`t4u.us`

DNSSEC	⚠️ Not signed
A	2606:4700:3030::ac43:a755^{🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3035::6815:5317^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.83.23^{Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.167.85^{🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`melinda.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3ac6^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`melinda.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c0c6^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`melinda.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:20c6^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`melinda.ns.cloudflare.com`
		A	108.162.192.198^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`melinda.ns.cloudflare.com`
		A	172.64.32.198^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`melinda.ns.cloudflare.com`
		A	173.245.58.198^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`melinda.ns.cloudflare.com`
NS	`sean.ns.cloudflare.com`
		A	2606:4700:58::adf5:3be7^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`sean.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c1e7^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`sean.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:21e7^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`sean.ns.cloudflare.com`
		A	108.162.193.231^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`sean.ns.cloudflare.com`
		A	172.64.33.231^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`sean.ns.cloudflare.com`
		A	173.245.59.231^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`sean.ns.cloudflare.com`
MX	`mx01.mail.icloud.com` ⭐
		A	17.42.251.62^{🇺🇸 Apple17.42.0.0/16}
			PTR	`mx01.mail.icloud.com`
			PTR	`mx02.mail.icloud.com`
			PTR	`mx3.mail.icloud.com`
		A	17.56.9.31^{🇺🇸 Apple17.56.9.0/24}
			PTR	`mx01.mail.icloud.com`
			PTR	`mx02.mail.icloud.com`
		A	17.57.152.5^{🇺🇸 Apple17.57.152.0/23}
			PTR	`ic4-privaterelay.appleid.com`
			PTR	`smtp1.ic4-privaterelay.appleid.com`
			PTR	`mx01.mail.icloud.com`
			PTR	`mx02.mail.icloud.com`
		A	17.57.154.33^{🇺🇸 Apple17.57.154.0/24}
			PTR	`mx01.mail.icloud.com`
			PTR	`mx02.mail.icloud.com`
		A	17.57.155.25^{🇺🇸 Apple17.57.155.0/24}
			PTR	`mx01.mail.icloud.com`
			PTR	`mx02.mail.icloud.com`
		A	17.57.156.30^{🇺🇸 Apple17.57.156.0/24}
			PTR	`mx01.mail.icloud.com`
			PTR	`mx02.mail.icloud.com`
MX	`mx02.mail.icloud.com` ⭐
		A	17.42.251.62^{🇺🇸 Apple17.42.0.0/16}
			PTR	`mx01.mail.icloud.com`
			PTR	`mx02.mail.icloud.com`
			PTR	`mx3.mail.icloud.com`
		A	17.56.9.31^{🇺🇸 Apple17.56.9.0/24}
			PTR	`mx01.mail.icloud.com`
			PTR	`mx02.mail.icloud.com`
		A	17.57.152.5^{🇺🇸 Apple17.57.152.0/23}
			PTR	`ic4-privaterelay.appleid.com`
			PTR	`smtp1.ic4-privaterelay.appleid.com`
			PTR	`mx01.mail.icloud.com`
			PTR	`mx02.mail.icloud.com`
		A	17.57.154.33^{🇺🇸 Apple17.57.154.0/24}
			PTR	`mx01.mail.icloud.com`
			PTR	`mx02.mail.icloud.com`
		A	17.57.155.25^{🇺🇸 Apple17.57.155.0/24}
			PTR	`mx01.mail.icloud.com`
			PTR	`mx02.mail.icloud.com`
		A	17.57.156.30^{🇺🇸 Apple17.57.156.0/24}
			PTR	`mx01.mail.icloud.com`
			PTR	`mx02.mail.icloud.com`
TXT	`apple-domain=yi4XOp2k42Zf3q6A`
TXT	`v=spf1 include:icloud.com ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.83.23, 172.67.167.85
		IPv6 hints	2606:4700:3030::ac43:a755, 2606:4700:3035::6815:5317
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=192, name=cloudflare-ech.com
SOA	`melinda.ns.cloudflare.com`dns@cloudflare.com serial=2410318027

