`erdosproblems.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3037::6815:25f7^{🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3037::ac43:d872^{🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.37.247^{Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.216.114^{🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`chip.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b54^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`chip.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c154^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`chip.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2154^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`chip.ns.cloudflare.com`
		A	108.162.193.84^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`chip.ns.cloudflare.com`
		A	172.64.33.84^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`chip.ns.cloudflare.com`
		A	173.245.59.84^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`chip.ns.cloudflare.com`
NS	`chloe.ns.cloudflare.com`
		A	2606:4700:50::adf5:3a55^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`chloe.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c055^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`chloe.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2055^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`chloe.ns.cloudflare.com`
		A	108.162.192.85^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`chloe.ns.cloudflare.com`
		A	172.64.32.85^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`chloe.ns.cloudflare.com`
		A	173.245.58.85^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`chloe.ns.cloudflare.com`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4	104.21.37.247, 172.67.216.114
		IPv6	2606:4700:3037::6815:25f7, 2606:4700:3037::ac43:d872
SOA	`chip.ns.cloudflare.com`dns@cloudflare.com serial=2397725174

`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

rank #439528 globally
rank #197286 in the tld
📈 Tranco rank: #513,431

Subdomains

www.erdosproblems.com

Same first word

erdosproblems.com

DNS History

6 records (6 active, 0 former)

●NSchip.ns.cloudflare.com2026-03-15 → 2026-03-23 · 2 obs

● 2026-03-15 04:14:48
● 2026-03-23 00:55:04

●NSchloe.ns.cloudflare.com2026-03-15 → 2026-03-23 · 2 obs

● 2026-03-15 04:14:48
● 2026-03-23 00:55:04

●A104.21.37.2472026-03-15 → 2026-03-23 · 2 obs

● 2026-03-15 04:14:48
● 2026-03-23 00:55:04

●A172.67.216.1142026-03-15 → 2026-03-23 · 2 obs

● 2026-03-15 04:14:48
● 2026-03-23 00:55:04

●A2606:4700:3037::6815:25f72026-03-15 → 2026-03-23 · 2 obs

● 2026-03-15 04:14:48
● 2026-03-23 00:55:04

●A2606:4700:3037::ac43:d8722026-03-15 → 2026-03-23 · 2 obs

● 2026-03-15 04:14:48
● 2026-03-23 00:55:04

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	m.gtld-servers.net, b.gtld-servers.net, d.gtld-servers.net, f.gtld-servers.net...	-
erdosproblems.com	chloe.ns.cloudflare.com, chip.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.193.84

NS records: chloe.ns.cloudflare.com, chip.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for erdosproblems.com (unsigned zone)

⏱️ Timing

Total: 169ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.37.247, 172.67.216.114`
AAAA	2	`2606:4700:3037::6815:25f7, 2606:4700:3037::ac43:d872`
NS	2	`chip.ns.cloudflare.com, chloe.ns.cloudflare.com`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`chip.ns.cloudflare.com dns.cloudflare.co`

📌 Glue Records Collected

Total: 12

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

Analysis

Hierarchy

www.erdosproblems.com has erdosproblems.com as its parent.

IP Addresses

erdosproblems.com maps to four IP numbers: 2606:4700:3037::6815:25f7, 2606:4700:3037::ac43:d872, 104.21.37.247 and 172.67.216.114.

Other host names, for instance payments.com.au, crescerfeliz.com, eroteo.pl, varanne.com and fedsmi.com share IP numbers with erdosproblems.com.

Name Servers

Two name servers chip.ns.cloudflare.com and chloe.ns.cloudflare.com are delegated to erdosproblems.com.

erdosproblems.com uses the same name server configuration as other domains, such as sitewebcraft.com, paxe.at, andeandinos.com, micronjo.com and gamerstube.eu.

erdosproblems.com at least partially shares name servers with other domains such as medworx.co.uk, sj663.com, centralwisconsinnews.com, aiviotech.com and yeyelu888.com.

These name servers are commonly used alongside nelly.ns.cloudflare.com, liberty.ns.cloudflare.com and rex.ns.cloudflare.com.

Host names with six IP numbers: Host name chip.ns.cloudflare.com points to 2606:4700:58::adf5:3b54, 2803:f800:50::6ca2:c154, 2a06:98c1:50::ac40:2154, 108.162.193.84, 172.64.33.84 and 173.245.59.84; host name chloe.ns.cloudflare.com points to 2606:4700:50::adf5:3a55, 2803:f800:50::6ca2:c055, 2a06:98c1:50::ac40:2055, 108.162.192.85, 172.64.32.85 and 173.245.58.85.

erdosproblems.com - robtex.com