🛡️Domain Reputation CheckBlocklist, phishing & malware status→

`teachingopensource.com`

DNSSEC	⚠️ Not signed
A	140.211.9.53^{🇺🇸 LINK-OREGON140.211.0.0/16 University of Oregon}
		PTR	`vip-lb1.osuosl.org`
NS	`ns1.auth.osuosl.org` ⭐
		A	2605:bc80:3010::140^{🇺🇸 LINK-OREGON2605:bc80::/32 University of Oregon}
			PTR	`ns1.auth.osuosl.org`
		A	140.211.166.140^{🇺🇸 LINK-OREGON140.211.0.0/16 University of Oregon}
			PTR	`ns1.auth.osuosl.org`
NS	`ns2.auth.osuosl.org`
		A	2605:bc80:3010::141^{🇺🇸 LINK-OREGON2605:bc80::/32 University of Oregon}
			PTR	`ns2.auth.osuosl.org`
		A	140.211.166.141^{🇺🇸 LINK-OREGON140.211.0.0/16 University of Oregon}
			PTR	`ns2.auth.osuosl.org`
NS	`ns3.auth.osuosl.org`
		A	2600:3402:600:24::153^{🇺🇸 TDS-AS2600:3400::/28 TDS Telecom route object}
			PTR	`ns3.auth.osuosl.org`
		A	216.165.191.53^{🇺🇸 TDS-AS216.165.128.0/18 TDS Telecom}
			PTR	`ns3.auth.osuosl.org`
SOA	`ns1.auth.osuosl.org`hostmaster@osuosl.org 2023-03-17 #0

`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=1786780929

Same first word

teachingopensource.net

teachingopensource.org

teachingopensource.com

DNS History

6 records (4 active, 2 former)

●NSns1.auth.osuosl.org2015-08-20 → 2026-08-15 · 2 obs

● 2015-08-20 12:28:14
● 2026-08-15 08:15:40

●NSns2.auth.osuosl.org2015-08-20 → 2026-08-15 · 2 obs

● 2015-08-20 12:28:14
● 2026-08-15 08:15:40

●NSns3.auth.osuosl.org2015-08-20 → 2026-08-15 · 2 obs

● 2015-08-20 12:28:14
● 2026-08-15 08:15:40

○MXmail.teachingopensource.org2015-08-20 → 2021-10-23 · 4 obs

● 2015-08-20 12:28:14
● 2021-10-23 20:59:22
○ 2026-06-27 21:30:46
○ 2026-08-15 08:15:40

○A140.211.15.902015-08-20 → 2017-02-12 · 4 obs

● 2015-08-20 12:28:14
● 2017-02-12 03:02:28
○ 2020-01-02 05:12:20
○ 2026-08-15 08:15:40

●A140.211.9.532020-01-02 → 2026-08-15 · 3 obs

○ 2017-02-12 03:02:28
● 2020-01-02 05:12:20
● 2026-08-15 08:15:40

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	k.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net, m.gtld-servers.net...	-
teachingopensource.com	ns1.auth.osuosl.org, ns2.auth.osuosl.org, ns3.auth.osuosl.org	-

✅ Authoritative Response

Server:140.211.166.141

NS records: ns1.auth.osuosl.org, ns2.auth.osuosl.org, ns3.auth.osuosl.org

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for teachingopensource.com (unsigned zone)

⏱️ Timing

Total: 498ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`140.211.9.53`
NS	3	`ns1.auth.osuosl.org, ns2.auth.osuosl.org...`
SOA	1	`ns1.auth.osuosl.org hostmaster.osuosl.or`

Analysis

IP Addresses

teachingopensource.com resolves to just one IP address, 140.211.9.53.

Two other host names, along with lists.uclibc.org, ja-sig.org and lists.parrot.org, also share IP numbers with teachingopensource.com.

Name Servers

teachingopensource.com carries NS records delegating to ns1.auth.osuosl.org, ns2.auth.osuosl.org and ns3.auth.osuosl.org.

teachingopensource.com shares at least some of its name servers with other domains, including 0.1.0.3.0.8.c.b.5.0.6.2.ip6.arpa, deluge-torrent.org, uclibc.org and two others.

ns1.auth.osuosl.org, ns2.auth.osuosl.org and ns3.auth.osuosl.org are three hostnames that each resolve to a pair of IP addresses: ns1.auth.osuosl.org to 140.211.166.140 and 2605:bc80:3010::140, ns2.auth.osuosl.org to 140.211.166.141 and 2605:bc80:3010::141, and ns3.auth.osuosl.org to 216.165.191.53 and 2600:3402:600:24::153.

teachingopensource.com - robtex.com