firstclassbuild.com - dns.ninja

firstclassbuild.com

DNSSEC⚠️ Not signed
A2606:4700:3033::ac43:afd0🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3035::6815:5bab🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.91.171Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.175.208🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSarmando.ns.cloudflare.com ⭐
A2606:4700:58::a29f:2ce1🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRarmando.ns.cloudflare.com
A2803:f800:50::6ca2:c3e1🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRarmando.ns.cloudflare.com
A2a06:98c1:50::ac40:23e1🇺🇸 Cloudflare2a06:98c1:50::/45
PTRarmando.ns.cloudflare.com
A108.162.195.225🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRarmando.ns.cloudflare.com
A162.159.44.225Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRarmando.ns.cloudflare.com
A172.64.35.225🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRarmando.ns.cloudflare.com
NSzelda.ns.cloudflare.com
A2606:4700:50::adf5:3af2🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRzelda.ns.cloudflare.com
A2803:f800:50::6ca2:c0f2🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRzelda.ns.cloudflare.com
A2a06:98c1:50::ac40:20f2🇺🇸 Cloudflare2a06:98c1:50::/45
PTRzelda.ns.cloudflare.com
A108.162.192.242🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRzelda.ns.cloudflare.com
A172.64.32.242🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRzelda.ns.cloudflare.com
A173.245.58.242🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRzelda.ns.cloudflare.com
MXsmtp.google.com ⭐
A2a00:1450:4009:c0f::1a🇬🇧 Google2a00:1450:4009::/48
PTRyulhrs-in-f26.1e100.net
A2a00:1450:4009:c0f::1b🇬🇧 Google2a00:1450:4009::/48
PTRyulhrs-in-f27.1e100.net
A2a00:1450:4009:c19::1a🇬🇧 Google2a00:1450:4009::/48
PTRyulhrp-in-f26.1e100.net
A172.217.76.26🇺🇸 Google172.217.76.0/24
PTRyulhrp-in-f26.1e100.net
A192.178.223.26🇺🇸 Google192.178.223.0/24
PTRyulhrs-in-f26.1e100.net
A192.178.223.27🇺🇸 Google192.178.223.0/24
PTRyulhrs-in-f27.1e100.net
MXaspmx.l.google.com(5)
A2607:f8b0:4023:c03::1a🇺🇸 Google2607:f8b0::/32
PTRdy-in-f26.1e100.net
A142.250.101.27🇺🇸 Google142.250.101.0/24
PTRdz-in-f27.1e100.net
MXalt1.aspmx.l.google.com(10)
A2800:3f0:4003:c0f::1b🇨🇱 Google2800:3f0:4003::/48
A108.177.123.27🇺🇸 Google108.177.123.0/24
PTRlcscld-in-f27.1e100.net
MXalt2.aspmx.l.google.com(10)
A2a00:1450:400b:c02::1b🇮🇪 Google2a00:1450:400b::/48
PTRdj-in-f27.1e100.net
A172.253.116.26🇺🇸 Google172.253.116.0/24
PTRdj-in-f26.1e100.net
MXalt3.aspmx.l.google.com(20)
A2607:f8b0:4023:1015::1b🇺🇸 Google2607:f8b0::/32
PTRyudfwta-in-f27.1e100.net
A172.253.135.26🇺🇸 Google172.253.135.0/24
PTRyudfwta-in-f26.1e100.net
MXalt4.aspmx.l.google.com(20)
A2607:f8b0:4001:c70::1b🇺🇸 Google2607:f8b0:4001::/48
PTRyucbful-in-f27.1e100.net
A192.178.209.26🇺🇸 Google192.178.209.0/24
PTRyucbful-in-f26.1e100.net
TXTgoogle-site-verification=PmrVR3cks2mckrlIkuf0yseb5LiJqj3_76EVzBlwT7w
TXTv=spf1 include:_spf.google.com ~all
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.91.171, 172.67.175.208
IPv6 hints2606:4700:3033::ac43:afd0, 2606:4700:3035::6815:5bab
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=200, name=cloudflare-ech.com
SOAarmando.ns.cloudflare.comdns@cloudflare.com serial=2405995718

com

DNSSEC🔒 Signed (DS record present)
NSa.gtld-servers.net ⭐
NSb.gtld-servers.net
NSc.gtld-servers.net
NSd.gtld-servers.net
NSe.gtld-servers.net
NSf.gtld-servers.net
NSg.gtld-servers.net
NSh.gtld-servers.net
NSi.gtld-servers.net
NSj.gtld-servers.net
NSk.gtld-servers.net
NSl.gtld-servers.net
NSm.gtld-servers.net
SOAa.gtld-servers.netnstld@verisign-grs.com serial=1780545139

Same first word

firstclassbuild.com

DNS History

29 records (12 active, 17 former)

