`bluebear-school.com`

DNSSEC	⚠️ Not signed
A	52.197.86.50^{🇯🇵 Amazon52.196.0.0/14 EC2 NRT prefix}
		PTR	`ec2-52-197-86-50.ap-northeast-1.compute.amazonaws.com`
A	54.65.232.50^{🇯🇵 Amazon54.64.0.0/15 EC2 NRT prefix}
NS	`ns-1596.awsdns-07.co.uk` ⭐
		A	2600:9000:5306:3c00::1^{🇺🇸 Amazon2600:9000:5306::/48 - CloudFront}
			PTR	`ns-1596.awsdns-07.co.uk`
		A	205.251.198.60^{🇺🇸 Amazon205.251.198.0/24 prefix}
			PTR	`ns-1596.awsdns-07.co.uk`
NS	`ns-1402.awsdns-47.org`
		A	2600:9000:5305:7a00::1^{🇺🇸 Amazon2600:9000:5305::/48 - CloudFront}
			PTR	`ns-1402.awsdns-47.org`
		A	205.251.197.122^{🇺🇸 Amazon205.251.197.0/24 prefix}
			PTR	`ns-1402.awsdns-47.org`
NS	`ns-408.awsdns-51.com`
		A	2600:9000:5301:9800::1^{🇺🇸 Amazon2600:9000:5301::/48 - CloudFront}
			PTR	`ns-408.awsdns-51.com`
		A	205.251.193.152^{🇺🇸 Amazon205.251.193.0/24 prefix}
			PTR	`ns-408.awsdns-51.com`
NS	`ns-881.awsdns-46.net`
		A	2600:9000:5303:7100::1^{🇺🇸 Amazon2600:9000:5303::/48 - CloudFront}
			PTR	`ns-881.awsdns-46.net`
		A	205.251.195.113^{🇺🇸 Amazon205.251.195.0/24 prefix}
			PTR	`ns-881.awsdns-46.net`
MX	`dmail.kagoya.net` ⭐
		A	210.134.51.6^{🇯🇵 KAGOYAJAPAN210.134.48.0/20 KAGOYA Japan Inc.}
			PTR	`dmail01.kagoya.net`
		A	210.134.51.7^{🇯🇵 KAGOYAJAPAN210.134.48.0/20 KAGOYA Japan Inc.}
			PTR	`dmail02.kagoya.net`
		A	210.134.58.253^{🇯🇵 KAGOYAJAPAN210.134.48.0/20 KAGOYA Japan Inc.}
			PTR	`dmail03.kagoya.net`
		A	210.134.58.254^{🇯🇵 KAGOYAJAPAN210.134.48.0/20 KAGOYA Japan Inc.}
			PTR	`dmail04.kagoya.net`
TXT	`v=spf1 +ip4:13.112.211.41 include:kagoya.net ~all`
SOA	`ns-1596.awsdns-07.co.uk`awsdns-hostmaster@amazon.com serial=1

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1771291435

Same first word

bluebear-school.com

DNS History

18 records (7 active, 11 former)

●NSns-1402.awsdns-47.org2017-12-18 → 2026-03-21 · 3 obs

○ 2016-12-18 17:45:30
● 2017-12-18 14:27:32
● 2026-03-21 06:26:06

●NSns-1596.awsdns-07.co.uk2017-12-18 → 2026-03-21 · 3 obs

○ 2016-12-18 17:45:30
● 2017-12-18 14:27:32
● 2026-03-21 06:26:06

●NSns-408.awsdns-51.com2017-12-18 → 2026-03-21 · 3 obs

○ 2016-12-18 17:45:30
● 2017-12-18 14:27:32
● 2026-03-21 06:26:06

●NSns-881.awsdns-46.net2017-12-18 → 2026-03-21 · 3 obs

○ 2016-12-18 17:45:30
● 2017-12-18 14:27:32
● 2026-03-21 06:26:06

○NSns.kagoya.net2016-12-18 → 2016-12-18 · 3 obs

● 2016-12-18 17:45:30
○ 2017-12-18 14:27:32
○ 2026-03-21 06:26:06

○NSns0.kagoya.net2016-12-18 → 2016-12-18 · 3 obs

● 2016-12-18 17:45:30
○ 2017-12-18 14:27:32
○ 2026-03-21 06:26:06

○NSns1.kagoya.net2016-12-18 → 2016-12-18 · 3 obs

● 2016-12-18 17:45:30
○ 2017-12-18 14:27:32
○ 2026-03-21 06:26:06

●MXdmail.kagoya.net2016-12-18 → 2026-03-21 · 2 obs

● 2016-12-18 17:45:30
● 2026-03-21 06:26:06

○A13.114.43.302026-02-20 → 2026-03-21 · 2 obs

○ 2026-02-20 17:08:08
○ 2026-03-21 06:26:06

○A13.158.250.612026-03-11 → 2026-03-11 · 4 obs

○ 2026-02-20 17:08:08
● 2026-03-11 11:49:40
○ 2026-03-21 06:26:02
○ 2026-03-21 06:26:06

