stackup.co - dns.ninja

`stackup.co`

DNSSEC	⚠️ Not signed
A	2606:4700:3032::ac43:baa4^{🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3037::6815:3c05^{🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.60.5^{Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.186.164^{🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`elsa.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3a6f^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`elsa.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c06f^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`elsa.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:206f^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`elsa.ns.cloudflare.com`
		A	108.162.192.111^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`elsa.ns.cloudflare.com`
		A	172.64.32.111^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`elsa.ns.cloudflare.com`
		A	173.245.58.111^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`elsa.ns.cloudflare.com`
NS	`greg.ns.cloudflare.com`
		A	2606:4700:58::adf5:3b73^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`greg.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c173^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`greg.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2173^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`greg.ns.cloudflare.com`
		A	108.162.193.115^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`greg.ns.cloudflare.com`
		A	172.64.33.115^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`greg.ns.cloudflare.com`
		A	173.245.59.115^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`greg.ns.cloudflare.com`
MX	`aspmx.l.google.com` ⭐
		A	2607:f8b0:4004:c23::1a^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`yuiadrs-in-f26.1e100.net`
		A	142.251.163.26^{🇺🇸 Google142.251.163.0/24}
			PTR	`wv-in-f26.1e100.net`
MX	`alt1.aspmx.l.google.com`⁽⁵⁾
		A	2800:3f0:4003:c0f::1a^{🇨🇱 Google2800:3f0:4003::/48}
		A	108.177.123.26^{🇺🇸 Google108.177.123.0/24}
			PTR	`lcscld-in-f26.1e100.net`
MX	`alt2.aspmx.l.google.com`⁽⁵⁾
		A	2a00:1450:400b:c02::1b^{🇮🇪 Google2a00:1450:400b::/48}
			PTR	`dj-in-f27.1e100.net`
		A	172.253.116.26^{🇺🇸 Google172.253.116.0/24}
			PTR	`dj-in-f26.1e100.net`
MX	`alt3.aspmx.l.google.com`⁽¹⁰⁾
		A	2a00:1450:4009:c0f::1a^{🇬🇧 Google2a00:1450:4009::/48}
			PTR	`yulhrs-in-f26.1e100.net`
		A	192.178.223.27^{🇺🇸 Google192.178.223.0/24}
			PTR	`yulhrs-in-f27.1e100.net`
MX	`alt4.aspmx.l.google.com`⁽¹⁰⁾
		A	2a00:1450:400c:c23::1a^{🇧🇪 Google2a00:1450:400c::/48}
			PTR	`yubrupd-in-f26.1e100.net`
		A	172.253.157.27^{🇺🇸 Google172.253.0.0/16}
			PTR	`yubrupd-in-f27.1e100.net`
TXT	`google-site-verification=uzsY9TQkqmoD0USZEzmSOzSw_bf7ewz1XjZfR74Crik`
TXT	`v=spf1 include:_spf.google.com -all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.60.5, 172.67.186.164
		IPv6 hints	2606:4700:3032::ac43:baa4, 2606:4700:3037::6815:3c05
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=170, name=cloudflare-ech.com
SOA	`elsa.ns.cloudflare.com`dns@cloudflare.com serial=2406575241

`co`

	DNSSEC	🔒 Signed (DS record present)
	NS	`ns0.centralnic.net` ⭐
	NS	`a.registrydns.co`
	NS	`b.registrydns.co`
	NS	`c.registrydns.co`
	NS	`d.registrydns.co`
	SOA	`ns0.centralnic.net`hostmaster@centralnic.net serial=1759681650

Same first word

stackup.com

stackup.io

stackup.dev

stackup.co

stackup.co.uk

stackup.fi

stackup.sh

stackup.expert

stackup.com.au

stackup.cn

stackup.it

stackup.tech

stackup.ca

stackup.ai

stackup.guru

stackup.net

stackup.education

stackup.org

stackup.finance

Similar names

tupacks.com

cuptask.com

upstack.co

skatcup.com

upstack.com

kutaspc.com

upstack.io

utpacks.com

taskcup.com

upstack.net

pustack.com

DNS History

16 records (11 active, 5 former)

●NSelsa.ns.cloudflare.com2026-03-27 → 2026-06-13 · 3 obs

○ 2017-05-23 07:00:00
● 2026-03-27 23:20:40
● 2026-06-13 23:55:02

●NSgreg.ns.cloudflare.com2026-03-27 → 2026-06-13 · 3 obs

○ 2017-05-23 07:00:00
● 2026-03-27 23:20:40
● 2026-06-13 23:55:02

○NSns.phx1.nearlyfreespeech.net2015-06-16 → 2017-05-23 · 4 obs

● 2015-06-16 00:19:48
● 2017-05-23 07:00:00
○ 2026-03-27 23:20:40
○ 2026-06-13 23:55:02

○NSns.phx2.nearlyfreespeech.net2015-06-16 → 2017-05-23 · 4 obs

● 2015-06-16 00:19:48
● 2017-05-23 07:00:00
○ 2026-03-27 23:20:40
○ 2026-06-13 23:55:02

○NSns.phx5.nearlyfreespeech.net2015-06-16 → 2017-05-23 · 4 obs

● 2015-06-16 00:19:48
● 2017-05-23 07:00:00
○ 2026-03-27 23:20:40
○ 2026-06-13 23:55:02

