firstclassbuild.com - dns.ninja

`firstclassbuild.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3033::6815:5bab^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3036::ac43:afd0^{🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.91.171^{Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.175.208^{🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`armando.ns.cloudflare.com` ⭐
		A	2606:4700:58::a29f:2ce1^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`armando.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c3e1^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`armando.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:23e1^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`armando.ns.cloudflare.com`
		A	108.162.195.225^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`armando.ns.cloudflare.com`
		A	162.159.44.225^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`armando.ns.cloudflare.com`
		A	172.64.35.225^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`armando.ns.cloudflare.com`
NS	`zelda.ns.cloudflare.com`
		A	2606:4700:50::adf5:3af2^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`zelda.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c0f2^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`zelda.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:20f2^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`zelda.ns.cloudflare.com`
		A	108.162.192.242^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`zelda.ns.cloudflare.com`
		A	172.64.32.242^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`zelda.ns.cloudflare.com`
		A	173.245.58.242^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`zelda.ns.cloudflare.com`
MX	`smtp.google.com` ⭐
		A	2607:f8b0:4004:c1b::1a^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`wv-in-f26.1e100.net`
		A	2607:f8b0:4004:c29::1a^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`yuiadum-in-f26.1e100.net`
		A	2607:f8b0:4004:c29::1b^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`yuiadum-in-f27.1e100.net`
		A	2607:f8b0:4004:c2d::1a^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`ry-in-f26.1e100.net`
		A	142.251.163.26^{🇺🇸 Google142.251.163.0/24}
			PTR	`wv-in-f26.1e100.net`
		A	142.251.163.27^{🇺🇸 Google142.251.163.0/24}
			PTR	`wv-in-f27.1e100.net`
		A	173.194.45.26^{🇺🇸 Google173.194.0.0/16}
			PTR	`yuiadum-in-f26.1e100.net`
		A	173.194.45.27^{🇺🇸 Google173.194.0.0/16}
			PTR	`yuiadum-in-f27.1e100.net`
		A	192.179.18.26^{🇺🇸 Google192.178.0.0/15}
			PTR	`ry-in-f26.1e100.net`
MX	`aspmx.l.google.com`⁽⁵⁾
		A	2607:f8b0:4004:c1b::1b^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`wv-in-f27.1e100.net`
		A	173.194.45.26^{🇺🇸 Google173.194.0.0/16}
			PTR	`yuiadum-in-f26.1e100.net`
MX	`alt1.aspmx.l.google.com`⁽¹⁰⁾
		A	2800:3f0:4003:c0f::1b^{🇨🇱 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`⁽¹⁰⁾
		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`⁽²⁰⁾
		A	2a00:1450:4009:c0f::1a^{🇬🇧 Google2a00:1450:4009::/48}
			PTR	`yulhrs-in-f26.1e100.net`
		A	192.178.223.26^{🇺🇸 Google192.178.223.0/24}
			PTR	`yulhrs-in-f26.1e100.net`
MX	`alt4.aspmx.l.google.com`⁽²⁰⁾
		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=PmrVR3cks2mckrlIkuf0yseb5LiJqj3_76EVzBlwT7w`
TXT	`v=spf1 include:_spf.google.com ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.91.171, 172.67.175.208
		IPv6 hints	2606:4700:3033::6815:5bab, 2606:4700:3036::ac43:afd0
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=54, name=cloudflare-ech.com
SOA	`armando.ns.cloudflare.com`dns@cloudflare.com serial=2410225020

`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=1785344707

Same first word

firstclassbuild.com

DNS History

31 records (12 active, 19 former)

●NSarmando.ns.cloudflare.com2026-04-09 → 2026-07-29 · 3 obs

○ 2026-03-25 14:19:16
● 2026-04-09 12:03:16
● 2026-07-29 17:34:54

○NScuritiba.ns.porkbun.com2026-02-18 → 2026-03-25 · 5 obs

○ 2018-08-29 12:47:38
● 2026-02-18 07:04:38
● 2026-03-25 14:19:16
○ 2026-04-09 12:03:16
○ 2026-07-29 17:34:54

○NSfortaleza.ns.porkbun.com2026-02-18 → 2026-03-25 · 5 obs

○ 2018-08-29 12:47:38
● 2026-02-18 07:04:38
● 2026-03-25 14:19:16
○ 2026-04-09 12:03:16
○ 2026-07-29 17:34:54

○NSmaceio.ns.porkbun.com2026-02-18 → 2026-03-25 · 5 obs

○ 2018-08-29 12:47:38
● 2026-02-18 07:04:38
● 2026-03-25 14:19:16
○ 2026-04-09 12:03:16
○ 2026-07-29 17:34:54

○NSns-uk.1and1-dns.biz2015-11-24 → 2016-12-02 · 4 obs

● 2015-11-24 23:30:56
● 2016-12-02 14:08:38
○ 2018-08-29 12:47:38
○ 2026-07-29 17:34:54

○NSns-uk.1and1-dns.co.uk2015-11-24 → 2016-12-02 · 4 obs

● 2015-11-24 23:30:56
● 2016-12-02 14:08:38
○ 2018-08-29 12:47:38
○ 2026-07-29 17:34:54

