webclass.jp - dns.ninja

`webclass.jp`

DNSSEC	⚠️ Not signed
A	13.193.0.16^{🇺🇸 Amazon13.193.0.0/17 EC2 Prefix}
		PTR	`ec2-13-193-0-16.ap-northeast-1.compute.amazonaws.com`
A	35.78.29.73^{🇯🇵 Amazon35.72.0.0/13 EC2 NRT prefix}
NS	`ns-1131.awsdns-13.org` ⭐
		A	2600:9000:5304:6b00::1^{🇺🇸 Amazon2600:9000:5304::/48 - CloudFront}
			PTR	`ns-1131.awsdns-13.org`
		A	205.251.196.107^{🇺🇸 Amazon205.251.196.0/24 prefix}
			PTR	`ns-1131.awsdns-13.org`
NS	`ns-1762.awsdns-28.co.uk`
		A	2600:9000:5306:e200::1^{🇺🇸 Amazon2600:9000:5306::/48 - CloudFront}
			PTR	`ns-1762.awsdns-28.co.uk`
		A	205.251.198.226^{🇺🇸 Amazon205.251.198.0/24 prefix}
			PTR	`ns-1762.awsdns-28.co.uk`
NS	`ns-363.awsdns-45.com`
		A	2600:9000:5301:6b00::1^{🇺🇸 Amazon2600:9000:5301::/48 - CloudFront}
			PTR	`ns-363.awsdns-45.com`
		A	205.251.193.107^{🇺🇸 Amazon205.251.193.0/24 prefix}
			PTR	`ns-363.awsdns-45.com`
NS	`ns-823.awsdns-38.net`
		A	2600:9000:5303:3700::1^{🇺🇸 Amazon2600:9000:5303::/48 - CloudFront}
			PTR	`ns-823.awsdns-38.net`
		A	205.251.195.55^{🇺🇸 Amazon205.251.195.0/24 prefix}
			PTR	`ns-823.awsdns-38.net`
MX	`aspmx.l.google.com` ⭐
		A	2607:f8b0:4004:c1b::1b^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`wv-in-f27.1e100.net`
		A	142.251.163.26^{🇺🇸 Google142.251.163.0/24}
			PTR	`wv-in-f26.1e100.net`
MX	`alt1.aspmx.l.google.com`⁽²⁰⁾
		A	2800:3f0:4003:c0f::1b^{🇨🇱 Google2800:3f0:4003::/48}
		A	108.177.123.27^{🇺🇸 Google108.177.123.0/24}
			PTR	`lcscld-in-f27.1e100.net`
MX	`alt2.aspmx.l.google.com`⁽²⁰⁾
		A	2a00:1450:400b:c02::1b^{🇮🇪 Google2a00:1450:400b::/48}
			PTR	`dj-in-f27.1e100.net`
		A	172.253.116.27^{🇺🇸 Google172.253.116.0/24}
			PTR	`dj-in-f27.1e100.net`
MX	`aspmx2.googlemail.com`⁽³⁰⁾
		A	2800:3f0:4003:c0f::1b^{🇨🇱 Google2800:3f0:4003::/48}
		A	108.177.123.27^{🇺🇸 Google108.177.123.0/24}
			PTR	`lcscld-in-f27.1e100.net`
MX	`aspmx3.googlemail.com`⁽³⁰⁾
		A	2a00:1450:400b:c02::1a^{🇮🇪 Google2a00:1450:400b::/48}
			PTR	`dj-in-f26.1e100.net`
		A	172.253.116.27^{🇺🇸 Google172.253.116.0/24}
			PTR	`dj-in-f27.1e100.net`
MX	`aspmx4.googlemail.com`⁽³⁰⁾
		A	2a00:1450:4009:c0f::1b^{🇬🇧 Google2a00:1450:4009::/48}
			PTR	`yulhrs-in-f27.1e100.net`
		A	192.178.223.27^{🇺🇸 Google192.178.223.0/24}
			PTR	`yulhrs-in-f27.1e100.net`
MX	`aspmx5.googlemail.com`⁽³⁰⁾
		A	2a00:1450:400c:c23::1b^{🇧🇪 Google2a00:1450:400c::/48}
			PTR	`yubrupd-in-f27.1e100.net`
		A	172.253.157.27^{🇺🇸 Google172.253.0.0/16}
			PTR	`yubrupd-in-f27.1e100.net`
TXT	`google-site-verification=jpr4AMbM2wtNix3UWSIdGHaYpQH4EHG5i55KYDXE4lk`
TXT	`v=spf1 +a:perth.datapacific.co.jp +ip4:54.240.249.218/31 include:a.spf.so-ne...`
SOA	`ns-1131.awsdns-13.org`taira@datapacific.co.jp serial=10

