`usecastup.com`

DNSSEC	⚠️ Not signed
A	23.21.157.88^{🇺🇸 Amazon23.20.0.0/15 EC2 IAD prefix}
		PTR	`ec2-23-21-157-88.compute-1.amazonaws.com`
A	23.21.234.173^{🇺🇸 Amazon23.20.0.0/15 EC2 IAD prefix}
NS	`dns1.registrar-servers.com` ⭐
		A	2610:a1:1024::200^{🇺🇸 MAINT-ID-120082610:a1:1024::/48 Neustar}
			PTR	`dns1.namecheaphosting.com`
			PTR	`dns1.registrar-servers.com`
		A	156.154.132.200^{🇺🇸 MAINT-ID-12008156.154.132.0/24 Neustar}
			PTR	`dns1.namecheaphosting.com`
			PTR	`dns1.registrar-servers.com`
NS	`dns2.registrar-servers.com`
		A	2610:a1:1025::200^{🇺🇸 MAINT-ID-120082610:a1:1025::/48 Neustar}
			PTR	`dns2.namecheaphosting.com`
			PTR	`dns2.registrar-servers.com`
		A	156.154.133.200^{🇺🇸 MAINT-ID-12008156.154.133.0/24 Neustar}
			PTR	`dns2.namecheaphosting.com`
			PTR	`dns2.registrar-servers.com`
MX	`aspmx.l.google.com` ⭐
		A	2607:f8b0:4004:c19::1b^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`bk-in-f27.1e100.net`
		A	172.253.62.27^{🇺🇸 Google172.253.62.0/24}
			PTR	`bc-in-f27.1e100.net`
MX	`alt1.aspmx.l.google.com`⁽⁵⁾
		A	2607:f8b0:4003:c30::1b^{🇺🇸 Google2607:f8b0:4003::/48}
			PTR	`yutulis-in-f27.1e100.net`
		A	74.125.27.26^{🇺🇸 Google74.125.27.0/24}
			PTR	`yutulis-in-f26.1e100.net`
MX	`alt2.aspmx.l.google.com`⁽⁵⁾
		A	2607:f8b0:4001:c70::1a^{🇺🇸 Google2607:f8b0:4001::/48}
			PTR	`yucbful-in-f26.1e100.net`
		A	192.178.209.26^{🇺🇸 Google192.178.209.0/24}
			PTR	`yucbful-in-f26.1e100.net`
MX	`aspmx2.googlemail.com`⁽¹⁰⁾
		A	2607:f8b0:4023:2801::1b^{🇺🇸 Google2607:f8b0::/32}
			PTR	`lcausi-in-f27.1e100.net`
		A	192.178.128.27^{🇺🇸 Google192.178.128.0/24}
			PTR	`lcausi-in-f27.1e100.net`
MX	`aspmx3.googlemail.com`⁽¹⁰⁾
		A	2607:f8b0:4023:1015::1b^{🇺🇸 Google2607:f8b0::/32}
			PTR	`yudfwta-in-f27.1e100.net`
		A	172.253.135.26^{🇺🇸 Google172.253.135.0/24}
			PTR	`yudfwta-in-f26.1e100.net`
TXT	`Sendinblue-code:56d289358b3e34d396745d3287f9f22c`
TXT	`google-site-verification=w2nSL2quORu35zvKKRzGyyloT2HTxq6diT5IpH4GU6g`
SOA	`dns1.registrar-servers.com`hostmaster@registrar-servers.com serial=1774238312

`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=1771291435

Same first word

usecastup.com

DNS History

11 records (9 active, 2 former)

●NSdns1.registrar-servers.com2019-02-12 → 2026-03-24 · 2 obs

● 2019-02-12 11:17:12
● 2026-03-24 11:05:44

●NSdns2.registrar-servers.com2019-02-12 → 2026-03-24 · 2 obs

● 2019-02-12 11:17:12
● 2026-03-24 11:05:44

●MXalt1.aspmx.l.google.com2019-02-12 → 2026-03-24 · 2 obs

● 2019-02-12 11:17:12
● 2026-03-24 11:05:44

●MXalt2.aspmx.l.google.com2019-02-12 → 2026-03-24 · 2 obs

● 2019-02-12 11:17:12
● 2026-03-24 11:05:44

●MXaspmx.l.google.com2019-02-12 → 2026-03-24 · 2 obs

● 2019-02-12 11:17:12
● 2026-03-24 11:05:44

●MXaspmx2.googlemail.com2019-02-12 → 2026-03-24 · 2 obs

● 2019-02-12 11:17:12
● 2026-03-24 11:05:44

●MXaspmx3.googlemail.com2019-02-12 → 2026-03-24 · 2 obs

● 2019-02-12 11:17:12
● 2026-03-24 11:05:44

●A23.21.157.882026-03-24 → 2026-03-24 · 3 obs

○ 2019-02-12 11:17:12
● 2026-03-24 11:05:42
● 2026-03-24 11:05:44

●A23.21.234.1732026-03-24 → 2026-03-24 · 3 obs

○ 2019-02-12 11:17:12
● 2026-03-24 11:05:42
● 2026-03-24 11:05:44

○A34.193.204.922019-02-12 → 2019-02-12 · 3 obs

● 2019-02-12 11:17:12
○ 2026-03-24 11:05:42
○ 2026-03-24 11:05:44

○A34.193.69.2522019-02-12 → 2019-02-12 · 3 obs

● 2019-02-12 11:17:12
○ 2026-03-24 11:05:42
○ 2026-03-24 11:05:44

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
usecastup.com	dns1.registrar-servers.com, dns2.registrar-servers.com	4 records

✅ Authoritative Response

Server:156.154.133.200

NS records: dns1.registrar-servers.com, dns2.registrar-servers.com

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 902ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`23.21.157.88, 23.21.234.173`
NS	2	`dns1.registrar-servers.com, dns2.registrar-servers.com`
MX	5	`aspmx.l.google.com (pri: 1), alt1.aspmx.l.google.com (pri: 5)...`
TXT	2	`Sendinblue-code:56d289358b3e34d396745d32, google-site-verification=w2nSL2quORu35zv`
SOA	1	`dns1.registrar-servers.com hostmaster.re`

📌 Glue Records Collected

Total: 4

Out-of-bailiwick: 4 (dns1.registrar-servers.com, dns1.registrar-servers.com, dns2.registrar-servers.com...)

Analysis

IP Addresses

usecastup.com resolves to two IP numbers: 23.21.157.88 and 23.21.234.173.

Other host names, for instance goldenlife.coach, chowa.com, editos.de, brownandjacksonprojects.com and hitrock.com share IP numbers with usecastup.com.

Name Servers

Two name servers dns1.registrar-servers.com and dns2.registrar-servers.com handle delegation for usecastup.com.

usecastup.com uses the same name server setup as other domains, for example vidstring.com, advtec.eu, findleys.net, 350aaaa.com and meeclaim.com.