`firstteaching.com`

DNSSEC	⚠️ Not signed
A	207.148.248.143^{🇺🇸 EIG-29873207.148.248.0/24}
		PTR	`ip-207-148-248-143.defastlink.net`
NS	`ns.buydomains.com` ⚠️ Not in zone NS records
		A	52.20.26.87^{🇺🇸 Amazon52.20.0.0/14 EC2 IAD prefix}
			PTR	`ec2-52-20-26-87.compute-1.amazonaws.com`
NS	`this-domain-for-sale.com` ⚠️ Not in zone NS records
		A	52.20.26.87^{🇺🇸 Amazon52.20.0.0/14 EC2 IAD prefix}
			PTR	`ec2-52-20-26-87.compute-1.amazonaws.com`

`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=1771291435

Subdomains

mail.firstteaching.com

Same first word

firstteaching.com

Similar names

richtigfasten.de

DNS History

4 records (3 active, 1 former)

●NSns.buydomains.com2015-07-08 → 2026-03-23 · 2 obs

● 2015-07-08 13:12:04
● 2026-03-23 12:26:56

●NSthis-domain-for-sale.com2026-02-25 → 2026-03-23 · 3 obs

○ 2015-07-08 13:12:04
● 2026-02-25 18:59:42
● 2026-03-23 12:26:56

●A207.148.248.1432015-11-10 → 2026-03-23 · 3 obs

○ 2015-07-08 13:12:04
● 2015-11-10 17:09:26
● 2026-03-23 12:26:56

○A50.63.202.1042015-07-08 → 2015-07-08 · 3 obs

● 2015-07-08 13:12:04
○ 2015-11-10 17:09:26
○ 2026-03-23 12:26:56

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
firstteaching.com	ns.buydomains.com, this-domain-for-sale.com	2 records

✅ Authoritative Response

Server:52.4.207.204

NS records: ns.buydomains.com, this-domain-for-sale.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for firstteaching.com (unsigned zone)

⏱️ Timing

Total: 3043ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`207.148.248.143`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns.buydomains.com, this-domain-for-sale.com)

Analysis

Hierarchy

firstteaching.com is a parent of mail.firstteaching.com.

IP Addresses

firstteaching.com points to a single IP number: 207.148.248.143.

Other host names, for instance stringscenter.com, www.barbecuesplus.com, extraordinaryroutine.com, feathernet.com and countylocal.com share IP numbers with firstteaching.com.

Name Servers

Delegation for firstteaching.com rests with two name servers, this-domain-for-sale.com and ns.buydomains.com.

firstteaching.com shares the same name server setup as other domains, including gardensart.com, consultantjunction.com, audiomats.com, heateddesigns.com and sewfaithful.com.

firstteaching.com shares name servers with other domains at least partially, for example definingtechnologies.com.

Host names sharing a single IP:

this-domain-for-sale.com points to 52.20.26.87

ns.buydomains.com points to 52.20.26.87

Host names that point to 52.20.26.87: this-domain-for-sale.com and ns.buydomains.com

firstteaching.com - robtex.com