`criticalblue.com`

DNSSEC	⚠️ Not signed
A	3.171.76.27^{🇺🇸 Amazon}
		PTR	`server-3-171-76-27.iad89.r.cloudfront.net`
A	3.171.76.53^{🇺🇸 Amazon}
A	3.171.76.88^{🇺🇸 Amazon}
A	3.171.76.97^{🇺🇸 Amazon}
NS	`ns-356.awsdns-44.com` ⭐
		A	2600:9000:5301:6400::1^{🇺🇸 Amazon}
			PTR	`ns-356.awsdns-44.com`
		A	205.251.193.100^{🇺🇸 Amazon}
			PTR	`ns-356.awsdns-44.com`
NS	`ns-1051.awsdns-03.org`
		A	2600:9000:5304:1b00::1^{🇺🇸 Amazon}
			PTR	`ns-1051.awsdns-03.org`
		A	205.251.196.27^{🇺🇸 Amazon}
			PTR	`ns-1051.awsdns-03.org`
NS	`ns-1798.awsdns-32.co.uk`
		A	2600:9000:5307:600::1^{🇺🇸 Amazon}
			PTR	`ns-1798.awsdns-32.co.uk`
		A	205.251.199.6^{🇺🇸 Amazon}
			PTR	`ns-1798.awsdns-32.co.uk`
NS	`ns-976.awsdns-58.net`
		A	2600:9000:5303:d000::1^{🇺🇸 Amazon}
			PTR	`ns-976.awsdns-58.net`
		A	205.251.195.208^{🇺🇸 Amazon}
			PTR	`ns-976.awsdns-58.net`
MX	`aspmx.l.google.com` ⭐
		A	2607:f8b0:4004:c19::1b^{🇺🇸 Google}
			PTR	`bk-in-f27.1e100.net`
		A	172.253.62.27^{🇺🇸 Google}
			PTR	`bc-in-f27.1e100.net`
MX	`alt1.aspmx.l.google.com`⁽⁵⁾
		A	2607:f8b0:4003:c30::1b^{🇺🇸 Google}
			PTR	`yutulis-in-f27.1e100.net`
		A	74.125.27.26^{🇺🇸 Google}
			PTR	`yutulis-in-f26.1e100.net`
MX	`alt2.aspmx.l.google.com`⁽⁵⁾
		A	2607:f8b0:4001:c70::1a^{🇺🇸 Google}
			PTR	`yucbful-in-f26.1e100.net`
		A	192.178.209.26^{🇺🇸 Google}
			PTR	`yucbful-in-f26.1e100.net`
MX	`alt3.aspmx.l.google.com`⁽¹⁰⁾
		A	2607:f8b0:4024:c0d::1b^{🇺🇸 Google}
			PTR	`mj-in-f27.1e100.net`
		A	192.178.152.26^{🇺🇸 Google}
			PTR	`mj-in-f26.1e100.net`
MX	`alt4.aspmx.l.google.com`⁽¹⁰⁾
		A	2607:f8b0:4023:403::1a^{🇺🇸 Google}
			PTR	`gg-in-f26.1e100.net`
		A	142.250.96.27^{🇺🇸 Google}
			PTR	`gg-in-f27.1e100.net`
TXT	`google-site-verification=LPcJAxptMAEygCnLGat-FY1DG44eXeubPoFXUz55T8Y`
TXT	`google-site-verification=ZZHHvqEBSX4hop1byz7AcwCIPcTSjTUNvHQGvQKPxYc`
TXT	`google-site-verification=ba9Lof9V9AcpuiRBux1fpfH3ZECoc5GRaCpgVube0N0`
TXT	`v=spf1 include:amazonses.com include:2449407.spf08.hubspotemail.net include:_...`
SOA	`ns-356.awsdns-44.com`awsdns-hostmaster@amazon.com serial=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=1771291435

WOT: SAFE (61/100)

Up

www.criticalblue.com

Same first word

criticalblue.com

criticalblue.co.uk

DNS History

41 records (13 active, 28 former)

●NSns-1051.awsdns-03.org2026-02-15 → 2026-02-22 · 3 obs

○ 2017-04-20 06:42:42
● 2026-02-15 20:59:12
● 2026-02-22 02:34:32

○NSns-1437.awsdns-51.org2017-04-20 → 2017-04-20 · 4 obs

○ 2016-06-18 03:02:42
● 2017-04-20 06:42:42
○ 2026-02-15 20:59:12
○ 2026-02-22 02:34:32

○NSns-1739.awsdns-25.co.uk2017-04-20 → 2017-04-20 · 4 obs

○ 2016-06-18 03:02:42
● 2017-04-20 06:42:42
○ 2026-02-15 20:59:12
○ 2026-02-22 02:34:32

