`o2.email.gradesfirst.com`

DNSSEC	⚠️ Not signed
A	198.21.1.32^{🇺🇸 ASN-SENDGRID198.21.0.0/21 Twilio, Inc. 1801 California Street Suite 500 Denver CO 80202 United States}
		PTR	`o2.email.gradesfirst.com`

`email.gradesfirst.com`

	CNAME	`sendgrid.net`
	DNSSEC	⚠️ Not signed
	A	3.20.87.51^{🇺🇸 Amazon3.20.0.0/14 EC2 CMH prefix}
	A	3.20.194.73^{🇺🇸 Amazon3.20.0.0/14 EC2 CMH prefix}
	A	3.220.122.174^{🇺🇸 Amazon3.208.0.0/12 EC2 IAD prefix}
	A	3.231.179.208^{🇺🇸 Amazon3.224.0.0/12 EC2 IAD prefix}
	A	18.224.219.179^{🇺🇸 Amazon18.224.0.0/14 EC2 CMH prefix}
	A	54.158.174.185^{🇺🇸 Amazon54.156.0.0/14 EC2 IAD prefix}
	NS	`ns10.dnsmadeeasy.com` ⭐
	NS	`ns11.dnsmadeeasy.com`
	NS	`ns12.dnsmadeeasy.com`
	NS	`ns13.dnsmadeeasy.com`
	NS	`ns14.dnsmadeeasy.com`
	NS	`ns15.dnsmadeeasy.com`
	MX	`mx2.sendgrid.net` ⭐
	MX	`mx.sendgrid.net`⁽²⁰⁾
	TXT	`p8bnb2lp424dkl3c4io1aemiei`
	TXT	`google-site-verification=1UEf8ey-RibUjY6gnpqIZFjWNqMknmeyeHz1zTmj0DE`
	TXT	`l8bqrl0r33q4joeb79q8uuj009`
	TXT	`cemmvnbghpsb500d7c19e35fgm`
	TXT	`utjqqjvmeadmlva41ectre9gd3`
	TXT	`6ifgg010qg6mquqt5lodun8qds`
	TXT	`5m3r13nvilmq8tgf5foh6ki1uv`
	TXT	`mailru-verification: 2e3995fa8a7d00e0`
	TXT	`i52uk89q4nfe1mpgqv5qsmsj3j.`
	TXT	`yahoo-verification-key=TrufSXS+dfythA5AIMbLUnkX38rjr1HR93gbqHUSY74=`
	TXT	`v=spf1 ip4:167.89.0.0/17 ip4:208.117.48.0/20 ip4:50.31.32.0/19 ip4:198.37.144...`
	SOA	`ns10.dnsmadeeasy.com`dns@dnsmadeeasy.com serial=2011297499

Same first word

o2.com.hk

o2.eu

o2.tv

o2.net.pl

o2.uk

o2.team

o2.cc

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o2.se

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o2.academy

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o2.click

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o2.hu

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o2.ma

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2o.house

2o.pl

2o.org

2o.cz

2o.be

2o.ca

2o.com

2o.cn

2o.fr

2o.cc

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2o.at

2o.si

2o.co

2o.cx

2o.de

2o.su

2o.hu

2o.no

2o.cl

2o.nl

2o.dk

2o.hk

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net...	-
gradesfirst.com	ns-163.awsdns-20.com, ns-602.awsdns-11.net, ns-1801.awsdns-33.co.uk, ns-1469.awsdns-55.org	2 records

✅ Authoritative Response

Server:205.251.192.163

NS records: ns-163.awsdns-20.com, ns-602.awsdns-11.net, ns-1801.awsdns-33.co.uk, ns-1469.awsdns-55.org

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for gradesfirst.com (unsigned zone)

⏱️ Timing

Total: 454ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`198.21.1.32`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns-163.awsdns-20.com, ns-163.awsdns-20.com)

Analysis

IP Addresses

o2.email.gradesfirst.com resolves to a single IP address: 198.21.1.32.

o2.email.gradesfirst.com - robtex.com