○A13.193.37.962026-02-20 → 2026-02-20 · 4 obs

○ 2017-12-18 14:27:32
● 2026-02-20 17:08:08
○ 2026-03-11 11:49:40
○ 2026-03-21 06:26:06

○A13.230.113.592026-02-20 → 2026-03-21 · 2 obs

○ 2026-02-20 17:08:08
○ 2026-03-21 06:26:06

○A133.18.9.1292016-12-18 → 2016-12-18 · 3 obs

● 2016-12-18 17:45:30
○ 2017-12-18 14:27:32
○ 2026-03-21 06:26:06

○A18.182.72.2382026-02-20 → 2026-02-20 · 4 obs

○ 2017-12-18 14:27:32
● 2026-02-20 17:08:08
○ 2026-03-11 11:49:40
○ 2026-03-21 06:26:06

●A52.197.86.502026-03-21 → 2026-03-21 · 3 obs

○ 2026-03-11 11:49:40
● 2026-03-21 06:26:02
● 2026-03-21 06:26:06

○A52.199.194.1622017-12-18 → 2017-12-18 · 4 obs

○ 2016-12-18 17:45:30
● 2017-12-18 14:27:32
○ 2026-02-20 17:08:08
○ 2026-03-21 06:26:06

○A54.199.157.1412017-12-18 → 2017-12-18 · 4 obs

○ 2016-12-18 17:45:30
● 2017-12-18 14:27:32
○ 2026-02-20 17:08:08
○ 2026-03-21 06:26:06

●A54.65.232.502026-03-11 → 2026-03-21 · 3 obs

○ 2026-02-20 17:08:08
● 2026-03-11 11:49:40
● 2026-03-21 06:26:06

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	k.gtld-servers.net, b.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net...	-
bluebear-school.com	ns-408.awsdns-51.com, ns-881.awsdns-46.net, ns-1596.awsdns-07.co.uk, ns-1402.awsdns-47.org	1 record

✅ Authoritative Response

Server: 205.251.198.60

NS records: ns-408.awsdns-51.com, ns-881.awsdns-46.net, ns-1596.awsdns-07.co.uk, ns-1402.awsdns-47.org

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for bluebear-school.com (unsigned zone)

⏱️ Timing

Total: 578ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`54.65.232.50, 52.197.86.50`
NS	4	`ns-1402.awsdns-47.org, ns-1596.awsdns-07.co.uk...`
MX	1	`dmail.kagoya.net (pri: 10)`
TXT	1	`v=spf1 +ip4:13.112.211.41 include:kagoya`
SOA	1	`ns-1596.awsdns-07.co.uk awsdns-hostmaste`

📌 Glue Records Collected

Total: 1

Out-of-bailiwick: 1 (ns-408.awsdns-51.com)

Analysis

IP Addresses

bluebear-school.com has two IP numbers: 52.197.86.50 and 54.65.232.50.

Other host names, for instance kealaokamaile.jp, hashikawa.co, www.acehouse.jp, kgroof.com and i-litra.com share IP numbers with bluebear-school.com.

Name Servers

bluebear-school.com delegates to four name servers: ns-408.awsdns-51.com, ns-881.awsdns-46.net, ns-1402.awsdns-47.org and ns-1596.awsdns-07.co.uk.

bluebear-school.com at least partially shares name servers with other domains, including d1mtban7vmmmk2.cloudfront.net, alltransteck.com, andromeda.net, loud.org and bodygram.cc.

Host names with two IP numbers: ns-408.awsdns-51.com points to 2600:9000:5301:9800::1 and 205.251.193.152; ns-881.awsdns-46.net points to 2600:9000:5303:7100::1 and 205.251.195.113; ns-1402.awsdns-47.org points to 2600:9000:5305:7a00::1 and 205.251.197.122; ns-1596.awsdns-07.co.uk points to 2600:9000:5306:3c00::1 and 205.251.198.60.

Mail Servers

A single mail server handles bluebear-school.com, dmail.kagoya.net.

bluebear-school.com shares the same mail server setup as other domains, for instance nakaoka-pdc.com, tack-ken.co.jp, inran.tv, toyo0101.com and kyoto-design.net.

dmail.kagoya.net maps to four IP numbers: 210.134.51.6, 210.134.51.7, 210.134.58.253 and 210.134.58.254.

bluebear-school.com - robtex.com