co21.jp - robtex.com

co21.jp

DNSSEC⚠️ Not signed
A120.136.10.54🇯🇵 XSERVER-AS120.136.8.0/22 XSERVER Inc.
PTRsv553.xserver.jp
NSns1.xserver.jp ⭐
A202.226.36.164🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.
A202.226.36.170🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.
A202.226.36.246🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.
PTRns1.xserver.jp
NSns2.xserver.jp
A35.72.43.26🇯🇵 Amazon35.72.0.0/13 EC2 NRT prefix
PTRns2.xserver.jp
NSns3.xserver.jp
A202.226.36.247🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.
PTRns3.xserver.jp
NSns4.xserver.jp
A183.90.224.226🇯🇵 XSERVER-AS183.90.224.0/20 XSERVER Inc.
A183.90.224.230🇯🇵 XSERVER-AS183.90.224.0/20 XSERVER Inc.
A202.226.39.247🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.
PTRns4.xserver.jp
NSns5.xserver.jp
A157.112.182.218🇯🇵 XSERVER-AS157.112.176.0/21 XSERVER Inc.
A157.112.182.220🇯🇵 XSERVER-AS157.112.176.0/21 XSERVER Inc.
A202.226.37.247🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.
PTRns5.xserver.jp
MXco21.jp ⭐
A120.136.10.54🇯🇵 XSERVER-AS120.136.8.0/22 XSERVER Inc.
PTRsv553.xserver.jp
TXTv=spf1 +a:sv553.xserver.jp +a:co21.jp +mx include:spf.sender.xserver.jp ~all
SOAns1.xserver.jproot@sv0.xserver.jp serial=0

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=1774982703

Subdomains

www.co21.jp

Same first word

co21.net
co21.com

Similar names

1co2.com
12co.de
co12.net
12co.com
oc12.net
oc21.net
21co.com
co12.com
21co.ch

DNS History

7 records (7 active, 0 former)

20162017201820192020202120222023202420252026NSns1.xserver.jpns2.xserver.jpns3.xserver.jpns4.xserver.jpns5.xserver.jpMXco21.jpA120.136.10.54
●NSns1.xserver.jp2015-06-02 → 2026-03-31 · 2 obs
● 2015-06-02 17:53:04
● 2026-03-31 19:50:54
●NSns2.xserver.jp2015-06-02 → 2026-03-31 · 2 obs
● 2015-06-02 17:53:04
● 2026-03-31 19:50:54
●NSns3.xserver.jp2015-06-02 → 2026-03-31 · 2 obs
● 2015-06-02 17:53:04
● 2026-03-31 19:50:54
●NSns4.xserver.jp2015-06-02 → 2026-03-31 · 2 obs
● 2015-06-02 17:53:04
● 2026-03-31 19:50:54
●NSns5.xserver.jp2015-06-02 → 2026-03-31 · 2 obs
● 2015-06-02 17:53:04
● 2026-03-31 19:50:54
●MXco21.jp2015-06-02 → 2026-03-31 · 2 obs
● 2015-06-02 17:53:04
● 2026-03-31 19:50:54
●A120.136.10.542015-06-02 → 2026-03-31 · 2 obs
● 2015-06-02 17:53:04
● 2026-03-31 19:50:54

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
jpa.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp...-
co21.jpns4.xserver.jp, ns5.xserver.jp, ns1.xserver.jp, ns2.xserver.jp...11 records

✅ Authoritative Response

Server:157.112.182.220

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for co21.jp (unsigned zone)

⏱️ Timing

Total: 1890ms | Queries: -

📄 Records

TypeCountSample Data
A1120.136.10.54
NS5ns5.xserver.jp, ns2.xserver.jp...
MX1co21.jp (pri: 0)
TXT1v=spf1 +a:sv553.xserver.jp +a:co21.jp +m
SOA1ns1.xserver.jp root.sv0.xserver.jp

📌 Glue Records Collected

Total: 11

Out-of-bailiwick: 11 (ns1.xserver.jp, ns1.xserver.jp, ns1.xserver.jp...)

Analysis

Hierarchy

www.co21.jp has co21.jp as its parent.

IP Addresses

co21.jp maps to IP address 120.136.10.54.

Other host names, for instance ma1110su.xsrv.jp, businesspress.jp, toitoitoi.net, ami-office.com and sv553.xserver.jp share IP numbers with co21.jp.

Name Servers

co21.jp delegates to five name servers: ns1.xserver.jp, ns2.xserver.jp, ns3.xserver.jp, ns4.xserver.jp and ns5.xserver.jp.

co21.jp at least partially shares name servers with other domains such as mars-corp.jp, office-trust.co.jp, emu-corp.com, toraya-web.com and asty-inc.com.

Host names with three IPs

Host ns1.xserver.jp points to 202.226.36.164, 202.226.36.170 and 202.226.36.246

Host ns4.xserver.jp points to 183.90.224.226, 183.90.224.230 and 202.226.39.247

Host ns5.xserver.jp points to 157.112.182.218, 157.112.182.220 and 202.226.37.247

Host names with one IP

Host ns2.xserver.jp points to 35.72.43.26

Host ns3.xserver.jp points to 202.226.36.247

Mail Servers

One mail server serves co21.jp.

co21.jp points to one IP number: 120.136.10.54.