○NSns-uk.1and1-dns.com2015-11-24 → 2016-12-02 · 4 obs

● 2015-11-24 23:30:56
● 2016-12-02 14:08:38
○ 2018-08-29 12:47:38
○ 2026-07-29 17:34:54

○NSns-uk.1and1-dns.org2015-11-24 → 2016-12-02 · 4 obs

● 2015-11-24 23:30:56
● 2016-12-02 14:08:38
○ 2018-08-29 12:47:38
○ 2026-07-29 17:34:54

○NSsalvador.ns.porkbun.com2026-02-18 → 2026-03-25 · 5 obs

○ 2018-08-29 12:47:38
● 2026-02-18 07:04:38
● 2026-03-25 14:19:16
○ 2026-04-09 12:03:16
○ 2026-07-29 17:34:54

●NSzelda.ns.cloudflare.com2026-04-09 → 2026-07-29 · 3 obs

○ 2026-03-25 14:19:16
● 2026-04-09 12:03:16
● 2026-07-29 17:34:54

●MXalt1.aspmx.l.google.com2026-04-09 → 2026-07-29 · 3 obs

○ 2026-03-25 14:19:16
● 2026-04-09 12:03:16
● 2026-07-29 17:34:54

●MXalt2.aspmx.l.google.com2026-04-09 → 2026-07-29 · 3 obs

○ 2026-03-25 14:19:16
● 2026-04-09 12:03:16
● 2026-07-29 17:34:54

●MXalt3.aspmx.l.google.com2026-04-09 → 2026-07-29 · 3 obs

○ 2026-03-25 14:19:16
● 2026-04-09 12:03:16
● 2026-07-29 17:34:54

●MXalt4.aspmx.l.google.com2026-04-09 → 2026-07-29 · 3 obs

○ 2026-03-25 14:19:16
● 2026-04-09 12:03:16
● 2026-07-29 17:34:54

●MXaspmx.l.google.com2026-04-09 → 2026-07-29 · 3 obs

○ 2026-03-25 14:19:16
● 2026-04-09 12:03:16
● 2026-07-29 17:34:54

○MXfirstclassbuild-com.mail.protection.outlook.com2026-02-18 → 2026-03-25 · 5 obs

○ 2018-08-29 12:47:38
● 2026-02-18 07:04:38
● 2026-03-25 14:19:16
○ 2026-04-09 12:03:16
○ 2026-07-29 17:34:54

○MXmx00.1and1.co.uk2015-11-24 → 2016-12-02 · 4 obs

● 2015-11-24 23:30:56
● 2016-12-02 14:08:38
○ 2018-08-29 12:47:38
○ 2026-07-29 17:34:54

○MXmx01.1and1.co.uk2015-11-24 → 2016-12-02 · 4 obs

● 2015-11-24 23:30:56
● 2016-12-02 14:08:38
○ 2018-08-29 12:47:38
○ 2026-07-29 17:34:54

●MXsmtp.google.com2026-04-09 → 2026-07-29 · 3 obs

○ 2026-03-25 14:19:16
● 2026-04-09 12:03:16
● 2026-07-29 17:34:54

●A104.21.91.1712026-04-09 → 2026-07-29 · 3 obs

○ 2026-03-25 14:19:16
● 2026-04-09 12:03:16
● 2026-07-29 17:34:54

●A172.67.175.2082026-04-09 → 2026-07-29 · 3 obs

○ 2026-03-25 14:19:16
● 2026-04-09 12:03:16
● 2026-07-29 17:34:54

○A2001:8d8:1001:533f:6436:6ddb:f176:40162016-05-03 → 2016-12-02 · 5 obs

○ 2016-02-10 15:08:38
● 2016-05-03 12:59:24
● 2016-12-02 14:08:38
○ 2018-08-29 12:47:38
○ 2026-07-29 17:34:54

○A2001:8d8:1001:533f:6781:1ab2:5b16:280e2015-11-24 → 2016-02-10 · 4 obs

● 2015-11-24 23:30:56
● 2016-02-10 15:08:38
○ 2016-05-03 12:59:24
○ 2026-07-29 17:34:54

○A217.160.231.182016-05-03 → 2016-12-02 · 5 obs

○ 2016-02-10 15:08:38
● 2016-05-03 12:59:24
● 2016-12-02 14:08:38
○ 2018-08-29 12:47:38
○ 2026-07-29 17:34:54

●A2606:4700:3033::6815:5bab2026-07-08 → 2026-07-29 · 3 obs

○ 2026-04-09 12:03:16
● 2026-07-08 08:05:08
● 2026-07-29 17:34:54

○A2606:4700:3033::ac43:afd02026-04-09 → 2026-04-09 · 4 obs

○ 2026-03-25 14:19:16
● 2026-04-09 12:03:16
○ 2026-07-08 08:05:08
○ 2026-07-29 17:34:54

