offcourse.jp - dns.ninja

offcourse.jp

DNSSEC⚠️ Not signed
A160.16.51.57🇯🇵 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
PTRkotono.pursa.net
NSkotono.pursa.net ⭐
A160.16.51.57🇯🇵 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
PTRkotono.pursa.net
NSasus01.pursa.jp
A116.80.77.239🇯🇵 InfoSphere116.80.0.0/16 INFOSPHERE
PTR116-80-77-239.indigo.static.arena.ne.jp
SOAkotono.pursa.netmayumi@cafe.mayumi.jp 2023-02-09 #1

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=1782049502
WOT: SAFE (69/100)

Same first word

offcourse.org
offcourse.golf
offcourse.com.tr
offcourse.io
offcourse.dk
offcourse.bike
offcourse.se
offcourse.no
offcourse.biz
offcourse.be
offcourse.com
offcourse.ca
offcourse.de
offcourse.jp
offcourse.in
offcourse.co
offcourse.nl

Similar names

freofocus.com
courseoff.com
freofocus.com.au
forefocus.com
offsource.com

DNS History

5 records (3 active, 2 former)

20162017201820192020202120222023202420252026NSasus01.pursa.jpkotono.pursa.netcafe.mayumi.jpA160.16.51.5749.212.76.144
●NSasus01.pursa.jp2015-07-24 → 2026-06-21 · 6 obs
● 2015-07-24 22:23:12
● 2016-03-01 13:29:20
○ 2016-06-25 15:28:28
○ 2017-03-18 18:56:34
● 2026-03-26 14:14:42
● 2026-06-21 14:08:46
○NScafe.mayumi.jp2015-07-24 → 2017-03-18 · 6 obs
● 2015-07-24 22:23:12
○ 2015-11-25 12:04:52
● 2016-03-01 13:29:20
● 2017-03-18 18:56:34
○ 2026-03-26 14:14:42
○ 2026-06-21 14:08:46
●NSkotono.pursa.net2026-03-26 → 2026-06-21 · 3 obs
○ 2017-03-18 18:56:34
● 2026-03-26 14:14:42
● 2026-06-21 14:08:46
●A160.16.51.572026-03-26 → 2026-06-21 · 3 obs
○ 2017-03-18 18:56:34
● 2026-03-26 14:14:42
● 2026-06-21 14:08:46
○A49.212.76.1442015-07-24 → 2017-03-18 · 4 obs
● 2015-07-24 22:23:12
● 2017-03-18 18:56:34
○ 2026-03-26 14:14:42
○ 2026-06-21 14:08:46

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
jpe.dns.jp, g.dns.jp, c.dns.jp, a.dns.jp...-
offcourse.jpasus01.pursa.jp, kotono.pursa.net1 record

✅ Authoritative Response

Server:160.16.51.57

NS records: asus01.pursa.jp, kotono.pursa.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for offcourse.jp (unsigned zone)

⏱️ Timing

Total: 4214ms | Queries: -

📄 Records

TypeCountSample Data
A1160.16.51.57
NS2kotono.pursa.net, asus01.pursa.jp
SOA1kotono.pursa.net mayumi.cafe.mayumi.jp

📌 Glue Records Collected

Total: 1

Out-of-bailiwick: 1 (asus01.pursa.jp)

Analysis

IP Addresses

offcourse.jp has exactly one IP address — 160.16.51.57.

mail.far-east-cafe.jp, mail.pursa.jp, mail.mayumi.jp plus two other host names have IP numbers in common with offcourse.jp.

Name Servers

DNS delegation for offcourse.jp points to two name servers: asus01.pursa.jp and kotono.pursa.net.

The name server configuration of offcourse.jp is shared with other domains, for instance same-moon.jp, far-east-cafe.jp, pursa.jp and two others.

Each of asus01.pursa.jp and kotono.pursa.net has one IP address: asus01.pursa.jp uses 116.80.77.239 and kotono.pursa.net uses 160.16.51.57.