`cluster25.instructure.com`

CNAME	`canvas-iad-prod-c25-1036235123.us-east-1.elb.amazonaws.com`
DNSSEC	⚠️ Not signed
A	44.199.237.40^{🇺🇸 Amazon44.192.0.0/11 EC2 IAD prefix}
		PTR	`ec2-44-199-237-40.compute-1.amazonaws.com`
A	44.199.237.103^{🇺🇸 Amazon44.192.0.0/11 EC2 IAD prefix}
A	44.199.238.230^{🇺🇸 Amazon44.192.0.0/11 EC2 IAD prefix}

`instructure.com`

	DNSSEC	⚠️ Not signed
	A	151.101.2.132^{🇺🇸 Fastly151.101.0.0/22}
	A	151.101.66.132^{🇺🇸 Fastly151.101.64.0/22}
	NS	`ns-2.awsdns-00.com` ⭐
	NS	`ns-1354.awsdns-41.org`
	NS	`ns-1799.awsdns-32.co.uk`
	NS	`ns-996.awsdns-60.net`
	MX	`aspmx.l.google.com` ⭐
	MX	`alt1.aspmx.l.google.com`⁽¹⁰⁾
	MX	`alt2.aspmx.l.google.com`⁽¹⁰⁾
	MX	`aspmx2.googlemail.com`⁽²⁰⁾
	MX	`aspmx3.googlemail.com`⁽²⁰⁾
	TXT	`2acd5847c66f4325be05af390213b8c7.instructure.com`
	TXT	`MS=ms20700021`
	TXT	`ZOOM_verify_Up1Opd4-S9ChtRORps16qw`
	TXT	`adobe-idp-site-verification=4287460e7429c97ad75b995bdef6b0d7ff1c9b541946abfaf...`
	TXT	`anthropic-domain-verification-2pz98m=hO4bmZQTC5gutJZcanKeagAWR`
	TXT	`anthropic-domain-verification-4mh4xs=A4vkPXqJIA4VVi9GAbxDEPohr`
	TXT	`anthropic-domain-verification-pz1pr3=sZkvFuBJeSdmEXoj4KJYYQW8Z`
	TXT	`anthropic-domain-verification-vz61c8=kfBobb4vvH2M9xtsZhFajtKHr`
	TXT	`apple-domain-verification=8oZZjgKWADRgkWui`
	TXT	`astro-domain-verification=cmbjhzn9b0c0h01pimts1v2h1`
	TXT	`atlassian-domain-verification=pS8CbCDhL3R1mMujl07LwhltWFcJtks8mrBa7l/1uocODR9...`
	TXT	`bugcrowd-verification=817deedf9414a9ea878ff255c42a9afa`
	TXT	`canva-site-verification=jRPvv0c9AZGTaJIIPIpfAQ`
	TXT	`canva-site-verification=jiASD5n0aNnvUnfIP1w4XA`
	TXT	`docker-verification=7555bc65-ce7a-4ed2-8028-4bf0274d2c5b`
	TXT	`docusign=1ca86ab9-2ddb-4d63-b719-4798811390ca`
	TXT	`drift-domain-verification=608941e9992460f0ccd58daa1decf1808863da188a929106582...`
	TXT	`fastly-domain-delegation-jpv3oeoqr3aouxwkbhpb-00480650-2025-07-31`
	TXT	`figma-domain-verification=848b9254b032bfe488e955a140a8a63cb345186c3c69b7200f7...`
	TXT	`google-site-verification=3SDlSr_fW_6bYm0BDDK4ZXs6I5yKtB4WyXL3GNozx8I`
	TXT	`google-site-verification=Som6bbrVvI5NLh3lTcpNSbp6_0GpFezQQ9xo6CrSHOQ`
	TXT	`google-site-verification=WSlNW84_Zm6mbOaM35pQyLJUt7-OtVXNjzXe9LT-eJI`
	TXT	`google-site-verification=bC89ByaBs616PDmJLrSUG5RS3fyA8agwCtXch9G0GL0`
	TXT	`hcp-domain-verification=24de36f1e2e1ad573ac320a62707e7ec8ac0cce2dccf7985914a8...`
	TXT	`jamf-site-verification=-bAufptjYdQAfzF-s7PBtQ`
	TXT	`m6bll7f2q2d2uidl6cq273dma0`
	TXT	`miro-verification=0ee36f655f5ce0499683c255714fcdbe990af0e0`
	TXT	`mongodb-site-verification=UyyatYgRcdnc3W9g8StgD1OK8wfcIouE`
	TXT	`onetrust-domain-verification=5ef48d8081ac4ab6adce9ed80c92f4e5`
	TXT	`openai-domain-verification=dv-wb5qFISTkDoktTMXLsDMVuZ0`
	TXT	`pendo-domain-verification=2l9wI_SzXdfdzA0ZCZUES4O0FS0`
	TXT	`sprout-social-715adb3f-6166-4bc5-b3d9-b1faf326db31`
	TXT	`v=spf1 include:_spf.google.com include:amazonses.com include:_spf.q4press.com...`
	TXT	`zapier-domain-verification-challenge=fe79b183-171c-432c-bf5d-48b3e73fd0af`
	TXT	`zoho-verification=zb08654551.zmverify.zoho.com`
	SOA	`ns-2.awsdns-00.com`awsdns-hostmaster@amazon.com serial=1

