firstclassbuild.com - robtex.com

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 ⭐
A2607:f8b0:4023:c03::1a🇺🇸 Google2607:f8b0::/32
PTRdy-in-f26.1e100.net
A2607:f8b0:4023:c0b::1b🇺🇸 Google2607:f8b0::/32
PTRdd-in-f27.1e100.net
A2607:f8b0:4023:c0d::1a🇺🇸 Google2607:f8b0::/32
PTRdl-in-f26.1e100.net
A2607:f8b0:4023:c0d::1b🇺🇸 Google2607:f8b0::/32
PTRdl-in-f27.1e100.net
A74.125.137.26🇺🇸 Google74.125.137.0/24
PTRdy-in-f26.1e100.net
A74.125.137.27🇺🇸 Google74.125.137.0/24
PTRdy-in-f27.1e100.net
A142.250.141.26🇺🇸 Google142.250.141.0/24
PTRdd-in-f26.1e100.net
A142.251.2.26🇺🇸 Google142.251.2.0/24
PTRip-142-251-2-26.defastlink.net
A142.251.2.27🇺🇸 Google142.251.2.0/24
PTRdl-in-f27.1e100.net
MXaspmx.l.google.com(5)
A2607:f8b0:4023:c06::1a🇺🇸 Google2607:f8b0::/32
PTRdz-in-f26.1e100.net
A74.125.137.26🇺🇸 Google74.125.137.0/24
PTRdy-in-f26.1e100.net
MXalt1.aspmx.l.google.com(10)
A2800:3f0:4003:c0f::1a🇨🇱 Google2800:3f0:4003::/48
A108.177.123.27🇺🇸 Google108.177.123.0/24
PTRlcscld-in-f27.1e100.net
MXalt2.aspmx.l.google.com(10)
A2607:f8b0:4023:1015::1a🇺🇸 Google2607:f8b0::/32
PTRyudfwta-in-f26.1e100.net
A172.253.135.27🇺🇸 Google172.253.135.0/24
PTRyudfwta-in-f27.1e100.net
MXalt3.aspmx.l.google.com(20)
A2607:f8b0:4023:3003::1a🇺🇸 Google2607:f8b0::/32
PTRyulnkjt-in-f26.1e100.net
A172.253.145.26🇺🇸 Google172.253.145.0/24
PTRyulnkjt-in-f26.1e100.net
MXalt4.aspmx.l.google.com(20)
A2607:f8b0:4003:c4a::1b🇺🇸 Google2607:f8b0:4003::/48
PTRyutulth-in-f27.1e100.net
A142.251.96.26🇺🇸 Google142.250.0.0/15
PTRyutulth-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=129, name=cloudflare-ech.com
SOAarmando.ns.cloudflare.comdns@cloudflare.com serial=2400455332

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=1775735707

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 → 2026-04-09 · 3 obs
○ 2026-03-25 14:19:16
● 2026-04-09 12:03:16
● 2026-04-09 12:03:18
○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
○ 2026-04-09 12:03:18
○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
○ 2026-04-09 12:03:18
○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
○ 2026-04-09 12:03:18
○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
○ 2026-04-09 12:03:18
○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
○ 2026-04-09 12:03:18
○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
○ 2026-04-09 12:03:18
○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
○ 2026-04-09 12:03:18
○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
○ 2026-04-09 12:03:18
●NSzelda.ns.cloudflare.com2026-04-09 → 2026-04-09 · 3 obs
○ 2026-03-25 14:19:16
● 2026-04-09 12:03:16
● 2026-04-09 12:03:18
●MXalt1.aspmx.l.google.com2026-04-09 → 2026-04-09 · 3 obs
○ 2026-03-25 14:19:16
● 2026-04-09 12:03:16
● 2026-04-09 12:03:18
●MXalt2.aspmx.l.google.com2026-04-09 → 2026-04-09 · 3 obs
○ 2026-03-25 14:19:16
● 2026-04-09 12:03:16
● 2026-04-09 12:03:18
●MXalt3.aspmx.l.google.com2026-04-09 → 2026-04-09 · 3 obs
○ 2026-03-25 14:19:16
● 2026-04-09 12:03:16
● 2026-04-09 12:03:18
●MXalt4.aspmx.l.google.com2026-04-09 → 2026-04-09 · 3 obs
○ 2026-03-25 14:19:16
● 2026-04-09 12:03:16
● 2026-04-09 12:03:18
●MXaspmx.l.google.com2026-04-09 → 2026-04-09 · 3 obs
○ 2026-03-25 14:19:16
● 2026-04-09 12:03:16
● 2026-04-09 12:03:18
○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
○ 2026-04-09 12:03:18
○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
○ 2026-04-09 12:03:18
○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
○ 2026-04-09 12:03:18
●MXsmtp.google.com2026-04-09 → 2026-04-09 · 3 obs
○ 2026-03-25 14:19:16
● 2026-04-09 12:03:16
● 2026-04-09 12:03:18
●A104.21.91.1712026-04-09 → 2026-04-09 · 3 obs
○ 2026-03-25 14:19:16
● 2026-04-09 12:03:16
● 2026-04-09 12:03:18
●A172.67.175.2082026-04-09 → 2026-04-09 · 3 obs
○ 2026-03-25 14:19:16
● 2026-04-09 12:03:16
● 2026-04-09 12:03:18
○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
○ 2026-04-09 12:03:18
○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
○ 2026-04-09 12:03:18
○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
○ 2026-04-09 12:03:18
●A2606:4700:3033::ac43:afd02026-04-09 → 2026-04-09 · 3 obs
○ 2026-03-25 14:19:16
● 2026-04-09 12:03:16
● 2026-04-09 12:03:18
●A2606:4700:3035::6815:5bab2026-04-09 → 2026-04-09 · 3 obs
○ 2026-03-25 14:19:16
● 2026-04-09 12:03:16
● 2026-04-09 12:03:18
○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
○ 2026-04-09 12:03:18
○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
○ 2026-04-09 12:03:18
○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
○ 2026-04-09 12:03:18

