`cryptography.blue`

DNSSEC	🔒 Signed (DS record present)
A	2606:4700:3037::6815:1a14^{🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3037::ac43:8728^{🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.26.20^{Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.135.40^{🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`jerry.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3bb6^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jerry.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c1b6^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`jerry.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:21b6^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`jerry.ns.cloudflare.com`
		A	108.162.193.182^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jerry.ns.cloudflare.com`
		A	172.64.33.182^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jerry.ns.cloudflare.com`
		A	173.245.59.182^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jerry.ns.cloudflare.com`
NS	`kate.ns.cloudflare.com`
		A	2606:4700:50::adf5:3a7c^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`kate.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c07c^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`kate.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:207c^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`kate.ns.cloudflare.com`
		A	108.162.192.124^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`kate.ns.cloudflare.com`
		A	172.64.32.124^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`kate.ns.cloudflare.com`
		A	173.245.58.124^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`kate.ns.cloudflare.com`
TXT	`google-site-verification=JpNlZjFKCNpi31BEVVv9UOEVA5-m3XnQCgpLddqfWlU`
TXT	`v=spf1 ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4	104.21.26.20, 172.67.135.40
		IPv6	2606:4700:3037::6815:1a14, 2606:4700:3037::ac43:8728
SOA	`jerry.ns.cloudflare.com`dns@cloudflare.com serial=2399536376

`blue`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a0.nic.blue` ⭐
	NS	`a2.nic.blue`
	NS	`b0.nic.blue`
	NS	`b2.nic.blue`
	NS	`c0.nic.blue`
	SOA	`a0.nic.blue`hostmaster@donuts.email serial=1774430163

🔒 HSTS Preload (+subdomains)

Same first word

Similar names

cyrptography.com

DNS History

6 records (6 active, 0 former)

●NSjerry.ns.cloudflare.com2026-02-26 → 2026-03-25 · 2 obs

● 2026-02-26 13:36:26
● 2026-03-25 09:37:40

●NSkate.ns.cloudflare.com2026-02-26 → 2026-03-25 · 2 obs

● 2026-02-26 13:36:26
● 2026-03-25 09:37:40

●A104.21.26.202026-02-26 → 2026-03-25 · 2 obs

● 2026-02-26 13:36:26
● 2026-03-25 09:37:40

●A172.67.135.402026-02-26 → 2026-03-25 · 2 obs

● 2026-02-26 13:36:26
● 2026-03-25 09:37:40

●A2606:4700:3037::6815:1a142026-02-26 → 2026-03-25 · 2 obs

● 2026-02-26 13:36:26
● 2026-03-25 09:37:40

●A2606:4700:3037::ac43:87282026-02-26 → 2026-03-25 · 2 obs

● 2026-02-26 13:36:26
● 2026-03-25 09:37:40

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
blue	a2.nic.blue, b2.nic.blue, a0.nic.blue, b0.nic.blue...	10 records
cryptography.blue	kate.ns.cloudflare.com, jerry.ns.cloudflare.com	-

✅ Authoritative Response

Server:173.245.59.182

NS records: kate.ns.cloudflare.com, jerry.ns.cloudflare.com

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 671ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.26.20, 172.67.135.40`
AAAA	2	`2606:4700:3037::ac43:8728, 2606:4700:3037::6815:1a14`
NS	2	`jerry.ns.cloudflare.com, kate.ns.cloudflare.com`
TXT	2	`google-site-verification=JpNlZjFKCNpi31B, v=spf1 ~all`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`jerry.ns.cloudflare.com dns.cloudflare.c`

📌 Glue Records Collected

Total: 10

In-bailiwick: 10 (c0.nic.blue, b2.nic.blue, b0.nic.blue...)

Analysis

IP Addresses

cryptography.blue maps to four IP numbers: 2606:4700:3037::6815:1a14, 2606:4700:3037::ac43:8728, 104.21.26.20 and 172.67.135.40.

other host names include www.universalavenue.se, annecrile.com, gradysautosales.com, roseoil.eu.com and bumper-cranes.com; they share IP numbers with cryptography.blue.

Name Servers

Two name servers jerry.ns.cloudflare.com and kate.ns.cloudflare.com handle the delegation for cryptography.blue.

cryptography.blue shares the same name server setup as other domains, for instance cc16888.com, 66bb.cheap, tg88ny.com, tr88.red and 168c168.com.

cryptography.blue at least partially shares name servers with other domains, for instance thegreenergroup.com, classescort.it, stianengen.com, angelmartin.org and 881v.casino.

These name servers are commonly used alongside sandy.ns.cloudflare.com.

Six IP addresses per host:

jerry.ns.cloudflare.com points to 2606:4700:58::adf5:3bb6, 2803:f800:50::6ca2:c1b6, 2a06:98c1:50::ac40:21b6, 108.162.193.182, 172.64.33.182 and 173.245.59.182; kate.ns.cloudflare.com points to 2606:4700:50::adf5:3a7c, 2803:f800:50::6ca2:c07c, 2a06:98c1:50::ac40:207c, 108.162.192.124, 172.64.32.124 and 173.245.58.124

cryptography.blue - robtex.com