`jp`

	DNSSEC	🔒 Signed (DS record present)
	NS	`z.dns.jp` ⭐
	NS	`a.dns.jp`
	NS	`b.dns.jp`
	NS	`c.dns.jp`
	NS	`d.dns.jp`
	NS	`e.dns.jp`
	NS	`f.dns.jp`
	NS	`g.dns.jp`
	NS	`h.dns.jp`
	SOA	`z.dns.jp`root@dns.jp serial=1781615702

Subdomains

natg-eclass.webclass.jp

siu.webclass.jp

kuhs.webclass.jp

ohkagakuen.webclass.jp

perth.webclass.jp

Same first word

webclass.eu

webclass.fr

webclass.ai

webclass.cl

webclass.ru

webclass.site

webclass.me

webclass.jp

webclass.com.br

webclass.be

webclass.net

webclass.uz

webclass.com

webclass.pl

webclass.co

webclass.gr

webclass.org

webclass.nl

webclass.ca

webclass.de

Similar names

wscables.com

classweb.com

classweb.de

bwcsales.com

classweb.org

classweb.net

lesscwab.com

wecslabs.com

classweb.ca

classweb.ru

DNS History

26 records (13 active, 13 former)

●NSns-1131.awsdns-13.org2026-03-31 → 2026-06-16 · 3 obs

○ 2017-09-02 15:42:34
● 2026-03-31 17:41:50
● 2026-06-16 13:54:04

●NSns-1762.awsdns-28.co.uk2026-03-31 → 2026-06-16 · 3 obs

○ 2017-09-02 15:42:34
● 2026-03-31 17:41:50
● 2026-06-16 13:54:04

●NSns-363.awsdns-45.com2026-03-31 → 2026-06-16 · 3 obs

○ 2017-09-02 15:42:34
● 2026-03-31 17:41:50
● 2026-06-16 13:54:04

●NSns-823.awsdns-38.net2026-03-31 → 2026-06-16 · 3 obs

○ 2017-09-02 15:42:34
● 2026-03-31 17:41:50
● 2026-06-16 13:54:04

○NSns0.xname.org2015-05-18 → 2017-09-02 · 4 obs

● 2015-05-18 11:34:40
● 2017-09-02 15:42:34
○ 2026-03-31 17:41:50
○ 2026-06-16 13:54:04

○NSns1.xname.org2015-05-18 → 2017-09-02 · 4 obs

● 2015-05-18 11:34:40
● 2017-09-02 15:42:34
○ 2026-03-31 17:41:50
○ 2026-06-16 13:54:04

○NSns2.xname.org2015-05-18 → 2017-09-02 · 4 obs

● 2015-05-18 11:34:40
● 2017-09-02 15:42:34
○ 2026-03-31 17:41:50
○ 2026-06-16 13:54:04

○NSperth.datapacific.co.jp2015-05-18 → 2017-09-02 · 4 obs

● 2015-05-18 11:34:40
● 2017-09-02 15:42:34
○ 2026-03-31 17:41:50
○ 2026-06-16 13:54:04