WOT: SAFE (87/100)
rank #1356 globally
rank #731 in the tld
WOT: SAFE (91/100)
📈 Tranco rank: #1,244

Same first word

cluster25.io

DNS History

21 records (1 active, 20 former)

○A107.21.4.942016-01-20 → 2016-01-20 · 4 obs

○ 2015-10-31 12:16:12
● 2016-01-20 20:23:48
○ 2016-03-04 20:56:38
○ 2026-06-06 02:50:00

○A107.21.50.1982015-10-31 → 2015-10-31 · 4 obs

○ 2015-10-21 20:11:20
● 2015-10-31 12:16:12
○ 2016-01-20 20:23:48
○ 2026-06-06 02:50:00

○A107.23.209.2172015-06-06 → 2026-02-16 · 4 obs

● 2015-06-06 04:04:44
● 2026-02-16 22:18:14
○ 2026-02-17 22:12:10
○ 2026-06-06 02:50:00

○A52.0.160.2242015-06-06 → 2026-02-16 · 4 obs

● 2015-06-06 04:04:44
● 2026-02-16 22:18:14
○ 2026-02-17 22:12:10
○ 2026-06-06 02:50:00

○A52.0.75.1412016-03-04 → 2016-03-04 · 4 obs

○ 2016-01-20 20:23:48
● 2016-03-04 20:56:38
○ 2016-04-11 11:18:02
○ 2026-06-06 02:50:00

○A52.20.251.22016-03-04 → 2016-03-04 · 4 obs

○ 2016-01-20 20:23:48
● 2016-03-04 20:56:38
○ 2016-04-11 11:18:02
○ 2026-06-06 02:50:00

○A52.205.97.542016-09-22 → 2026-02-16 · 5 obs

○ 2016-04-11 11:18:02
● 2016-09-22 02:28:50
● 2026-02-16 22:18:14
○ 2026-02-17 22:12:10
○ 2026-06-06 02:50:00

○A52.4.100.2532015-10-21 → 2015-10-21 · 4 obs

○ 2015-06-06 04:04:44
● 2015-10-21 20:11:20
○ 2015-10-31 12:16:12
○ 2026-06-06 02:50:00

○A52.5.35.2072015-10-31 → 2015-10-31 · 4 obs

○ 2015-10-21 20:11:20
● 2015-10-31 12:16:12
○ 2016-01-20 20:23:48
○ 2026-06-06 02:50:00

○A52.6.69.172016-01-20 → 2016-01-20 · 4 obs

○ 2015-10-31 12:16:12
● 2016-01-20 20:23:48
○ 2016-03-04 20:56:38
○ 2026-06-06 02:50:00

○A52.87.89.292016-04-11 → 2016-04-11 · 4 obs

○ 2016-03-04 20:56:38
● 2016-04-11 11:18:02
○ 2016-09-22 02:28:50
○ 2026-06-06 02:50:00

○A54.164.250.722015-10-31 → 2015-10-31 · 4 obs

○ 2015-10-21 20:11:20
● 2015-10-31 12:16:12
○ 2016-01-20 20:23:48
○ 2026-06-06 02:50:00

○A54.174.158.02016-09-22 → 2026-02-16 · 5 obs

○ 2016-04-11 11:18:02
● 2016-09-22 02:28:50
● 2026-02-16 22:18:14
○ 2026-02-17 22:12:10
○ 2026-06-06 02:50:00

○A54.174.179.1602015-10-21 → 2015-10-21 · 4 obs

○ 2015-06-06 04:04:44
● 2015-10-21 20:11:20
○ 2015-10-31 12:16:12
○ 2026-06-06 02:50:00

○A54.208.97.622016-04-11 → 2016-04-11 · 4 obs

○ 2016-03-04 20:56:38
● 2016-04-11 11:18:02
○ 2016-09-22 02:28:50
○ 2026-06-06 02:50:00

○A54.209.41.1412016-01-20 → 2016-03-04 · 5 obs

○ 2015-10-31 12:16:12
● 2016-01-20 20:23:48
● 2016-03-04 20:56:38
○ 2016-04-11 11:18:02
○ 2026-06-06 02:50:00

○A54.236.181.2342016-09-22 → 2026-02-16 · 5 obs

○ 2016-04-11 11:18:02
● 2016-09-22 02:28:50
● 2026-02-16 22:18:14
○ 2026-02-17 22:12:10
○ 2026-06-06 02:50:00

○A54.86.97.472015-06-06 → 2026-02-16 · 4 obs

● 2015-06-06 04:04:44
● 2026-02-16 22:18:14
○ 2026-02-17 22:12:10
○ 2026-06-06 02:50:00

○A54.88.57.952015-10-21 → 2015-10-21 · 4 obs

○ 2015-06-06 04:04:44
● 2015-10-21 20:11:20
○ 2015-10-31 12:16:12
○ 2026-06-06 02:50:00

