fcbu.com - dns.ninja

`fcbu.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3031::6815:4d7b^{🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3031::ac43:cfac^{🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.77.123^{Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.207.172^{🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`justin.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3bbb^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`justin.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c1bb^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`justin.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:21bb^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`justin.ns.cloudflare.com`
		A	108.162.193.187^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`justin.ns.cloudflare.com`
		A	172.64.33.187^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`justin.ns.cloudflare.com`
		A	173.245.59.187^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`justin.ns.cloudflare.com`
NS	`may.ns.cloudflare.com`
		A	2606:4700:50::adf5:3a87^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`may.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c087^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`may.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2087^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`may.ns.cloudflare.com`
		A	108.162.192.135^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`may.ns.cloudflare.com`
		A	172.64.32.135^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`may.ns.cloudflare.com`
		A	173.245.58.135^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`may.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=BeVa6VpENXsbuX04Qevv`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.77.123, 172.67.207.172
		IPv6 hints	2606:4700:3031::6815:4d7b, 2606:4700:3031::ac43:cfac
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=14, name=cloudflare-ech.com
SOA	`justin.ns.cloudflare.com`dns@cloudflare.com serial=2406282074

`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=1785431577

Subdomains

mail02.fcbu.com

mail07.fcbu.com

mail03.fcbu.com

mylife.fcbu.com

mail.fcbu.com

mail01.fcbu.com

mail06.fcbu.com

Same first word

fcbu.info

fcbu.org.tw

fcbu.com

Similar names

ubfc.net

ubfc.fr

ucbf.org

bucf.com

cfbu.cz

bcuf.org

bcfu.com

ufcb.net

cubf.cn

ufcb.com

ucfb.com

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cfub.com

fcub.de

ubcf.com

ubcf.info

bfcu.org

cubf.com

cufb.com

fbuc.co.za

fucb.cn

bufc.net

ucbf.com

bfcu.info

bcuf.com

cfbu.dk

fcub.com

fbcu.com

fbuc.org

cbuf.org

fbuc.de

fbuc.ru

ubcf.ca

bfcu.net

bfuc.org

bufc.com

fubc.net

cbuf.dk

fbcu.org

ufcb.us

cfbu.ca

cbuf.jp

ubcf.org

cbfu.com

fcub.net

fubc.org

cfbu.com

cubf.xyz

bfuc.com

bufc.co.uk

fbuc.com

ufbc.co.nz

ubcf.org.uk

ubfc.com

fbcu.com.br

bcfu.cn

bfcu.com

cbuf.com

cfbu.cn

ufbc.live

fcub.info

bufc.cn

ucfb.de

fubc.ru

ucfb.ac.uk

bufc.co.za

fubc.co.nz

ucfb.net

ucfb.info

fcub.org

bufc.org

fbuc.cn

DNS History

28 records (9 active, 19 former)

○NScoconut.dnspod.net2026-03-28 → 2026-05-29 · 5 obs

○ 2017-07-12 21:07:52
● 2026-03-28 06:58:32
● 2026-05-29 07:10:04
○ 2026-06-11 13:10:50
○ 2026-07-30 17:39:06

○NSconcert.dnspod.net2026-03-28 → 2026-05-29 · 5 obs

○ 2017-07-12 21:07:52
● 2026-03-28 06:58:32
● 2026-05-29 07:10:04
○ 2026-06-11 13:10:50
○ 2026-07-30 17:39:06

○NSf1g1ns1.dnspod.net2015-08-23 → 2017-07-12 · 5 obs

○ 2008-03-18 15:01:06
● 2015-08-23 14:15:44
● 2017-07-12 21:07:52
○ 2026-03-28 06:58:32
○ 2026-07-30 17:39:06

○NSf1g1ns2.dnspod.net2015-08-23 → 2017-07-12 · 5 obs

○ 2008-03-18 15:01:06
● 2015-08-23 14:15:44
● 2017-07-12 21:07:52
○ 2026-03-28 06:58:32
○ 2026-07-30 17:39:06

