`mail.101textbooks.com`

	DNSSEC	⚠️ Not signed
	A	172.93.48.106^{🇺🇸 HIVELOCITY-1172.93.48.0/24 SEA1 - CID18486}

`101textbooks.com`

	DNSSEC	⚠️ Not signed
	A	172.93.48.106^{🇺🇸 HIVELOCITY-1172.93.48.0/24 SEA1 - CID18486}
	NS	`dns1.registrar-servers.com` ⭐
	NS	`dns2.registrar-servers.com`
	MX	`mail.textbooks101.com` ⭐
	SOA	`dns1.registrar-servers.com`hostmaster@registrar-servers.com serial=1620062606

Previously MX for

101textbooks.com

Same first word

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DNS History

2 records (1 active, 1 former)

●A172.93.48.1062026-04-14 → 2026-04-14 · 3 obs

○ 2017-03-28 07:58:32
● 2026-04-14 10:53:12
● 2026-04-14 10:53:18

○A192.99.54.52017-03-28 → 2017-03-28 · 3 obs

● 2017-03-28 07:58:32
○ 2026-04-14 10:53:12
○ 2026-04-14 10:53:18

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	g.gtld-servers.net, b.gtld-servers.net, m.gtld-servers.net, h.gtld-servers.net...	-
101textbooks.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

⚠️ Insecure (no DNSSEC)

No DS record for 101textbooks.com (unsigned zone)

⏱️ Timing

Total: 251ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`172.93.48.106`

📌 Glue Records Collected

Total: 4

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

Analysis

IP Addresses

mail.101textbooks.com resolves to one IP number: 172.93.48.106.

Other host names, for instance mail.textbooks101.com, influencerspring.com, polairemarketing.com, mail.polairemarketing.com and ns1.polairemarketing.com share IP numbers with mail.101textbooks.com.

mail.101textbooks.com - robtex.com