studycoach.co.jp - robtex.com

studycoach.co.jp

DNSSEC⚠️ Not signed
A183.181.83.129🇯🇵 XSERVER-AS183.181.80.0/22 XSERVER Inc.
PTRsv10128.xserver.jp
NSns1.xserver.jp ⭐
A202.226.36.164🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.
A202.226.36.170🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.
A202.226.36.246🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.
PTRns1.xserver.jp
NSns2.xserver.jp
A35.72.43.26🇯🇵 Amazon35.72.0.0/13 EC2 NRT prefix
PTRns2.xserver.jp
NSns3.xserver.jp
A202.226.36.247🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.
PTRns3.xserver.jp
NSns4.xserver.jp
A183.90.224.226🇯🇵 XSERVER-AS183.90.224.0/20 XSERVER Inc.
A183.90.224.230🇯🇵 XSERVER-AS183.90.224.0/20 XSERVER Inc.
A202.226.39.247🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.
PTRns4.xserver.jp
NSns5.xserver.jp
A157.112.182.218🇯🇵 XSERVER-AS157.112.176.0/21 XSERVER Inc.
A157.112.182.220🇯🇵 XSERVER-AS157.112.176.0/21 XSERVER Inc.
A202.226.37.247🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.
PTRns5.xserver.jp
MXstudycoach.co.jp ⭐
A183.181.83.129🇯🇵 XSERVER-AS183.181.80.0/22 XSERVER Inc.
PTRsv10128.xserver.jp
MXaspmx.l.google.com(1)
A2607:f8b0:4004:c1d::1b🇺🇸 Google2607:f8b0:4004::/48
PTRww-in-f27.1e100.net
A64.233.180.27🇺🇸 Google64.233.180.0/24
PTRon-in-f27.1e100.net
PTRpe-in-f27.1e100.net
MXalt1.aspmx.l.google.com(5)
A2800:3f0:4003:c0f::1b🇨🇱 Google2800:3f0:4003::/48
A108.177.123.27🇺🇸 Google108.177.123.0/24
PTRlcscld-in-f27.1e100.net
MXalt2.aspmx.l.google.com(5)
A2607:f8b0:4023:3003::1a🇺🇸 Google2607:f8b0::/32
PTRyulnkjt-in-f26.1e100.net
A172.253.145.26🇺🇸 Google172.253.145.0/24
PTRyulnkjt-in-f26.1e100.net
MXalt3.aspmx.l.google.com(10)
A2a00:1450:4009:c0f::1b🇬🇧 Google2a00:1450:4009::/48
PTRyulhrs-in-f27.1e100.net
A192.178.223.26🇺🇸 Google192.178.223.0/24
PTRyulhrs-in-f26.1e100.net
MXalt4.aspmx.l.google.com(10)
A2a00:1450:4025:c01::1b🇵🇱 Google2a00:1450:4025::/48
PTRrd-in-f27.1e100.net
A142.250.147.27🇺🇸 Google142.250.147.0/24
PTRrd-in-f27.1e100.net
TXTv=spf1 +a:sv10128.xserver.jp +a:studycoach.co.jp +mx include:spf.sender.xserv...
TXTgoogle-site-verification=aVMgpu31aVoNY6LbThcX3tUuIg3fAMUYUEKk9usbDzY
SOAns1.xserver.jproot@xserver.jp serial=0

co.jp

DNSSEC⚠️ Not signed
TXTco.jp.
WOT: SAFE (58/100)

MX for

studycoach.co.jp

Same first word

studycoach.co.jp

Similar names

coachdusty.com

DNS History

12 records (12 active, 0 former)

NSns1.xserver.jpns2.xserver.jpns3.xserver.jpns4.xserver.jpns5.xserver.jpMXalt1.aspmx.l.google.comalt2.aspmx.l.google.comalt3.aspmx.l.google.comalt4.aspmx.l.google.comaspmx.l.google.comstudycoach.co.jpA183.181.83.129
●NSns1.xserver.jp2026-04-04 → 2026-05-02 · 2 obs
● 2026-04-04 00:15:30
● 2026-05-02 10:04:04
●NSns2.xserver.jp2026-04-04 → 2026-05-02 · 2 obs
● 2026-04-04 00:15:30
● 2026-05-02 10:04:04
●NSns3.xserver.jp2026-04-04 → 2026-05-02 · 2 obs
● 2026-04-04 00:15:30
● 2026-05-02 10:04:04
●NSns4.xserver.jp2026-04-04 → 2026-05-02 · 2 obs
● 2026-04-04 00:15:30
● 2026-05-02 10:04:04
●NSns5.xserver.jp2026-04-04 → 2026-05-02 · 2 obs
● 2026-04-04 00:15:30
● 2026-05-02 10:04:04
●MXalt1.aspmx.l.google.com2026-04-04 → 2026-05-02 · 2 obs
● 2026-04-04 00:15:30
● 2026-05-02 10:04:04
●MXalt2.aspmx.l.google.com2026-04-04 → 2026-05-02 · 2 obs
● 2026-04-04 00:15:30
● 2026-05-02 10:04:04
●MXalt3.aspmx.l.google.com2026-04-04 → 2026-05-02 · 2 obs
● 2026-04-04 00:15:30
● 2026-05-02 10:04:04
●MXalt4.aspmx.l.google.com2026-04-04 → 2026-05-02 · 2 obs
● 2026-04-04 00:15:30
● 2026-05-02 10:04:04
●MXaspmx.l.google.com2026-04-04 → 2026-05-02 · 2 obs
● 2026-04-04 00:15:30
● 2026-05-02 10:04:04
●MXstudycoach.co.jp2026-04-04 → 2026-05-02 · 2 obs
● 2026-04-04 00:15:30
● 2026-05-02 10:04:04
●A183.181.83.1292026-04-04 → 2026-05-02 · 2 obs
● 2026-04-04 00:15:30
● 2026-05-02 10:04:04

