`classic521.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3032::ac43:d133^{🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3033::6815:1732^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.23.50^{Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.209.51^{🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`barbara.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3af8^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`barbara.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c0f8^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`barbara.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:20f8^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`barbara.ns.cloudflare.com`
		A	108.162.192.248^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`barbara.ns.cloudflare.com`
		A	172.64.32.248^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`barbara.ns.cloudflare.com`
		A	173.245.58.248^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`barbara.ns.cloudflare.com`
NS	`trevor.ns.cloudflare.com`
		A	2606:4700:58::a29f:2c9a^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`trevor.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c39a^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`trevor.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:239a^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`trevor.ns.cloudflare.com`
		A	108.162.195.154^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`trevor.ns.cloudflare.com`
		A	162.159.44.154^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`trevor.ns.cloudflare.com`
		A	172.64.35.154^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`trevor.ns.cloudflare.com`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4	104.21.23.50, 172.67.209.51
		IPv6	2606:4700:3032::ac43:d133, 2606:4700:3033::6815:1732
SOA	`barbara.ns.cloudflare.com`dns@cloudflare.com serial=2397965178

`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=1774438447

Same first word

classic521.com

DNS History

19 records (6 active, 13 former)

●NSbarbara.ns.cloudflare.com2026-03-23 → 2026-03-25 · 3 obs

○ 2020-04-11 18:09:44
● 2026-03-23 18:23:54
● 2026-03-25 11:56:14

○NSdns10.hichina.com2015-10-27 → 2017-02-16 · 5 obs

○ 2015-06-29 15:53:48
● 2015-10-27 21:32:00
● 2017-02-16 12:44:16
○ 2020-04-11 18:09:44
○ 2026-03-25 11:56:14

○NSdns9.hichina.com2015-10-27 → 2017-02-16 · 5 obs

○ 2015-06-29 15:53:48
● 2015-10-27 21:32:00
● 2017-02-16 12:44:16
○ 2020-04-11 18:09:44
○ 2026-03-25 11:56:14

○NSexp1.judns.com2026-03-23 → 2026-03-25 · 2 obs

○ 2026-03-23 18:23:54
○ 2026-03-25 11:56:14

○NSexp2.judns.com2026-03-23 → 2026-03-25 · 2 obs

○ 2026-03-23 18:23:54
○ 2026-03-25 11:56:14

○NSjm1.alidns.com2020-04-11 → 2020-04-11 · 4 obs

○ 2017-02-16 12:44:16
● 2020-04-11 18:09:44
○ 2026-03-23 18:23:54
○ 2026-03-25 11:56:14

○NSjm2.alidns.com2020-04-11 → 2020-04-11 · 4 obs

○ 2017-02-16 12:44:16
● 2020-04-11 18:09:44
○ 2026-03-23 18:23:54
○ 2026-03-25 11:56:14

○NSns1.cnolnic.com2015-06-29 → 2015-06-29 · 3 obs

● 2015-06-29 15:53:48
○ 2015-10-27 21:32:00
○ 2026-03-25 11:56:14

○NSns2.cnolnic.com2015-06-29 → 2015-06-29 · 3 obs

● 2015-06-29 15:53:48
○ 2015-10-27 21:32:00
○ 2026-03-25 11:56:14

●NStrevor.ns.cloudflare.com2026-03-23 → 2026-03-25 · 3 obs

○ 2020-04-11 18:09:44
● 2026-03-23 18:23:54
● 2026-03-25 11:56:14

○MXmxdomain.qq.com2015-10-27 → 2017-02-16 · 4 obs

● 2015-10-27 21:32:00
● 2017-02-16 12:44:16
○ 2020-04-11 18:09:44
○ 2026-03-25 11:56:14