●NSjustin.ns.cloudflare.com2026-06-11 → 2026-07-30 · 3 obs

○ 2026-05-29 07:10:04
● 2026-06-11 13:10:50
● 2026-07-30 17:39:06

●NSmay.ns.cloudflare.com2026-06-11 → 2026-07-30 · 3 obs

○ 2026-05-29 07:10:04
● 2026-06-11 13:10:50
● 2026-07-30 17:39:06

○MXalt1.aspmx.l.google.com2015-08-23 → 2017-07-12 · 5 obs

○ 2008-03-18 15:01:06
● 2015-08-23 14:15:44
● 2017-07-12 21:07:52
○ 2026-03-28 06:58:32
○ 2026-07-30 17:39:06

○MXalt2.aspmx.l.google.com2015-08-23 → 2017-07-12 · 5 obs

○ 2008-03-18 15:01:06
● 2015-08-23 14:15:44
● 2017-07-12 21:07:52
○ 2026-03-28 06:58:32
○ 2026-07-30 17:39:06

○MXaspmx.l.google.com2015-08-23 → 2017-07-12 · 5 obs

○ 2008-03-18 15:01:06
● 2015-08-23 14:15:44
● 2017-07-12 21:07:52
○ 2026-03-28 06:58:32
○ 2026-07-30 17:39:06

○MXaspmx2.googlemail.com2015-08-23 → 2017-07-12 · 5 obs

○ 2008-03-18 15:01:06
● 2015-08-23 14:15:44
● 2017-07-12 21:07:52
○ 2026-03-28 06:58:32
○ 2026-07-30 17:39:06

○MXaspmx3.googlemail.com2015-08-23 → 2017-07-12 · 5 obs

○ 2008-03-18 15:01:06
● 2015-08-23 14:15:44
● 2017-07-12 21:07:52
○ 2026-03-28 06:58:32
○ 2026-07-30 17:39:06

○MXaspmx4.googlemail.com2015-08-23 → 2017-07-12 · 5 obs

○ 2008-03-18 15:01:06
● 2015-08-23 14:15:44
● 2017-07-12 21:07:52
○ 2026-03-28 06:58:32
○ 2026-07-30 17:39:06

○MXaspmx5.googlemail.com2015-08-23 → 2017-07-12 · 5 obs

○ 2008-03-18 15:01:06
● 2015-08-23 14:15:44
● 2017-07-12 21:07:52
○ 2026-03-28 06:58:32
○ 2026-07-30 17:39:06

●MXmx1.larksuite.com2026-03-28 → 2026-07-30 · 3 obs

○ 2017-07-12 21:07:52
● 2026-03-28 06:58:32
● 2026-07-30 17:39:06

●MXmx2.larksuite.com2026-03-28 → 2026-07-30 · 3 obs

○ 2017-07-12 21:07:52
● 2026-03-28 06:58:32
● 2026-07-30 17:39:06

●MXmx3.larksuite.com2026-03-28 → 2026-07-30 · 3 obs

○ 2017-07-12 21:07:52
● 2026-03-28 06:58:32
● 2026-07-30 17:39:06

●A104.21.77.1232026-06-11 → 2026-07-30 · 3 obs

○ 2026-05-29 07:10:04
● 2026-06-11 13:10:50
● 2026-07-30 17:39:06

○A118.24.8.682026-03-28 → 2026-05-29 · 5 obs

○ 2017-07-12 21:07:52
● 2026-03-28 06:58:32
● 2026-05-29 07:10:04
○ 2026-06-11 13:10:50
○ 2026-07-30 17:39:06

○A138.68.22.1252017-07-12 → 2017-07-12 · 4 obs

○ 2016-10-08 18:10:54
● 2017-07-12 21:07:52
○ 2026-03-28 06:58:32
○ 2026-07-30 17:39:06

○A162.243.140.982015-08-23 → 2016-03-28 · 5 obs

○ 2008-03-18 15:01:06
● 2015-08-23 14:15:44
● 2016-03-28 03:16:08
○ 2016-06-06 16:18:22
○ 2026-07-30 17:39:06