●NSns-1798.awsdns-32.co.uk2026-02-15 → 2026-02-22 · 3 obs

○ 2017-04-20 06:42:42
● 2026-02-15 20:59:12
● 2026-02-22 02:34:32

●NSns-356.awsdns-44.com2026-02-15 → 2026-02-22 · 3 obs

○ 2017-04-20 06:42:42
● 2026-02-15 20:59:12
● 2026-02-22 02:34:32

○NSns-480.awsdns-60.com2017-04-20 → 2017-04-20 · 4 obs

○ 2016-06-18 03:02:42
● 2017-04-20 06:42:42
○ 2026-02-15 20:59:12
○ 2026-02-22 02:34:32

○NSns-917.awsdns-50.net2017-04-20 → 2017-04-20 · 4 obs

○ 2016-06-18 03:02:42
● 2017-04-20 06:42:42
○ 2026-02-15 20:59:12
○ 2026-02-22 02:34:32

●NSns-976.awsdns-58.net2026-02-15 → 2026-02-22 · 3 obs

○ 2017-04-20 06:42:42
● 2026-02-15 20:59:12
● 2026-02-22 02:34:32

○NSns1.easypost.com2008-03-20 → 2008-03-20 · 3 obs

● 2008-03-20 10:21:50
○ 2015-06-20 12:13:00
○ 2026-02-22 02:34:32

○NSns1.namecity.com2015-06-20 → 2016-06-18 · 5 obs

○ 2008-03-20 10:21:50
● 2015-06-20 12:13:00
● 2016-06-18 03:02:42
○ 2017-04-20 06:42:42
○ 2026-02-22 02:34:32

○NSns2.namecity.com2015-06-20 → 2016-06-18 · 5 obs

○ 2008-03-20 10:21:50
● 2015-06-20 12:13:00
● 2016-06-18 03:02:42
○ 2017-04-20 06:42:42
○ 2026-02-22 02:34:32

○NSns3.easypost.com2008-03-20 → 2008-03-20 · 3 obs

● 2008-03-20 10:21:50
○ 2015-06-20 12:13:00
○ 2026-02-22 02:34:32

●MXalt1.aspmx.l.google.com2017-04-20 → 2026-02-22 · 3 obs

○ 2015-06-20 12:13:00
● 2017-04-20 06:42:42
● 2026-02-22 02:34:32

●MXalt2.aspmx.l.google.com2017-04-20 → 2026-02-22 · 3 obs

○ 2015-06-20 12:13:00
● 2017-04-20 06:42:42
● 2026-02-22 02:34:32

●MXalt3.aspmx.l.google.com2017-04-20 → 2026-02-22 · 3 obs

○ 2015-06-20 12:13:00
● 2017-04-20 06:42:42
● 2026-02-22 02:34:32

●MXalt4.aspmx.l.google.com2017-04-20 → 2026-02-22 · 3 obs

○ 2015-06-20 12:13:00
● 2017-04-20 06:42:42
● 2026-02-22 02:34:32

●MXaspmx.l.google.com2017-04-20 → 2026-02-22 · 3 obs

○ 2015-06-20 12:13:00
● 2017-04-20 06:42:42
● 2026-02-22 02:34:32

○MXmail.criticalblue.com2015-06-20 → 2017-04-20 · 5 obs

○ 2008-03-20 10:21:50
● 2015-06-20 12:13:00
● 2017-04-20 06:42:42
○ 2026-02-15 20:59:12
○ 2026-02-22 02:34:32

○MXmx2.mailhop.org2015-06-20 → 2017-04-20 · 5 obs

○ 2008-03-20 10:21:50
● 2015-06-20 12:13:00
● 2017-04-20 06:42:42
○ 2026-02-15 20:59:12
○ 2026-02-22 02:34:32

○A13.33.153.212026-02-15 → 2026-02-19 · 8 obs

○ 2026-02-15 20:59:12
● 2026-02-15 23:51:04
● 2026-02-16 14:02:42
○ 2026-02-17 05:51:20
● 2026-02-18 13:59:44
● 2026-02-19 19:27:32
○ 2026-02-20 03:54:02
○ 2026-02-22 02:34:32

○A13.33.153.242026-02-15 → 2026-02-19 · 8 obs

○ 2026-02-15 20:59:12
● 2026-02-15 23:51:04
● 2026-02-16 14:02:42
○ 2026-02-17 05:51:20
● 2026-02-18 13:59:44
● 2026-02-19 19:27:32
○ 2026-02-20 03:54:02
○ 2026-02-22 02:34:32

