`s185.coreserver.jp`

DNSSEC	⚠️ Not signed
A	202.172.28.186^{🇯🇵 DRNET202.172.24.0/21}
		PTR	`s185.coreserver.jp`
MX	`s185.coreserver.jp` ⭐
		A	202.172.28.186^{🇯🇵 DRNET202.172.24.0/21}
			PTR	`s185.coreserver.jp`
TXT	`v=spf1 a:s185.coreserver.jp include:mxr.valueserver.jp ~all`

`coreserver.jp`

DNSSEC	⚠️ Not signed
A	104.18.24.150^{Cloudflare104.18.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.18.25.150^{Cloudflare104.18.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`gabriel.ns.cloudflare.com` ⭐
NS	`vera.ns.cloudflare.com`
MX	`mail.coreserver.jp` ⭐
TXT	`_globalsign-domain-verification=rgM5jLvewIPQ1kUWl4oyGT2IX6lJq_GqQv8kTD5OAY`
TXT	`google-site-verification=M52iG-enU0nhGjZ1Rv0-Jd8Gpn3NEjwa4cWvyYct9tU`
TXT	`v=spf1 a:www.coreserver.jp ip4:202.172.25.31 include:_spf.google.com ~all`
TXT	`v=spf1 redirect=value-domain.com`
HTTPS	HTTP/2 ✓ hints match
		IPv4 hints	104.18.24.150, 104.18.25.150
SOA	`gabriel.ns.cloudflare.com`dns@cloudflare.com serial=2410875002

WOT: SAFE (59/100)
rank #63212 globally
rank #1346 in the tld
WOT: SAFE (58/100)
📈 Tranco rank: #70,633

PTR for

186.28.172.202.in-addr.arpa

MX for

s185.coreserver.jp

Same first word

s185.cn

Similar names

s851.com

s815.com

851s.com

185s.com

1s58.com

185s.cc

s581.cn

DNS History

2 records (2 active, 0 former)

●MXs185.coreserver.jp2015-06-15 → 2026-08-05 · 2 obs

● 2015-06-15 11:05:52
● 2026-08-05 13:49:52

●A202.172.28.1862015-06-15 → 2026-08-05 · 2 obs

● 2015-06-15 11:05:52
● 2026-08-05 13:49:52

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
jp	a.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp...	-
coreserver.jp	vera.ns.cloudflare.com, gabriel.ns.cloudflare.com	-

✅ Authoritative Response

Server:173.245.58.147

NS records: vera.ns.cloudflare.com, gabriel.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for coreserver.jp (unsigned zone)

⏱️ Timing

Total: 573ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`202.172.28.186`
MX	1	`s185.coreserver.jp (pri: 10)`
TXT	1	`v=spf1 a:s185.coreserver.jp include:mxr.`

Analysis

Mail Server Role

s185.coreserver.jp serves as a mail server for s185.coreserver.jp.

IP Addresses

s185.coreserver.jp has exactly one IP address — 202.172.28.186.

sr-kido.jp, yagi.be, mail.tokyoworkshop.com plus two other host names have IP numbers in common with s185.coreserver.jp.

Mail Servers

s185.coreserver.jp uses exactly one mail server, which is s185.coreserver.jp.

s185.coreserver.jp carries a single IP number, which is 202.172.28.186.

s185.coreserver.jp - robtex.com