b4k.dev - dns.ninja

`b4k.dev`

DNSSEC	⚠️ Not signed
A	2606:4700:3030::ac43:c39f^{🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3032::6815:2497^{🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.36.151^{Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.195.159^{🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`eric.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b70^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`eric.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c170^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`eric.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2170^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`eric.ns.cloudflare.com`
		A	108.162.193.112^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`eric.ns.cloudflare.com`
		A	172.64.33.112^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`eric.ns.cloudflare.com`
		A	173.245.59.112^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`eric.ns.cloudflare.com`
NS	`lucy.ns.cloudflare.com`
		A	2606:4700:50::adf5:3a85^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lucy.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c085^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`lucy.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2085^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`lucy.ns.cloudflare.com`
		A	108.162.192.133^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
		A	172.64.32.133^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
		A	173.245.58.133^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lucy.ns.cloudflare.com`
MX	`mailserver.purelymail.com` ⭐
		A	18.204.123.63^{🇺🇸 Amazon18.204.0.0/14 EC2 IAD prefix}
			PTR	`ec2-18-204-123-63.compute-1.amazonaws.com`
TXT	`purelymail_ownership_proof=a25d7b5804482b3b509b466cb0c9b21cb8fe47c255f57c4150...`
TXT	`v=spf1 include:_spf.purelymail.com ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.36.151, 172.67.195.159
		IPv6 hints	2606:4700:3030::ac43:c39f, 2606:4700:3032::6815:2497
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=74, name=cloudflare-ech.com
SOA	`eric.ns.cloudflare.com`dns@cloudflare.com serial=2410330103

`dev`

	DNSSEC	🔒 Signed (DS record present)
	NS	`ns-tld1.charlestonroadregistry.com` ⭐
	NS	`ns-tld2.charlestonroadregistry.com`
	NS	`ns-tld3.charlestonroadregistry.com`
	NS	`ns-tld4.charlestonroadregistry.com`
	NS	`ns-tld5.charlestonroadregistry.com`
	SOA	`ns-tld1.charlestonroadregistry.com`cloud-dns-hostmaster@google.com serial=1

📈 Tranco rank: #130,237
🔒 HSTS Preload (+subdomains)

Subdomains

arch.b4k.dev

plausible.b4k.dev

Same first word

b4k.net

b4k.com.br

b4k.be

b4k.dk

b4k.cn

b4k.ir

b4k.co

b4k.eu

b4k.info

b4k.de

b4k.org

b4k.ch

b4k.dev

b4k.nl

b4k.cz

Similar names

k4b.es

k4b.pl

k4b.ru

kb4.it

4kb.org

k4b.ch

bk4.nl

4bk.co.uk

k4b.ca

bk4.net

bk4.de

bk4.cn

k4b.com

4bk.com

4bk.jp

4bk.de

kb4.cc

4kb.de

bk4.mobi

4bk.net

kb4.cn

bk4.com

bk4.be

4kb.cn

k4b.nl

kb4.de

kb4.com

kb4.net

kb4.us

4kb.com

4kb.net

kb4.ch

bk4.us

4kb.ru

4kb.ir

4kb.dk

kb4.info

4bk.ru

bk4.ru

bk4.com.vn

4kb.co.uk

k4b.eu

kb4.io

kb4.ru

kb4.org

kb4.cz

k4b.net

k4b.de

4kb.no

DNS History

9 records (7 active, 2 former)

