`contractorsonline.com`

DNSSEC	⚠️ Not signed
A	24.178.207.116^{🇺🇸 Charter_Communications24.178.192.0/20}
		PTR	`syn-024-178-207-116.biz.spectrum.com`
NS	`ns1.contractorsonline.com` ⭐
		A	24.178.207.116^{🇺🇸 Charter_Communications24.178.192.0/20}
			PTR	`syn-024-178-207-116.biz.spectrum.com`
NS	`ns2.contractorsonline.com`
		A	24.178.207.116^{🇺🇸 Charter_Communications24.178.192.0/20}
			PTR	`syn-024-178-207-116.biz.spectrum.com`
MX	`mail.contractorsonline.com` ⭐
TXT	`v=spf1 +a +mx +a:INT1.OPTIMUSINTERNET.NET -all`
SOA	`ns1.contractorsonline.com`techteam@optimusinternet.com 2026-04-06 #1

`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=1776007027

Same first word

contractorsonline.com

DNS History

12 records (4 active, 8 former)

○NSns0.optimusinternet.net2020-03-08 → 2020-03-08 · 4 obs

○ 2017-03-31 23:28:44
● 2020-03-08 22:58:56
○ 2026-03-27 16:31:28
○ 2026-04-12 15:20:00

●NSns1.contractorsonline.com2026-03-27 → 2026-04-12 · 3 obs

○ 2020-03-08 22:58:56
● 2026-03-27 16:31:28
● 2026-04-12 15:20:00

○NSns1.optimusinternet.net2015-07-01 → 2017-03-31 · 4 obs

● 2015-07-01 02:26:36
● 2017-03-31 23:28:44
○ 2020-03-08 22:58:56
○ 2026-04-12 15:20:00

●NSns2.contractorsonline.com2026-03-27 → 2026-04-12 · 3 obs

○ 2020-03-08 22:58:56
● 2026-03-27 16:31:28
● 2026-04-12 15:20:00

○NSns3.optimusinternet.net2015-07-01 → 2017-03-31 · 4 obs

● 2015-07-01 02:26:36
● 2017-03-31 23:28:44
○ 2020-03-08 22:58:56
○ 2026-04-12 15:20:00

○NSns4.optimusinternet.net2020-03-08 → 2020-03-08 · 4 obs

○ 2017-03-31 23:28:44
● 2020-03-08 22:58:56
○ 2026-03-27 16:31:28
○ 2026-04-12 15:20:00

●MXmail.contractorsonline.com2026-04-12 → 2026-04-12 · 3 obs

○ 2026-03-27 16:31:28
● 2026-04-12 15:19:58
● 2026-04-12 15:20:00

○MXmail1.contractorsonline.com2015-07-01 → 2020-03-08 · 4 obs

● 2015-07-01 02:26:36
● 2020-03-08 22:58:56
○ 2026-03-27 16:31:28
○ 2026-04-12 15:20:00

○MXmail2.contractorsonline.com2015-07-01 → 2017-03-31 · 4 obs

● 2015-07-01 02:26:36
● 2017-03-31 23:28:44
○ 2020-03-08 22:58:56
○ 2026-04-12 15:20:00

○A162.244.65.802020-03-08 → 2020-03-08 · 4 obs

○ 2017-03-31 23:28:44
● 2020-03-08 22:58:56
○ 2026-03-27 16:31:28
○ 2026-04-12 15:20:00

●A24.178.207.1162026-03-27 → 2026-04-12 · 3 obs

○ 2020-03-08 22:58:56
● 2026-03-27 16:31:28
● 2026-04-12 15:20:00

○A69.64.72.692015-07-01 → 2017-03-31 · 4 obs

● 2015-07-01 02:26:36
● 2017-03-31 23:28:44
○ 2020-03-08 22:58:56
○ 2026-04-12 15:20:00

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	g.gtld-servers.net, j.gtld-servers.net, f.gtld-servers.net, l.gtld-servers.net...	-
contractorsonline.com	ns1.contractorsonline.com, ns2.contractorsonline.com	2 records

✅ Authoritative Response

Server:24.178.207.116

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for contractorsonline.com (unsigned zone)

⏱️ Timing

Total: 289ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`24.178.207.116`
NS	2	`ns1.contractorsonline.com, ns2.contractorsonline.com`
MX	1	`mail.contractorsonline.com (pri: 10)`
TXT	1	`v=spf1 +a +mx +a:INT1.OPTIMUSINTERNET.NE`
SOA	1	`ns1.contractorsonline.com techteam.optim`

📌 Glue Records Collected

Total: 2

In-bailiwick: 2 (ns1.contractorsonline.com, ns2.contractorsonline.com)

Analysis

IP Addresses

contractorsonline.com resolves to one IP number: 24.178.207.116.

other host names including www.zumbo.com, ns2.optimusinternet.net, ns1.optimusmd.com, communitystation.com and ga.optimuslaw.com share IP numbers with contractorsonline.com.

Name Servers

contractorsonline.com is delegated to two name servers ns1.contractorsonline.com and ns2.contractorsonline.com.

Host names with a single IP:

ns1.contractorsonline.com points to 24.178.207.116.

ns2.contractorsonline.com points to 24.178.207.116.

Host names pointing to 24.178.207.116: ns1.contractorsonline.com and ns2.contractorsonline.com.

Mail Servers

contractorsonline.com is handled by a single mail server, mail.contractorsonline.com.

contractorsonline.com - robtex.com