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
jpa.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp...-
studycoach.co.jpns4.xserver.jp, ns1.xserver.jp, ns3.xserver.jp, ns2.xserver.jp...11 records

✅ Authoritative Response

Server:183.90.224.226

NS records: ns4.xserver.jp, ns1.xserver.jp, ns3.xserver.jp, ns2.xserver.jp, ns5.xserver.jp

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for studycoach.co.jp (unsigned zone)

⏱️ Timing

Total: 949ms | Queries: -

📄 Records

TypeCountSample Data
A1183.181.83.129
NS5ns5.xserver.jp, ns3.xserver.jp...
MX6alt1.aspmx.l.google.com (pri: 5), alt3.aspmx.l.google.com (pri: 10)...
TXT2v=spf1 +a:sv10128.xserver.jp +a:studycoa, google-site-verification=aVMgpu31aVoNY6L
SOA1ns1.xserver.jp root.xserver.jp

📌 Glue Records Collected

Total: 11

Out-of-bailiwick: 11 (ns5.xserver.jp, ns5.xserver.jp, ns5.xserver.jp...)

Analysis

Mail Server Role

The mail server for studycoach.co.jp is studycoach.co.jp.

aspmx.l.google.com, alt1.aspmx.l.google.com and alt2.aspmx.l.google.com are commonly used as mail servers in conjunction with studycoach.co.jp.

IP Addresses

studycoach.co.jp maps to IP address 183.181.83.129.

Other host names, for instance best-quality.net, asia-e.co.jp, dokkai.net, www.sento.co.jp and sv10128.xserver.jp share IP numbers with studycoach.co.jp.

Name Servers

studycoach.co.jp delegates to five name servers: ns1.xserver.jp, ns2.xserver.jp, ns3.xserver.jp, ns4.xserver.jp and ns5.xserver.jp.

studycoach.co.jp at least partially shares name servers with other domains such as mie-denkyo.info, exe-tokyo.com, ifour.co.jp, astro9.com and my-travel-style.com.

Host names with three IPs

Host ns1.xserver.jp points to 202.226.36.164, 202.226.36.170 and 202.226.36.246

Host ns4.xserver.jp points to 183.90.224.226, 183.90.224.230 and 202.226.39.247

Host ns5.xserver.jp points to 157.112.182.218, 157.112.182.220 and 202.226.37.247

Host names with one IP

Host ns2.xserver.jp points to 35.72.43.26

Host ns3.xserver.jp points to 202.226.36.247

Mail Servers

Six mail servers handle studycoach.co.jp: studycoach.co.jp, aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com, alt3.aspmx.l.google.com and alt4.aspmx.l.google.com.

studycoach.co.jp shares mail servers with other domains at least in part, for instance ns500731.ns500671.ns500731.ns500742.ns500671.ns500671.ns500742.ns500705.ns500704.ns500671.ns500688.ns500291.ns500291.ns500671.ns500291.ns500291.ns500131.lustychickser.com, ns500731.ns500754.ns500731.ns500671.ns500705.ns500671.ns500705.ns500671.ns500688.ns500678.ns500666.ns500653.ns500153.tenderladiesbz.com, ns500698.ns500759.ns500758.ns500759.ns500736.ns500698.ns500698.ns500735.ns500736.ns500576.ns500708.ns500576.ns500686.ns500619.trackreceptor.com, ns500758.ns500758.ns500759.ns500698.ns500736.ns500698.ns500698.ns500735.ns500708.ns500708.ns500698.ns500576.ns500576.ns500619.ns500576.trackreceptor.com and ns500698.ns500698.ns500759.ns500759.ns500698.ns500735.ns500736.ns500698.ns500708.ns500708.ns500576.ns500652.ns500576.trackreceptor.com.

These mail servers are commonly used together with aspmx2.googlemail.com and aspmx3.googlemail.com.

Host names with two IP numbers:

aspmx.l.google.com points to 2607:f8b0:4004:c1d::1b and 64.233.180.27.

alt1.aspmx.l.google.com points to 2800:3f0:4003:c0f::1b and 108.177.123.27.

alt2.aspmx.l.google.com points to 2607:f8b0:4023:3003::1a and 172.253.145.26.

alt3.aspmx.l.google.com points to 2a00:1450:4009:c0f::1b and 192.178.223.26.

alt4.aspmx.l.google.com points to 2a00:1450:4025:c01::1b and 142.250.147.27.

Host names with one IP number:

studycoach.co.jp points to 183.181.83.129.