www.erdosproblems.com - robtex.com

www.erdosproblems.com

DNSSEC⚠️ Not signed
A2606:4700:3037::6815:25f7🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::ac43:d872🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.37.247Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.216.114🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4104.21.37.247, 172.67.216.114
IPv62606:4700:3037::6815:25f7, 2606:4700:3037::ac43:d872

erdosproblems.com

DNSSEC⚠️ Not signed
A2606:4700:3037::6815:25f7🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::ac43:d872🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.37.247Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.216.114🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSchip.ns.cloudflare.com ⭐
NSchloe.ns.cloudflare.com
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4104.21.37.247, 172.67.216.114
IPv62606:4700:3037::6815:25f7, 2606:4700:3037::ac43:d872
SOAchip.ns.cloudflare.comdns@cloudflare.com serial=2397725174
rank #439528 globally
rank #197286 in the tld
📈 Tranco rank: #513,431

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DNS History

4 records (4 active, 0 former)

A104.21.37.247172.67.216.1142606:4700:3037::6815:25f72606:4700:3037::ac43:d872
●A104.21.37.2472026-03-02 → 2026-03-23 · 2 obs
● 2026-03-02 09:09:08
● 2026-03-23 05:12:46
●A172.67.216.1142026-03-02 → 2026-03-23 · 2 obs
● 2026-03-02 09:09:08
● 2026-03-23 05:12:46
●A2606:4700:3037::6815:25f72026-03-02 → 2026-03-23 · 2 obs
● 2026-03-02 09:09:08
● 2026-03-23 05:12:46
●A2606:4700:3037::ac43:d8722026-03-02 → 2026-03-23 · 2 obs
● 2026-03-02 09:09:08
● 2026-03-23 05:12:46

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coma.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...-
erdosproblems.comchloe.ns.cloudflare.com, chip.ns.cloudflare.com12 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: 715ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.37.247, 172.67.216.114
AAAA22606:4700:3037::6815:25f7, 2606:4700:3037::ac43:d872
HTTPS1{"priority":1,"target":".","alpn":["h3",

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

www.erdosproblems.com points 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 lumon.co.il, internationalpropertyrightsindex.org, vkorzinu.com.ua, desiside99.com and www.depro.com share IP numbers with www.erdosproblems.com.