`firstclassbuilders.us`

DNSSEC	⚠️ Not signed
A	2606:4700:3032::ac43:85cc^{🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3035::6815:5c5^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.5.197^{Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.133.204^{🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`hans.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3baf^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`hans.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c1af^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`hans.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:21af^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`hans.ns.cloudflare.com`
		A	108.162.193.175^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`hans.ns.cloudflare.com`
		A	172.64.33.175^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`hans.ns.cloudflare.com`
		A	173.245.59.175^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`hans.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`
MX	`mail.strony123.com` ⭐
		A	45.32.73.106^{🇺🇸 AS-VULTR45.32.64.0/19 Vultr Assigned Prefix}
			PTR	`mail.strony123.com`
TXT	`v=spf1 +a +mx +ip4:69.195.124.163 include:bluehost.com ip4:162.144.121.198 ?all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.5.197, 172.67.133.204
		IPv6 hints	2606:4700:3032::ac43:85cc, 2606:4700:3035::6815:5c5
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=40, name=cloudflare-ech.com
SOA	`hans.ns.cloudflare.com`dns@cloudflare.com serial=2402619222

`us`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.cctld.us` ⭐
	NS	`b.cctld.us`
	NS	`f.cctld.us`
	NS	`k.cctld.us`
	NS	`m.cctld.us`
	NS	`n.cctld.us`
	NS	`w.cctld.us`
	NS	`x.cctld.us`
	NS	`y.cctld.us`
	SOA	`a.cctld.us`admin@tldns.godaddy serial=1778903848

Previously MX for

firstclassbuilders.us

Same first word

firstclassbuilders.us

firstclassbuilders.info

DNS History

12 records (7 active, 5 former)

●NShans.ns.cloudflare.com2026-05-06 → 2026-05-16 · 3 obs

○ 2018-01-02 02:05:08
● 2026-05-06 08:48:00
● 2026-05-16 04:18:40

○NSns1.bluehost.com2015-05-13 → 2018-01-02 · 4 obs

● 2015-05-13 05:33:44
● 2018-01-02 02:05:08
○ 2026-05-06 08:48:00
○ 2026-05-16 04:18:40

○NSns2.bluehost.com2015-05-13 → 2018-01-02 · 4 obs

● 2015-05-13 05:33:44
● 2018-01-02 02:05:08
○ 2026-05-06 08:48:00
○ 2026-05-16 04:18:40

●NSrachel.ns.cloudflare.com2026-05-06 → 2026-05-16 · 3 obs

○ 2018-01-02 02:05:08
● 2026-05-06 08:48:00
● 2026-05-16 04:18:40

○MXfirstclassbuilders.us2015-05-13 → 2018-01-02 · 4 obs

● 2015-05-13 05:33:44
● 2018-01-02 02:05:08
○ 2026-05-06 08:48:00
○ 2026-05-16 04:18:40

●MXmail.strony123.com2026-05-06 → 2026-05-16 · 3 obs

○ 2018-01-02 02:05:08
● 2026-05-06 08:48:00
● 2026-05-16 04:18:40

●A104.21.5.1972026-05-06 → 2026-05-16 · 3 obs

○ 2018-01-02 02:05:08
● 2026-05-06 08:48:00
● 2026-05-16 04:18:40

○A162.144.179.2192018-01-02 → 2018-01-02 · 4 obs

○ 2016-09-23 08:35:12
● 2018-01-02 02:05:08
○ 2026-05-06 08:48:00
○ 2026-05-16 04:18:40

●A172.67.133.2042026-05-06 → 2026-05-16 · 3 obs

○ 2018-01-02 02:05:08
● 2026-05-06 08:48:00
● 2026-05-16 04:18:40

●A2606:4700:3032::ac43:85cc2026-05-06 → 2026-05-16 · 3 obs

○ 2018-01-02 02:05:08
● 2026-05-06 08:48:00
● 2026-05-16 04:18:40

●A2606:4700:3035::6815:5c52026-05-06 → 2026-05-16 · 3 obs

○ 2018-01-02 02:05:08
● 2026-05-06 08:48:00
● 2026-05-16 04:18:40

○A50.87.197.1642015-05-13 → 2016-09-23 · 4 obs

● 2015-05-13 05:33:44
● 2016-09-23 08:35:12
○ 2018-01-02 02:05:08
○ 2026-05-16 04:18:40

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
us	b.cctld.us, f.cctld.us, k.cctld.us, m.cctld.us...	-
firstclassbuilders.us	rachel.ns.cloudflare.com, hans.ns.cloudflare.com	-

✅ Authoritative Response

Server:173.245.58.215

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for firstclassbuilders.us (unsigned zone)

⏱️ Timing

Total: 611ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.5.197, 172.67.133.204`
AAAA	2	`2606:4700:3032::ac43:85cc, 2606:4700:3035::6815:5c5`
NS	2	`hans.ns.cloudflare.com, rachel.ns.cloudflare.com`
MX	1	`mail.strony123.com (pri: 0)`
TXT	1	`v=spf1 +a +mx +ip4:69.195.124.163 includ`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`hans.ns.cloudflare.com dns.cloudflare.co`

Analysis

IP Addresses

firstclassbuilders.us maps to four IP numbers: 2606:4700:3032::ac43:85cc, 2606:4700:3035::6815:5c5, 104.21.5.197 and 172.67.133.204.

other host names include www.toolovaitalia.com, chilepokertour2011.com, peteearley.com, mail.saliji.de and webmastermalaysia.com; they share IP numbers with firstclassbuilders.us.

Name Servers

Two name servers hans.ns.cloudflare.com and rachel.ns.cloudflare.com handle the delegation for firstclassbuilders.us.

firstclassbuilders.us shares the same name server setup as other domains, for instance ddinteriordemolitionchicago.com, wmmasonry.com, fattach.com, propertymedicsinc.com and barringtoncomputer.com.

firstclassbuilders.us at least partially shares name servers with other domains, for instance nextplayarena81.us, goldenpokeronline.com, ariesfacilityservices.com, amoryfortaleza.org and fe7l0focyik-f10j.top.

These name servers are commonly used alongside brenda.ns.cloudflare.com.

Six IP addresses per host:

hans.ns.cloudflare.com points to 2606:4700:58::adf5:3baf, 2803:f800:50::6ca2:c1af, 2a06:98c1:50::ac40:21af, 108.162.193.175, 172.64.33.175 and 173.245.59.175; rachel.ns.cloudflare.com points to 2606:4700:50::adf5:3ad7, 2803:f800:50::6ca2:c0d7, 2a06:98c1:50::ac40:20d7, 108.162.192.215, 172.64.32.215 and 173.245.58.215

Mail Servers

firstclassbuilders.us is handled by a single mail server, mail.strony123.com.

firstclassbuilders.us uses the same mail server setup as other domains, for instance barringtoncomputer.com, loanlink.co.uk, solidchoiceconstruction.com, bespokestaircaselondon.co.uk and sites123.us.

firstclassbuilders.us shares at least some mail servers with other domains, for instance tiledecorinc.com.

The host name mail.strony123.com points to IP 45.32.73.106.

firstclassbuilders.us - robtex.com