`mathnetbase.cn`

DNSSEC	⚠️ Not signed
A	2606:4700:3030::ac43:d00e^{🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3035::6815:351c^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.53.28^{Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.208.14^{🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`bart.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b47^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`bart.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c147^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`bart.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2147^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`bart.ns.cloudflare.com`
		A	108.162.193.71^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`bart.ns.cloudflare.com`
		A	172.64.33.71^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`bart.ns.cloudflare.com`
		A	173.245.59.71^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`bart.ns.cloudflare.com`
NS	`hera.ns.cloudflare.com`
		A	2606:4700:50::adf5:3aa2^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`hera.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c0a2^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`hera.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:20a2^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`hera.ns.cloudflare.com`
		A	108.162.192.162^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`hera.ns.cloudflare.com`
		A	172.64.32.162^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`hera.ns.cloudflare.com`
		A	173.245.58.162^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`hera.ns.cloudflare.com`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.53.28, 172.67.208.14
		IPv6 hints	2606:4700:3030::ac43:d00e, 2606:4700:3035::6815:351c
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=128, name=cloudflare-ech.com
SOA	`bart.ns.cloudflare.com`dns@cloudflare.com serial=2410497535

`cn`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.dns.cn` ⭐
	NS	`b.dns.cn`
	NS	`c.dns.cn`
	NS	`d.dns.cn`
	NS	`e.dns.cn`
	NS	`ns.cernet.net` ⚠️ Not in parent delegation
	SOA	`a.dns.cn`root@cnnic.cn 2035-09-31 #78

Same first word

mathnetbase.cn

Similar names

basetenmath.com

DNS History

11 records (6 active, 5 former)

●NSbart.ns.cloudflare.com2026-07-13 → 2026-07-26 · 3 obs

○ 2020-02-28 19:40:36
● 2026-07-13 11:11:16
● 2026-07-26 14:27:32

○NSdns1.idp365.net2015-06-30 → 2020-02-28 · 4 obs

● 2015-06-30 20:19:46
● 2020-02-28 19:40:36
○ 2026-07-13 11:11:16
○ 2026-07-26 14:27:32

○NSdns2.idp365.net2015-06-30 → 2020-02-28 · 4 obs

● 2015-06-30 20:19:46
● 2020-02-28 19:40:36
○ 2026-07-13 11:11:16
○ 2026-07-26 14:27:32

○NSdns3.idp365.net2015-06-30 → 2020-02-28 · 4 obs

● 2015-06-30 20:19:46
● 2020-02-28 19:40:36
○ 2026-07-13 11:11:16
○ 2026-07-26 14:27:32

●NShera.ns.cloudflare.com2026-07-13 → 2026-07-26 · 3 obs

○ 2020-02-28 19:40:36
● 2026-07-13 11:11:16
● 2026-07-26 14:27:32

●A104.21.53.282026-07-13 → 2026-07-26 · 5 obs

○ 2020-02-28 19:40:36
● 2026-07-13 11:11:16
○ 2026-07-24 03:45:32
● 2026-07-25 23:24:48
● 2026-07-26 14:27:32

●A172.67.208.142026-07-13 → 2026-07-26 · 5 obs

○ 2020-02-28 19:40:36
● 2026-07-13 11:11:16
○ 2026-07-24 03:45:32
● 2026-07-25 23:24:48
● 2026-07-26 14:27:32

○A208.254.74.772015-06-30 → 2015-11-11 · 4 obs

● 2015-06-30 20:19:46
● 2015-11-11 04:40:06
○ 2016-03-14 19:36:40
○ 2026-07-26 14:27:32

○A217.19.248.1322016-03-14 → 2020-02-28 · 5 obs

○ 2015-11-11 04:40:06
● 2016-03-14 19:36:40
● 2020-02-28 19:40:36
○ 2026-07-13 11:11:16
○ 2026-07-26 14:27:32

●A2606:4700:3030::ac43:d00e2026-07-13 → 2026-07-26 · 5 obs

○ 2020-02-28 19:40:36
● 2026-07-13 11:11:16
○ 2026-07-24 03:45:32
● 2026-07-25 23:24:48
● 2026-07-26 14:27:32

●A2606:4700:3035::6815:351c2026-07-13 → 2026-07-26 · 5 obs

○ 2020-02-28 19:40:36
● 2026-07-13 11:11:16
○ 2026-07-24 03:45:32
● 2026-07-25 23:24:48
● 2026-07-26 14:27:32

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cn	a.dns.cn, b.dns.cn, c.dns.cn, d.dns.cn...	-
mathnetbase.cn	bart.ns.cloudflare.com, hera.ns.cloudflare.com	-

✅ Authoritative Response

Server:172.64.32.162

NS records: bart.ns.cloudflare.com, hera.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for mathnetbase.cn (unsigned zone)

⏱️ Timing

Total: 3129ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.53.28, 172.67.208.14`
AAAA	2	`2606:4700:3030::ac43:d00e, 2606:4700:3035::6815:351c`
NS	2	`bart.ns.cloudflare.com, hera.ns.cloudflare.com`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`bart.ns.cloudflare.com dns.cloudflare.co`

Analysis

IP Addresses

mathnetbase.cn resolves to four IP addresses: 104.21.53.28, 172.67.208.14, 2606:4700:3030::ac43:d00e and 2606:4700:3035::6815:351c.

Among the host names that share IP numbers with mathnetbase.cn are provesmm.xyz, mainiotech.com, www.hiscornerstone.com and two others.

Name Servers

mathnetbase.cn uses two name servers for its delegation: bart.ns.cloudflare.com and hera.ns.cloudflare.com.

mathnetbase.cn has the same name server delegation as a number of other domains, such as routledgeeducationonline.com, costpergigabyte.com, ceohalloffame.com and two more.

mathnetbase.cn partially shares its NS delegation with several other domains, including blueheronyarns.com, summitluckyhub.com, flavus.com and two others.

These name servers are regularly seen alongside maria.ns.cloudflare.com and dax.ns.cloudflare.com as name servers.

Host names resolving to 6 IP numbers:

Hostname bart.ns.cloudflare.com directs to 108.162.193.71, 172.64.33.71 and 173.245.59.71 along with 3 other IP addresses.

Hostname hera.ns.cloudflare.com directs to 108.162.192.162, 172.64.32.162 and 173.245.58.162 along with 3 other IP addresses.

mathnetbase.cn - robtex.com

mathnetbase.cn

cn

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

IP Addresses

Name Servers

`mathnetbase.cn`

`cn`