`costain-group.com`

DNSSEC	⚠️ Not signed
A	212.100.249.243^{🇬🇧 RACKSPACE-LON212.100.224.0/19 RSPC}
		PTR	`kitelinux.co.uk`
NS	`ns1.gtt.net` ⭐
		A	208.77.65.118^{🇺🇸 GTT-BACKBONE208.77.64.0/21 GTT}
			PTR	`ns1.gtt.net`
			PTR	`ns1.idcglobal.net`
NS	`ns2.gtt.net`
		A	77.67.56.118^{🇬🇧 GTT-BACKBONE77.67.0.0/17 GTT}
			PTR	`ns2.gtt.net`
NS	`ns3.gtt.net`
		A	199.116.149.29^{🇺🇸 GTT-BACKBONE199.116.149.0/24}
			PTR	`ns3.gtt.net`
			PTR	`ns3.idcglobal.net`
TXT	`MS=ms51356760`
TXT	`MS=ms93877167`
SOA	`ns1.gtt.net`hostmaster@gtt.net 2026-04-09 #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=1775937127

Same first word

costain-group.com

DNS History

13 records (4 active, 9 former)

○NSa.prim-ns.de2015-07-25 → 2020-02-06 · 4 obs

● 2015-07-25 20:32:16
● 2020-02-06 23:04:02
○ 2026-02-22 07:38:18
○ 2026-04-11 20:16:34

○NSa.sec-ns.de2015-07-25 → 2017-02-15 · 4 obs

● 2015-07-25 20:32:16
● 2017-02-15 07:00:00
○ 2020-02-06 23:04:02
○ 2026-04-11 20:16:34

○NSa.sec-ns.net2020-02-06 → 2020-02-06 · 4 obs

○ 2017-02-15 07:00:00
● 2020-02-06 23:04:02
○ 2026-02-22 07:38:18
○ 2026-04-11 20:16:34

○NSb.sec-ns.de2015-07-25 → 2017-02-15 · 4 obs

● 2015-07-25 20:32:16
● 2017-02-15 07:00:00
○ 2020-02-06 23:04:02
○ 2026-04-11 20:16:34

○NSc.sec-ns.de2015-07-25 → 2020-02-06 · 4 obs

● 2015-07-25 20:32:16
● 2020-02-06 23:04:02
○ 2026-02-22 07:38:18
○ 2026-04-11 20:16:34

○NSm.sec-ns.de2020-02-06 → 2020-02-06 · 4 obs

○ 2017-02-15 07:00:00
● 2020-02-06 23:04:02
○ 2026-02-22 07:38:18
○ 2026-04-11 20:16:34

○NSn.sec-ns.net2020-02-06 → 2020-02-06 · 4 obs

○ 2017-02-15 07:00:00
● 2020-02-06 23:04:02
○ 2026-02-22 07:38:18
○ 2026-04-11 20:16:34

●NSns1.gtt.net2026-02-22 → 2026-04-11 · 3 obs

○ 2020-02-06 23:04:02
● 2026-02-22 07:38:18
● 2026-04-11 20:16:34

●NSns2.gtt.net2026-02-22 → 2026-04-11 · 3 obs

○ 2020-02-06 23:04:02
● 2026-02-22 07:38:18
● 2026-04-11 20:16:34

●NSns3.gtt.net2026-02-22 → 2026-04-11 · 3 obs

○ 2020-02-06 23:04:02
● 2026-02-22 07:38:18
● 2026-04-11 20:16:34

○MXservice100.mimecast.com2015-07-25 → 2015-07-25 · 3 obs

● 2015-07-25 20:32:16
○ 2015-11-24 23:22:00
○ 2026-04-11 20:16:34

○MXservice99.mimecast.com2015-07-25 → 2015-07-25 · 3 obs

● 2015-07-25 20:32:16
○ 2015-11-24 23:22:00
○ 2026-04-11 20:16:34

●A212.100.249.2432015-07-25 → 2026-04-11 · 2 obs

● 2015-07-25 20:32:16
● 2026-04-11 20:16:34

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	b.gtld-servers.net, h.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
costain-group.com	ns2.gtt.net, ns3.gtt.net, ns1.gtt.net	-

✅ Authoritative Response

Server:208.77.65.118

NS records: ns2.gtt.net, ns3.gtt.net, ns1.gtt.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for costain-group.com (unsigned zone)

⏱️ Timing

Total: 602ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`212.100.249.243`
NS	3	`ns3.gtt.net, ns2.gtt.net...`
TXT	2	`MS=ms51356760, MS=ms93877167`
SOA	1	`ns1.gtt.net hostmaster.gtt.net`

Analysis

IP Addresses

costain-group.com points to a single IP number: 212.100.249.243.

Other host names, for instance epcoffshore.com, share IP numbers with costain-group.com.

Name Servers

The domain costain-group.com is delegated to three name servers: ns1.gtt.net, ns2.gtt.net and ns3.gtt.net.

costain-group.com shares name servers with other domains at least partially, for instance 52.177.95.in-addr.arpa, 126.152.93.in-addr.arpa, 30.35.8.in-addr.arpa, 130.93.66.in-addr.arpa and 46.177.95.in-addr.arpa.

these name servers are commonly used with the name servers ns0.easynet.co.uk, ns1.easynet.co.uk, soa0.airband.net, soa1.airband.net, a.adns.mdnx.net, b.adns.mdnx.net, dns0.easynet.be, dns1.easynet.be, dns2.easynet.be and dns3.easynet.be.

Host names with a single IP number:

ns1.gtt.net points to 208.77.65.118.

ns2.gtt.net points to 77.67.56.118.

ns3.gtt.net points to 199.116.149.29.

costain-group.com - robtex.com