`distributiontheory.cfd`

DNSSEC	⚠️ Not signed
A	104.21.3.54^{Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.130.68^{🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`brad.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b69^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`brad.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c169^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`brad.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2169^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`brad.ns.cloudflare.com`
		A	108.162.193.105^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`brad.ns.cloudflare.com`
		A	172.64.33.105^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`brad.ns.cloudflare.com`
		A	173.245.59.105^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`brad.ns.cloudflare.com`
NS	`emma.ns.cloudflare.com`
		A	2606:4700:50::adf5:3a70^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`emma.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c070^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`emma.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2070^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`emma.ns.cloudflare.com`
		A	108.162.192.112^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`emma.ns.cloudflare.com`
		A	172.64.32.112^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`emma.ns.cloudflare.com`
		A	173.245.58.112^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`emma.ns.cloudflare.com`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.3.54, 172.67.130.68
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=194, name=cloudflare-ech.com
SOA	`brad.ns.cloudflare.com`dns@cloudflare.com serial=2401729027

`cfd`

	DNSSEC	🔒 Signed (DS record present)
	NS	`ns0.centralnic.net` ⭐
	NS	`a.nic.cfd`
	NS	`b.nic.cfd`
	NS	`c.nic.cfd`
	NS	`d.nic.cfd`
	SOA	`ns0.centralnic.net`hostmaster@centralnic.net serial=1778336242

⚠️ On DNS blocklist: tif

Same first word

distributiontheory.cfd

DNS History

6 records (4 active, 2 former)

●NSbrad.ns.cloudflare.com2026-04-18 → 2026-05-09 · 2 obs

● 2026-04-18 22:47:44
● 2026-05-09 14:34:56

●NSemma.ns.cloudflare.com2026-04-18 → 2026-05-09 · 2 obs

● 2026-04-18 22:47:44
● 2026-05-09 14:34:56

●A104.21.3.542026-04-18 → 2026-05-09 · 4 obs

● 2026-04-18 22:47:44
○ 2026-04-21 18:22:48
● 2026-04-29 18:12:42
● 2026-05-09 14:34:56

●A172.67.130.682026-04-18 → 2026-05-09 · 4 obs

● 2026-04-18 22:47:44
○ 2026-04-21 18:22:48
● 2026-04-29 18:12:42
● 2026-05-09 14:34:56

○A188.114.96.02026-04-21 → 2026-04-21 · 4 obs

○ 2026-04-18 22:47:44
● 2026-04-21 18:22:48
○ 2026-04-29 18:12:42
○ 2026-05-09 14:34:56

○A188.114.97.02026-04-21 → 2026-04-21 · 4 obs

○ 2026-04-18 22:47:44
● 2026-04-21 18:22:48
○ 2026-04-29 18:12:42
○ 2026-05-09 14:34:56

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cfd	a.nic.cfd, b.nic.cfd, c.nic.cfd, d.nic.cfd	8 records
distributiontheory.cfd	brad.ns.cloudflare.com, emma.ns.cloudflare.com	-

✅ Authoritative Response

Server:172.64.33.105

NS records: brad.ns.cloudflare.com, emma.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for distributiontheory.cfd (unsigned zone)

⏱️ Timing

Total: 434ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.130.68, 104.21.3.54`
NS	2	`brad.ns.cloudflare.com, emma.ns.cloudflare.com`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`brad.ns.cloudflare.com dns.cloudflare.co`

📌 Glue Records Collected

Total: 8

In-bailiwick: 8 (a.nic.cfd, b.nic.cfd, c.nic.cfd...)

Analysis

IP Addresses

The entity distributiontheory.cfd points to two IP numbers: 104.21.3.54 and 172.67.130.68.

For instance, other host names c98070648a7d.c98070648a7d.c98070648a7d.c98070648a7d.c98070648a7d.c98070648a7d.c98070648a7d.c98070648a7d.c98070648a7d.hostmaster.shinethrough.com, nextarconsulting.com.cdn.cloudflare.net, ntrwa.org, sulunggrid.click and abortusinformatie.nl share IP numbers with distributiontheory.cfd.

Name Servers

distributiontheory.cfd is delegated to two name servers: brad.ns.cloudflare.com and emma.ns.cloudflare.com.

distributiontheory.cfd uses the same name server setup as other domains such as blocked.domains, bathcemetery.info, dorotakaminska.pl, weatherpopcorn.xyz and vesselsystem.xyz.

distributiontheory.cfd shares name servers with other domains at least partially, for example mhlmr.com, pgbkk999.today, portaldereserva.com, americanfoods.co.uk and learnsharp.de.

These name servers are commonly used with leif.ns.cloudflare.com.

Host names with six IP numbers: host name brad.ns.cloudflare.com points to: 2606:4700:58::adf5:3b69, 2803:f800:50::6ca2:c169, 2a06:98c1:50::ac40:2169, 108.162.193.105, 172.64.33.105 and 173.245.59.105; host name emma.ns.cloudflare.com points to: 2606:4700:50::adf5:3a70, 2803:f800:50::6ca2:c070, 2a06:98c1:50::ac40:2070, 108.162.192.112, 172.64.32.112 and 173.245.58.112.

distributiontheory.cfd - robtex.com