`smtpu.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3033::6815:236a^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3037::ac43:d9bb^{🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.35.106^{Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.217.187^{🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`johnny.ns.cloudflare.com` ⭐
		A	2606:4700:58::a29f:2cba^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`johnny.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c3ba^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`johnny.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:23ba^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`johnny.ns.cloudflare.com`
		A	108.162.195.186^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`johnny.ns.cloudflare.com`
		A	162.159.44.186^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`johnny.ns.cloudflare.com`
		A	172.64.35.186^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`johnny.ns.cloudflare.com`
NS	`rachel.ns.cloudflare.com`
		A	2606:4700:50::adf5:3ad7^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`rachel.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c0d7^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`rachel.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:20d7^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`rachel.ns.cloudflare.com`
		A	108.162.192.215^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`rachel.ns.cloudflare.com`
		A	172.64.32.215^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`rachel.ns.cloudflare.com`
		A	173.245.58.215^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`rachel.ns.cloudflare.com`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.35.106, 172.67.217.187
		IPv6 hints	2606:4700:3033::6815:236a, 2606:4700:3037::ac43:d9bb
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=255, name=cloudflare-ech.com
SOA	`johnny.ns.cloudflare.com`dns@cloudflare.com serial=2409950866

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1785403112

Same first word

smtpu.com

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ustmp.com

stump.com.au

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utsmp.com

stump.com

psutm.com

ptusm.com

tsump.com

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stump.io

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stmup.cc

tmusp.com

stump.at

stump.email

stump.info

pumts.com

stump.town

stump.nl

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utmps.com

pmsut.com

suptm.com

stump.ru

sumpt.com

pmstu.com

upstm.info

tpmus.com

stmpu.com

sptmu.com

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usmtp.com

smutp.ru

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mpsut.com

DNS History

24 records (6 active, 18 former)

○NSa.share-dns.com2026-05-03 → 2026-05-03 · 4 obs

○ 2017-01-22 07:04:00
● 2026-05-03 19:21:58
○ 2026-05-30 11:50:18
○ 2026-07-30 09:43:50

○NSa3.share-dns.com2026-05-03 → 2026-05-03 · 4 obs

○ 2017-01-22 07:04:00
● 2026-05-03 19:21:58
○ 2026-05-30 11:50:18
○ 2026-07-30 09:43:50

○NSb.share-dns.net2026-05-03 → 2026-05-03 · 4 obs

○ 2017-01-22 07:04:00
● 2026-05-03 19:21:58
○ 2026-05-30 11:50:18
○ 2026-07-30 09:43:50

○NSb3.share-dns.net2026-05-03 → 2026-05-03 · 4 obs

○ 2017-01-22 07:04:00
● 2026-05-03 19:21:58
○ 2026-05-30 11:50:18
○ 2026-07-30 09:43:50

○NSdns1.iidns.com2015-08-09 → 2016-05-07 · 4 obs

● 2015-08-09 01:52:24
● 2016-05-07 05:17:52
○ 2017-01-22 07:04:00
○ 2026-07-30 09:43:50

○NSdns2.iidns.com2015-08-09 → 2016-05-07 · 4 obs

● 2015-08-09 01:52:24
● 2016-05-07 05:17:52
○ 2017-01-22 07:04:00
○ 2026-07-30 09:43:50

○NSdns3.iidns.com2015-08-09 → 2016-05-07 · 4 obs

● 2015-08-09 01:52:24
● 2016-05-07 05:17:52
○ 2017-01-22 07:04:00
○ 2026-07-30 09:43:50

○NSdns4.iidns.com2015-08-09 → 2016-05-07 · 4 obs

● 2015-08-09 01:52:24
● 2016-05-07 05:17:52
○ 2017-01-22 07:04:00
○ 2026-07-30 09:43:50

○NSdns5.iidns.com2015-08-09 → 2016-05-07 · 4 obs

● 2015-08-09 01:52:24
● 2016-05-07 05:17:52
○ 2017-01-22 07:04:00
○ 2026-07-30 09:43:50

○NSdns6.iidns.com2015-08-09 → 2016-05-07 · 4 obs

● 2015-08-09 01:52:24
● 2016-05-07 05:17:52
○ 2017-01-22 07:04:00
○ 2026-07-30 09:43:50

●NSjohnny.ns.cloudflare.com2026-05-30 → 2026-07-30 · 3 obs

○ 2026-05-03 19:21:58
● 2026-05-30 11:50:18
● 2026-07-30 09:43:50

●NSrachel.ns.cloudflare.com2026-05-30 → 2026-07-30 · 3 obs

○ 2026-05-03 19:21:58
● 2026-05-30 11:50:18
● 2026-07-30 09:43:50

●A104.21.35.1062026-05-30 → 2026-07-30 · 7 obs

○ 2026-05-03 19:21:58
● 2026-05-30 11:50:18
○ 2026-06-18 17:56:42
● 2026-06-23 13:57:14
○ 2026-06-30 17:17:12
● 2026-07-08 08:18:30
● 2026-07-30 09:43:50

