ybschool.info - robtex.com

ybschool.info

DNSSEC⚠️ Not signed
A162.43.116.113🇯🇵 XSERVER-AS162.43.112.0/21 XSERVER Inc.
PTRsv13112.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
MXybschool.info ⭐
A162.43.116.113🇯🇵 XSERVER-AS162.43.112.0/21 XSERVER Inc.
PTRsv13112.xserver.jp
TXTv=spf1 +a:sv13112.xserver.jp +a:ybschool.info +mx include:spf.sender.xserver....
SOAns1.xserver.jproot@xserver.jp serial=0

info

DNSSEC🔒 Signed (DS record present)
NSa0.info.afilias-nst.info ⭐
NSa2.info.afilias-nst.info
NSb0.info.afilias-nst.org ⚠️ Not in parent delegation
NSb2.info.afilias-nst.org ⚠️ Not in parent delegation
NSc0.info.afilias-nst.info
NSd0.info.afilias-nst.org ⚠️ Not in parent delegation
SOAa0.info.afilias-nst.infohostmaster@donuts.email serial=1775930901

MX for

ybschool.info

Same first word

ybschool.info
ybschool.cn

Similar names

byschool.com
schoolyb.com
schoolby.com

DNS History

15 records (7 active, 8 former)

20162017201820192020202120222023202420252026NSns1.xserver.jpns2.xserver.jpns3.xserver.jpns4.xserver.jpns5.xserver.jpns1.minibird.jpns2.minibird.jpns3.minibird.jpuns01.lolipop.jpuns02.lolipop.jpMXybschool.infomx01.lolipop.jpA162.43.116.113112.78.117.16157.7.107.70
○NSns1.minibird.jp2015-06-22 → 2017-02-19 · 4 obs
● 2015-06-22 08:21:08
● 2017-02-19 15:02:48
○ 2019-04-29 09:33:46
○ 2026-04-11 18:19:26
●NSns1.xserver.jp2026-02-21 → 2026-04-11 · 3 obs
○ 2019-04-29 09:33:46
● 2026-02-21 13:36:22
● 2026-04-11 18:19:26
○NSns2.minibird.jp2015-06-22 → 2017-02-19 · 4 obs
● 2015-06-22 08:21:08
● 2017-02-19 15:02:48
○ 2019-04-29 09:33:46
○ 2026-04-11 18:19:26
●NSns2.xserver.jp2026-02-21 → 2026-04-11 · 3 obs
○ 2019-04-29 09:33:46
● 2026-02-21 13:36:22
● 2026-04-11 18:19:26
○NSns3.minibird.jp2015-06-22 → 2017-02-19 · 4 obs
● 2015-06-22 08:21:08
● 2017-02-19 15:02:48
○ 2019-04-29 09:33:46
○ 2026-04-11 18:19:26
●NSns3.xserver.jp2026-02-21 → 2026-04-11 · 3 obs
○ 2019-04-29 09:33:46
● 2026-02-21 13:36:22
● 2026-04-11 18:19:26
●NSns4.xserver.jp2026-02-21 → 2026-04-11 · 3 obs
○ 2019-04-29 09:33:46
● 2026-02-21 13:36:22
● 2026-04-11 18:19:26
●NSns5.xserver.jp2026-02-21 → 2026-04-11 · 3 obs
○ 2019-04-29 09:33:46
● 2026-02-21 13:36:22
● 2026-04-11 18:19:26
○NSuns01.lolipop.jp2019-04-29 → 2019-04-29 · 4 obs
○ 2017-02-19 15:02:48
● 2019-04-29 09:33:46
○ 2026-02-21 13:36:22
○ 2026-04-11 18:19:26
○NSuns02.lolipop.jp2019-04-29 → 2019-04-29 · 4 obs
○ 2017-02-19 15:02:48
● 2019-04-29 09:33:46
○ 2026-02-21 13:36:22
○ 2026-04-11 18:19:26
○MXmx01.lolipop.jp2019-04-29 → 2019-04-29 · 4 obs
○ 2017-02-19 15:02:48
● 2019-04-29 09:33:46
○ 2026-02-21 13:36:22
○ 2026-04-11 18:19:26
●MXybschool.info2015-06-22 → 2026-04-11 · 5 obs
● 2015-06-22 08:21:08
● 2017-02-19 15:02:48
○ 2019-04-29 09:33:46
● 2026-02-21 13:36:22
● 2026-04-11 18:19:26
○A112.78.117.162015-06-22 → 2017-02-19 · 4 obs
● 2015-06-22 08:21:08
● 2017-02-19 15:02:48
○ 2019-04-29 09:33:46
○ 2026-04-11 18:19:26
○A157.7.107.702019-04-29 → 2019-04-29 · 4 obs
○ 2017-02-19 15:02:48
● 2019-04-29 09:33:46
○ 2026-02-21 13:36:22
○ 2026-04-11 18:19:26
●A162.43.116.1132026-02-21 → 2026-04-11 · 3 obs
○ 2019-04-29 09:33:46
● 2026-02-21 13:36:22
● 2026-04-11 18:19:26

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
infoa0.info.afilias-nst.info, c0.info.afilias-nst.info, a2.info.afilias-nst.info-
ybschool.infons5.xserver.jp, ns1.xserver.jp, ns4.xserver.jp, ns2.xserver.jp...-

✅ Authoritative Response

Server:35.72.43.26

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for ybschool.info (unsigned zone)

⏱️ Timing

Total: 3188ms | Queries: -

📄 Records

TypeCountSample Data
A1162.43.116.113
NS5ns2.xserver.jp, ns4.xserver.jp...
MX1ybschool.info (pri: 0)
TXT1v=spf1 +a:sv13112.xserver.jp +a:ybschool
SOA1ns1.xserver.jp root.xserver.jp

Analysis

Mail Server Role

For ybschool.info, the mail server is ybschool.info.

IP Addresses

ybschool.info resolves to one IP number: 162.43.116.113.

other host names including yjcard.co.jp, nana-kitchen.com, www.harmonia.co.jp, www.waikiki-yokocho.com and harmonia.co.jp share IP numbers with ybschool.info.

Name Servers

ybschool.info is delegated to five name servers: ns1.xserver.jp, ns2.xserver.jp, ns3.xserver.jp, ns4.xserver.jp and ns5.xserver.jp.

ybschool.info at least partially shares name servers with other domains, for instance tsurikatsu.com, isjapan.com, concord-group.co.jp, nichifuji.com and 2996.info.

Host names with three IP numbers:

ns1.xserver.jp points to: 202.226.36.164, 202.226.36.170 and 202.226.36.246; ns4.xserver.jp points to: 183.90.224.226, 183.90.224.230 and 202.226.39.247; ns5.xserver.jp points to: 157.112.182.218, 157.112.182.220 and 202.226.37.247.

Host names with one IP number:

ns2.xserver.jp points to: 35.72.43.26; ns3.xserver.jp points to: 202.226.36.247.

Mail Servers

ybschool.info is served by a single mail server, ybschool.info.

ybschool.info resolves to IP 162.43.116.113.