classca.jp - dns.ninja

`classca.jp`

DNSSEC	⚠️ Not signed
A	2600:9000:2943:1000:3:fe43:3100:93a1^{🇺🇸 Amazon2600:9000:2943::/48}
A	2600:9000:2943:2c00:3:fe43:3100:93a1^{🇺🇸 Amazon2600:9000:2943::/48}
A	2600:9000:2943:4800:3:fe43:3100:93a1^{🇺🇸 Amazon2600:9000:2943::/48}
A	2600:9000:2943:4e00:3:fe43:3100:93a1^{🇺🇸 Amazon2600:9000:2943::/48}
A	2600:9000:2943:6800:3:fe43:3100:93a1^{🇺🇸 Amazon2600:9000:2943::/48}
A	2600:9000:2943:7200:3:fe43:3100:93a1^{🇺🇸 Amazon2600:9000:2943::/48}
A	2600:9000:2943:7a00:3:fe43:3100:93a1^{🇺🇸 Amazon2600:9000:2943::/48}
A	2600:9000:2943:b400:3:fe43:3100:93a1^{🇺🇸 Amazon2600:9000:2943::/48}
A	157.7.189.228^{🇯🇵 GMO-INTERNET157.7.128.0/17 GMO Internet,Inc Cerulean Tower, 11F Sakuragaokacho-26-1 Shibuya-ku, Tokyo 150-8512, Japan}
NS	`classca.jp` ⭐
		A	2600:9000:2943:1000:3:fe43:3100:93a1^{🇺🇸 Amazon2600:9000:2943::/48}
		A	2600:9000:2943:2c00:3:fe43:3100:93a1^{🇺🇸 Amazon2600:9000:2943::/48}
		A	2600:9000:2943:4800:3:fe43:3100:93a1^{🇺🇸 Amazon2600:9000:2943::/48}
		A	2600:9000:2943:4e00:3:fe43:3100:93a1^{🇺🇸 Amazon2600:9000:2943::/48}
		A	2600:9000:2943:6800:3:fe43:3100:93a1^{🇺🇸 Amazon2600:9000:2943::/48}
		A	2600:9000:2943:7200:3:fe43:3100:93a1^{🇺🇸 Amazon2600:9000:2943::/48}
		A	2600:9000:2943:7a00:3:fe43:3100:93a1^{🇺🇸 Amazon2600:9000:2943::/48}
		A	2600:9000:2943:b400:3:fe43:3100:93a1^{🇺🇸 Amazon2600:9000:2943::/48}
		A	157.7.189.228^{🇯🇵 GMO-INTERNET157.7.128.0/17 GMO Internet,Inc Cerulean Tower, 11F Sakuragaokacho-26-1 Shibuya-ku, Tokyo 150-8512, Japan}
			PTR	`users220.vip.heteml.jp`
NS	`dns01.muumuu-domain.com`
		A	202.239.23.39^{🇯🇵 IDC202.239.23.0/24 Frontier Inc.}
NS	`dns02.muumuu-domain.com`
		A	160.251.249.62^{🇯🇵 GMOOSK-NET160.251.128.0/17 GMO Internet,Inc Cerulean Tower, 11F Sakuragaokacho-26-1 Shibuya-ku, Tokyo 150-8512, Japan}
MX	`aspmx.l.google.com` ⭐
		A	2607:f8b0:4004:c25::1a^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`yuiadtq-in-f26.1e100.net`
		A	142.250.31.26^{🇺🇸 Google142.250.31.0/24}
			PTR	`bj-in-f26.1e100.net`
MX	`alt1.aspmx.l.google.com`⁽²⁰⁾
		A	2800:3f0:4003:c0f::1b^{🇨🇱 Google2800:3f0:4003::/48}
		A	108.177.123.26^{🇺🇸 Google108.177.123.0/24}
			PTR	`lcscld-in-f26.1e100.net`
MX	`alt2.aspmx.l.google.com`⁽²⁰⁾
		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	`aspmx2.googlemail.com`⁽³⁰⁾
		A	2800:3f0:4003:c0f::1a^{🇨🇱 Google2800:3f0:4003::/48}
		A	108.177.123.26^{🇺🇸 Google108.177.123.0/24}
			PTR	`lcscld-in-f26.1e100.net`
MX	`aspmx3.googlemail.com`⁽³⁰⁾
		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	`aspmx4.googlemail.com`⁽³⁰⁾
		A	2a00:1450:4009:c0f::1a^{🇬🇧 Google2a00:1450:4009::/48}
			PTR	`yulhrs-in-f26.1e100.net`
		A	192.178.223.26^{🇺🇸 Google192.178.223.0/24}
			PTR	`yulhrs-in-f26.1e100.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`
MX	`mail21.heteml.jp`⁽⁵⁰⁾
		A	157.7.189.15^{🇯🇵 GMO-INTERNET157.7.128.0/17 GMO Internet,Inc Cerulean Tower, 11F Sakuragaokacho-26-1 Shibuya-ku, Tokyo 150-8512, Japan}
			PTR	`mail-proxy.heteml.jp`
TXT	`v=spf1 include:_spf.google.com include:heteml.jp ~all`
TXT	`google-site-verification=o-LqAy269orPHcy1L8BeIstRq-sDdm6PIbyrxb0PQXQ`
SOA	`classca.jp`postmaster@classca.jp serial=1780314765