●A104.21.23.502026-03-23 → 2026-03-25 · 3 obs

○ 2020-04-11 18:09:44
● 2026-03-23 18:23:54
● 2026-03-25 11:56:14

○A116.255.200.2072015-06-29 → 2015-06-29 · 3 obs

● 2015-06-29 15:53:48
○ 2015-10-27 21:32:00
○ 2026-03-25 11:56:14

○A121.42.81.2112015-10-27 → 2017-02-16 · 5 obs

○ 2015-06-29 15:53:48
● 2015-10-27 21:32:00
● 2017-02-16 12:44:16
○ 2020-04-11 18:09:44
○ 2026-03-25 11:56:14

●A172.67.209.512026-03-23 → 2026-03-25 · 3 obs

○ 2020-04-11 18:09:44
● 2026-03-23 18:23:54
● 2026-03-25 11:56:14

●A2606:4700:3032::ac43:d1332026-03-23 → 2026-03-25 · 3 obs

○ 2020-04-11 18:09:44
● 2026-03-23 18:23:54
● 2026-03-25 11:56:14

●A2606:4700:3033::6815:17322026-03-23 → 2026-03-25 · 3 obs

○ 2020-04-11 18:09:44
● 2026-03-23 18:23:54
● 2026-03-25 11:56:14

○A45.204.210.1172020-04-11 → 2020-04-11 · 4 obs

○ 2017-02-16 12:44:16
● 2020-04-11 18:09:44
○ 2026-03-23 18:23:54
○ 2026-03-25 11:56:14

○CNAMEexp.judns.com2026-03-23 → 2026-03-25 · 2 obs

○ 2026-03-23 18:23:54
○ 2026-03-25 11:56:14

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	e.gtld-servers.net, l.gtld-servers.net, f.gtld-servers.net, j.gtld-servers.net...	-
classic521.com	barbara.ns.cloudflare.com, trevor.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.192.248

NS records: barbara.ns.cloudflare.com, trevor.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for classic521.com (unsigned zone)

⏱️ Timing

Total: 104ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.23.50, 172.67.209.51`
AAAA	2	`2606:4700:3033::6815:1732, 2606:4700:3032::ac43:d133`
NS	2	`barbara.ns.cloudflare.com, trevor.ns.cloudflare.com`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`barbara.ns.cloudflare.com dns.cloudflare`

📌 Glue Records Collected

Total: 12

Out-of-bailiwick: 12 (barbara.ns.cloudflare.com, barbara.ns.cloudflare.com, barbara.ns.cloudflare.com...)

Analysis

IP Addresses

classic521.com points to four IP numbers: 2606:4700:3032::ac43:d133, 2606:4700:3033::6815:1732, 104.21.23.50 and 172.67.209.51.

Other host names, for instance sweetmeatssandwichbar.com, cpbcopenhagen.dk, block72.io, omahainsure.com and modne-ogrody.pl share IP numbers with classic521.com.

Name Servers

Delegation for classic521.com rests with two name servers, barbara.ns.cloudflare.com and trevor.ns.cloudflare.com.

classic521.com shares the same name server setup as other domains, including hebcm.com, pump168.net, lvye-hb.com, yxhyjz.com and lxdy.net.

classic521.com at least partially shares name servers with other domains, for instance unitedscience.com, zerohourworkdays.com, powen123.com, filtersbestellen.nl and hoojan.com.

these name servers are commonly used with kay.ns.cloudflare.com, linda.ns.cloudflare.com and rodney.ns.cloudflare.com.

Host names with six IP numbers: barbara.ns.cloudflare.com points to: 2606:4700:50::adf5:3af8, 2803:f800:50::6ca2:c0f8, 2a06:98c1:50::ac40:20f8, 108.162.192.248, 172.64.32.248 and 173.245.58.248. trevor.ns.cloudflare.com points to: 2606:4700:58::a29f:2c9a, 2803:f800:50::6ca2:c39a, 2a06:98c1:50::ac40:239a, 108.162.195.154, 162.159.44.154 and 172.64.35.154.

classic521.com - robtex.com

classic521.com

com

Same first word

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

📌 Glue Records Collected

Analysis

IP Addresses

Name Servers

`classic521.com`

`com`