○NSperth.webclass.jp2015-05-18 → 2017-09-02 · 4 obs

● 2015-05-18 11:34:40
● 2017-09-02 15:42:34
○ 2026-03-31 17:41:50
○ 2026-06-16 13:54:04

●MXalt1.aspmx.l.google.com2015-05-18 → 2026-06-16 · 2 obs

● 2015-05-18 11:34:40
● 2026-06-16 13:54:04

●MXalt2.aspmx.l.google.com2015-05-18 → 2026-06-16 · 2 obs

● 2015-05-18 11:34:40
● 2026-06-16 13:54:04

●MXaspmx.l.google.com2015-05-18 → 2026-06-16 · 2 obs

● 2015-05-18 11:34:40
● 2026-06-16 13:54:04

●MXaspmx2.googlemail.com2015-05-18 → 2026-06-16 · 2 obs

● 2015-05-18 11:34:40
● 2026-06-16 13:54:04

●MXaspmx3.googlemail.com2015-05-18 → 2026-06-16 · 2 obs

● 2015-05-18 11:34:40
● 2026-06-16 13:54:04

●MXaspmx4.googlemail.com2015-05-18 → 2026-06-16 · 2 obs

● 2015-05-18 11:34:40
● 2026-06-16 13:54:04

●MXaspmx5.googlemail.com2015-05-18 → 2026-06-16 · 2 obs

● 2015-05-18 11:34:40
● 2026-06-16 13:54:04

○A13.159.159.1072026-03-31 → 2026-03-31 · 4 obs

○ 2017-09-02 15:42:34
● 2026-03-31 17:41:50
○ 2026-05-11 02:05:04
○ 2026-06-16 13:54:04

●A13.193.0.162026-06-11 → 2026-06-16 · 3 obs

○ 2026-06-06 13:13:30
● 2026-06-11 03:35:16
● 2026-06-16 13:54:04

○A13.230.146.2382026-03-31 → 2026-06-16 · 2 obs

○ 2026-03-31 17:41:50
○ 2026-06-16 13:54:04

○A18.177.187.952026-06-03 → 2026-06-06 · 5 obs

○ 2026-05-11 02:05:04
● 2026-06-03 07:55:48
● 2026-06-06 13:13:30
○ 2026-06-11 03:35:16
○ 2026-06-16 13:54:04

○A210.162.218.1142015-05-18 → 2017-09-02 · 4 obs

● 2015-05-18 11:34:40
● 2017-09-02 15:42:34
○ 2026-03-31 17:41:50
○ 2026-06-16 13:54:04

●A35.78.29.732026-06-03 → 2026-06-16 · 3 obs

○ 2026-05-11 02:05:04
● 2026-06-03 07:55:48
● 2026-06-16 13:54:04

○A35.78.31.2082026-03-31 → 2026-06-16 · 2 obs

○ 2026-03-31 17:41:50
○ 2026-06-16 13:54:04

○A54.150.118.1752026-03-31 → 2026-03-31 · 4 obs

○ 2017-09-02 15:42:34
● 2026-03-31 17:41:50
○ 2026-05-11 02:05:04
○ 2026-06-16 13:54:04

○A54.249.134.532026-05-11 → 2026-05-11 · 4 obs

○ 2026-03-31 17:41:50
● 2026-05-11 02:05:04
○ 2026-06-03 07:55:48
○ 2026-06-16 13:54:04

○A57.181.107.462026-05-11 → 2026-05-11 · 4 obs

○ 2026-03-31 17:41:50
● 2026-05-11 02:05:04
○ 2026-06-03 07:55:48
○ 2026-06-16 13:54:04

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
jp	a.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp...	-
webclass.jp	ns-1762.awsdns-28.co.uk, ns-363.awsdns-45.com, ns-823.awsdns-38.net, ns-1131.awsdns-13.org	-

✅ Authoritative Response

Server:205.251.198.226

NS records: ns-1762.awsdns-28.co.uk, ns-363.awsdns-45.com, ns-823.awsdns-38.net, ns-1131.awsdns-13.org

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for webclass.jp (unsigned zone)

