`s157.coreserver.jp`

DNSSEC	⚠️ Not signed
A	202.172.28.158^{🇯🇵 DRNET202.172.24.0/21}
		PTR	`s157.coreserver.jp`
MX	`s157.coreserver.jp` ⭐
		A	202.172.28.158^{🇯🇵 DRNET202.172.24.0/21}
			PTR	`s157.coreserver.jp`
TXT	`v=spf1 a:s157.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 #62350 globally
rank #1199 in the tld
WOT: SAFE (58/100)
📈 Tranco rank: #41,965

PTR for

158.28.172.202.in-addr.arpa

MX for

s157.coreserver.jp

Previously MX for

net-tokyo.net

Similar names

175s.com

s715.cn

51s7.com

751s.cc

751s.tv

5s71.com

DNS History

2 records (2 active, 0 former)

●MXs157.coreserver.jp2015-07-25 → 2026-05-11 · 2 obs

● 2015-07-25 01:09:36
● 2026-05-11 09:13:12

●A202.172.28.1582015-07-25 → 2026-05-11 · 2 obs

● 2015-07-25 01:09:36
● 2026-05-11 09:13:12

🔍 DNS Trace

📋 Delegation Chain

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

✅ Authoritative Response

Server:162.159.44.244

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: 641ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`202.172.28.158`
MX	1	`s157.coreserver.jp (pri: 10)`
TXT	1	`v=spf1 a:s157.coreserver.jp include:mxr.`

Analysis

Mail Server Role

s157.coreserver.jp serves as the mail server for s157.coreserver.jp.

IP Addresses

s157.coreserver.jp points to IP number: 202.172.28.158.

Other host names such as graps.co.jp, 1101.co.jp, aqapps.com, hostmaster.sacfip.com and sunny-side.info share IPs with s157.coreserver.jp.

Mail Servers

s157.coreserver.jp is handled by a single mail server, s157.coreserver.jp.

s157.coreserver.jp points to a single IP: 202.172.28.158.

s157.coreserver.jp - robtex.com