`classmateline.com`

DNSSEC	⚠️ Not signed
A	52.193.121.155^{🇯🇵 Amazon52.192.0.0/15 EC2 NRT prefix}
		PTR	`ec2-52-193-121-155.ap-northeast-1.compute.amazonaws.com`
NS	`ns11.value-domain.com` ⭐ ⚠️ Not in parent delegation
		A	172.64.52.98^{🇺🇸 Cloudflare172.64.52.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
		A	172.64.52.184^{🇺🇸 Cloudflare172.64.52.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
NS	`ns1.value-domain.com` ⚠️ Not in zone NS records
		A	172.64.52.38^{🇺🇸 Cloudflare172.64.52.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ip-172-64-52-38.defastlink.net`
		A	172.64.52.161^{🇺🇸 Cloudflare172.64.52.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ip-172-64-52-161.defastlink.net`
NS	`ns12.value-domain.com` ⚠️ Not in zone NS records
		A	172.64.53.86^{🇺🇸 Cloudflare172.64.53.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
		A	172.64.53.188^{🇺🇸 Cloudflare172.64.53.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
NS	`ns13.value-domain.com` ⚠️ Not in zone NS records
		A	172.64.52.98^{🇺🇸 Cloudflare172.64.52.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
		A	172.64.52.184^{🇺🇸 Cloudflare172.64.52.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
NS	`ns2.value-domain.com` ⚠️ Not in parent delegation
		A	172.64.53.3^{🇺🇸 Cloudflare172.64.53.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ip-172-64-53-3.defastlink.net`
		A	172.64.53.115^{🇺🇸 Cloudflare172.64.53.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ip-172-64-53-115.defastlink.net`
MX	`mail.classmateline.com` ⭐
		A	160.251.151.207^{🇯🇵 GMOOSK-NET160.251.151.0/24 GMO Internet,Inc Cerulean Tower, 11F Sakuragaokacho-26-1 Shibuya-ku, Tokyo 150-8512, Japan}
			PTR	`s501.xrea.com`
TXT	`v=spf1 a:mail.classmateline.com include:spf.bserver.jp ~all`
SOA	`ns1.value-domain.com`hostmaster@classmateline.com 2020-08-26 #23

`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

Subdomains

mail.classmateline.com

Same first word

classmateline.com

Similar names

stellacinemas.ie

DNS History

7 records (7 active, 0 former)

●NSns1.value-domain.com2026-02-22 → 2026-02-28 · 3 obs

○ 2019-12-17 21:20:52
● 2026-02-22 18:01:02
● 2026-02-28 16:37:48

●NSns11.value-domain.com2019-12-17 → 2026-02-28 · 2 obs

● 2019-12-17 21:20:52
● 2026-02-28 16:37:48

●NSns12.value-domain.com2019-12-17 → 2026-02-28 · 2 obs

● 2019-12-17 21:20:52
● 2026-02-28 16:37:48

●NSns13.value-domain.com2019-12-17 → 2026-02-28 · 2 obs

● 2019-12-17 21:20:52
● 2026-02-28 16:37:48

●NSns2.value-domain.com2026-02-22 → 2026-02-28 · 3 obs

○ 2019-12-17 21:20:52
● 2026-02-22 18:01:02
● 2026-02-28 16:37:48

●MXmail.classmateline.com2019-12-17 → 2026-02-28 · 2 obs

● 2019-12-17 21:20:52
● 2026-02-28 16:37:48

●A52.193.121.1552019-12-17 → 2026-02-28 · 2 obs

● 2019-12-17 21:20:52
● 2026-02-28 16:37:48

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
classmateline.com	ns11.value-domain.com, ns12.value-domain.com, ns13.value-domain.com	3 records

✅ Authoritative Response

Server: 172.64.52.184

NS records: ns11.value-domain.com, ns12.value-domain.com, ns13.value-domain.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for classmateline.com (unsigned zone)

⏱️ Timing

Total: 481ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`52.193.121.155`
NS	2	`ns1.value-domain.com, ns2.value-domain.com`
MX	1	`mail.classmateline.com (pri: 10)`
TXT	1	`v=spf1 a:mail.classmateline.com include:`
SOA	1	`ns1.value-domain.com hostmaster.classmat`

📌 Glue Records Collected

Total: 3

Out-of-bailiwick: 3 (ns11.value-domain.com, ns12.value-domain.com, ns13.value-domain.com)

Analysis

Hierarchy

mail.classmateline.com has classmateline.com as its parent.

IP Addresses

classmateline.com maps to IP address 52.193.121.155.

Other host names, for instance mail.i-classmate.jp, i-classmate.jp, www.k-homeroom.jp, ec2-52-193-121-155.ap-northeast-1.compute.amazonaws.com and www.a-cloud.co.jp share IP numbers with classmateline.com.

Name Servers

classmateline.com delegates to five name servers: ns11.value-domain.com, ns12.value-domain.com, ns13.value-domain.com, ns1.value-domain.com and ns2.value-domain.com.

classmateline.com at least partially shares name servers with other domains such as world-class-domain.com, tackey.jp, 15net.jp, setsu.org and tsumuri.net.