`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=1784980803

NS for

classca.jp

Subdomains

www.classca.jp

Same first word

classca.jp

Similar names

sclcasa.com

aascslc.com

lasscac.cn

caclass.com

DNS History

45 records (20 active, 25 former)

●NSclassca.jp2018-05-13 → 2026-07-25 · 2 obs

● 2018-05-13 14:43:42
● 2026-07-25 12:47:14

●NSdns01.muumuu-domain.com2018-05-13 → 2026-07-25 · 2 obs

● 2018-05-13 14:43:42
● 2026-07-25 12:47:14

●NSdns02.muumuu-domain.com2018-05-13 → 2026-07-25 · 2 obs

● 2018-05-13 14:43:42
● 2026-07-25 12:47:14

●MXalt1.aspmx.l.google.com2018-05-13 → 2026-07-25 · 2 obs

● 2018-05-13 14:43:42
● 2026-07-25 12:47:14

●MXalt2.aspmx.l.google.com2018-05-13 → 2026-07-25 · 2 obs

● 2018-05-13 14:43:42
● 2026-07-25 12:47:14

●MXaspmx.l.google.com2018-05-13 → 2026-07-25 · 2 obs

● 2018-05-13 14:43:42
● 2026-07-25 12:47:14

●MXaspmx2.googlemail.com2018-05-13 → 2026-07-25 · 2 obs

● 2018-05-13 14:43:42
● 2026-07-25 12:47:14

●MXaspmx3.googlemail.com2018-05-13 → 2026-07-25 · 2 obs

● 2018-05-13 14:43:42
● 2026-07-25 12:47:14

●MXaspmx4.googlemail.com2018-05-13 → 2026-07-25 · 2 obs

● 2018-05-13 14:43:42
● 2026-07-25 12:47:14

●MXaspmx5.googlemail.com2018-05-13 → 2026-07-25 · 2 obs

● 2018-05-13 14:43:42
● 2026-07-25 12:47:14

●MXmail21.heteml.jp2018-05-13 → 2026-07-25 · 2 obs

● 2018-05-13 14:43:42
● 2026-07-25 12:47:14

●A157.7.189.2282026-06-15 → 2026-07-25 · 3 obs

○ 2018-05-13 14:43:42
● 2026-06-15 07:10:04
● 2026-07-25 12:47:14

○A157.7.44.372018-05-13 → 2018-05-13 · 3 obs

● 2018-05-13 14:43:42
○ 2026-06-15 07:10:04
○ 2026-07-25 12:47:14

○A2600:9000:2112:0:3:fe43:3100:93a12026-06-15 → 2026-07-25 · 2 obs

○ 2026-06-15 07:10:04
○ 2026-07-25 12:47:14

○A2600:9000:2112:2000:3:fe43:3100:93a12026-06-15 → 2026-06-15 · 4 obs

○ 2018-05-13 14:43:42
● 2026-06-15 07:10:04
○ 2026-07-18 05:41:06
○ 2026-07-25 12:47:14

○A2600:9000:2112:2600:3:fe43:3100:93a12026-06-15 → 2026-06-15 · 4 obs

○ 2018-05-13 14:43:42
● 2026-06-15 07:10:04
○ 2026-07-18 05:41:06
○ 2026-07-25 12:47:14

○A2600:9000:2112:2800:3:fe43:3100:93a12026-06-15 → 2026-06-15 · 4 obs

○ 2018-05-13 14:43:42
● 2026-06-15 07:10:04
○ 2026-07-18 05:41:06
○ 2026-07-25 12:47:14

○A2600:9000:2112:3200:3:fe43:3100:93a12026-06-15 → 2026-06-15 · 4 obs

○ 2018-05-13 14:43:42
● 2026-06-15 07:10:04
○ 2026-07-18 05:41:06
○ 2026-07-25 12:47:14

○A2600:9000:2112:3400:3:fe43:3100:93a12026-06-15 → 2026-06-15 · 4 obs

○ 2018-05-13 14:43:42
● 2026-06-15 07:10:04
○ 2026-07-18 05:41:06
○ 2026-07-25 12:47:14