●MXalt1.aspmx.l.google.com2026-03-27 → 2026-06-13 · 3 obs

○ 2017-05-23 07:00:00
● 2026-03-27 23:20:40
● 2026-06-13 23:55:02

●MXalt2.aspmx.l.google.com2026-03-27 → 2026-06-13 · 3 obs

○ 2017-05-23 07:00:00
● 2026-03-27 23:20:40
● 2026-06-13 23:55:02

●MXalt3.aspmx.l.google.com2026-03-27 → 2026-06-13 · 3 obs

○ 2017-05-23 07:00:00
● 2026-03-27 23:20:40
● 2026-06-13 23:55:02

●MXalt4.aspmx.l.google.com2026-03-27 → 2026-06-13 · 3 obs

○ 2017-05-23 07:00:00
● 2026-03-27 23:20:40
● 2026-06-13 23:55:02

●MXaspmx.l.google.com2026-03-27 → 2026-06-13 · 3 obs

○ 2017-05-23 07:00:00
● 2026-03-27 23:20:40
● 2026-06-13 23:55:02

○MXmx-fwd-1.nearlyfreespeech.net2015-06-16 → 2017-05-23 · 4 obs

● 2015-06-16 00:19:48
● 2017-05-23 07:00:00
○ 2026-03-27 23:20:40
○ 2026-06-13 23:55:02

●A104.21.60.52026-03-27 → 2026-06-13 · 3 obs

○ 2017-05-23 07:00:00
● 2026-03-27 23:20:40
● 2026-06-13 23:55:02

●A172.67.186.1642026-03-27 → 2026-06-13 · 3 obs

○ 2017-05-23 07:00:00
● 2026-03-27 23:20:40
● 2026-06-13 23:55:02

○A208.94.117.2152015-06-16 → 2017-05-23 · 4 obs

● 2015-06-16 00:19:48
● 2017-05-23 07:00:00
○ 2026-03-27 23:20:40
○ 2026-06-13 23:55:02

●A2606:4700:3032::ac43:baa42026-03-27 → 2026-06-13 · 3 obs

○ 2017-05-23 07:00:00
● 2026-03-27 23:20:40
● 2026-06-13 23:55:02

●A2606:4700:3037::6815:3c052026-03-27 → 2026-06-13 · 3 obs

○ 2017-05-23 07:00:00
● 2026-03-27 23:20:40
● 2026-06-13 23:55:02

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
co	a.registrydns.co, b.registrydns.co, c.registrydns.co, d.registrydns.co	-
stackup.co	greg.ns.cloudflare.com, elsa.ns.cloudflare.com	-

✅ Authoritative Response

Server:173.245.59.115

NS records: greg.ns.cloudflare.com, elsa.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for stackup.co (unsigned zone)

⏱️ Timing

Total: 710ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.60.5, 172.67.186.164`
AAAA	2	`2606:4700:3037::6815:3c05, 2606:4700:3032::ac43:baa4`
NS	2	`elsa.ns.cloudflare.com, greg.ns.cloudflare.com`
MX	5	`aspmx.l.google.com (pri: 1), alt3.aspmx.l.google.com (pri: 10)...`
TXT	2	`google-site-verification=uzsY9TQkqmoD0US, v=spf1 include:_spf.google.com -all`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`elsa.ns.cloudflare.com dns.cloudflare.co`

Analysis

IP Addresses

stackup.co points to four IP numbers: 104.21.60.5, 172.67.186.164, 2606:4700:3032::ac43:baa4 and 2606:4700:3037::6815:3c05.

dreamboatclub.com, godslog.com, estapryal.ee plus two other host names have IP numbers in common with stackup.co.

Name Servers

stackup.co is served by two delegated name servers, elsa.ns.cloudflare.com and greg.ns.cloudflare.com.

The name server configuration of stackup.co is shared with other domains, for instance trafficformula2.com, danikdeals.com, tiempoperdido.net and two others.

At least some of stackup.co's name servers are shared with other domains, for example alexpublishing.com, pmnewell.com, willcliffe.com and two more.

These name servers tend to be used in conjunction with the name servers adaline.ns.cloudflare.com.

Hosts with 6 IP addresses each:

elsa.ns.cloudflare.com carries IP addresses 108.162.192.111, 172.64.32.111 and 173.245.58.111, with 3 other addresses beyond those.

greg.ns.cloudflare.com carries IP addresses 108.162.193.115, 172.64.33.115 and 173.245.59.115, with 3 other addresses beyond those.

Mail Servers

stackup.co has five mail servers, which are aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com and two others.

At least some of the mail servers used by stackup.co are shared with other domains: lexcom.fr, norcalrealsolutions.com, ns500768.ns500759.ns500698.ns500736.ns500736.ns500698.ns500698.ns500708.ns500698.ns500576.ns500708.ns500576.ns500576.ns500652.trackreceptor.com and two others among them.

It is common to find these mail servers paired with the mail servers alt3.aspmx.l.google.com, alt4.aspmx.l.google.com and aspmx2.googlemail.com, as well as two others.

Host names pointing to two IP addresses:

aspmx.l.google.com maps to two IP addresses — 142.251.163.26 and 2607:f8b0:4004:c23::1a.

alt1.aspmx.l.google.com maps to two IP addresses — 108.177.123.26 and 2800:3f0:4003:c0f::1a.

alt2.aspmx.l.google.com maps to two IP addresses — 172.253.116.26 and 2a00:1450:400b:c02::1b.

alt3.aspmx.l.google.com maps to two IP addresses — 192.178.223.27 and 2a00:1450:4009:c0f::1a.

alt4.aspmx.l.google.com maps to two IP addresses — 172.253.157.27 and 2a00:1450:400c:c23::1a.