`sc4.instructure.com`

DNSSEC	⚠️ Not signed
A	13.33.109.44^{🇺🇸 Amazon13.33.109.0/24 - Cloudfront}
		PTR	`server-13-33-109-44.bos50.r.cloudfront.net`
A	13.33.109.94^{🇺🇸 Amazon13.33.109.0/24 - Cloudfront}
A	13.33.109.97^{🇺🇸 Amazon13.33.109.0/24 - Cloudfront}
A	13.33.109.117^{🇺🇸 Amazon13.33.109.0/24 - Cloudfront}

`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 #1312 globally
rank #712 in the tld
WOT: SAFE (91/100)
📈 Tranco rank: #878

Same first word

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DNS History

26 records (4 active, 22 former)

○A108.139.134.102026-04-14 → 2026-04-14 · 4 obs

○ 2026-04-13 18:17:46
● 2026-04-14 13:54:42
○ 2026-04-15 08:45:22
○ 2026-04-23 19:59:28

○A108.139.134.1202026-04-14 → 2026-04-14 · 4 obs

○ 2026-04-13 18:17:46
● 2026-04-14 13:54:42
○ 2026-04-15 08:45:22
○ 2026-04-23 19:59:28

○A108.139.134.1222026-04-14 → 2026-04-14 · 4 obs

○ 2026-04-13 18:17:46
● 2026-04-14 13:54:42
○ 2026-04-15 08:45:22
○ 2026-04-23 19:59:28

○A108.139.134.782026-04-14 → 2026-04-14 · 4 obs

○ 2026-04-13 18:17:46
● 2026-04-14 13:54:42
○ 2026-04-15 08:45:22
○ 2026-04-23 19:59:28

○A13.226.144.122026-04-15 → 2026-04-22 · 7 obs

○ 2026-04-14 13:54:42
● 2026-04-15 08:45:22
● 2026-04-22 05:17:00
○ 2026-04-22 07:42:44
● 2026-04-22 16:51:52
○ 2026-04-23 04:37:02
○ 2026-04-23 19:59:28

○A13.226.144.432026-04-15 → 2026-04-22 · 7 obs

○ 2026-04-14 13:54:42
● 2026-04-15 08:45:22
● 2026-04-22 05:17:00
○ 2026-04-22 07:42:44
● 2026-04-22 16:51:52
○ 2026-04-23 04:37:02
○ 2026-04-23 19:59:28

○A13.226.144.62026-04-15 → 2026-04-22 · 7 obs

○ 2026-04-14 13:54:42
● 2026-04-15 08:45:22
● 2026-04-22 05:17:00
○ 2026-04-22 07:42:44
● 2026-04-22 16:51:52
○ 2026-04-23 04:37:02
○ 2026-04-23 19:59:28

○A13.226.144.612026-04-15 → 2026-04-22 · 7 obs

○ 2026-04-14 13:54:42
● 2026-04-15 08:45:22
● 2026-04-22 05:17:00
○ 2026-04-22 07:42:44
● 2026-04-22 16:51:52
○ 2026-04-23 04:37:02
○ 2026-04-23 19:59:28

●A13.33.109.1172026-04-22 → 2026-04-23 · 8 obs

○ 2026-04-22 05:17:00
● 2026-04-22 07:42:44
○ 2026-04-22 16:51:52
○ 2026-04-23 16:21:34
● 2026-04-23 17:00:46
○ 2026-04-23 18:31:10
● 2026-04-23 19:59:26
● 2026-04-23 19:59:28

●A13.33.109.442026-04-22 → 2026-04-23 · 8 obs

○ 2026-04-22 05:17:00
● 2026-04-22 07:42:44
○ 2026-04-22 16:51:52
○ 2026-04-23 16:21:34
● 2026-04-23 17:00:46
○ 2026-04-23 18:31:10
● 2026-04-23 19:59:26
● 2026-04-23 19:59:28

●A13.33.109.942026-04-22 → 2026-04-23 · 8 obs

○ 2026-04-22 05:17:00
● 2026-04-22 07:42:44
○ 2026-04-22 16:51:52
○ 2026-04-23 16:21:34
● 2026-04-23 17:00:46
○ 2026-04-23 18:31:10
● 2026-04-23 19:59:26
● 2026-04-23 19:59:28

●A13.33.109.972026-04-22 → 2026-04-23 · 8 obs

○ 2026-04-22 05:17:00
● 2026-04-22 07:42:44
○ 2026-04-22 16:51:52
○ 2026-04-23 16:21:34
● 2026-04-23 17:00:46
○ 2026-04-23 18:31:10
● 2026-04-23 19:59:26
● 2026-04-23 19:59:28

