`s123.coreserver.jp`

DNSSEC	⚠️ Not signed
A	202.172.28.124^{🇯🇵 DRNET202.172.24.0/21}
		PTR	`s123.coreserver.jp`
MX	`s123.coreserver.jp` ⭐
		A	202.172.28.124^{🇯🇵 DRNET202.172.24.0/21}
			PTR	`s123.coreserver.jp`
TXT	`v=spf1 a:s123.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	`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=2400112445

WOT: SAFE (59/100)
rank #61462 globally
rank #1151 in the tld
WOT: SAFE (58/100)
📈 Tranco rank: #42,044

PTR for

124.28.172.202.in-addr.arpa

MX for

s123.coreserver.jp

Same first word

s123.de

s123.net

Similar names

123s.de

123s.info

2s13.com

123s.link

123s.ch

s231.com

312s.com

123s.eu

12s3.com

s213.com

123s.net

2s31.com

s312.cc

123s.com

s312.com

s231.cn

123s.co

3s12.com

231s.com

s132.cn

132s.com

s132.com

123s.org

1s32.com

321s.com

s321.duckdns.org

DNS History

2 records (2 active, 0 former)

●MXs123.coreserver.jp2015-05-16 → 2026-04-15 · 2 obs

● 2015-05-16 05:04:56
● 2026-04-15 05:54:02

●A202.172.28.1242015-05-16 → 2026-04-15 · 2 obs

● 2015-05-16 05:04:56
● 2026-04-15 05:54:02

🔍 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:172.64.32.147

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: 840ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`202.172.28.124`
MX	1	`s123.coreserver.jp (pri: 10)`
TXT	1	`v=spf1 a:s123.coreserver.jp include:mxr.`

Analysis

Mail Server Role

The mail server for s123.coreserver.jp is s123.coreserver.jp.

IP Addresses

s123.coreserver.jp points to a single IP address: 202.172.28.124.

Other host names such as hostmaster.be-self.com, yoyaku-msystem.com, mjr.jp, goyatei.com and surv.co.jp share IPs with s123.coreserver.jp.

Mail Servers

One mail server handles s123.coreserver.jp; that server is s123.coreserver.jp.

s123.coreserver.jp points to a single IP number: 202.172.28.124.

s123.coreserver.jp - robtex.com