`zero.dev`

DNSSEC	⚠️ Not signed
A	2606:4700:3030::6815:58cf^{Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3031::ac43:995d^{Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.88.207^{Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.153.93^{Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`fred.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b71^{Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
		A	2803:f800:50::6ca2:c171^{Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
		A	2a06:98c1:50::ac40:2171^{Cloudflare2a06:98c1:50::/45}
		A	108.162.193.113^{Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
		A	172.64.33.113^{Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
		A	173.245.59.113^{Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
NS	`kim.ns.cloudflare.com`
		A	2606:4700:50::adf5:3a7e^{Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
		A	2803:f800:50::6ca2:c07e^{Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
		A	2a06:98c1:50::ac40:207e^{Cloudflare2a06:98c1:50::/45}
		A	108.162.192.126^{Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
		A	172.64.32.126^{Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
		A	173.245.58.126^{Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
MX	`in1-smtp.messagingengine.com` ⭐
		A	103.168.172.216^{🇺🇸 FASTMAILPTYLTD-AS-AP103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-01.messagingengine.com`
		A	103.168.172.217^{🇺🇸 FASTMAILPTYLTD-AS-AP103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-02.messagingengine.com`
		A	103.168.172.218^{🇺🇸 FASTMAILPTYLTD-AS-AP103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-03.messagingengine.com`
		A	103.168.172.219^{🇺🇸 FASTMAILPTYLTD-AS-AP103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-04.messagingengine.com`
		A	103.168.172.220^{🇺🇸 FASTMAILPTYLTD-AS-AP103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-05.messagingengine.com`
		A	103.168.172.221^{🇺🇸 FASTMAILPTYLTD-AS-AP103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-06.messagingengine.com`
		A	103.168.172.222^{🇺🇸 FASTMAILPTYLTD-AS-AP103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-07.messagingengine.com`
		A	103.168.172.223^{🇺🇸 FASTMAILPTYLTD-AS-AP103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-08.messagingengine.com`
MX	`in2-smtp.messagingengine.com`⁽²⁰⁾
		A	202.12.124.216^{FASTMAILPTYLTD-AS-AP202.12.124.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`stl-mx-01.messagingengine.com`
		A	202.12.124.217^{FASTMAILPTYLTD-AS-AP202.12.124.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`stl-mx-02.messagingengine.com`
		A	202.12.124.218^{FASTMAILPTYLTD-AS-AP202.12.124.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`stl-mx-03.messagingengine.com`
		A	202.12.124.219^{FASTMAILPTYLTD-AS-AP202.12.124.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`stl-mx-04.messagingengine.com`
TXT	`keybase-site-verification=MrXvG66qcTzlSnK5BLoNiCatyNhN6-KIW6ydhKTyhRk`
TXT	`v=spf1 include:spf.messagingengine.com ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.88.207, 172.67.153.93
		IPv6 hints	2606:4700:3030::6815:58cf, 2606:4700:3031::ac43:995d
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=251, name=cloudflare-ech.com
SOA	`fred.ns.cloudflare.com`dns@cloudflare.com serial=2404241810

`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

🔒 HSTS Preload (+subdomains)

DNS History

14 records (8 active, 6 former)

●NSfred.ns.cloudflare.com2026-03-22 → 2026-07-12 · 2 obs

● 2026-03-22 23:55:24
● 2026-07-12 08:25:54

●NSkim.ns.cloudflare.com2026-03-22 → 2026-07-12 · 2 obs

● 2026-03-22 23:55:24
● 2026-07-12 08:25:54

●MXin1-smtp.messagingengine.com2026-03-22 → 2026-07-12 · 3 obs

○ 2017-01-22 07:47:48
● 2026-03-22 23:55:24
● 2026-07-12 08:25:54

●MXin2-smtp.messagingengine.com2026-03-22 → 2026-07-12 · 3 obs

○ 2017-01-22 07:47:48
● 2026-03-22 23:55:24
● 2026-07-12 08:25:54

○MXyour-dns-needs-immediate-attention.dev2017-01-22 → 2017-01-22 · 3 obs

● 2017-01-22 07:47:48
○ 2026-03-22 23:55:24
○ 2026-07-12 08:25:54

●A104.21.88.2072026-03-22 → 2026-07-12 · 6 obs

○ 2017-01-22 07:47:48
● 2026-03-22 23:55:24
● 2026-04-24 19:46:28
○ 2026-04-28 02:27:22
● 2026-04-29 20:00:14
● 2026-07-12 08:25:54

