🛡️Domain Reputation CheckBlocklist, phishing & malware status→

`stackup.engineer`

DNSSEC	⚠️ Not signed
A	217.21.90.71^{🇮🇳 IIHOS001217.21.80.0/20 HOSTINGER IN}
NS	`amy.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3a65^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`amy.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c065^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`amy.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2065^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`amy.ns.cloudflare.com`
		A	108.162.192.101^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`amy.ns.cloudflare.com`
		A	172.64.32.101^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`amy.ns.cloudflare.com`
		A	173.245.58.101^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`amy.ns.cloudflare.com`
NS	`phil.ns.cloudflare.com`
		A	2606:4700:58::adf5:3b89^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`phil.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c189^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`phil.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2189^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`phil.ns.cloudflare.com`
		A	108.162.193.137^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`phil.ns.cloudflare.com`
		A	172.64.33.137^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`phil.ns.cloudflare.com`
		A	173.245.59.137^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`phil.ns.cloudflare.com`
MX	`in1-smtp.messagingengine.com` ⭐
		A	103.168.172.216^{🇺🇸 TELX-AS151847103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-01.messagingengine.com`
		A	103.168.172.217^{🇺🇸 TELX-AS151847103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-02.messagingengine.com`
		A	103.168.172.218^{🇺🇸 TELX-AS151847103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-03.messagingengine.com`
		A	103.168.172.219^{🇺🇸 TELX-AS151847103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-04.messagingengine.com`
		A	103.168.172.220^{🇺🇸 TELX-AS151847103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-05.messagingengine.com`
		A	103.168.172.221^{🇺🇸 TELX-AS151847103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-06.messagingengine.com`
		A	103.168.172.222^{🇺🇸 TELX-AS151847103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-07.messagingengine.com`
		A	103.168.172.223^{🇺🇸 TELX-AS151847103.168.172.0/24 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^{TELX-AS151847202.12.124.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`stl-mx-01.messagingengine.com`
		A	202.12.124.217^{TELX-AS151847202.12.124.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`stl-mx-02.messagingengine.com`
		A	202.12.124.218^{TELX-AS151847202.12.124.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`stl-mx-03.messagingengine.com`
		A	202.12.124.219^{TELX-AS151847202.12.124.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`stl-mx-04.messagingengine.com`
TXT	`mailerlite-domain-verification=645951b5400fb1ed3c5ed606ed1fb0471ea8e2e4`
TXT	`v=spf1 include:spf.messagingengine.com a mx include:_spf.mlsend.com ~all`
SOA	`amy.ns.cloudflare.com`dns@cloudflare.com serial=2412435947

`engineer`

	DNSSEC	🔒 Signed (DS record present)
	NS	`v0n0.nic.engineer` ⭐
	NS	`v0n1.nic.engineer`
	NS	`v0n2.nic.engineer`
	NS	`v0n3.nic.engineer`
	NS	`v2n0.nic.engineer`
	NS	`v2n1.nic.engineer`
	SOA	`v0n0.nic.engineer`hostmaster@donuts.email serial=1787536108

⚠️ On DNS blocklist: spam-tlds

Same first word

stackup.workers.dev

stackup.design

stackup.com

stackup.io

stackup.dev

stackup.co

stackup.co.uk

stackup.win

stackup.co.kr

stackup.fi

stackup.digital

stackup.sh

stackup.expert

stackup.com.au

stackup.cn

stackup.it

stackup.tech

stackup.eu

stackup.ca

stackup.ai

stackup.me

stackup.guru

stackup.jp

stackup.net

stackup.education

stackup.co.jp

stackup.engineer

stackup.org

stackup.casino

stackup.finance

Similar names

upstack.agency

tupacks.com

cuptask.com

skatcup.info

upstack.co

skatcup.com

upstack.com

kutaspc.com

upstack.io

utpacks.com

taskcup.com

skatcup.eu

upstack.net

skatcup.de

upstack.my.id

pustack.com

upstack.site

cputask.com

Previous names

Next names

DNS History

5 records (5 active, 0 former)