`us`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.cctld.us` ⭐
	NS	`b.cctld.us`
	NS	`f.cctld.us`
	NS	`k.cctld.us`
	NS	`m.cctld.us`
	NS	`n.cctld.us`
	NS	`w.cctld.us`
	NS	`x.cctld.us`
	NS	`y.cctld.us`
	SOA	`a.cctld.us`admin@tldns.godaddy serial=1786583722

Same first word

t4u.email

t4u.com.tw

t4u.co.nz

t4u.biz

t4u.online

t4u.org

t4u.de

t4u.com

t4u.at

t4u.info

t4u.bz

t4u.ma

t4u.eu

t4u.it

t4u.nu

t4u.shop

t4u.ch

t4u.com.br

t4u.co.jp

t4u.su

t4u.no

t4u.ru

t4u.tv

t4u.us

t4u.pl

t4u.mobi

t4u.cz

Similar names

tu4.com

u4t.de

4ut.jp

tu4.net

4tu.co

tu4.me

ut4.net

ut4.de

4ut.ir

u4t.com

tu4.co.uk

4ut.mobi

4tu.cn

ut4.com

4tu.net

tu4.cn

u4t.cc

u4t.org

4tu.com

tu4.org

4tu.nl

tu4.de

ut4.ch

4tu.it

tu4.ru

ut4.us

DNS History

13 records (8 active, 5 former)

●NSmelinda.ns.cloudflare.com2026-07-31 → 2026-08-13 · 3 obs

○ 2016-03-23 07:53:30
● 2026-07-31 14:24:40
● 2026-08-13 02:07:46

○NSno-dyn-updates.san.yahoo.com2015-12-18 → 2016-03-23 · 4 obs

● 2015-12-18 18:32:52
● 2016-03-23 07:53:30
○ 2026-07-31 14:24:40
○ 2026-08-13 02:07:46

●NSsean.ns.cloudflare.com2026-07-31 → 2026-08-13 · 3 obs

○ 2016-03-23 07:53:30
● 2026-07-31 14:24:40
● 2026-08-13 02:07:46

○NSyns1.yahoo.com2015-12-18 → 2016-03-23 · 4 obs

● 2015-12-18 18:32:52
● 2016-03-23 07:53:30
○ 2026-07-31 14:24:40
○ 2026-08-13 02:07:46

○NSyns2.yahoo.com2015-12-18 → 2016-03-23 · 4 obs

● 2015-12-18 18:32:52
● 2016-03-23 07:53:30
○ 2026-07-31 14:24:40
○ 2026-08-13 02:07:46

○MXmx-biz.mail.am0.yahoodns.net2015-12-18 → 2016-03-23 · 4 obs

● 2015-12-18 18:32:52
● 2016-03-23 07:53:30
○ 2026-07-31 14:24:40
○ 2026-08-13 02:07:46

●MXmx01.mail.icloud.com2026-07-31 → 2026-08-13 · 3 obs

○ 2016-03-23 07:53:30
● 2026-07-31 14:24:40
● 2026-08-13 02:07:46

●MXmx02.mail.icloud.com2026-07-31 → 2026-08-13 · 3 obs

○ 2016-03-23 07:53:30
● 2026-07-31 14:24:40
● 2026-08-13 02:07:46

●A104.21.83.232026-07-31 → 2026-08-13 · 3 obs

○ 2016-03-23 07:53:30
● 2026-07-31 14:24:40
● 2026-08-13 02:07:46

●A172.67.167.852026-07-31 → 2026-08-13 · 3 obs

○ 2016-03-23 07:53:30
● 2026-07-31 14:24:40
● 2026-08-13 02:07:46

●A2606:4700:3030::ac43:a7552026-07-31 → 2026-08-13 · 3 obs

○ 2016-03-23 07:53:30
● 2026-07-31 14:24:40
● 2026-08-13 02:07:46

●A2606:4700:3035::6815:53172026-07-31 → 2026-08-13 · 3 obs

○ 2016-03-23 07:53:30
● 2026-07-31 14:24:40
● 2026-08-13 02:07:46

○A98.139.135.1292015-12-18 → 2016-03-23 · 4 obs

● 2015-12-18 18:32:52
● 2016-03-23 07:53:30
○ 2026-07-31 14:24:40
○ 2026-08-13 02:07:46

