`b41.coreserver.jp`

DNSSEC	⚠️ Not signed
A	202.172.25.42^{🇯🇵 DRNET202.172.24.0/21}
		PTR	`b41.coreserver.jp`
MX	`b41.coreserver.jp` ⭐
		A	202.172.25.42^{🇯🇵 DRNET202.172.24.0/21}
			PTR	`b41.coreserver.jp`
TXT	`v=spf1 a:b41.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	104.18.24.150, 104.18.25.150
SOA	`gabriel.ns.cloudflare.com`dns@cloudflare.com serial=2399147664

WOT: SAFE (70/100)
rank #62470 globally
rank #1150 in the tld
WOT: SAFE (70/100)
📈 Tranco rank: #75,554

PTR for

42.25.172.202.in-addr.arpa

MX for

saadusa.com

b41.coreserver.jp

storesaad.info

Same first word

b41.org

b41.net

b41.site

b41.nl

b41.com.cn

b41.cn

b41.xyz

b41.de

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4b1.de

b14.org

b14.it

4b1.com

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14b.org

14b.co.uk

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b14.space

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1b4.org

14b.co

b14.com

b14.me

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1b4.cn

14b.is

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41b.de

b14.fr

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b14.dk

41b.com

b14.eu

14b.cc

4b1.ru

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b14.at

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b14.net

DNS History

2 records (2 active, 0 former)

●MXb41.coreserver.jp2015-07-05 → 2026-03-25 · 2 obs

● 2015-07-05 03:59:54
● 2026-03-25 02:19:16

●A202.172.25.422015-07-05 → 2026-03-25 · 2 obs

● 2015-07-05 03:59:54
● 2026-03-25 02:19:16

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
jp	e.dns.jp, g.dns.jp, c.dns.jp, a.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: 635ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`202.172.25.42`
MX	1	`b41.coreserver.jp (pri: 10)`
TXT	1	`v=spf1 a:b41.coreserver.jp include:mxr.v`

Analysis

Mail Server Role

b41.coreserver.jp serves as the mail server for saadusa.com, b41.coreserver.jp and storesaad.info.

IP Addresses

b41.coreserver.jp resolves to a single IP address: 202.172.25.42.

Other host names including alcalisoft.net, buyers-selection.com, rasora-sapporo.com, www.dousoukai-mie-ueng.org and mild-coffee.jp share IP numbers with b41.coreserver.jp.

Mail Servers

A single mail server handles b41.coreserver.jp.

b41.coreserver.jp uses the same mail server setup as other domains, for example saadusa.com and storesaad.info.

b41.coreserver.jp points to a single IP: 202.172.25.42.

b41.coreserver.jp - robtex.com