○A13.33.153.612026-02-15 → 2026-02-19 · 8 obs

○ 2026-02-15 20:59:12
● 2026-02-15 23:51:04
● 2026-02-16 14:02:42
○ 2026-02-17 05:51:20
● 2026-02-18 13:59:44
● 2026-02-19 19:27:32
○ 2026-02-20 03:54:02
○ 2026-02-22 02:34:32

○A13.33.153.642026-02-15 → 2026-02-19 · 8 obs

○ 2026-02-15 20:59:12
● 2026-02-15 23:51:04
● 2026-02-16 14:02:42
○ 2026-02-17 05:51:20
● 2026-02-18 13:59:44
● 2026-02-19 19:27:32
○ 2026-02-20 03:54:02
○ 2026-02-22 02:34:32

●A3.171.76.272026-02-20 → 2026-02-22 · 5 obs

○ 2026-02-19 19:27:32
● 2026-02-20 03:54:02
○ 2026-02-21 06:08:12
● 2026-02-22 02:34:28
● 2026-02-22 02:34:32

●A3.171.76.532026-02-20 → 2026-02-22 · 5 obs

○ 2026-02-19 19:27:32
● 2026-02-20 03:54:02
○ 2026-02-21 06:08:12
● 2026-02-22 02:34:28
● 2026-02-22 02:34:32

●A3.171.76.882026-02-20 → 2026-02-22 · 5 obs

○ 2026-02-19 19:27:32
● 2026-02-20 03:54:02
○ 2026-02-21 06:08:12
● 2026-02-22 02:34:28
● 2026-02-22 02:34:32

●A3.171.76.972026-02-20 → 2026-02-22 · 5 obs

○ 2026-02-19 19:27:32
● 2026-02-20 03:54:02
○ 2026-02-21 06:08:12
● 2026-02-22 02:34:28
● 2026-02-22 02:34:32

○A46.101.19.2152015-06-20 → 2016-06-18 · 5 obs

○ 2008-03-20 10:21:50
● 2015-06-20 12:13:00
● 2016-06-18 03:02:42
○ 2017-04-20 06:42:42
○ 2026-02-22 02:34:32

○A52.222.244.232026-02-15 → 2026-02-21 · 10 obs

○ 2017-04-20 06:42:42
● 2026-02-15 20:59:12
○ 2026-02-15 23:51:04
○ 2026-02-16 14:02:42
● 2026-02-17 05:51:20
○ 2026-02-18 13:59:44
○ 2026-02-20 03:54:02
● 2026-02-21 06:08:12
○ 2026-02-22 02:34:28
○ 2026-02-22 02:34:32

○A52.222.244.542026-02-15 → 2026-02-21 · 10 obs

○A52.222.244.582026-02-15 → 2026-02-21 · 10 obs

○A52.222.244.932026-02-15 → 2026-02-21 · 10 obs

○A52.84.0.1052017-04-20 → 2017-04-20 · 4 obs

○ 2016-06-18 03:02:42
● 2017-04-20 06:42:42
○ 2026-02-15 20:59:12
○ 2026-02-22 02:34:32

○A52.84.0.1932017-04-20 → 2017-04-20 · 4 obs

○ 2016-06-18 03:02:42
● 2017-04-20 06:42:42
○ 2026-02-15 20:59:12
○ 2026-02-22 02:34:32

○A52.84.0.2032017-04-20 → 2017-04-20 · 4 obs

○ 2016-06-18 03:02:42
● 2017-04-20 06:42:42
○ 2026-02-15 20:59:12
○ 2026-02-22 02:34:32

○A52.84.0.222017-04-20 → 2017-04-20 · 4 obs

○ 2016-06-18 03:02:42
● 2017-04-20 06:42:42
○ 2026-02-15 20:59:12
○ 2026-02-22 02:34:32

○A52.84.0.502017-04-20 → 2017-04-20 · 4 obs

○ 2016-06-18 03:02:42
● 2017-04-20 06:42:42
○ 2026-02-15 20:59:12
○ 2026-02-22 02:34:32

○A52.84.0.602017-04-20 → 2017-04-20 · 4 obs

○ 2016-06-18 03:02:42
● 2017-04-20 06:42:42
○ 2026-02-15 20:59:12
○ 2026-02-22 02:34:32

○A52.84.0.702017-04-20 → 2017-04-20 · 4 obs

○ 2016-06-18 03:02:42
● 2017-04-20 06:42:42
○ 2026-02-15 20:59:12
○ 2026-02-22 02:34:32

