`mail.bi0521.com`

DNSSEC	⚠️ Not signed
A	52.68.141.197^{🇯🇵 Amazon52.68.0.0/15 EC2 NRT prefix}
		PTR	`mail.dc-manage.com`

`bi0521.com`

	DNSSEC	⚠️ Not signed
	A	2600:9000:28f1:3200:13:f04e:40c0:93a1^{🇺🇸 Amazon2600:9000:28f1::/48}
	A	2600:9000:28f1:4200:13:f04e:40c0:93a1^{🇺🇸 Amazon2600:9000:28f1::/48}
	A	2600:9000:28f1:4e00:13:f04e:40c0:93a1^{🇺🇸 Amazon2600:9000:28f1::/48}
	A	2600:9000:28f1:5800:13:f04e:40c0:93a1^{🇺🇸 Amazon2600:9000:28f1::/48}
	A	2600:9000:28f1:8800:13:f04e:40c0:93a1^{🇺🇸 Amazon2600:9000:28f1::/48}
	A	2600:9000:28f1:9e00:13:f04e:40c0:93a1^{🇺🇸 Amazon2600:9000:28f1::/48}
	A	2600:9000:28f1:ac00:13:f04e:40c0:93a1^{🇺🇸 Amazon2600:9000:28f1::/48}
	A	2600:9000:28f1:ec00:13:f04e:40c0:93a1^{🇺🇸 Amazon2600:9000:28f1::/48}
	A	3.174.83.25^{🇺🇸 Amazon3.174.80.0/21}
	A	3.174.83.57^{🇺🇸 Amazon3.174.80.0/21}
	A	3.174.83.76^{🇺🇸 Amazon3.174.80.0/21}
	A	3.174.83.112^{🇺🇸 Amazon3.174.80.0/21}
	NS	`ns-596.awsdns-10.net` ⭐
	NS	`ns-1446.awsdns-52.org`
	NS	`ns-1925.awsdns-48.co.uk`
	NS	`ns-436.awsdns-54.com`
	MX	`mail.bi0521.com` ⭐
	TXT	`v=spf1 ip4:52.68.141.197 include:mail.bi0521.com ~all`
	SOA	`ns-596.awsdns-10.net`awsdns-hostmaster@amazon.com serial=1

MX for

bi0521.com

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DNS History

1 record (1 active, 0 former)

●A52.68.141.1972026-02-21 → 2026-04-12 · 2 obs

● 2026-02-21 07:25:58
● 2026-04-12 00:07:36

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	k.gtld-servers.net, l.gtld-servers.net, m.gtld-servers.net, a.gtld-servers.net...	-
bi0521.com	ns-596.awsdns-10.net, ns-436.awsdns-54.com, ns-1925.awsdns-48.co.uk, ns-1446.awsdns-52.org	1 record

✅ Authoritative Response

Server:205.251.197.166

NS records: ns-596.awsdns-10.net, ns-436.awsdns-54.com, ns-1925.awsdns-48.co.uk, ns-1446.awsdns-52.org

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for bi0521.com (unsigned zone)

⏱️ Timing

Total: 518ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`52.68.141.197`

📌 Glue Records Collected

Total: 1

Out-of-bailiwick: 1 (ns-436.awsdns-54.com)

Analysis

Mail Server Role

mail.bi0521.com serves as the mail server for bi0521.com.

IP Addresses

mail.bi0521.com points to a single IP address: 52.68.141.197.

Other host names such as mail.jollybull1026.com, mail.shu1229.com, mail.folkburger.net, mail.magokoro0421.com and mail.noblebeauty.net share IP numbers with mail.bi0521.com.

mail.bi0521.com - robtex.com

mail.bi0521.com

bi0521.com