●CNAMEcanvas-iad-prod-c25-1036235123.us-east-1.elb.amazonaws.com2026-02-14 → 2026-06-06 · 3 obs

○ 2016-09-22 02:28:50
● 2026-02-14 22:26:26
● 2026-06-06 02:50:00

○CNAMEcluster25-2104430952.us-east-1.elb.amazonaws.com2015-06-06 → 2016-09-22 · 4 obs

● 2015-06-06 04:04:44
● 2016-09-22 02:28:50
○ 2026-02-14 22:26:26
○ 2026-06-06 02:50:00

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	b.gtld-servers.net, l.gtld-servers.net, g.gtld-servers.net, j.gtld-servers.net...	-
instructure.com	ns-2.awsdns-00.com, ns-996.awsdns-60.net, ns-1799.awsdns-32.co.uk, ns-1354.awsdns-41.org	2 records
instructure.com	ns-1354.awsdns-41.org, ns-1799.awsdns-32.co.uk, ns-2.awsdns-00.com, ns-996.awsdns-60.net	-
instructure.com	ns-1354.awsdns-41.org, ns-1799.awsdns-32.co.uk, ns-2.awsdns-00.com, ns-996.awsdns-60.net	-
instructure.com	ns-1354.awsdns-41.org, ns-1799.awsdns-32.co.uk, ns-2.awsdns-00.com, ns-996.awsdns-60.net	-
instructure.com	ns-1354.awsdns-41.org, ns-1799.awsdns-32.co.uk, ns-2.awsdns-00.com, ns-996.awsdns-60.net	-
instructure.com	ns-1354.awsdns-41.org, ns-1799.awsdns-32.co.uk, ns-2.awsdns-00.com, ns-996.awsdns-60.net	-
instructure.com	ns-1354.awsdns-41.org, ns-1799.awsdns-32.co.uk, ns-2.awsdns-00.com, ns-996.awsdns-60.net	-
instructure.com	ns-1354.awsdns-41.org, ns-1799.awsdns-32.co.uk, ns-2.awsdns-00.com, ns-996.awsdns-60.net	-
instructure.com	ns-1354.awsdns-41.org, ns-1799.awsdns-32.co.uk, ns-2.awsdns-00.com, ns-996.awsdns-60.net	-
instructure.com	ns-1354.awsdns-41.org, ns-1799.awsdns-32.co.uk, ns-2.awsdns-00.com, ns-996.awsdns-60.net	-
instructure.com	ns-1354.awsdns-41.org, ns-1799.awsdns-32.co.uk, ns-2.awsdns-00.com, ns-996.awsdns-60.net	-
instructure.com	ns-1354.awsdns-41.org, ns-1799.awsdns-32.co.uk, ns-2.awsdns-00.com, ns-996.awsdns-60.net	-
instructure.com	ns-1354.awsdns-41.org, ns-1799.awsdns-32.co.uk, ns-2.awsdns-00.com, ns-996.awsdns-60.net	-
instructure.com	ns-1354.awsdns-41.org, ns-1799.awsdns-32.co.uk, ns-2.awsdns-00.com, ns-996.awsdns-60.net	-
instructure.com	ns-1354.awsdns-41.org, ns-1799.awsdns-32.co.uk, ns-2.awsdns-00.com, ns-996.awsdns-60.net	-
instructure.com	ns-1354.awsdns-41.org, ns-1799.awsdns-32.co.uk, ns-2.awsdns-00.com, ns-996.awsdns-60.net	-
instructure.com	ns-1354.awsdns-41.org, ns-1799.awsdns-32.co.uk, ns-2.awsdns-00.com, ns-996.awsdns-60.net	-
instructure.com	ns-1354.awsdns-41.org, ns-1799.awsdns-32.co.uk, ns-2.awsdns-00.com, ns-996.awsdns-60.net	-
instructure.com	ns-1354.awsdns-41.org, ns-1799.awsdns-32.co.uk, ns-2.awsdns-00.com, ns-996.awsdns-60.net	-
instructure.com	ns-1354.awsdns-41.org, ns-1799.awsdns-32.co.uk, ns-2.awsdns-00.com, ns-996.awsdns-60.net	-

✅ Authoritative Response

Server:205.251.197.74

NS records: ns-1354.awsdns-41.org, ns-1799.awsdns-32.co.uk, ns-2.awsdns-00.com, ns-996.awsdns-60.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for instructure.com (unsigned zone)

⏱️ Timing

Total: 1908ms | Queries: -

📄 Records

Type	Count	Sample Data
CNAME	1	`canvas-iad-prod-c25-1036235123.us-east-1`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns-2.awsdns-00.com, ns-2.awsdns-00.com)

Analysis

IP Addresses

cluster25.instructure.com has three IP addresses: 44.199.237.40, 44.199.237.103 and 44.199.238.230.

canvas-iad-prod-c223-1667444296.us-east-1.elb.amazonaws.com is an example of another host name that shares IP numbers with cluster25.instructure.com.

cluster25.instructure.com - robtex.com