○A2600:9000:2112:5e00:3:fe43:3100:93a12026-06-15 → 2026-07-25 · 2 obs

○ 2026-06-15 07:10:04
○ 2026-07-25 12:47:14

○A2600:9000:2112:800:3:fe43:3100:93a12026-06-15 → 2026-07-25 · 2 obs

○ 2026-06-15 07:10:04
○ 2026-07-25 12:47:14

○A2600:9000:2112:8600:3:fe43:3100:93a12026-06-15 → 2026-07-25 · 2 obs

○ 2026-06-15 07:10:04
○ 2026-07-25 12:47:14

○A2600:9000:2112:9800:3:fe43:3100:93a12026-06-15 → 2026-06-15 · 4 obs

○ 2018-05-13 14:43:42
● 2026-06-15 07:10:04
○ 2026-07-18 05:41:06
○ 2026-07-25 12:47:14

○A2600:9000:2112:a600:3:fe43:3100:93a12026-06-15 → 2026-06-15 · 4 obs

○ 2018-05-13 14:43:42
● 2026-06-15 07:10:04
○ 2026-07-18 05:41:06
○ 2026-07-25 12:47:14

○A2600:9000:2112:c400:3:fe43:3100:93a12026-06-15 → 2026-07-25 · 2 obs

○ 2026-06-15 07:10:04
○ 2026-07-25 12:47:14

○A2600:9000:2112:da00:3:fe43:3100:93a12026-06-15 → 2026-07-25 · 2 obs

○ 2026-06-15 07:10:04
○ 2026-07-25 12:47:14

○A2600:9000:2112:e400:3:fe43:3100:93a12026-06-15 → 2026-06-15 · 4 obs

○ 2018-05-13 14:43:42
● 2026-06-15 07:10:04
○ 2026-07-18 05:41:06
○ 2026-07-25 12:47:14