●A172.67.207.1722026-06-11 → 2026-07-30 · 3 obs

○ 2026-05-29 07:10:04
● 2026-06-11 13:10:50
● 2026-07-30 17:39:06

○A204.44.102.2042016-06-06 → 2016-10-08 · 5 obs

○ 2016-03-28 03:16:08
● 2016-06-06 16:18:22
● 2016-10-08 18:10:54
○ 2017-07-12 21:07:52
○ 2026-07-30 17:39:06

●A2606:4700:3031::6815:4d7b2026-06-19 → 2026-07-30 · 3 obs

○ 2026-06-12 17:00:56
● 2026-06-19 15:45:18
● 2026-07-30 17:39:06

●A2606:4700:3031::ac43:cfac2026-06-19 → 2026-07-30 · 3 obs

○ 2026-06-12 17:00:56
● 2026-06-19 15:45:18
● 2026-07-30 17:39:06

○A2606:4700:3036::6815:4d7b2026-06-11 → 2026-06-12 · 5 obs

○ 2026-05-29 07:10:04
● 2026-06-11 13:10:50
● 2026-06-12 17:00:56
○ 2026-06-19 15:45:18
○ 2026-07-30 17:39:06

○A2606:4700:3036::ac43:cfac2026-06-11 → 2026-06-12 · 5 obs

○ 2026-05-29 07:10:04
● 2026-06-11 13:10:50
● 2026-06-12 17:00:56
○ 2026-06-19 15:45:18
○ 2026-07-30 17:39:06

○A59.36.99.2022008-03-18 → 2008-03-18 · 3 obs

● 2008-03-18 15:01:06
○ 2015-08-23 14:15:44
○ 2026-07-30 17:39:06

○CNAMEcdna2.ptent.org2015-08-23 → 2016-03-28 · 5 obs

○ 2008-03-18 15:01:06
● 2015-08-23 14:15:44
● 2016-03-28 03:16:08
○ 2016-06-06 16:18:22
○ 2026-07-30 17:39:06

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, e.gtld-servers.net, j.gtld-servers.net, b.gtld-servers.net...	-
fcbu.com	may.ns.cloudflare.com, justin.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.193.187

NS records: may.ns.cloudflare.com, justin.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for fcbu.com (unsigned zone)

⏱️ Timing

Total: 175ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.207.172, 104.21.77.123`
AAAA	2	`2606:4700:3031::6815:4d7b, 2606:4700:3031::ac43:cfac`
NS	2	`justin.ns.cloudflare.com, may.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=BeVa6VpE`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`justin.ns.cloudflare.com dns.cloudflare.`

📌 Glue Records Collected

Total: 12

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

Analysis

Hierarchy

The host names mail02.fcbu.com, mail07.fcbu.com, mail03.fcbu.com, mylife.fcbu.com and mail.fcbu.com — among a few others — fall under the parent domain fcbu.com.

IP Addresses

fcbu.com directs to four IP numbers, which are 104.21.77.123, 172.67.207.172, 2606:4700:3031::6815:4d7b and 2606:4700:3031::ac43:cfac.

Two other host names, along with www.glavronetpk.click, nessziona.net and bouwentuinwerkdeventer.nl, also share IP numbers with fcbu.com.

Name Servers

fcbu.com is delegated to two name servers: justin.ns.cloudflare.com and may.ns.cloudflare.com.

fcbu.com shares its NS records with other domains, for example qnsabh.cc, sixthstory.co.uk, gojira.net and two others.

At least some of fcbu.com's name servers are shared with other domains, for example kdbooks.ca, impactingorj.ro, romiosini.org.gr and two more.

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

DNS names with 6 IP addresses:

justin.ns.cloudflare.com resolves to 108.162.193.187, 172.64.33.187, 173.245.59.187 and 3 other IP addresses.

may.ns.cloudflare.com resolves to 108.162.192.135, 172.64.32.135, 173.245.58.135 and 3 other IP addresses.

Mail Servers

The MX records for fcbu.com list three mail servers: mx1.larksuite.com, mx2.larksuite.com and mx3.larksuite.com.

There is at least a partial MX overlap between fcbu.com and other domains, including kconceptvn.com, microcrew.ai, charmchums.com and two others.

Hostnames that map to three IP numbers:

mx3.larksuite.com points 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 points to 18.139.153.173.

mx2.larksuite.com points to 18.139.153.173.

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