○A127.0.53.532017-01-22 → 2017-01-22 · 3 obs

● 2017-01-22 07:47:48
○ 2026-03-22 23:55:24
○ 2026-07-12 08:25:54

●A172.67.153.932026-03-22 → 2026-07-12 · 6 obs

○ 2017-01-22 07:47:48
● 2026-03-22 23:55:24
● 2026-04-24 19:46:28
○ 2026-04-28 02:27:22
● 2026-04-29 20:00:14
● 2026-07-12 08:25:54

○A188.114.96.02026-04-28 → 2026-04-28 · 5 obs

○ 2026-03-22 23:55:24
○ 2026-04-24 19:46:28
● 2026-04-28 02:27:22
○ 2026-04-29 20:00:14
○ 2026-07-12 08:25:54

○A188.114.97.02026-04-28 → 2026-04-28 · 5 obs

○ 2026-03-22 23:55:24
○ 2026-04-24 19:46:28
● 2026-04-28 02:27:22
○ 2026-04-29 20:00:14
○ 2026-07-12 08:25:54

●A2606:4700:3030::6815:58cf2026-03-22 → 2026-07-12 · 6 obs

○ 2017-01-22 07:47:48
● 2026-03-22 23:55:24
● 2026-04-24 19:46:28
○ 2026-04-28 02:27:22
● 2026-04-29 20:00:14
● 2026-07-12 08:25:54

●A2606:4700:3031::ac43:995d2026-03-22 → 2026-07-12 · 6 obs

○ 2017-01-22 07:47:48
● 2026-03-22 23:55:24
● 2026-04-24 19:46:28
○ 2026-04-28 02:27:22
● 2026-04-29 20:00:14
● 2026-07-12 08:25:54

○A2a06:98c1:3120::2026-04-28 → 2026-04-28 · 5 obs

○ 2026-03-22 23:55:24
○ 2026-04-24 19:46:28
● 2026-04-28 02:27:22
○ 2026-04-29 20:00:14
○ 2026-07-12 08:25:54

○A2a06:98c1:3121::2026-04-28 → 2026-04-28 · 5 obs

○ 2026-03-22 23:55:24
○ 2026-04-24 19:46:28
● 2026-04-28 02:27:22
○ 2026-04-29 20:00:14
○ 2026-07-12 08:25:54

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
dev	ns-tld5.charlestonroadregistry.com, ns-tld2.charlestonroadregistry.com, ns-tld3.charlestonroadregistry.com, ns-tld4.charlestonroadregistry.com...	10 records
zero.dev	kim.ns.cloudflare.com, fred.ns.cloudflare.com	-

✅ Authoritative Response

Server:173.245.58.126

NS records: kim.ns.cloudflare.com, fred.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for zero.dev (unsigned zone)

⏱️ Timing

Total: 4445ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.153.93, 104.21.88.207`
AAAA	2	`2606:4700:3033::ac43:995d, 2606:4700:3032::6815:58cf`
NS	2	`fred.ns.cloudflare.com, kim.ns.cloudflare.com`
MX	2	`in1-smtp.messagingengine.com (pri: 10), in2-smtp.messagingengine.com (pri: 20)`
TXT	2	`keybase-site-verification=MrXvG66qcTzlSn, v=spf1 include:spf.messagingengine.com ~`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`fred.ns.cloudflare.com dns.cloudflare.co`

📌 Glue Records Collected

Total: 10

Out-of-bailiwick: 10 (ns-tld5.charlestonroadregistry.com, ns-tld4.charlestonroadregistry.com, ns-tld3.charlestonroadregistry.com...)

Analysis

IP Addresses

zero.dev directs to four IP numbers, which are 104.21.88.207, 172.67.153.93, 2606:4700:3030::6815:58cf and 2606:4700:3031::ac43:995d.

Name Servers

zero.dev has two authoritative name servers — fred.ns.cloudflare.com and kim.ns.cloudflare.com.

Hostnames that resolve to 6 IP addresses:

fred.ns.cloudflare.com points to 108.162.193.113, 172.64.33.113, 173.245.59.113 and 3 other IP addresses.

kim.ns.cloudflare.com points to 108.162.192.126, 172.64.32.126, 173.245.58.126 and 3 other IP addresses.

Mail Servers

Mail for zero.dev is handled by two mail servers — in1-smtp.messagingengine.com and in2-smtp.messagingengine.com.

Hostnames that resolve to 8 IP addresses:

in1-smtp.messagingengine.com points to 103.168.172.216, 103.168.172.217, 103.168.172.218 and 5 other IP addresses.

Hosts that point to four IP numbers:

in2-smtp.messagingengine.com directs to 202.12.124.216, 202.12.124.217, 202.12.124.218 and 202.12.124.219.

zero.dev - robtex.com

zero.dev

dev

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

📌 Glue Records Collected

Analysis

IP Addresses

Name Servers

Mail Servers

`zero.dev`

`dev`