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
comg.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net, k.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: 160ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.175.208, 104.21.91.171
AAAA22606:4700:3033::ac43:afd0, 2606:4700:3035::6815:5bab
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

firstclassbuild.com points to four IP numbers: 2606:4700:3033::ac43:afd0, 2606:4700:3035::6815:5bab, 104.21.91.171 and 172.67.175.208.

Other host names, for instance magicmonkeys.net, hagenconcretecutting.com, uaaaww.living, plausible.winesitting.eu and modelcarsoftheworld.com.au share IP numbers with firstclassbuild.com.

Name Servers

firstclassbuild.com's delegation is to two name servers armando.ns.cloudflare.com and zelda.ns.cloudflare.com.

firstclassbuild.com uses the same name server setup as other domains, including nearest.cash, avsestate.ru, rslinks.net and pmtt.hu.

firstclassbuild.com at least partially shares its name servers with other domains, for instance mywebs.com.cn, tower888.com, suite36nyc.com, tappedout.net and inghamcountyparks.org.

These name servers are commonly used with ines.ns.cloudflare.com, fred.ns.cloudflare.com and harleigh.ns.cloudflare.com.

Host names with six IP numbers:

armando.ns.cloudflare.com points to: 2606:4700:58::a29f:2ce1, 2803:f800:50::6ca2:c3e1, 2a06:98c1:50::ac40:23e1, 108.162.195.225, 162.159.44.225 and 172.64.35.225.

zelda.ns.cloudflare.com points to: 2606:4700:50::adf5:3af2, 2803:f800:50::6ca2:c0f2, 2a06:98c1:50::ac40:20f2, 108.162.192.242, 172.64.32.242 and 173.245.58.242.

Mail Servers

Six mail servers handle firstclassbuild.com: smtp.google.com, aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com, alt3.aspmx.l.google.com and alt4.aspmx.l.google.com.

firstclassbuild.com shares some mail servers with other domains, including 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, ns500731.ns500671.ns500671.ns500742.ns500688.ns500705.ns500704.ns500678.ns500671.ns500688.ns500671.ns500649.lustychickser.com and ns500754.ns500731.ns500671.ns500704.ns500705.ns500705.ns500704.ns500649.ns500291.ns500671.ns500666.lustychickser.com.

these mail servers are often used alongside the mail servers aspmx2.googlemail.com, aspmx3.googlemail.com, aspmx4.googlemail.com and aspmx5.googlemail.com.

Host names with nine IP numbers: smtp.google.com points to 2607:f8b0:4023:c03::1a, 2607:f8b0:4023:c0b::1b, 2607:f8b0:4023:c0d::1a, 2607:f8b0:4023:c0d::1b, 74.125.137.26, 74.125.137.27, 142.250.141.26, 142.251.2.26 and 142.251.2.27.

Host names with two IP numbers: aspmx.l.google.com points to 2607:f8b0:4023:c06::1a and 74.125.137.26; alt1.aspmx.l.google.com points to 2800:3f0:4003:c0f::1a and 108.177.123.27; alt2.aspmx.l.google.com points to 2607:f8b0:4023:1015::1a and 172.253.135.27; alt3.aspmx.l.google.com points to 2607:f8b0:4023:3003::1a and 172.253.145.26; alt4.aspmx.l.google.com points to 2607:f8b0:4003:c4a::1b and 142.251.96.26.

Host names that point to 74.125.137.26: smtp.google.com and aspmx.l.google.com.