working-school.jp - robtex.com

working-school.jp

DNSSEC⚠️ Not signed
A160.16.112.237🇯🇵 SAKURA-B160.16.0.0/17 SAKURA Internet // EAST JAPAN BACKBONE Sakaisuji Honmachi Bldg. 9F 1-8-14 Minami-Honmachi, Chuo-ku Osaka 541-0054, Japan
PTRtk2-232-25733.vs.sakura.ne.jp
NSmaster.dns.ne.jp ⭐
A210.224.172.18🇯🇵 SAKURA-C210.224.160.0/19 (1/OSAKA) SAKURA Internet // WEST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan
PTRmaster.dns.ne.jp
NSns1.dns.ne.jp
A61.211.236.1🇯🇵 SAKURA-B61.211.236.0/24 (4/TOKYO) SAKURA Internet // EAST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan
PTRns1.dns.ne.jp
NSns2.dns.ne.jp
A133.167.21.1🇯🇵 SAKURA-C133.167.21.0/24 (OSAKA) SAKURA Internet // WEST JAPAN BACKBONE Grand Front Osaka Tower A 35F, 4-20 Ofukacho, Kita-ku, Osaka, Osaka 530-0011, Japan
PTRns2.dns.ne.jp
SOAmaster.dns.ne.jptech@sakura.ad.jp 2024-03-02 #16

jp

DNSSEC🔒 Signed (DS record present)
NSz.dns.jp ⭐
NSa.dns.jp
NSb.dns.jp
NSc.dns.jp
NSd.dns.jp
NSe.dns.jp
NSf.dns.jp
NSg.dns.jp
NSh.dns.jp
SOAz.dns.jproot@dns.jp serial=1773558003
WOT: SAFE (60/100)

PTR for

118.136.122.153.in-addr.arpa

Previously MX for

www.working-school.jp
working-school.jp

Subdomains

www.working-school.jp

Same first word

working-school.jp

DNS History

11 records (4 active, 7 former)

20162017201820192020202120222023202420252026NSmaster.dns.ne.jpns1.dns.ne.jpns2.dns.ne.jpns1.rsjpserver.netns1.secure.netns2.rsjpserver.netns2.secure.netMXworking-school.jpA160.16.112.237111.68.211.38153.122.136.118
●NSmaster.dns.ne.jp2026-02-17 → 2026-03-18 · 3 obs
○ 2017-08-12 22:29:10
● 2026-02-17 18:23:18
● 2026-03-18 21:41:06
●NSns1.dns.ne.jp2026-02-17 → 2026-03-18 · 3 obs
○ 2017-08-12 22:29:10
● 2026-02-17 18:23:18
● 2026-03-18 21:41:06
○NSns1.rsjpserver.net2015-12-07 → 2017-08-12 · 5 obs
○ 2015-07-19 15:30:36
● 2015-12-07 13:22:54
● 2017-08-12 22:29:10
○ 2026-02-17 18:23:18
○ 2026-03-18 21:41:06
○NSns1.secure.net2015-07-19 → 2015-07-19 · 3 obs
● 2015-07-19 15:30:36
○ 2015-12-07 13:22:54
○ 2026-03-18 21:41:06
●NSns2.dns.ne.jp2026-02-17 → 2026-03-18 · 3 obs
○ 2017-08-12 22:29:10
● 2026-02-17 18:23:18
● 2026-03-18 21:41:06
○NSns2.rsjpserver.net2015-12-07 → 2017-08-12 · 5 obs
○ 2015-07-19 15:30:36
● 2015-12-07 13:22:54
● 2017-08-12 22:29:10
○ 2026-02-17 18:23:18
○ 2026-03-18 21:41:06
○NSns2.secure.net2015-07-19 → 2015-07-19 · 3 obs
● 2015-07-19 15:30:36
○ 2015-12-07 13:22:54
○ 2026-03-18 21:41:06
○MXworking-school.jp2015-07-19 → 2017-08-12 · 4 obs
● 2015-07-19 15:30:36
● 2017-08-12 22:29:10
○ 2026-02-17 18:23:18
○ 2026-03-18 21:41:06
○A111.68.211.382015-07-19 → 2015-07-19 · 3 obs
● 2015-07-19 15:30:36
○ 2015-12-07 13:22:54
○ 2026-03-18 21:41:06
○A153.122.136.1182015-12-07 → 2017-08-12 · 5 obs
○ 2015-07-19 15:30:36
● 2015-12-07 13:22:54
● 2017-08-12 22:29:10
○ 2026-02-17 18:23:18
○ 2026-03-18 21:41:06
●A160.16.112.2372026-02-17 → 2026-03-18 · 3 obs
○ 2017-08-12 22:29:10
● 2026-02-17 18:23:18
● 2026-03-18 21:41:06

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
jpa.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp...-
working-school.jpns1.dns.ne.jp, ns2.dns.ne.jp2 records

✅ Authoritative Response

Server: 133.167.21.1

NS records: ns1.dns.ne.jp, ns2.dns.ne.jp

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for working-school.jp (unsigned zone)

⏱️ Timing

Total: 927ms | Queries: -

📄 Records

TypeCountSample Data
A1160.16.112.237
NS2ns1.dns.ne.jp, ns2.dns.ne.jp
SOA1master.dns.ne.jp tech.sakura.ad.jp

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns1.dns.ne.jp, ns2.dns.ne.jp)

Analysis

Hierarchy

www.working-school.jp is a child of working-school.jp.

IP Addresses

working-school.jp resolves to one IP number: 160.16.112.237.

Other host names, for example tk2-232-25733.vs.sakura.ne.jp, share IP numbers with working-school.jp.

Name Servers

working-school.jp is delegated to three name servers: master.dns.ne.jp, ns1.dns.ne.jp and ns2.dns.ne.jp.

working-school.jp at least partially shares name servers with other domains, including n-in.sakura.ne.jp, check-hoken.sakura.ne.jp, thesavvy.jp, t-sfa.org and tkcenter.sakura.ne.jp.

Host names with a single IP:

master.dns.ne.jp points to 210.224.172.18; ns1.dns.ne.jp points to 61.211.236.1; ns2.dns.ne.jp points to 133.167.21.1.