●NSamy.ns.cloudflare.com2026-08-20 → 2026-08-24 · 2 obs

● 2026-08-20 20:23:16
● 2026-08-24 01:55:54

●NSphil.ns.cloudflare.com2026-08-20 → 2026-08-24 · 2 obs

● 2026-08-20 20:23:16
● 2026-08-24 01:55:54

●MXin1-smtp.messagingengine.com2026-08-20 → 2026-08-24 · 2 obs

● 2026-08-20 20:23:16
● 2026-08-24 01:55:54

●MXin2-smtp.messagingengine.com2026-08-20 → 2026-08-24 · 2 obs

● 2026-08-20 20:23:16
● 2026-08-24 01:55:54

●A217.21.90.712026-08-20 → 2026-08-24 · 2 obs

● 2026-08-20 20:23:16
● 2026-08-24 01:55:54

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
engineer	v0n0.nic.engineer, v0n1.nic.engineer, v0n2.nic.engineer, v0n3.nic.engineer...	12 records
stackup.engineer	phil.ns.cloudflare.com, amy.ns.cloudflare.com	-

✅ Authoritative Response

Server:172.64.32.101

NS records: phil.ns.cloudflare.com, amy.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for stackup.engineer (unsigned zone)

⏱️ Timing

Total: 628ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`217.21.90.71`
NS	2	`amy.ns.cloudflare.com, phil.ns.cloudflare.com`
MX	2	`in1-smtp.messagingengine.com (pri: 10), in2-smtp.messagingengine.com (pri: 20)`
TXT	2	`mailerlite-domain-verification=645951b54, v=spf1 include:spf.messagingengine.com a`
SOA	1	`amy.ns.cloudflare.com dns.cloudflare.com`

📌 Glue Records Collected

Total: 12

In-bailiwick: 12 (v0n0.nic.engineer, v0n0.nic.engineer, v0n1.nic.engineer...)

Analysis

IP Addresses

stackup.engineer resolves to just one IP address, 217.21.90.71.

Additional host names such as delhiskinhospital.com, cruns.com, staxxasolar.com and sugisri.com share IP numbers with stackup.engineer.

Name Servers

stackup.engineer is served by two delegated name servers, amy.ns.cloudflare.com and phil.ns.cloudflare.com.

stackup.engineer shares its NS records with other domains, for example seeyourimpact.org, brocode.live, sageapa.tips and two others.

stackup.engineer has at least partial name server overlap with other domains, such as 1bloger.cz, zhuk.xyz, freepop3.info and two others.

It is common to see these name servers used together with name servers nolan.ns.cloudflare.com and byron.ns.cloudflare.com.

DNS names with 6 IP addresses:

amy.ns.cloudflare.com carries IP addresses 108.162.192.101, 172.64.32.101 and 173.245.58.101, with 3 other addresses beyond those.

phil.ns.cloudflare.com carries IP addresses 108.162.193.137, 172.64.33.137 and 173.245.59.137, with 3 other addresses beyond those.

Mail Servers

stackup.engineer is served by two mail servers, in1-smtp.messagingengine.com and in2-smtp.messagingengine.com.

Among the domains sharing a mail server setup with stackup.engineer are rallymotoshop.com, atlantictm.xyz, johnfriedmanflowers.com and two others.

DNS names with 8 IP addresses:

in1-smtp.messagingengine.com carries IP addresses 103.168.172.216, 103.168.172.217 and 103.168.172.218, with 5 other addresses beyond those.

Host names that resolve to four IP numbers:

in2-smtp.messagingengine.com has four IP addresses: 202.12.124.216, 202.12.124.217, 202.12.124.218 and 202.12.124.219.

stackup.engineer - robtex.com