`offcourse.jp`

DNSSEC	⚠️ Not signed
A	160.16.51.57^{🇯🇵 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}
		PTR	`kotono.pursa.net`
NS	`kotono.pursa.net` ⭐
		A	160.16.51.57^{🇯🇵 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}
			PTR	`kotono.pursa.net`
NS	`asus01.pursa.jp`
		A	116.80.77.239^{🇯🇵 InfoSphere116.80.0.0/16 INFOSPHERE}
			PTR	`116-80-77-239.indigo.static.arena.ne.jp`
SOA	`kotono.pursa.net`mayumi@cafe.mayumi.jp 2023-02-09 #1

`jp`

	DNSSEC	🔒 Signed (DS record present)
	NS	`z.dns.jp` ⭐
	NS	`a.dns.jp`
	NS	`b.dns.jp`
	NS	`c.dns.jp`
	NS	`d.dns.jp`
	NS	`e.dns.jp`
	NS	`f.dns.jp`
	NS	`g.dns.jp`
	NS	`h.dns.jp`
	SOA	`z.dns.jp`root@dns.jp serial=1775943902

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)

●NSasus01.pursa.jp2015-07-24 → 2026-04-11 · 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
● 2026-04-11 22:07:26

○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
○ 2026-04-11 22:07:26

●NSkotono.pursa.net2026-03-26 → 2026-04-11 · 3 obs

○ 2017-03-18 18:56:34
● 2026-03-26 14:14:42
● 2026-04-11 22:07:26

●A160.16.51.572026-03-26 → 2026-04-11 · 3 obs

○ 2017-03-18 18:56:34
● 2026-03-26 14:14:42
● 2026-04-11 22:07:26

○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
○ 2026-04-11 22:07:26

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
jp	c.dns.jp, a.dns.jp, g.dns.jp, e.dns.jp...	-
offcourse.jp	asus01.pursa.jp, kotono.pursa.net	1 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: 4930ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`160.16.51.57`
NS	2	`kotono.pursa.net, asus01.pursa.jp`
SOA	1	`kotono.pursa.net mayumi.cafe.mayumi.jp`

📌 Glue Records Collected

Total: 1

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

Analysis

IP Addresses

offcourse.jp resolves to one IP number: 160.16.51.57.

other host names including mail.far-east-cafe.jp, mail.pursa.jp, mail.mayumi.jp, far-east-cafe.jp and mail.fairway.jp share IP numbers with offcourse.jp.

Name Servers

offcourse.jp is delegated to two name servers asus01.pursa.jp and kotono.pursa.net.

offcourse.jp uses the same name server setup as other domains, such as far-east-cafe.jp, pursa.jp and fairway.jp.

Host names with one IP number:

asus01.pursa.jp points to 116.80.77.239

kotono.pursa.net points to 160.16.51.57

offcourse.jp - robtex.com

offcourse.jp

jp