🛡️Domain Reputation CheckBlocklist, phishing & malware status→

`referenceintervals.com`

DNSSEC	⚠️ Not signed
NS	`ns3.sickkids.ca` ⭐
		A	142.20.20.140^{🇨🇦 THE HOSPITAL FOR SICK CHILDREN142.20.0.0/16 The Hospital for Sick Children 555 University Avenue Toronto ON M5G-1X8 Canada}
			PTR	`ns3.sickkids.ca`
NS	`ns4.sickkids.ca`
		A	142.20.20.141^{🇨🇦 THE HOSPITAL FOR SICK CHILDREN142.20.0.0/16 The Hospital for Sick Children 555 University Avenue Toronto ON M5G-1X8 Canada}
			PTR	`ns4.sickkids.ca`
SOA	`ns3.sickkids.ca`postmaster@sickkids.ca serial=4

`com`

	DNSSEC	⚠️ Not signed
	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=1791204854

Same first word

referenceintervals.com

referenceintervals.org

Previous names

Next names

DNS History

13 records (2 active, 11 former)

○NSns01.referenceintervals.com2015-11-02 → 2016-04-10 · 5 obs

○ 2015-06-05 19:40:04
● 2015-11-02 14:42:58
● 2016-04-10 09:09:10
○ 2016-10-24 11:48:56
○ 2026-10-05 13:09:42

○NSns01.research.sickkids.ca2015-11-02 → 2016-04-10 · 5 obs

○ 2015-06-05 19:40:04
● 2015-11-02 14:42:58
● 2016-04-10 09:09:10
○ 2016-10-24 11:48:56
○ 2026-10-05 13:09:42

○NSns03.referenceintervals.com2015-11-02 → 2016-04-10 · 5 obs

○ 2015-06-05 19:40:04
● 2015-11-02 14:42:58
● 2016-04-10 09:09:10
○ 2016-10-24 11:48:56
○ 2026-10-05 13:09:42

○NSns1.netfirms.com2015-06-05 → 2015-06-05 · 3 obs

● 2015-06-05 19:40:04
○ 2015-11-02 14:42:58
○ 2026-10-05 13:09:42

○NSns2.netfirms.com2015-06-05 → 2015-06-05 · 3 obs

● 2015-06-05 19:40:04
○ 2015-11-02 14:42:58
○ 2026-10-05 13:09:42

●NSns3.sickkids.ca2026-09-29 → 2026-10-05 · 3 obs

○ 2016-10-24 11:48:56
● 2026-09-29 13:23:56
● 2026-10-05 13:09:42

●NSns4.sickkids.ca2026-09-29 → 2026-10-05 · 3 obs

○ 2016-10-24 11:48:56
● 2026-09-29 13:23:56
● 2026-10-05 13:09:42

○MXfwmail01.sickkids.ca2015-11-02 → 2016-04-10 · 5 obs

○ 2015-06-05 19:40:04
● 2015-11-02 14:42:58
● 2016-04-10 09:09:10
○ 2016-10-24 11:48:56
○ 2026-10-05 13:09:42

○MXfwmail03.sickkids.ca2015-11-02 → 2016-04-10 · 5 obs

○ 2015-06-05 19:40:04
● 2015-11-02 14:42:58
● 2016-04-10 09:09:10
○ 2016-10-24 11:48:56
○ 2026-10-05 13:09:42

○MXmailrelay.research.sickkids.ca2015-11-02 → 2016-04-10 · 5 obs

○ 2015-06-05 19:40:04
● 2015-11-02 14:42:58
● 2016-04-10 09:09:10
○ 2016-10-24 11:48:56
○ 2026-10-05 13:09:42

○MXmx.referenceintervals.com2015-06-05 → 2015-06-05 · 3 obs

● 2015-06-05 19:40:04
○ 2015-11-02 14:42:58
○ 2026-10-05 13:09:42

○A192.75.158.1042015-11-02 → 2016-04-10 · 5 obs

○ 2015-06-05 19:40:04
● 2015-11-02 14:42:58
● 2016-04-10 09:09:10
○ 2016-10-24 11:48:56
○ 2026-10-05 13:09:42

○A209.59.212.1492015-06-05 → 2015-06-05 · 3 obs

● 2015-06-05 19:40:04
○ 2015-11-02 14:42:58
○ 2026-10-05 13:09:42

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
referenceintervals.com	ns3.sickkids.ca, ns4.sickkids.ca	-

✅ Authoritative Response

Server:142.20.20.141

NS records: ns3.sickkids.ca, ns4.sickkids.ca

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for referenceintervals.com (unsigned zone)

⏱️ Timing

Total: 455ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	2	`ns3.sickkids.ca, ns4.sickkids.ca`
SOA	1	`ns3.sickkids.ca postmaster.sickkids.ca`

Analysis

Name Servers

The NS records for referenceintervals.com delegate to ns3.sickkids.ca and ns4.sickkids.ca.

referenceintervals.com uses the same name servers as several other domains — among them aboutkidshealth.org, aboutkidshealth.ca, centreantipoisonontario.com and two more.

Some of referenceintervals.com's name servers are also used by other domains, including kidshealthalliance.ca, porcch.ca, sickkids.ca and pcmch.on.ca.

These name servers are regularly seen alongside ns3.kidshealthalliance.ca and ns4.kidshealthalliance.ca as name servers.

ns3.sickkids.ca resolves to 142.20.20.140. ns4.sickkids.ca resolves to 142.20.20.141. Both host names point to a single IP number.

referenceintervals.com - robtex.com