`mail.ptbisco.com`

	DNSSEC	⚠️ Not signed
	A	223.130.85.55^{🇰🇷 DIRECT-AS-KR223.130.85.0/24}

`ptbisco.com`

	DNSSEC	⚠️ Not signed
	NS	`ns1.direct.co.kr` ⭐
	NS	`ns1.sdsns.com`
	NS	`ns2.sdsns.com`
	MX	`mail.ptbisco.com` ⭐
	TXT	`v=spf1 include:_spf1.mailnara.co.kr include:_spf2.mailnara.co.kr include:_spf...`
	SOA	`ns1.direct.co.kr`firechoi@sds.co.kr 2014-07-04 #13

MX for

ptbisco.com

Same first word

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DNS History

1 record (1 active, 0 former)

●A223.130.85.552015-08-11 → 2026-08-01 · 2 obs

● 2015-08-11 18:03:00
● 2026-08-01 15:39:24

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
ptbisco.com	ns1.sdsns.com, ns2.sdsns.com	2 records

✅ Authoritative Response

Server:211.239.157.110

NS records: ns1.sdsns.com, ns2.sdsns.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for ptbisco.com (unsigned zone)

⏱️ Timing

Total: 608ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`223.130.85.55`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns1.sdsns.com, ns2.sdsns.com)

Analysis

Mail Server Role

The mail server mail.ptbisco.com processes email for ptbisco.com.

IP Addresses

mail.ptbisco.com resolves to just one IP address, 223.130.85.55.

Two other host names, along with mail.krfood.org, mail.prodenti.com and mail.widept.com, also share IP numbers with mail.ptbisco.com.

mail.ptbisco.com - robtex.com

mail.ptbisco.com

ptbisco.com