`stu.instructure.com`

DNSSEC	⚠️ Not signed
A	18.239.168.11^{🇺🇸 Amazon18.239.168.0/23}
		PTR	`server-18-239-168-11.bos50.r.cloudfront.net`
A	18.239.168.86^{🇺🇸 Amazon18.239.168.0/23}
A	18.239.168.88^{🇺🇸 Amazon18.239.168.0/23}
A	18.239.168.125^{🇺🇸 Amazon18.239.168.0/23}

`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=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	`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 #1345 globally
rank #731 in the tld
WOT: SAFE (91/100)
📈 Tranco rank: #877

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DNS History

33 records (4 active, 29 former)

○A108.158.186.1162026-05-06 → 2026-05-09 · 8 obs

○ 2026-05-06 14:26:56
● 2026-05-06 16:12:22
● 2026-05-06 17:20:52
○ 2026-05-06 20:19:04
○ 2026-05-09 14:34:04
● 2026-05-09 19:57:14
○ 2026-05-09 20:30:26
○ 2026-05-10 08:22:00

○A108.158.186.22026-05-06 → 2026-05-09 · 8 obs

○ 2026-05-06 14:26:56
● 2026-05-06 16:12:22
● 2026-05-06 17:20:52
○ 2026-05-06 20:19:04
○ 2026-05-09 14:34:04
● 2026-05-09 19:57:14
○ 2026-05-09 20:30:26
○ 2026-05-10 08:22:00

○A108.158.186.342026-05-06 → 2026-05-09 · 8 obs

○ 2026-05-06 14:26:56
● 2026-05-06 16:12:22
● 2026-05-06 17:20:52
○ 2026-05-06 20:19:04
○ 2026-05-09 14:34:04
● 2026-05-09 19:57:14
○ 2026-05-09 20:30:26
○ 2026-05-10 08:22:00

○A108.158.186.992026-05-06 → 2026-05-09 · 8 obs

○ 2026-05-06 14:26:56
● 2026-05-06 16:12:22
● 2026-05-06 17:20:52
○ 2026-05-06 20:19:04
○ 2026-05-09 14:34:04
● 2026-05-09 19:57:14
○ 2026-05-09 20:30:26
○ 2026-05-10 08:22:00

○A13.226.144.122026-04-03 → 2026-04-21 · 14 obs

○ 2026-04-03 05:42:32
● 2026-04-03 21:43:48
○ 2026-04-05 12:26:36
○ 2026-04-05 13:21:34
● 2026-04-05 18:58:52
● 2026-04-07 07:02:02
○ 2026-04-08 01:08:22
○ 2026-04-09 06:43:50
● 2026-04-09 11:56:28
● 2026-04-12 18:18:46
○ 2026-04-21 10:51:16
● 2026-04-21 18:26:12
○ 2026-04-24 10:28:26
○ 2026-05-10 08:22:00

○A13.226.144.432026-04-03 → 2026-04-21 · 14 obs

○A13.226.144.62026-04-03 → 2026-04-21 · 14 obs

○A13.226.144.612026-04-03 → 2026-04-21 · 14 obs

○A13.227.107.302026-04-05 → 2026-04-29 · 11 obs

○ 2026-04-05 12:26:36
● 2026-04-05 13:21:34
○ 2026-04-05 18:58:52
○ 2026-04-07 07:02:02
● 2026-04-08 01:08:22
● 2026-04-09 06:43:50
○ 2026-04-09 11:56:28
○ 2026-04-29 04:31:48
● 2026-04-29 14:19:20
○ 2026-04-29 14:55:16
○ 2026-05-10 08:22:00

○A13.227.107.462026-04-05 → 2026-04-29 · 11 obs

○A13.227.107.502026-04-05 → 2026-04-29 · 11 obs

○A13.227.107.582026-04-05 → 2026-04-29 · 11 obs

○A13.227.110.22026-05-01 → 2026-05-08 · 26 obs

○ 2026-05-01 15:02:20
● 2026-05-01 19:55:28
○ 2026-05-01 20:30:24
○ 2026-05-02 00:27:46
● 2026-05-02 03:21:54
● 2026-05-02 06:10:30
○ 2026-05-02 10:05:14
○ 2026-05-04 09:09:54
● 2026-05-04 14:32:14
● 2026-05-04 15:38:12
○ 2026-05-04 17:12:20
○ 2026-05-04 21:20:26
● 2026-05-05 09:55:16
○ 2026-05-05 10:57:12
○ 2026-05-07 20:06:36
● 2026-05-07 21:34:02
○ 2026-05-08 00:30:52
○ 2026-05-08 01:52:10
● 2026-05-08 08:31:24
○ 2026-05-08 10:07:04
● 2026-05-08 11:14:02
○ 2026-05-08 13:57:00
○ 2026-05-08 17:07:38
● 2026-05-08 20:03:42
○ 2026-05-08 22:26:34
○ 2026-05-10 08:22:00

○A13.227.110.272026-05-01 → 2026-05-08 · 26 obs

○A13.227.110.432026-05-01 → 2026-05-08 · 26 obs

○A13.227.110.772026-05-01 → 2026-05-08 · 26 obs

○A13.33.109.1172026-04-21 → 2026-05-09 · 16 obs

○ 2026-04-12 18:18:46
● 2026-04-21 10:51:16
○ 2026-04-21 18:26:12
○ 2026-04-26 06:23:32
● 2026-04-26 21:25:28
○ 2026-04-26 22:18:06
○ 2026-05-01 22:59:52
● 2026-05-02 00:27:46
○ 2026-05-02 03:21:54
○ 2026-05-02 12:18:16
● 2026-05-02 13:14:40
○ 2026-05-02 14:35:16
○ 2026-05-09 09:09:46
● 2026-05-09 13:45:42
○ 2026-05-09 14:34:04
○ 2026-05-10 08:22:00