○A2600:9000:2112:f400:3:fe43:3100:93a12026-06-15 → 2026-07-25 · 2 obs

○ 2026-06-15 07:10:04
○ 2026-07-25 12:47:14

○A2600:9000:2112:f800:3:fe43:3100:93a12026-06-15 → 2026-07-25 · 2 obs

○ 2026-06-15 07:10:04
○ 2026-07-25 12:47:14

●A2600:9000:2943:1000:3:fe43:3100:93a12026-07-25 → 2026-07-25 · 2 obs

○ 2026-07-18 05:41:06
● 2026-07-25 12:47:14

●A2600:9000:2943:2c00:3:fe43:3100:93a12026-07-25 → 2026-07-25 · 2 obs

○ 2026-07-18 05:41:06
● 2026-07-25 12:47:14

○A2600:9000:2943:3000:3:fe43:3100:93a12026-07-18 → 2026-07-18 · 3 obs

○ 2026-06-15 07:10:04
● 2026-07-18 05:41:06
○ 2026-07-25 12:47:14

●A2600:9000:2943:4800:3:fe43:3100:93a12026-07-25 → 2026-07-25 · 2 obs

○ 2026-07-18 05:41:06
● 2026-07-25 12:47:14

●A2600:9000:2943:4e00:3:fe43:3100:93a12026-07-25 → 2026-07-25 · 2 obs

○ 2026-07-18 05:41:06
● 2026-07-25 12:47:14

○A2600:9000:2943:5e00:3:fe43:3100:93a12026-07-18 → 2026-07-18 · 3 obs

○ 2026-06-15 07:10:04
● 2026-07-18 05:41:06
○ 2026-07-25 12:47:14

●A2600:9000:2943:6800:3:fe43:3100:93a12026-07-25 → 2026-07-25 · 2 obs

○ 2026-07-18 05:41:06
● 2026-07-25 12:47:14

●A2600:9000:2943:7200:3:fe43:3100:93a12026-07-25 → 2026-07-25 · 2 obs

○ 2026-07-18 05:41:06
● 2026-07-25 12:47:14

●A2600:9000:2943:7a00:3:fe43:3100:93a12026-07-25 → 2026-07-25 · 2 obs

○ 2026-07-18 05:41:06
● 2026-07-25 12:47:14

○A2600:9000:2943:a00:3:fe43:3100:93a12026-07-18 → 2026-07-18 · 3 obs

○ 2026-06-15 07:10:04
● 2026-07-18 05:41:06
○ 2026-07-25 12:47:14

●A2600:9000:2943:b400:3:fe43:3100:93a12026-07-25 → 2026-07-25 · 2 obs

○ 2026-07-18 05:41:06
● 2026-07-25 12:47:14

○A2600:9000:2943:d600:3:fe43:3100:93a12026-07-18 → 2026-07-18 · 3 obs

○ 2026-06-15 07:10:04
● 2026-07-18 05:41:06
○ 2026-07-25 12:47:14

○A2600:9000:2943:d800:3:fe43:3100:93a12026-07-18 → 2026-07-18 · 3 obs

○ 2026-06-15 07:10:04
● 2026-07-18 05:41:06
○ 2026-07-25 12:47:14

○A2600:9000:2943:de00:3:fe43:3100:93a12026-07-18 → 2026-07-18 · 3 obs

○ 2026-06-15 07:10:04
● 2026-07-18 05:41:06
○ 2026-07-25 12:47:14

○A2600:9000:2943:e00:3:fe43:3100:93a12026-07-18 → 2026-07-18 · 3 obs

○ 2026-06-15 07:10:04
● 2026-07-18 05:41:06
○ 2026-07-25 12:47:14

○A2600:9000:2943:ee00:3:fe43:3100:93a12026-07-18 → 2026-07-18 · 3 obs

○ 2026-06-15 07:10:04
● 2026-07-18 05:41:06
○ 2026-07-25 12:47:14

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
jp	a.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp...	-
classca.jp	dns01.muumuu-domain.com, dns02.muumuu-domain.com	-

✅ Authoritative Response

Server:160.251.249.62

NS records: dns01.muumuu-domain.com, dns02.muumuu-domain.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for classca.jp (unsigned zone)

⏱️ Timing

Total: 1522ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`157.7.189.228`
AAAA	8	`2600:9000:2112:3a00:3:fe43:3100:93a1, 2600:9000:2112:1200:3:fe43:3100:93a1...`
NS	2	`dns01.muumuu-domain.com, dns02.muumuu-domain.com`
MX	8	`ALT2.ASPMX.L.GOOGLE.COM (pri: 20), ASPMX4.GOOGLEMAIL.COM (pri: 30)...`
TXT	2	`google-site-verification=o-LqAy269orPHcy, v=spf1 include:_spf.google.com include:h`
SOA	1	`classca.jp postmaster.classca.jp`

Analysis

Hierarchy

classca.jp is the parent zone for www.classca.jp.

Name Server Role

The NS records for classca.jp point back to classca.jp itself.

dns01.muumuu-domain.com, dns02.muumuu-domain.com and classca.jp regularly act as name servers together.

IP Addresses

classca.jp directs to 9 IP numbers: 157.7.189.228, 2600:9000:2943:1000:3:fe43:3100:93a1, 2600:9000:2943:2c00:3:fe43:3100:93a1 and 6 other.

Two other host names, along with coreyleedraws.com, mail.t-mind.net and seishin-m.ed.jp, also share IP numbers with classca.jp.

Name Servers

The DNS delegation for classca.jp uses three name servers — classca.jp, dns01.muumuu-domain.com and dns02.muumuu-domain.com.

classca.jp partially shares its NS delegation with several other domains, including garden(0x787878).com, freed-desk.jp, u-tokinoirodori.com and two others.

DNS names with 9 IP addresses:

classca.jp points to 157.7.189.228, 2600:9000:2943:1000:3:fe43:3100:93a1, 2600:9000:2943:2c00:3:fe43:3100:93a1 and 6 other IP addresses.

Host names that point to one IP address:

dns01.muumuu-domain.com resolves to 202.239.23.39.

dns02.muumuu-domain.com resolves to 160.251.249.62.

Mail Servers

The MX records for classca.jp point to 8 mail servers — aspmx2.googlemail.com, aspmx3.googlemail.com, aspmx4.googlemail.com and 5 other.

There is at least a partial MX overlap between classca.jp and other domains, including skann.no, ns500693.ns500765.ns500699.ns500734.ns500693.ns500734.ns500734.ns500693.ns500588.ns500693.ns500588.ns500699.ns500699.ns500699.ns500588.ns500632.ns500110.dtrkdll.com, ns500758.ns500759.ns500698.ns500759.ns500735.ns500735.ns500576.ns500576.ns500686.ns500576.ns500576.ns500652.tracksymphony.com and two others.

These mail servers tend to appear in combination with mail servers aspmx.l.google.com, alt2.aspmx.l.google.com, alt1.aspmx.l.google.com and 4 others.

Host names that have two IP addresses:

aspmx2.googlemail.com resolves to 108.177.123.26 and 2800:3f0:4003:c0f::1a.

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

aspmx4.googlemail.com resolves to 192.178.223.26 and 2a00:1450:4009:c0f::1a.

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

aspmx.l.google.com resolves to 142.250.31.26 and 2607:f8b0:4004:c25::1a.

alt1.aspmx.l.google.com resolves to 108.177.123.26 and 2800:3f0:4003:c0f::1b.

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

Host names that point to one IP address:

mail21.heteml.jp resolves to 157.7.189.15.

The host names aspmx2.googlemail.com and alt1.aspmx.l.google.com both resolve to 108.177.123.26 IP addresses.

The host names aspmx3.googlemail.com and alt2.aspmx.l.google.com both resolve to 172.253.116.27 IP addresses.