code4u.net - dns.ninja

`code4u.net`

DNSSEC	⚠️ Not signed
A	85.131.197.180^{🇯🇵 XSERVER-AS85.131.192.0/18 XSERVER Inc.}
		PTR	`sv16239.xserver.jp`
NS	`ns1.xserver.jp` ⭐
		A	202.226.36.164^{🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.}
		A	202.226.36.170^{🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.}
		A	202.226.36.246^{🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.}
			PTR	`ns1.xserver.jp`
NS	`ns2.xserver.jp`
		A	35.72.43.26^{🇯🇵 Amazon35.72.0.0/13 EC2 NRT prefix}
			PTR	`ns2.xserver.jp`
NS	`ns3.xserver.jp`
		A	202.226.36.247^{🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.}
			PTR	`ns3.xserver.jp`
NS	`ns4.xserver.jp`
		A	183.90.224.226^{🇯🇵 XSERVER-AS183.90.224.0/20 XSERVER Inc.}
		A	183.90.224.230^{🇯🇵 XSERVER-AS183.90.224.0/20 XSERVER Inc.}
		A	202.226.39.247^{🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.}
			PTR	`ns4.xserver.jp`
NS	`ns5.xserver.jp`
		A	157.112.182.218^{🇯🇵 XSERVER-AS157.112.176.0/21 XSERVER Inc.}
		A	157.112.182.220^{🇯🇵 XSERVER-AS157.112.176.0/21 XSERVER Inc.}
		A	202.226.37.247^{🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.}
			PTR	`ns5.xserver.jp`
MX	`code4u.net` ⭐
		A	85.131.197.180^{🇯🇵 XSERVER-AS85.131.192.0/18 XSERVER Inc.}
			PTR	`sv16239.xserver.jp`
TXT	`v=spf1 +a:sv16239.xserver.jp +a:code4u.net +mx include:spf.sender.xserver.jp ...`
SOA	`ns1.xserver.jp`root@xserver.jp serial=0

`net`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1785684787

MX for

code4u.net

Previously MX for

www.code4u.net

Subdomains

www.code4u.net

Same first word

code4u.net

code4u.nl

code4u.de

code4u.vn

code4u.org

code4u.ru

code4u.cn

code4u.co

code4u.co.il

code4u.com

Similar names

4educo.com

edoc4u.com

deco4u.com

deco4u.de

4ucode.com

DNS History

25 records (7 active, 18 former)

○NSdns1.bigrock.in2015-06-05 → 2017-02-12 · 7 obs

○ 2008-12-12 12:49:38
● 2015-06-05 02:22:00
● 2015-12-28 22:14:30
○ 2016-04-08 12:43:10
● 2017-02-12 18:50:08
○ 2019-01-05 17:58:26
○ 2026-08-02 15:57:56

○NSdns2.bigrock.in2015-06-05 → 2017-02-12 · 7 obs

○ 2008-12-12 12:49:38
● 2015-06-05 02:22:00
● 2015-12-28 22:14:30
○ 2016-04-08 12:43:10
● 2017-02-12 18:50:08
○ 2019-01-05 17:58:26
○ 2026-08-02 15:57:56

○NSdns3.bigrock.in2015-06-05 → 2017-02-12 · 7 obs

○ 2008-12-12 12:49:38
● 2015-06-05 02:22:00
● 2015-12-28 22:14:30
○ 2016-04-08 12:43:10
● 2017-02-12 18:50:08
○ 2019-01-05 17:58:26
○ 2026-08-02 15:57:56

○NSdns4.bigrock.in2015-06-05 → 2017-02-12 · 7 obs

○ 2008-12-12 12:49:38
● 2015-06-05 02:22:00
● 2015-12-28 22:14:30
○ 2016-04-08 12:43:10
● 2017-02-12 18:50:08
○ 2019-01-05 17:58:26
○ 2026-08-02 15:57:56

○NSns1.dsredirection.com2008-12-12 → 2008-12-12 · 3 obs

● 2008-12-12 12:49:38
○ 2015-06-05 02:22:00
○ 2026-08-02 15:57:56

○NSns1.whdms.com2016-04-08 → 2016-04-08 · 4 obs

○ 2015-12-28 22:14:30
● 2016-04-08 12:43:10
○ 2017-02-12 18:50:08
○ 2026-08-02 15:57:56

●NSns1.xserver.jp2026-02-23 → 2026-08-02 · 3 obs

○ 2019-01-05 17:58:26
● 2026-02-23 14:09:00
● 2026-08-02 15:57:56

○NSns2.dsredirection.com2008-12-12 → 2008-12-12 · 3 obs

● 2008-12-12 12:49:38
○ 2015-06-05 02:22:00
○ 2026-08-02 15:57:56

○NSns2.whdms.com2016-04-08 → 2016-04-08 · 4 obs

○ 2015-12-28 22:14:30
● 2016-04-08 12:43:10
○ 2017-02-12 18:50:08
○ 2026-08-02 15:57:56

●NSns2.xserver.jp2026-02-23 → 2026-08-02 · 3 obs

○ 2019-01-05 17:58:26
● 2026-02-23 14:09:00
● 2026-08-02 15:57:56

○NSns3.whdms.com2016-04-08 → 2016-04-08 · 4 obs

○ 2015-12-28 22:14:30
● 2016-04-08 12:43:10
○ 2017-02-12 18:50:08
○ 2026-08-02 15:57:56

