`ztbsys.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3031::6815:1337^{🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3037::ac43:b943^{🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.19.55^{Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.185.67^{🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`clyde.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b5b^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`clyde.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c15b^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`clyde.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:215b^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`clyde.ns.cloudflare.com`
		A	108.162.193.91^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`clyde.ns.cloudflare.com`
		A	172.64.33.91^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`clyde.ns.cloudflare.com`
		A	173.245.59.91^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`clyde.ns.cloudflare.com`
NS	`summer.ns.cloudflare.com`
		A	2606:4700:50::a29f:2609^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`summer.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c209^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`summer.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2209^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`summer.ns.cloudflare.com`
		A	108.162.194.9^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`summer.ns.cloudflare.com`
		A	162.159.38.9^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`summer.ns.cloudflare.com`
		A	172.64.34.9^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`summer.ns.cloudflare.com`
MX	`mx1.larksuite.com` ⭐
		A	18.139.153.173^{🇸🇬 Amazon18.138.0.0/15 EC2 SIN prefix}
			PTR	`ec2-18-139-153-173.ap-southeast-1.compute.amazonaws.com`
MX	`mx2.larksuite.com`⁽⁵⁾
		A	18.139.153.173^{🇸🇬 Amazon18.138.0.0/15 EC2 SIN prefix}
			PTR	`ec2-18-139-153-173.ap-southeast-1.compute.amazonaws.com`
MX	`mx3.larksuite.com`⁽¹⁰⁾
		A	18.139.153.173^{🇸🇬 Amazon18.138.0.0/15 EC2 SIN prefix}
			PTR	`ec2-18-139-153-173.ap-southeast-1.compute.amazonaws.com`
		A	101.126.58.223^{🇨🇳 VOLCANO-ENGINE101.126.56.0/21 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
		A	122.14.230.154^{🇨🇳 CHINAMOBILE-CN122.14.224.0/20}
TXT	`v=spf1 +include:spf.onlarksuite.com -all`
TXT	`verification-code-site-App_lark=BJYhBRHaKdSVgMvQT88m`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.19.55, 172.67.185.67
		IPv6 hints	2606:4700:3031::6815:1337, 2606:4700:3037::ac43:b943
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=213, name=cloudflare-ech.com
SOA	`clyde.ns.cloudflare.com`dns@cloudflare.com serial=2411143132

`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=1785697857

Subdomains

clevai.ztbsys.com

s3.ztbsys.com

Same first word

ztbsys.com

Similar names

stzsby.com

zstysb.com

tssybz.com

szstyb.com

bstzsy.com

szytbs.com

szybst.com

szbyst.com

sbstyz.com

yzsbst.com

sztsby.com

sbstzy.com

sytzsb.com

tsyzsb.com

stysbz.com

szbtsy.com

DNS History

11 records (9 active, 2 former)

●NSclyde.ns.cloudflare.com2026-05-24 → 2026-08-02 · 2 obs

● 2026-05-24 03:57:22
● 2026-08-02 19:40:24

●NSsummer.ns.cloudflare.com2026-05-24 → 2026-08-02 · 2 obs

● 2026-05-24 03:57:22
● 2026-08-02 19:40:24

●MXmx1.larksuite.com2026-05-24 → 2026-08-02 · 2 obs

● 2026-05-24 03:57:22
● 2026-08-02 19:40:24

●MXmx2.larksuite.com2026-05-24 → 2026-08-02 · 2 obs

● 2026-05-24 03:57:22
● 2026-08-02 19:40:24

●MXmx3.larksuite.com2026-05-24 → 2026-08-02 · 2 obs

● 2026-05-24 03:57:22
● 2026-08-02 19:40:24

●A104.21.19.552026-05-24 → 2026-08-02 · 2 obs

● 2026-05-24 03:57:22
● 2026-08-02 19:40:24

●A172.67.185.672026-05-24 → 2026-08-02 · 2 obs

● 2026-05-24 03:57:22
● 2026-08-02 19:40:24

●A2606:4700:3031::6815:13372026-07-08 → 2026-08-02 · 3 obs

○ 2026-06-02 12:16:50
● 2026-07-08 21:56:34
● 2026-08-02 19:40:24

○A2606:4700:3036::ac43:b9432026-05-24 → 2026-06-02 · 4 obs

● 2026-05-24 03:57:22
● 2026-06-02 12:16:50
○ 2026-07-08 21:56:34
○ 2026-08-02 19:40:24

