13 19:57:26
● 2016-12-28 13:36:58
○ 2018-01-03 03:29:08
○ 2026-04-06 16:05:48
●A160.16.205.1332026-04-06 → 2026-04-06 · 3 obs
○ 2018-01-03 03:29:08
● 2026-04-06 02:30:24
● 2026-04-06 16:05:48
○A163.43.91.282018-01-03 → 2018-01-03 · 4 obs
○ 2016-12-28 13:36:58
● 2018-01-03 03:29:08
○ 2026-04-06 02:30:24
○ 2026-04-06 16:05:48

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
nua.ns.nu, c.ns.nu, d.ns.nu, m.ns.nu...12 records
cat.nuns1.dnsserver-jp.net, ns2.dnsserver-jp.net-

✅ Authoritative Response

Server:133.18.128.93

NS records: ns1.dnsserver-jp.net, ns2.dnsserver-jp.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for cat.nu (unsigned zone)

⏱️ Timing

Total: 1708ms | Queries: -

📄 Records

TypeCountSample Data
A1160.16.205.133
NS2ns2.willnet.ne.jp, ns1.willnet.ne.jp
MX2mail.cat.nu (pri: 10), mail.cat.nu (pri: 0)
TXT1v=spf1 a mx include:spf01.willnet.ad.jp
SOA1ns1.willnet.ne.jp hostmaster.willnet.ne.

📌 Glue Records Collected

Total: 12

In-bailiwick: 12 (a.ns.nu, a.ns.nu, c.ns.nu...)

Analysis

Hierarchy

cat.nu is the parent of mail.cat.nu.

IP Addresses

cat.nu resolves to one IP number: 160.16.205.133.

other host names including www.dainihon-kateiongaku.co.jp, mail.machine-c.com, www.mimura-inc.co.jp, gk7.net and heiwa.net share IP numbers with cat.nu.

Name Servers

cat.nu is delegated to four name servers: ns1.dnsserver-jp.net, ns2.dnsserver-jp.net, ns1.willnet.ne.jp and ns2.willnet.ne.jp.

cat.nu at least partially shares name servers with other domains, for instance ml-tsb.jp, 4season-cl.com, willnet.org, meikodo.ne.jp and igosoft.co.jp.

Host names with one IP number:

Host name ns1.dnsserver-jp.net points to: 163.43.103.130.

Host name ns2.dnsserver-jp.net points to: 133.18.128.93.

Host name ns1.willnet.ne.jp points to: 163.43.103.130.

Host name ns2.willnet.ne.jp points to: 133.18.128.93.

Host names pointing to 163.43.103.130: ns1.dnsserver-jp.net and ns1.willnet.ne.jp.

Host names pointing to 133.18.128.93: ns2.dnsserver-jp.net and ns2.willnet.ne.jp.

Mail Servers

cat.nu is handled by a single mail server, mail.cat.nu.

mail.cat.nu resolves to IP 160.16.205.133.