●NSns3.xserver.jp2026-02-23 → 2026-08-02 · 3 obs

○ 2019-01-05 17:58:26
● 2026-02-23 14:09:00
● 2026-08-02 15:57:56

○NSns4.whdms.com2016-04-08 → 2016-04-08 · 4 obs

○ 2015-12-28 22:14:30
● 2016-04-08 12:43:10
○ 2017-02-12 18:50:08
○ 2026-08-02 15:57:56

●NSns4.xserver.jp2026-02-23 → 2026-08-02 · 3 obs

○ 2019-01-05 17:58:26
● 2026-02-23 14:09:00
● 2026-08-02 15:57:56

●NSns5.xserver.jp2026-02-23 → 2026-08-02 · 3 obs

○ 2019-01-05 17:58:26
● 2026-02-23 14:09:00
● 2026-08-02 15:57:56

○NSns73.domaincontrol.com2019-01-05 → 2019-01-05 · 4 obs

○ 2017-02-12 18:50:08
● 2019-01-05 17:58:26
○ 2026-02-23 14:09:00
○ 2026-08-02 15:57:56

○NSns74.domaincontrol.com2019-01-05 → 2019-01-05 · 4 obs

○ 2017-02-12 18:50:08
● 2019-01-05 17:58:26
○ 2026-02-23 14:09:00
○ 2026-08-02 15:57:56

●MXcode4u.net2016-04-08 → 2026-08-02 · 6 obs

○ 2015-12-28 22:14:30
● 2016-04-08 12:43:10
○ 2017-02-12 18:50:08
○ 2019-01-05 17:58:26
● 2026-02-23 14:09:00
● 2026-08-02 15:57:56

○MXus2.mx1.mailhostbox.com2015-06-05 → 2015-12-28 · 5 obs

○ 2008-12-12 12:49:38
● 2015-06-05 02:22:00
● 2015-12-28 22:14:30
○ 2016-04-08 12:43:10
○ 2026-08-02 15:57:56

○MXus2.mx2.mailhostbox.com2015-06-05 → 2015-12-28 · 5 obs

○ 2008-12-12 12:49:38
● 2015-06-05 02:22:00
● 2015-12-28 22:14:30
○ 2016-04-08 12:43:10
○ 2026-08-02 15:57:56

○MXus2.mx3.mailhostbox.com2015-06-05 → 2015-12-28 · 5 obs

○ 2008-12-12 12:49:38
● 2015-06-05 02:22:00
● 2015-12-28 22:14:30
○ 2016-04-08 12:43:10
○ 2026-08-02 15:57:56

○A184.168.221.462019-01-05 → 2019-01-05 · 4 obs

○ 2017-02-12 18:50:08
● 2019-01-05 17:58:26
○ 2026-02-23 14:09:00
○ 2026-08-02 15:57:56

○A208.73.210.1212008-12-12 → 2008-12-12 · 3 obs

● 2008-12-12 12:49:38
○ 2015-06-05 02:22:00
○ 2026-08-02 15:57:56

○A64.64.4.1792016-04-08 → 2016-04-08 · 4 obs

○ 2015-06-05 02:22:00
● 2016-04-08 12:43:10
○ 2017-02-12 18:50:08
○ 2026-08-02 15:57:56

●A85.131.197.1802026-02-23 → 2026-08-02 · 3 obs

○ 2019-01-05 17:58:26
● 2026-02-23 14:09:00
● 2026-08-02 15:57:56

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
net	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
code4u.net	ns1.xserver.jp, ns2.xserver.jp, ns3.xserver.jp, ns4.xserver.jp...	-

✅ Authoritative Response

Server:202.226.36.170

NS records: ns1.xserver.jp, ns2.xserver.jp, ns3.xserver.jp, ns4.xserver.jp, ns5.xserver.jp

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for code4u.net (unsigned zone)

⏱️ Timing

Total: 2176ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`85.131.197.180`
NS	5	`ns2.xserver.jp, ns3.xserver.jp...`
MX	1	`code4u.net (pri: 0)`
TXT	1	`v=spf1 +a:sv16239.xserver.jp +a:code4u.n`
SOA	1	`ns1.xserver.jp root.xserver.jp`

Analysis

Hierarchy

www.code4u.net is a subdomain of code4u.net.

Mail Server Role

The MX record for code4u.net points back to code4u.net — it is its own mail server.

IP Addresses

code4u.net directs to one IP number, which is 85.131.197.180.

Among the host names that share IP numbers with code4u.net are nozawa.info, spheradnsmanager.sajn.or.jp, mail.ceremo-shinkou.co.jp and two others.

Name Servers

The authoritative name servers for code4u.net are ns1.xserver.jp, ns2.xserver.jp, ns3.xserver.jp and two others.

The name servers of code4u.net overlap at least partially with those of other domains — among them simpc.jp, tanryo.com, ie-com.com and two more.

These name servers commonly appear alongside the name servers ns4.xserver.jp and ns5.xserver.jp.

Hosts with three IP address records:

ns1.xserver.jp has IP addresses 202.226.36.164, 202.226.36.170 and 202.226.36.246.

ns4.xserver.jp has IP addresses 183.90.224.226, 183.90.224.230 and 202.226.39.247.

ns5.xserver.jp has IP addresses 157.112.182.218, 157.112.182.220 and 202.226.37.247.

Hosts that resolve to one IP address:

ns2.xserver.jp directs to 35.72.43.26.

ns3.xserver.jp directs to 202.226.36.247.

Mail Servers

The MX record for code4u.net points to a single mail server: code4u.net.

code4u.net has exactly one IP number: 85.131.197.180.