○A13.33.109.442026-04-21 → 2026-05-09 · 16 obs

○A13.33.109.942026-04-21 → 2026-05-09 · 16 obs

○A13.33.109.972026-04-21 → 2026-05-09 · 16 obs

●A18.239.168.112026-05-10 → 2026-05-10 · 3 obs

○ 2026-05-10 06:30:20
● 2026-05-10 08:21:58
● 2026-05-10 08:22:00

●A18.239.168.1252026-05-10 → 2026-05-10 · 3 obs

○ 2026-05-10 06:30:20
● 2026-05-10 08:21:58
● 2026-05-10 08:22:00

●A18.239.168.862026-05-10 → 2026-05-10 · 3 obs

○ 2026-05-10 06:30:20
● 2026-05-10 08:21:58
● 2026-05-10 08:22:00

●A18.239.168.882026-05-10 → 2026-05-10 · 3 obs

○ 2026-05-10 06:30:20
● 2026-05-10 08:21:58
● 2026-05-10 08:22:00

○A18.64.155.1012026-04-03 → 2026-04-05 · 5 obs

● 2026-04-03 05:42:32
○ 2026-04-03 21:43:48
● 2026-04-05 12:26:36
○ 2026-04-05 13:21:34
○ 2026-05-10 08:22:00

○A18.64.155.322026-04-03 → 2026-04-05 · 5 obs

● 2026-04-03 05:42:32
○ 2026-04-03 21:43:48
● 2026-04-05 12:26:36
○ 2026-04-05 13:21:34
○ 2026-05-10 08:22:00

○A18.64.155.352026-04-03 → 2026-04-05 · 5 obs

● 2026-04-03 05:42:32
○ 2026-04-03 21:43:48
● 2026-04-05 12:26:36
○ 2026-04-05 13:21:34
○ 2026-05-10 08:22:00

○A18.64.155.492026-04-03 → 2026-04-05 · 5 obs

● 2026-04-03 05:42:32
○ 2026-04-03 21:43:48
● 2026-04-05 12:26:36
○ 2026-04-05 13:21:34
○ 2026-05-10 08:22:00

○A99.86.12.1292026-04-24 → 2026-05-10 · 48 obs

○ 2026-04-21 18:26:12
● 2026-04-24 10:28:26
● 2026-04-26 06:23:32
○ 2026-04-26 21:25:28
● 2026-04-26 22:18:06
● 2026-04-29 04:31:48
○ 2026-04-29 14:19:20
● 2026-04-29 14:55:16
● 2026-05-01 15:02:20
○ 2026-05-01 19:55:28
● 2026-05-01 20:30:24
● 2026-05-01 22:59:52
○ 2026-05-02 00:27:46
○ 2026-05-02 06:10:30
● 2026-05-02 10:05:14
● 2026-05-02 12:18:16
○ 2026-05-02 13:14:40
● 2026-05-02 14:35:16
● 2026-05-04 09:09:54
○ 2026-05-04 14:32:14
○ 2026-05-04 15:38:12
● 2026-05-04 17:12:20
● 2026-05-04 21:20:26
○ 2026-05-05 09:55:16
● 2026-05-05 10:57:12
● 2026-05-06 14:26:56
○ 2026-05-06 16:12:22
○ 2026-05-06 17:20:52
● 2026-05-06 20:19:04
● 2026-05-07 20:06:36
○ 2026-05-07 21:34:02
● 2026-05-08 00:30:52
● 2026-05-08 01:52:10
○ 2026-05-08 08:31:24
● 2026-05-08 10:07:04
○ 2026-05-08 11:14:02
● 2026-05-08 13:57:00
● 2026-05-08 17:07:38
○ 2026-05-08 20:03:42
● 2026-05-08 22:26:34
● 2026-05-09 09:09:46
○ 2026-05-09 13:45:42
● 2026-05-09 14:34:04
○ 2026-05-09 19:57:14
● 2026-05-09 20:30:26
● 2026-05-10 06:30:20
○ 2026-05-10 08:21:58
○ 2026-05-10 08:22:00

○A99.86.12.22026-04-24 → 2026-05-10 · 48 obs

○A99.86.12.202026-04-24 → 2026-05-10 · 48 obs

○A99.86.12.882026-04-24 → 2026-05-10 · 48 obs

○CNAMEcluster20.instructure.com2017-11-04 → 2017-11-04 · 3 obs

● 2017-11-04 17:55:38
○ 2026-04-03 05:42:32
○ 2026-05-10 08:22:00

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.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

✅ Authoritative Response

Server:205.251.199.7

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for instructure.com (unsigned zone)

⏱️ Timing

Total: 477ms | Queries: -

📄 Records

Type	Count	Sample Data
A	4	`18.239.168.86, 18.239.168.125...`

📌 Glue Records Collected

Total: 2

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

Analysis

IP Addresses

stu.instructure.com resolves to four IPs: 18.239.168.11, 18.239.168.86, 18.239.168.88 and 18.239.168.125.

Other host names such as apply-web.prodau.sortedservices.com, groups.blogs.deine-tierwelt.de, oncotype.com, d7gh7xo107sam.cloudfront.net and yoyokki.com share IP numbers with stu.instructure.com.

stu.instructure.com - robtex.com