○A2606:4700:3035::6815:5bab2026-04-09 → 2026-04-09 · 4 obs

○ 2026-03-25 14:19:16
● 2026-04-09 12:03:16
○ 2026-07-08 08:05:08
○ 2026-07-29 17:34:54

●A2606:4700:3036::ac43:afd02026-07-08 → 2026-07-29 · 3 obs

○ 2026-04-09 12:03:16
● 2026-07-08 08:05:08
● 2026-07-29 17:34:54

○A44.230.85.2412026-02-18 → 2026-03-25 · 5 obs

○ 2018-08-29 12:47:38
● 2026-02-18 07:04:38
● 2026-03-25 14:19:16
○ 2026-04-09 12:03:16
○ 2026-07-29 17:34:54

○A52.33.207.72026-02-18 → 2026-03-25 · 5 obs

○ 2018-08-29 12:47:38
● 2026-02-18 07:04:38
● 2026-03-25 14:19:16
○ 2026-04-09 12:03:16
○ 2026-07-29 17:34:54

○A82.165.32.72015-11-24 → 2016-02-10 · 4 obs

● 2015-11-24 23:30:56
● 2016-02-10 15:08:38
○ 2016-05-03 12:59:24
○ 2026-07-29 17:34:54

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
firstclassbuild.com	zelda.ns.cloudflare.com, armando.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.192.242

NS records: zelda.ns.cloudflare.com, armando.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for firstclassbuild.com (unsigned zone)

⏱️ Timing

Total: 1703ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.91.171, 172.67.175.208`
AAAA	2	`2606:4700:3033::6815:5bab, 2606:4700:3036::ac43:afd0`
NS	2	`armando.ns.cloudflare.com, zelda.ns.cloudflare.com`
MX	6	`smtp.google.com (pri: 1), alt1.aspmx.l.google.com (pri: 10)...`
TXT	2	`google-site-verification=PmrVR3cks2mckrl, v=spf1 include:_spf.google.com ~all`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`armando.ns.cloudflare.com dns.cloudflare`

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

firstclassbuild.com directs to four IP numbers, which are 104.21.91.171, 172.67.175.208, 2606:4700:3033::6815:5bab and 2606:4700:3036::ac43:afd0.

Among the host names that share IP numbers with firstclassbuild.com are xrszy.com, plausible.winesitting.eu, clubfouras.fr and two others.

Name Servers

firstclassbuild.com uses two name servers for its delegation: armando.ns.cloudflare.com and zelda.ns.cloudflare.com.

firstclassbuild.com has the same NS records as nearest.cash, avsestate.ru, rslinks.net and pmtt.hu.

At least some of firstclassbuild.com's name servers are shared with other domains, for example mywebs.com.cn, tower888.com, mizukachan.com and two more.

It is common for these name servers to be used in conjunction with the name servers harleigh.ns.cloudflare.com, ines.ns.cloudflare.com and arvind.ns.cloudflare.com.

Host names resolving to 6 IP numbers:

Hostname armando.ns.cloudflare.com directs to 108.162.195.225, 162.159.44.225 and 172.64.35.225 along with 3 other IP addresses.

Hostname zelda.ns.cloudflare.com directs to 108.162.192.242, 172.64.32.242 and 173.245.58.242 along with 3 other IP addresses.

Mail Servers

firstclassbuild.com uses 6 mail servers for delivery: smtp.google.com, aspmx.l.google.com, alt1.aspmx.l.google.com and 3 other.

firstclassbuild.com shares at least some of its mail servers with other domains — for example ns500671.ns500731.ns500731.ns500742.ns500704.ns500731.ns500705.ns500671.ns500688.ns500291.lustychickser.com, ns500759.ns500759.ns500758.ns500759.ns500735.ns500735.ns500735.ns500698.ns500698.ns500698.ns500686.ns500576.ns500576.trackreceptor.com, ns500742.ns500742.ns500742.ns500731.ns500671.ns500731.ns500671.ns500705.ns500704.ns500671.ns500291.ns500666.ns500291.ns500131.lustychickser.com and two more.

It is common to find these mail servers paired with mail servers alt2.aspmx.l.google.com, alt4.aspmx.l.google.com, alt3.aspmx.l.google.com and 4 more.

Host names resolving to 9 IP numbers:

Hostname smtp.google.com directs to 142.251.163.26, 142.251.163.27 and 173.194.45.26 along with 6 other IP addresses.

Hosts with two IP numbers each:

aspmx.l.google.com directs traffic to 173.194.45.26 and 2607:f8b0:4004:c1b::1b.

alt1.aspmx.l.google.com directs traffic to 108.177.123.26 and 2800:3f0:4003:c0f::1b.

alt2.aspmx.l.google.com directs traffic to 172.253.116.26 and 2a00:1450:400b:c02::1b.

alt3.aspmx.l.google.com directs traffic to 192.178.223.26 and 2a00:1450:4009:c0f::1a.

alt4.aspmx.l.google.com directs traffic to 172.253.157.27 and 2a00:1450:400c:c23::1a.

Both smtp.google.com and aspmx.l.google.com resolve to 173.194.45.26 IP addresses each.