●A172.67.217.1872026-05-30 → 2026-07-30 · 7 obs

○ 2026-05-03 19:21:58
● 2026-05-30 11:50:18
○ 2026-06-18 17:56:42
● 2026-06-23 13:57:14
○ 2026-06-30 17:17:12
● 2026-07-08 08:18:30
● 2026-07-30 09:43:50

○A188.114.96.02026-06-18 → 2026-06-30 · 6 obs

○ 2026-05-30 11:50:18
● 2026-06-18 17:56:42
○ 2026-06-23 13:57:14
● 2026-06-30 17:17:12
○ 2026-07-08 08:18:30
○ 2026-07-30 09:43:50

○A188.114.97.02026-06-18 → 2026-06-30 · 6 obs

○ 2026-05-30 11:50:18
● 2026-06-18 17:56:42
○ 2026-06-23 13:57:14
● 2026-06-30 17:17:12
○ 2026-07-08 08:18:30
○ 2026-07-30 09:43:50

○A23.81.149.872015-08-09 → 2016-02-22 · 4 obs

● 2015-08-09 01:52:24
● 2016-02-22 20:32:00
○ 2017-01-22 07:04:00
○ 2026-07-30 09:43:50

○A2606:4700:3032::ac43:d9bb2026-05-30 → 2026-06-23 · 6 obs

○ 2026-05-03 19:21:58
● 2026-05-30 11:50:18
○ 2026-06-18 17:56:42
● 2026-06-23 13:57:14
○ 2026-06-30 17:17:12
○ 2026-07-30 09:43:50

●A2606:4700:3033::6815:236a2026-07-08 → 2026-07-30 · 3 obs

○ 2026-06-30 17:17:12
● 2026-07-08 08:18:30
● 2026-07-30 09:43:50

○A2606:4700:3035::6815:236a2026-05-30 → 2026-06-23 · 6 obs

○ 2026-05-03 19:21:58
● 2026-05-30 11:50:18
○ 2026-06-18 17:56:42
● 2026-06-23 13:57:14
○ 2026-06-30 17:17:12
○ 2026-07-30 09:43:50

●A2606:4700:3037::ac43:d9bb2026-07-08 → 2026-07-30 · 3 obs

○ 2026-06-30 17:17:12
● 2026-07-08 08:18:30
● 2026-07-30 09:43:50

○A2a06:98c1:3120::2026-06-18 → 2026-06-30 · 6 obs

○ 2026-05-30 11:50:18
● 2026-06-18 17:56:42
○ 2026-06-23 13:57:14
● 2026-06-30 17:17:12
○ 2026-07-08 08:18:30
○ 2026-07-30 09:43:50

○A2a06:98c1:3121::2026-06-18 → 2026-06-30 · 6 obs

○ 2026-05-30 11:50:18
● 2026-06-18 17:56:42
○ 2026-06-23 13:57:14
● 2026-06-30 17:17:12
○ 2026-07-08 08:18:30
○ 2026-07-30 09:43:50

○A45.194.151.912026-05-03 → 2026-05-03 · 4 obs

○ 2017-01-22 07:04:00
● 2026-05-03 19:21:58
○ 2026-05-30 11:50:18
○ 2026-07-30 09:43:50

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, i.gtld-servers.net, k.gtld-servers.net, c.gtld-servers.net...	-
smtpu.com	rachel.ns.cloudflare.com, johnny.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.192.215

NS records: rachel.ns.cloudflare.com, johnny.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for smtpu.com (unsigned zone)

⏱️ Timing

Total: 140ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.35.106, 172.67.217.187`
AAAA	2	`2606:4700:3037::ac43:d9bb, 2606:4700:3033::6815:236a`
NS	2	`johnny.ns.cloudflare.com, rachel.ns.cloudflare.com`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`johnny.ns.cloudflare.com dns.cloudflare.`

📌 Glue Records Collected

Total: 12

Out-of-bailiwick: 12 (rachel.ns.cloudflare.com, rachel.ns.cloudflare.com, rachel.ns.cloudflare.com...)

Analysis

IP Addresses

smtpu.com directs to four IP numbers, which are 104.21.35.106, 172.67.217.187, 2606:4700:3033::6815:236a and 2606:4700:3037::ac43:d9bb.

xdlex.com, 6-z.top, onestophousing.org and two other host names share IP numbers with smtpu.com.

Name Servers

smtpu.com is delegated to two name servers: johnny.ns.cloudflare.com and rachel.ns.cloudflare.com.

smtpu.com uses the same name servers as several other domains — among them webletron.com, 0335hq.com, mengbushenghua.com and two more.

At least some of smtpu.com's name servers are shared with other domains, for example qhdsunflower.com, mlon.net, nikeslot88a.sbs and two more.

These name servers tend to be deployed in combination with the name servers ivan.ns.cloudflare.com and troy.ns.cloudflare.com.

Hostnames that resolve to 6 IP addresses:

johnny.ns.cloudflare.com resolves to 108.162.195.186, 162.159.44.186, 172.64.35.186 and 3 other IP addresses.

rachel.ns.cloudflare.com resolves to 108.162.192.215, 172.64.32.215, 173.245.58.215 and 3 other IP addresses.

smtpu.com - robtex.com

smtpu.com

com

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

📌 Glue Records Collected

Analysis

IP Addresses

Name Servers

`smtpu.com`

`com`