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
us	m.cctld.us, k.cctld.us, b.cctld.us, x.cctld.us...	-
t4u.us	sean.ns.cloudflare.com, melinda.ns.cloudflare.com	-

✅ Authoritative Response

Server:173.245.59.231

NS records: sean.ns.cloudflare.com, melinda.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for t4u.us (unsigned zone)

⏱️ Timing

Total: 773ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.167.85, 104.21.83.23`
AAAA	2	`2606:4700:3030::ac43:a755, 2606:4700:3035::6815:5317`
NS	2	`melinda.ns.cloudflare.com, sean.ns.cloudflare.com`
MX	2	`mx01.mail.icloud.com (pri: 10), mx02.mail.icloud.com (pri: 10)`
TXT	2	`apple-domain=yi4XOp2k42Zf3q6A, v=spf1 include:icloud.com ~all`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`melinda.ns.cloudflare.com dns.cloudflare`

Analysis

IP Addresses

t4u.us directs to four IP numbers, which are 104.21.83.23, 172.67.167.85, 2606:4700:3030::ac43:a755 and 2606:4700:3035::6815:5317.

lcfc.it, mail.qatarmark.com, icl-growingsolutions.it and two other host names share IP numbers with t4u.us.

Name Servers

The NS records for t4u.us delegate to melinda.ns.cloudflare.com and sean.ns.cloudflare.com.

t4u.us uses the same name servers as several other domains — among them daelim.org, jka-vlaanderen.be, musiknet.se and two more.

At least some of t4u.us's name servers are shared with other domains, for example centrocorporativocumbres.com.mx, salaamtv.com, washmaidhq.click and two more.

It is common for these name servers to be used in conjunction with the name servers luciana.ns.cloudflare.com, boyd.ns.cloudflare.com and kenneth.ns.cloudflare.com.

Hostnames that resolve to 6 IP addresses:

melinda.ns.cloudflare.com maps to 108.162.192.198, 172.64.32.198, 173.245.58.198 and 3 additional IP addresses.

sean.ns.cloudflare.com maps to 108.162.193.231, 172.64.33.231, 173.245.59.231 and 3 additional IP addresses.

Mail Servers

Mail for t4u.us is handled by two mail servers — mx01.mail.icloud.com and mx02.mail.icloud.com.

t4u.us uses an identical mail server configuration to several other domains — among them efusionnetworks.com, patife.com, copy-cat.in and two more.

t4u.us overlaps on mail servers with certain other domains, expresssl.com among them.

Hostnames that resolve to 6 IP addresses:

mx01.mail.icloud.com maps to 17.42.251.62, 17.56.9.31, 17.57.152.5 and 3 additional IP addresses.

mx02.mail.icloud.com maps to 17.42.251.62, 17.56.9.31, 17.57.152.5 and 3 additional IP addresses.

mx01.mail.icloud.com and mx02.mail.icloud.com each have 17.42.251.62 IP addresses.

mx01.mail.icloud.com and mx02.mail.icloud.com each have 17.56.9.31 IP addresses.

mx01.mail.icloud.com and mx02.mail.icloud.com each have 17.57.152.5 IP addresses.

mx01.mail.icloud.com and mx02.mail.icloud.com each have 17.57.154.33 IP addresses.

mx01.mail.icloud.com and mx02.mail.icloud.com each have 17.57.155.25 IP addresses.

mx01.mail.icloud.com and mx02.mail.icloud.com each have 17.57.156.30 IP addresses.