●NSeric.ns.cloudflare.com2026-03-06 → 2026-07-24 · 2 obs

● 2026-03-06 04:28:32
● 2026-07-24 16:11:52

●NSlucy.ns.cloudflare.com2026-03-06 → 2026-07-24 · 2 obs

● 2026-03-06 04:28:32
● 2026-07-24 16:11:52

●MXmailserver.purelymail.com2026-03-06 → 2026-07-24 · 2 obs

● 2026-03-06 04:28:32
● 2026-07-24 16:11:52

●A104.21.36.1512026-03-06 → 2026-07-24 · 2 obs

● 2026-03-06 04:28:32
● 2026-07-24 16:11:52

●A172.67.195.1592026-03-06 → 2026-07-24 · 2 obs

● 2026-03-06 04:28:32
● 2026-07-24 16:11:52

●A2606:4700:3030::ac43:c39f2026-07-01 → 2026-07-24 · 3 obs

○ 2026-05-28 19:10:48
● 2026-07-01 06:50:52
● 2026-07-24 16:11:52

●A2606:4700:3032::6815:24972026-07-01 → 2026-07-24 · 3 obs

○ 2026-05-28 19:10:48
● 2026-07-01 06:50:52
● 2026-07-24 16:11:52

○A2606:4700:3034::6815:24972026-03-06 → 2026-05-28 · 4 obs

● 2026-03-06 04:28:32
● 2026-05-28 19:10:48
○ 2026-07-01 06:50:52
○ 2026-07-24 16:11:52

○A2606:4700:3037::ac43:c39f2026-03-06 → 2026-05-28 · 4 obs

● 2026-03-06 04:28:32
● 2026-05-28 19:10:48
○ 2026-07-01 06:50:52
○ 2026-07-24 16:11:52

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
dev	ns-tld5.charlestonroadregistry.com, ns-tld3.charlestonroadregistry.com, ns-tld4.charlestonroadregistry.com, ns-tld1.charlestonroadregistry.com...	-
b4k.dev	eric.ns.cloudflare.com, lucy.ns.cloudflare.com	-

✅ Authoritative Response

Server:172.64.33.112

NS records: eric.ns.cloudflare.com, lucy.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for b4k.dev (unsigned zone)

⏱️ Timing

Total: 458ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.36.151, 172.67.195.159`
AAAA	2	`2606:4700:3032::6815:2497, 2606:4700:3030::ac43:c39f`
NS	2	`eric.ns.cloudflare.com, lucy.ns.cloudflare.com`
MX	1	`mailserver.purelymail.com (pri: 0)`
TXT	2	`purelymail_ownership_proof=a25d7b5804482, v=spf1 include:_spf.purelymail.com ~all`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`eric.ns.cloudflare.com dns.cloudflare.co`

Analysis

Hierarchy

arch.b4k.dev and plausible.b4k.dev are both subdomains of b4k.dev.

IP Addresses

b4k.dev has four IP addresses: 104.21.36.151, 172.67.195.159, 2606:4700:3030::ac43:c39f and 2606:4700:3032::6815:2497.

apexehs.com, www.felidae.ru, chrisyocum.com and two other host names share IP numbers with b4k.dev.

Name Servers

Two name servers handle the delegation for b4k.dev: eric.ns.cloudflare.com and lucy.ns.cloudflare.com.

b4k.dev uses the same name servers as several other domains — among them aizon.cn, gns3.me, gns3.net and two more.

b4k.dev has at least partial name server overlap with other domains, such as wallshelvestore.co.uk, yym.kr, mullasadra.ba and two others.

These name servers tend to appear together with the name servers cody.ns.cloudflare.com, bayan.ns.cloudflare.com and laylah.ns.cloudflare.com.

Hostnames that resolve to 6 IP addresses:

eric.ns.cloudflare.com resolves to 108.162.193.112, 172.64.33.112 and 173.245.59.112 among others, with 3 other IP addresses in total.

lucy.ns.cloudflare.com resolves to 108.162.192.133, 172.64.32.133 and 173.245.58.133 among others, with 3 other IP addresses in total.

Mail Servers

Mail for b4k.dev is handled by a single mail server, mailserver.purelymail.com.

b4k.dev uses an identical mail server configuration to several other domains — among them presa.cn, xincity.com, idcshop.com and two more.

The mail servers of b4k.dev are at least partially shared with other domains, including jordi.net.au.

mailserver.purelymail.com carries a single IP number, which is 18.204.123.63.