20162017201820192020202120222023202420252026NSarmando.ns.cloudflare.comzelda.ns.cloudflare.comcuritiba.ns.porkbun.comfortaleza.ns.porkbun.commaceio.ns.porkbun.comns-uk.1and1-dns.bizns-uk.1and1-dns.co.ukns-uk.1and1-dns.comns-uk.1and1-dns.orgsalvador.ns.porkbun.comMXalt1.aspmx.l.google.comalt2.aspmx.l.google.comalt3.aspmx.l.google.comalt4.aspmx.l.google.comaspmx.l.google.comsmtp.google.comfirstclassbuild-com.mail.protection.outlook.commx00.1and1.co.ukmx01.1and1.co.ukA104.21.91.171172.67.175.2082606:4700:3033::ac43:afd02606:4700:3035::6815:5bab2001:8d8:1001:533f:6436:6ddb:f176:40162001:8d8:1001:533f:6781:1ab2:5b16:280e217.160.231.1844.230.85.24152.33.207.782.165.32.7
●NSarmando.ns.cloudflare.com2026-04-09 → 2026-06-04 · 3 obs
○ 2026-03-25 14:19:16
● 2026-04-09 12:03:16
● 2026-06-04 04:19:16
○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
○ 2026-06-04 04:19:16
○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
○ 2026-06-04 04:19:16
○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
○ 2026-06-04 04:19:16
○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
○ 2026-06-04 04:19:16
○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
○ 2026-06-04 04:19:16
○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
○ 2026-06-04 04:19:16
○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
○ 2026-06-04 04:19:16
○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
○ 2026-06-04 04:19:16
●NSzelda.ns.cloudflare.com2026-04-09 → 2026-06-04 · 3 obs
○ 2026-03-25 14:19:16
● 2026-04-09 12:03:16
● 2026-06-04 04:19:16
●MXalt1.aspmx.l.google.com2026-04-09 → 2026-06-04 · 3 obs
○ 2026-03-25 14:19:16
● 2026-04-09 12:03:16
● 2026-06-04 04:19:16
●MXalt2.aspmx.l.google.com2026-04-09 → 2026-06-04 · 3 obs
○ 2026-03-25 14:19:16
● 2026-04-09 12:03:16
● 2026-06-04 04:19:16
●MXalt3.aspmx.l.google.com2026-04-09 → 2026-06-04 · 3 obs
○ 2026-03-25 14:19:16
● 2026-04-09 12:03:16
● 2026-06-04 04:19:16
●MXalt4.aspmx.l.google.com2026-04-09 → 2026-06-04 · 3 obs
○ 2026-03-25 14:19:16
● 2026-04-09 12:03:16
● 2026-06-04 04:19:16
●MXaspmx.l.google.com2026-04-09 → 2026-06-04 · 3 obs
○ 2026-03-25 14:19:16
● 2026-04-09 12:03:16
● 2026-06-04 04:19:16
○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
○ 2026-06-04 04:19:16
○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
○ 2026-06-04 04:19:16
○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
○ 2026-06-04 04:19:16
●MXsmtp.google.com2026-04-09 → 2026-06-04 · 3 obs
○ 2026-03-25 14:19:16
● 2026-04-09 12:03:16
● 2026-06-04 04:19:16
●A104.21.91.1712026-04-09 → 2026-06-04 · 3 obs
○ 2026-03-25 14:19:16
● 2026-04-09 12:03:16
● 2026-06-04 04:19:16
●A172.67.175.2082026-04-09 → 2026-06-04 · 3 obs
○ 2026-03-25 14:19:16
● 2026-04-09 12:03:16
● 2026-06-04 04:19:16
○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
○ 2026-06-04 04:19:16
○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
○ 2026-06-04 04:19:16
○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
○ 2026-06-04 04:19:16
●A2606:4700:3033::ac43:afd02026-04-09 → 2026-06-04 · 3 obs
○ 2026-03-25 14:19:16
● 2026-04-09 12:03:16
● 2026-06-04 04:19:16
●A2606:4700:3035::6815:5bab2026-04-09 → 2026-06-04 · 3 obs
○ 2026-03-25 14:19:16
● 2026-04-09 12:03:16
● 2026-06-04 04:19:16
○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
○ 2026-06-04 04:19:16
○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
○ 2026-06-04 04:19:16
○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
○ 2026-06-04 04:19:16

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coma.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...-
firstclassbuild.comzelda.ns.cloudflare.com, armando.ns.cloudflare.com12 records

✅ Authoritative Response

Server:108.162.195.225

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: 1840ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.91.171, 172.67.175.208
AAAA22606:4700:3035::6815:5bab, 2606:4700:3033::ac43:afd0
NS2armando.ns.cloudflare.com, zelda.ns.cloudflare.com
MX6smtp.google.com (pri: 1), alt1.aspmx.l.google.com (pri: 10)...
TXT2google-site-verification=PmrVR3cks2mckrl, v=spf1 include:_spf.google.com ~all
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1armando.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

With 4 IP addresses, firstclassbuild.com directs to 104.21.91.171, 172.67.175.208, 2606:4700:3033::ac43:afd0 and 2606:4700:3035::6815:5bab.

Among the host names that share IP numbers with firstclassbuild.com are magicmonkeys.net, hagenconcretecutting.com, xrszy.com 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 ines.ns.cloudflare.com, arvind.ns.cloudflare.com and harleigh.ns.cloudflare.com.

Host names resolving to 6 IP numbers:

armando.ns.cloudflare.com directs to 108.162.195.225, 162.159.44.225, 172.64.35.225 and three others.

zelda.ns.cloudflare.com directs to 108.162.192.242, 172.64.32.242, 173.245.58.242 and three others.

Mail Servers

firstclassbuild.com is handled by 6 mail servers, smtp.google.com, aspmx.l.google.com, alt1.aspmx.l.google.com and three 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.

These mail servers often co-occur with alt2.aspmx.l.google.com, alt4.aspmx.l.google.com, alt3.aspmx.l.google.com and four other mail servers.

Host names resolving to 6 IP numbers:

smtp.google.com directs to 172.217.76.26, 192.178.223.26, 192.178.223.27 and three others.

Hosts with two IP numbers each:

aspmx.l.google.com directs traffic to 142.250.101.27 and 2607:f8b0:4023:c03::1a.

alt1.aspmx.l.google.com directs traffic to 108.177.123.27 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 172.253.135.26 and 2607:f8b0:4023:1015::1b.

alt4.aspmx.l.google.com directs traffic to 192.178.209.26 and 2607:f8b0:4001:c70::1b.