○A2606:4700:3037::6815:13372026-05-24 → 2026-06-02 · 4 obs

● 2026-05-24 03:57:22
● 2026-06-02 12:16:50
○ 2026-07-08 21:56:34
○ 2026-08-02 19:40:24

●A2606:4700:3037::ac43:b9432026-07-08 → 2026-08-02 · 3 obs

○ 2026-06-02 12:16:50
● 2026-07-08 21:56:34
● 2026-08-02 19:40:24

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
ztbsys.com	clyde.ns.cloudflare.com, summer.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.194.9

NS records: clyde.ns.cloudflare.com, summer.ns.cloudflare.com

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 137ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.185.67, 104.21.19.55`
AAAA	2	`2606:4700:3037::ac43:b943, 2606:4700:3031::6815:1337`
NS	2	`clyde.ns.cloudflare.com, summer.ns.cloudflare.com`
MX	3	`mx1.larksuite.com (pri: 1), mx3.larksuite.com (pri: 10)...`
TXT	2	`v=spf1 +include:spf.onlarksuite.com -all, verification-code-site-App_lark=BJYhBRHa`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`clyde.ns.cloudflare.com dns.cloudflare.c`

📌 Glue Records Collected

Total: 12

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

Analysis

Hierarchy

clevai.ztbsys.com and s3.ztbsys.com each fall under ztbsys.com as their parent domain.

IP Addresses

ztbsys.com has four IP addresses: 104.21.19.55, 172.67.185.67, 2606:4700:3031::6815:1337 and 2606:4700:3037::ac43:b943.

Two other host names, along with www.narsisdigitalprinting.com, asingularcreation.com and widgetmaker.co.uk, also share IP numbers with ztbsys.com.

Name Servers

ztbsys.com uses two name servers for its delegation: clyde.ns.cloudflare.com and summer.ns.cloudflare.com.

ztbsys.com shares its NS records with other domains, for example playfiteducation.com, madstreetden.xyz, getblox.ai and two others.

ztbsys.com has at least partial name server overlap with other domains, such as (0x7868616d73746572)41.desi, 556682a.cc, group24bright.forum and two others.

michael.ns.cloudflare.com, eoin.ns.cloudflare.com and elle.ns.cloudflare.com — plus 4 other name servers — are commonly paired with these name servers.

DNS names with 6 IP addresses:

Hostname clyde.ns.cloudflare.com directs to 108.162.193.91, 172.64.33.91 and 173.245.59.91 along with 3 other IP addresses.

Hostname summer.ns.cloudflare.com directs to 108.162.194.9, 162.159.38.9 and 172.64.34.9 along with 3 other IP addresses.

Mail Servers

ztbsys.com has three mail servers: mx1.larksuite.com, mx2.larksuite.com and mx3.larksuite.com.

There is at least a partial MX overlap between ztbsys.com and other domains, including anta6.com, know-link.com, autominutes.ai and two others.

Hostnames that map to three IP numbers:

The hostname mx3.larksuite.com directs to 18.139.153.173, 101.126.58.223 and 122.14.230.154.

Host names that point to one IP address:

mx1.larksuite.com has the IP address 18.139.153.173.

mx2.larksuite.com has the IP address 18.139.153.173.

Each of mx3.larksuite.com, mx1.larksuite.com and mx2.larksuite.com resolves to 18.139.153.173.

ztbsys.com - robtex.com

ztbsys.com

com

Subdomains

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

📌 Glue Records Collected

Analysis

Hierarchy

IP Addresses

Name Servers

Mail Servers

`ztbsys.com`

`com`