code4u.jp - robtex.com

🛡️Domain Reputation CheckBlocklist, phishing & malware status→

code4u.jp

DNSSEC⚠️ Not signed
A2403:3a00:101:e:219:94:163:94🇯🇵 SAKURA-C2403:3a00::/32 SAKURA Internet // OSAKA BACKBONE 1-8-14 Minami-Honmachi, Chuo-ku, Osaka 541-0054, Japan
PTRwww1484.sakura.ne.jp
A219.94.163.94🇯🇵 SAKURA-C219.94.128.0/17 (3/OSAKA) SAKURA Internet // WEST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan
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
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
MXcode4u.jp ⭐
A2403:3a00:101:e:219:94:163:94🇯🇵 SAKURA-C2403:3a00::/32 SAKURA Internet // OSAKA BACKBONE 1-8-14 Minami-Honmachi, Chuo-ku, Osaka 541-0054, Japan
PTRwww1484.sakura.ne.jp
A219.94.163.94🇯🇵 SAKURA-C219.94.128.0/17 (3/OSAKA) SAKURA Internet // WEST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan
PTRwww1484.sakura.ne.jp
TXTv=spf1 a:www1484.sakura.ne.jp mx ~all
SOAmaster.dns.ne.jptech@sakura.ad.jp 2024-04-07 #17

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=1790143202

MX for

code4u.jp

Same first word

code4u.app
code4u.com.ua
code4u.xyz
code4u.co.il
code4u.ir
code4u.blog
code4u.online
code4u.eu.org
code4u.jp
code4u.top
code4u.com
code4u.pages.dev
code4u.net
code4u.pl
code4u.nl
code4u.de
code4u.vn
code4u.dev
code4u.org
code4u.io
code4u.ru
code4u.site
code4u.fr
code4u.cloudns.biz
code4u.ee
code4u.com.br
code4u.pt
code4u.mx
code4u.cn
code4u.be
code4u.at

Similar names

4educo.com
edoc4u.com
ecod4u.com
4ucode.workers.dev
4ucode.dev
deco4u.in
4ucode.com.br
4ucode.net.ph
deco4u.com
u4code.com
deco4u.de
edocu4.workers.dev
4ucode.com
4codeu.com

Previous names

code-share.jp
code-spaces.jp
code-storm.jp
code-u.jp
code-web.jp
code-works.jp
code-x.jp
code-y.jp
code0.jp
code1.jp
code1935.jp
code1ventures.jp
code27.jp
code3.jp
code404.jp
code42.jp
code4biz.jp
code4lib.jp
code4okayama.jp
code4susono.jp

Next names

code5.jp
code8.jp
codeadventure.jp
codeagent.jp
codeaid.jp
codearc.jp
codeart.jp
codearts.jp
codeassist.jp
codeathlete.jp
codeathome.jp
codeavengers.jp
codebase.jp
codebee.jp
codeble.jp
codeblock.jp
codebloom.jp
codeblue.jp
codebook.jp
codebot.jp

DNS History

6 records (6 active, 0 former)

NSmaster.dns.ne.jpns1.dns.ne.jpns2.dns.ne.jpMXcode4u.jpA219.94.163.942403:3a00:101:e:219:94:163:94
●NSmaster.dns.ne.jp2026-09-18 → 2026-09-23 · 2 obs
● 2026-09-18 03:36:04
● 2026-09-23 06:50:38
●NSns1.dns.ne.jp2026-09-18 → 2026-09-23 · 2 obs
● 2026-09-18 03:36:04
● 2026-09-23 06:50:38
●NSns2.dns.ne.jp2026-09-18 → 2026-09-23 · 2 obs
● 2026-09-18 03:36:04
● 2026-09-23 06:50:38
●MXcode4u.jp2026-09-18 → 2026-09-23 · 2 obs
● 2026-09-18 03:36:04
● 2026-09-23 06:50:38
●A219.94.163.942026-09-18 → 2026-09-23 · 2 obs
● 2026-09-18 03:36:04
● 2026-09-23 06:50:38
●A2403:3a00:101:e:219:94:163:942026-09-18 → 2026-09-23 · 2 obs
● 2026-09-18 03:36:04
● 2026-09-23 06:50:38

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
jpe.dns.jp, c.dns.jp, a.dns.jp, d.dns.jp...-
code4u.jpns2.dns.ne.jp, ns1.dns.ne.jp2 records

✅ Authoritative Response

Server:61.211.236.1

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for code4u.jp (unsigned zone)

⏱️ Timing

Total: 1247ms | Queries: -

📄 Records

TypeCountSample Data
A1219.94.163.94
AAAA12403:3a00:101:e:219:94:163:94
NS2ns1.dns.ne.jp, ns2.dns.ne.jp
MX1code4u.jp (pri: 10)
TXT1v=spf1 a:www1484.sakura.ne.jp mx ~all
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

Mail Server Role

code4u.jp acts as its own mail server.

IP Addresses

code4u.jp has two IP addresses: 219.94.163.94 and 2403:3a00:101:e:219:94:163:94

Additional host names — xn--28jh4a6gqb7627anhh6a5209e.com, mcodingclub.com, xn--28jh4a6gqb.com and two others — share IP numbers with code4u.jp.

Name Servers

code4u.jp carries NS records delegating to master.dns.ne.jp, ns1.dns.ne.jp and ns2.dns.ne.jp.

There is at least partial name server overlap between code4u.jp and other domains — hmd-consult.com, suginobusinkyuu.sakura.ne.jp, nagoya-hatsumei.org and two more among them.

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 — each hostname maps to exactly one IP address.

Mail Servers

code4u.jp has a single mail server: code4u.jp itself.

code4u.jp carries two IP numbers: 219.94.163.94 and 2403:3a00:101:e:219:94:163:94.