○A34.195.5.1282017-05-19 → 2017-05-19 · 3 obs

● 2017-05-19 15:14:42
○ 2026-04-13 18:17:46
○ 2026-04-23 19:59:28

○A34.206.12.1242017-05-19 → 2017-05-19 · 3 obs

● 2017-05-19 15:14:42
○ 2026-04-13 18:17:46
○ 2026-04-23 19:59:28

○A54.81.118.2332017-05-19 → 2017-05-19 · 3 obs

● 2017-05-19 15:14:42
○ 2026-04-13 18:17:46
○ 2026-04-23 19:59:28

○A99.84.41.1012026-04-13 → 2026-04-13 · 4 obs

○ 2017-05-19 15:14:42
● 2026-04-13 18:17:46
○ 2026-04-14 13:54:42
○ 2026-04-23 19:59:28

○A99.84.41.152026-04-13 → 2026-04-13 · 4 obs

○ 2017-05-19 15:14:42
● 2026-04-13 18:17:46
○ 2026-04-14 13:54:42
○ 2026-04-23 19:59:28

○A99.84.41.362026-04-13 → 2026-04-13 · 4 obs

○ 2017-05-19 15:14:42
● 2026-04-13 18:17:46
○ 2026-04-14 13:54:42
○ 2026-04-23 19:59:28

○A99.84.41.722026-04-13 → 2026-04-13 · 4 obs

○ 2017-05-19 15:14:42
● 2026-04-13 18:17:46
○ 2026-04-14 13:54:42
○ 2026-04-23 19:59:28

○A99.86.12.1292026-04-23 → 2026-04-23 · 7 obs

○ 2026-04-22 16:51:52
● 2026-04-23 04:37:02
● 2026-04-23 16:21:34
○ 2026-04-23 17:00:46
● 2026-04-23 18:31:10
○ 2026-04-23 19:59:26
○ 2026-04-23 19:59:28

○A99.86.12.22026-04-23 → 2026-04-23 · 7 obs

○ 2026-04-22 16:51:52
● 2026-04-23 04:37:02
● 2026-04-23 16:21:34
○ 2026-04-23 17:00:46
● 2026-04-23 18:31:10
○ 2026-04-23 19:59:26
○ 2026-04-23 19:59:28

○A99.86.12.202026-04-23 → 2026-04-23 · 7 obs

○ 2026-04-22 16:51:52
● 2026-04-23 04:37:02
● 2026-04-23 16:21:34
○ 2026-04-23 17:00:46
● 2026-04-23 18:31:10
○ 2026-04-23 19:59:26
○ 2026-04-23 19:59:28

○A99.86.12.882026-04-23 → 2026-04-23 · 7 obs

○ 2026-04-22 16:51:52
● 2026-04-23 04:37:02
● 2026-04-23 16:21:34
○ 2026-04-23 17:00:46
● 2026-04-23 18:31:10
○ 2026-04-23 19:59:26
○ 2026-04-23 19:59:28

○CNAMEcanvas-iad-prod-c44-1950062825.us-east-1.elb.amazonaws.com2017-05-19 → 2017-05-19 · 3 obs

● 2017-05-19 15:14:42
○ 2026-04-13 18:17:46
○ 2026-04-23 19:59:28

○CNAMEcluster207.instructure.com2026-04-13 → 2026-04-23 · 2 obs

○ 2026-04-13 18:17:46
○ 2026-04-23 19:59:28

○CNAMEcluster44.instructure.com2017-05-19 → 2017-05-19 · 3 obs

● 2017-05-19 15:14:42
○ 2026-04-13 18:17:46
○ 2026-04-23 19:59:28

🔍 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:205.251.192.2

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: 336ms | Queries: -

📄 Records

Type	Count	Sample Data
A	4	`13.33.109.97, 13.33.109.44...`

📌 Glue Records Collected

Total: 2

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

Analysis

IP Addresses

sc4.instructure.com maps to four IP numbers: 13.33.109.44, 13.33.109.94, 13.33.109.97 and 13.33.109.117.

other host names include dogsrule.com, d2kjd5q2joe7b5.cloudfront.net, d1hh8llbaciabs.cloudfront.net, readbox.net and d1q614v4564c0p.cloudfront.net; they share IP numbers with sc4.instructure.com.

sc4.instructure.com - robtex.com