○A52.84.0.852017-04-20 → 2017-04-20 · 4 obs

○ 2016-06-18 03:02:42
● 2017-04-20 06:42:42
○ 2026-02-15 20:59:12
○ 2026-02-22 02:34:32

○A62.233.121.752008-03-20 → 2008-03-20 · 3 obs

● 2008-03-20 10:21:50
○ 2015-06-20 12:13:00
○ 2026-02-22 02:34:32

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
criticalblue.com	ns-356.awsdns-44.com, ns-976.awsdns-58.net, ns-1798.awsdns-32.co.uk, ns-1051.awsdns-03.org	-

✅ Authoritative Response

Server: 205.251.193.100

NS records: ns-356.awsdns-44.com, ns-976.awsdns-58.net, ns-1798.awsdns-32.co.uk, ns-1051.awsdns-03.org

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for criticalblue.com (unsigned zone)

⏱️ Timing

Total: 1275ms | Queries: -

📄 Records

Type	Count	Sample Data
A	4	`3.171.76.97, 3.171.76.88...`
NS	4	`ns-1051.awsdns-03.org, ns-1798.awsdns-32.co.uk...`
MX	5	`aspmx.l.google.com (pri: 1), alt3.aspmx.l.google.com (pri: 10)...`
TXT	4	`google-site-verification=LPcJAxptMAEygCn, google-site-verification=ZZHHvqEBSX4hop1...`
SOA	1	`ns-356.awsdns-44.com awsdns-hostmaster.a`

AI analysis

criticalblue.com is the parent of www.criticalblue.com.

Four IP numbers are pointed to by criticalblue.com: 3.171.76.27, 3.171.76.53, 3.171.76.88 and 3.171.76.97.

other host names including ebc.edu.au, ooahs.com, gradebookk12.com, d3trh2hd43f1pn.cloudfront.net and ambraceramic.com share IP numbers with criticalblue.com.

criticalblue.com is delegated to four name servers: ns-356.awsdns-44.com, ns-976.awsdns-58.net, ns-1051.awsdns-03.org and ns-1798.awsdns-32.co.uk.

criticalblue.com at least partially shares name servers with other domains, for instance bandlist.de, us-east-1-2.telemetry.insights.video.a2z.com, actas-inc.co.jp, ch-host.net and plytix.net.

These name servers are commonly used alongside ns-204.awsdns-25.com and ns-1103.awsdns-09.org.

Host names with two IP numbers:

ns-356.awsdns-44.com points to 2600:9000:5301:6400::1 and 205.251.193.100; ns-976.awsdns-58.net points to 2600:9000:5303:d000::1 and 205.251.195.208; ns-1051.awsdns-03.org points to 2600:9000:5304:1b00::1 and 205.251.196.27; ns-1798.awsdns-32.co.uk points to 2600:9000:5307:600::1 and 205.251.199.6.

criticalblue.com is handled by five mail servers: aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com, alt3.aspmx.l.google.com and alt4.aspmx.l.google.com.

criticalblue.com shares some mail servers with other domains, at least partially, for instance ns500768.ns500758.ns500698.ns500758.ns500758.ns500735.ns500736.ns500698.ns500735.ns500708.ns500698.ns500708.ns500576.ns500576.ns500619.ns500576.trackreceptor.com, ns500754.ns500742.ns500731.ns500671.ns500704.ns500688.ns500705.ns500705.ns500678.ns500678.ns500678.ns500291.ns500291.ns500291.ns500291.ns500291.ns500131.lustychickser.com, ns500758.ns500759.ns500758.ns500759.ns500758.ns500736.ns500735.ns500735.ns500698.ns500735.ns500576.ns500708.ns500698.ns500698.ns500619.ns500576.trackreceptor.com, fiera.com.au and ns500754.ns500754.ns500742.ns500754.ns500754.ns500731.ns500705.ns500704.ns500704.ns500704.ns500291.ns500671.ns500671.ns500666.tenderladiesbz.com.

these mail servers are often used with aspmx2.googlemail.com, aspmx3.googlemail.com, aspmx4.googlemail.com and aspmx5.googlemail.com.

Host names with two IP numbers:

aspmx.l.google.com points to 2607:f8b0:4004:c19::1b and 172.253.62.27

alt1.aspmx.l.google.com points to 2607:f8b0:4003:c30::1b and 74.125.27.26

alt2.aspmx.l.google.com points to 2607:f8b0:4001:c70::1a and 192.178.209.26

alt3.aspmx.l.google.com points to 2607:f8b0:4024:c0d::1b and 192.178.152.26

alt4.aspmx.l.google.com points to 2607:f8b0:4023:403::1a and 142.250.96.27

criticalblue.com - robtex.com