`textbookspdf.com`

DNSSEC	⚠️ Not signed
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	`mx2.zoho.com` ⭐
		A	136.143.183.44^{🇺🇸 ZohoAS136.143.182.0/23 Zoho}
			PTR	`mx2.zoho.com`
			PTR	`mx3.zoho.com`
			PTR	`mx.zoho.com`
			PTR	`mx2.zohomail.com`
			PTR	`mx3.zohomail.com`
			PTR	`mx.zohomail.com`
MX	`mx3.zoho.com`⁽²⁰⁾
		A	136.143.191.44^{🇺🇸 ZohoAS136.143.190.0/23 Zoho Corporation}
			PTR	`mx2.zoho.com`
			PTR	`mx3.zoho.com`
			PTR	`mx.zoho.com`
			PTR	`mx2.zohomail.com`
			PTR	`mx3.zohomail.com`
			PTR	`mx.zohomail.com`
MX	`mx.zoho.com`⁽⁵⁰⁾
		A	136.143.183.44^{🇺🇸 ZohoAS136.143.182.0/23 Zoho}
			PTR	`mx2.zoho.com`
			PTR	`mx3.zoho.com`
			PTR	`mx.zoho.com`
			PTR	`mx2.zohomail.com`
			PTR	`mx3.zohomail.com`
			PTR	`mx.zohomail.com`
		A	136.143.191.44^{🇺🇸 ZohoAS136.143.190.0/23 Zoho Corporation}
			PTR	`mx2.zoho.com`
			PTR	`mx3.zoho.com`
			PTR	`mx.zoho.com`
			PTR	`mx2.zohomail.com`
			PTR	`mx3.zohomail.com`
			PTR	`mx.zohomail.com`
TXT	`zoho-verification=zb66167031.zmverify.zoho.com`
SOA	`dns1.registrar-servers.com`hostmaster@registrar-servers.com serial=1747309905

`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=1774624217

Same first word

textbookspdf.com

Similar names

textbookpdfs.com

pdftextbooks.com

DNS History

7 records (5 active, 2 former)

○NSa.dns.hostway.net2015-06-12 → 2016-01-13 · 4 obs

● 2015-06-12 09:19:24
● 2016-01-13 20:36:30
○ 2016-04-02 09:18:42
○ 2026-03-27 15:27:44

●NSdns1.registrar-servers.com2026-03-27 → 2026-03-27 · 2 obs

○ 2016-04-02 09:18:42
● 2026-03-27 15:27:44

●NSdns2.registrar-servers.com2026-03-27 → 2026-03-27 · 2 obs

○ 2016-04-02 09:18:42
● 2026-03-27 15:27:44

●MXmx.zoho.com2026-03-27 → 2026-03-27 · 1 obs

● 2026-03-27 15:27:44

●MXmx2.zoho.com2026-03-27 → 2026-03-27 · 1 obs

● 2026-03-27 15:27:44

●MXmx3.zoho.com2026-03-27 → 2026-03-27 · 1 obs

● 2026-03-27 15:27:44

○A199.91.174.1152015-06-12 → 2016-01-13 · 4 obs

● 2015-06-12 09:19:24
● 2016-01-13 20:36:30
○ 2016-04-02 09:18:42
○ 2026-03-27 15:27:44

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	m.gtld-servers.net, i.gtld-servers.net, b.gtld-servers.net, e.gtld-servers.net...	-
textbookspdf.com	dns1.registrar-servers.com, dns2.registrar-servers.com	4 records

✅ Authoritative Response

Server:156.154.132.200

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for textbookspdf.com (unsigned zone)

⏱️ Timing

Total: 281ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	2	`dns1.registrar-servers.com, dns2.registrar-servers.com`
MX	3	`mx.zoho.com (pri: 10), mx2.zoho.com (pri: 20)...`
TXT	1	`zoho-verification=zb66167031.zmverify.zo`
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

Name Servers

textbookspdf.com is delegated to two name servers: dns1.registrar-servers.com and dns2.registrar-servers.com.

textbookspdf.com uses the same name server setup as other domains such as onehopeunited.org, vrero.com, autumnbound.com, nightsoulms.com and engpay.com.

textbookspdf.com shares name servers with other domains at least partially, for example mattalexander.me, cardiologger.com, chilirumble.com, explorefar.com and l(0x65726f746963).net.

These name servers are commonly used with dns3.registrar-servers.com, dns4.registrar-servers.com and dns5.registrar-servers.com.

Host names with two IP numbers:

dns1.registrar-servers.com points to 2610:a1:1024::200 and 156.154.132.200; dns2.registrar-servers.com points to 2610:a1:1025::200 and 156.154.133.200.

Mail Servers

textbookspdf.com is served by three mail servers: mx2.zoho.com, mx3.zoho.com and mx.zoho.com.

textbookspdf.com shares mail servers with other domains at least partially; for instance ademaras.com, pallimous.com, supercargo.mx, simo.la and uptop1.com.