⏱️ Timing

Total: 1442ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`13.193.0.16, 35.78.29.73`
NS	4	`ns-1131.awsdns-13.org, ns-1762.awsdns-28.co.uk...`
MX	7	`aspmx.l.google.com (pri: 10), alt1.aspmx.l.google.com (pri: 20)...`
TXT	2	`google-site-verification=jpr4AMbM2wtNix3, v=spf1 +a:perth.datapacific.co.jp +ip4:`
SOA	1	`ns-1131.awsdns-13.org taira.datapacific.`

Analysis

Hierarchy

webclass.jp has five child domains: natg-eclass.webclass.jp, siu.webclass.jp, kuhs.webclass.jp, ohkagakuen.webclass.jp and perth.webclass.jp.

IP Addresses

webclass.jp has two IP addresses: 13.193.0.16 and 35.78.29.73

Other host names, such as www.fc-kamei.net, share IP numbers with webclass.jp.

Name Servers

Four name servers handle the delegation for webclass.jp: ns-363.awsdns-45.com, ns-823.awsdns-38.net, ns-1131.awsdns-13.org and ns-1762.awsdns-28.co.uk.

There is at least partial name server overlap between webclass.jp and other domains — cologuardcrc.com, yumemi.jp, 3zcvg.cloud and two more among them.

All four hostnames — ns-363.awsdns-45.com, ns-823.awsdns-38.net, ns-1131.awsdns-13.org and ns-1762.awsdns-28.co.uk — resolve to two IP numbers apiece: ns-363.awsdns-45.com to 205.251.193.107 and 2600:9000:5301:6b00::1; ns-823.awsdns-38.net to 205.251.195.55 and 2600:9000:5303:3700::1; ns-1131.awsdns-13.org to 205.251.196.107 and 2600:9000:5304:6b00::1; ns-1762.awsdns-28.co.uk to 205.251.198.226 and 2600:9000:5306:e200::1.

Mail Servers

webclass.jp accepts email via 7 mail servers: aspmx2.googlemail.com, aspmx3.googlemail.com, aspmx4.googlemail.com and 4 other.

At least some of the mail servers used by webclass.jp are shared with other domains: ns500671.ns500731.ns500742.ns500742.ns500742.ns500742.ns500742.ns500731.ns500704.ns500704.ns500704.ns500649.ns500291.ns500649.ns500666.lustychickser.com, ns500731.ns500754.ns500671.ns500731.ns500742.ns500705.ns500671.ns500678.ns500671.ns500649.ns500666.ns500653.ns500153.tenderladiesbz.com, ns500754.ns500731.ns500754.ns500754.ns500754.ns500704.ns500731.ns500671.ns500742.ns500649.ns500291.ns500291.ns500291.ns500291.ns500291.ns500131.lustychickser.com and two others among them.

These mail servers are often deployed together with aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com and 3 other mail servers.

Host names pointing to two IP addresses:

aspmx2.googlemail.com points to 108.177.123.27 and 2800:3f0:4003:c0f::1b.

aspmx3.googlemail.com points to 172.253.116.27 and 2a00:1450:400b:c02::1a.

aspmx4.googlemail.com points to 192.178.223.27 and 2a00:1450:4009:c0f::1b.

aspmx5.googlemail.com points to 172.253.157.27 and 2a00:1450:400c:c23::1b.

aspmx.l.google.com points to 142.251.163.26 and 2607:f8b0:4004:c1b::1b.

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

alt2.aspmx.l.google.com points to 172.253.116.27 and 2a00:1450:400b:c02::1b.

aspmx2.googlemail.com and alt1.aspmx.l.google.com are host names that each point to 2800:3f0:4003:c0f::1b IP addresses.

aspmx2.googlemail.com and alt1.aspmx.l.google.com are host names that each point to 108.177.123.27 IP addresses.

aspmx3.googlemail.com and alt2.aspmx.l.google.com are host names that each point to 172.253.116.27 IP addresses.